Will this circuit work? | Electronics Forum (Circuits, Projects and Microcontrollers)

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It may not display this or other websites correctly.<br />You should upgrade or use an <a href="https://www.google.com/chrome/" target="_blank" rel="noopener">alternative browser</a>.</div> <div class="p-body-header"> <div class="p-title "> <h1 class="p-title-value">Will this circuit work?</h1> </div> <div class="p-description"> <ul class="listInline listInline--bullet"> <li> <i class="fa--xf fal fa-user" aria-hidden="true" title="Thread starter"></i> <span class="u-srOnly">Thread starter</span> <a href="/members/gary350.35041/" class="username u-concealed" dir="auto" data-user-id="35041" data-xf-init="member-tooltip">gary350</a> </li> <li> <i class="fa--xf fal fa-clock" aria-hidden="true" title="Start date"></i> <span class="u-srOnly">Start date</span> <a href="/threads/will-this-circuit-work.165495/" class="u-concealed"><time class="u-dt" dir="auto" datetime="2023-11-09T14:38:06-0800" data-time="1699569486" data-date-string="Nov 9, 2023" data-time-string="2:38 PM" title="Nov 9, 2023 at 2:38 PM">Nov 9, 2023</time></a> </li> </ul> </div> </div> <div class="p-body-main p-body-main--withSidebar "> <div class="p-body-contentCol"></div> <div class="p-body-sidebarCol"></div> <div class="p-body-content"> <div class="p-body-pageContent"> <div class="block block--messages" data-xf-init="" data-type="post" data-href="/inline-mod/" data-search-target="*"> <span class="u-anchorTarget" id="posts"></span> <div class="block-outer"> <dl class="blockStatus"> <dt>Status</dt> <dd class="blockStatus-message blockStatus-message--locked"> Not open for further replies. </dd> </dl> </div> <div class="block-outer"><div class="block-outer-main"><nav class="pageNavWrapper pageNavWrapper--full "> <div class="pageNav "> <ul class="pageNav-main"> <li class="pageNav-page pageNav-page--current "><a href="/threads/will-this-circuit-work.165495/">1</a></li> <li class="pageNav-page pageNav-page--later"><a href="/threads/will-this-circuit-work.165495/page-2">2</a></li> <li class="pageNav-page "><a href="/threads/will-this-circuit-work.165495/page-3">3</a></li> </ul> <a href="/threads/will-this-circuit-work.165495/page-2" class="pageNav-jump pageNav-jump--next">Next</a> </div> <div class="pageNavSimple"> <a class="pageNavSimple-el pageNavSimple-el--current" data-xf-init="tooltip" title="Go to page" data-xf-click="menu" role="button" tabindex="0" aria-expanded="false" aria-haspopup="true"> 1 of 3 </a> <div class="menu menu--pageJump" data-menu="menu" aria-hidden="true"> <div class="menu-content"> <h4 class="menu-header">Go to page</h4> <div class="menu-row" data-xf-init="page-jump" data-page-url="/threads/will-this-circuit-work.165495/page-%page%"> <div class="inputGroup inputGroup--numbers"> <div class="inputGroup inputGroup--numbers inputNumber" data-xf-init="number-box"><input type="number" pattern="\d*" class="input input--number js-numberBoxTextInput input input--numberNarrow js-pageJumpPage" value="1" min="1" max="3" step="1" required="required" data-menu-autofocus="true" /></div> <span class="inputGroup-text"><button type="button" class="js-pageJumpGo button"><span class="button-text">Go</span></button></span> </div> </div> </div> </div> <a href="/threads/will-this-circuit-work.165495/page-2" class="pageNavSimple-el pageNavSimple-el--next"> Next <i aria-hidden="true"></i> </a> <a href="/threads/will-this-circuit-work.165495/page-3" class="pageNavSimple-el pageNavSimple-el--last" data-xf-init="tooltip" title="Last"> <i aria-hidden="true"></i> <span class="u-srOnly">Last</span> </a> </div> </nav> </div></div> <div class="block-outer js-threadStatusField"></div> <div class="block-container lbContainer" data-xf-init="lightbox select-to-quote" data-message-selector=".js-post" data-lb-id="thread-165495" data-lb-universal="0"> <div class="block-body js-replyNewMessageContainer"> <article class="message message--post js-post js-inlineModContainer " data-author="gary350" data-content="post-1444025" id="js-post-1444025" > <span class="u-anchorTarget" id="post-1444025"></span> <div class="message-inner"> <div class="message-cell message-cell--user"> <section class="message-user" > <div class="message-avatar "> <div class="message-avatar-wrapper"> <a href="/members/gary350.35041/" class="avatar avatar--m avatar--default avatar--default--dynamic" data-user-id="35041" data-xf-init="member-tooltip" style="background-color: #33cc8f; color: #0f3d2b"> <span class="avatar-u35041-m" role="img" aria-label="gary350">G</span> </a> </div> </div> <div class="message-userDetails"> <h4 class="message-name"><a href="/members/gary350.35041/" class="username " dir="auto" data-user-id="35041" data-xf-init="member-tooltip">gary350</a></h4> <h5 class="userTitle message-userTitle" dir="auto">Well-Known Member</h5> </div> <span class="message-userArrow"></span> </section> </div> <div class="message-cell message-cell--main"> <div class="message-main js-quickEditTarget"> <header class="message-attribution message-attribution--split"> <ul class="message-attribution-main listInline "> <li class="u-concealed"> <a href="/threads/will-this-circuit-work.165495/post-1444025" rel="nofollow" > <time class="u-dt" dir="auto" datetime="2023-11-09T14:38:06-0800" data-time="1699569486" data-date-string="Nov 9, 2023" data-time-string="2:38 PM" title="Nov 9, 2023 at 2:38 PM">Nov 9, 2023</time> </a> </li> </ul> <ul class="message-attribution-opposite message-attribution-opposite--list "> <li> <a href="/threads/will-this-circuit-work.165495/post-1444025" class="message-attribution-gadget" data-xf-init="share-tooltip" data-href="/posts/1444025/share" aria-label="Share" rel="nofollow"> <i class="fa--xf fal fa-share-alt" aria-hidden="true"></i> </a> </li> <li> <a href="/threads/will-this-circuit-work.165495/post-1444025" rel="nofollow"> #1 </a> </li> </ul> </header> <div class="message-content js-messageContent"> <div class="message-userContent lbContainer js-lbContainer " data-lb-id="post-1444025" data-lb-caption-desc="gary350 · Nov 9, 2023 at 2:38 PM"> <article class="message-body js-selectToQuote"> <div > <div class="bbWrapper">When the LED flashes will the buzzer buzz. I am only interested is a circuit where the buzzer buzzes about 1 time every second. I have not bought buzzers yet so I can't build a circuit to see if it works. Data on buzzer says nothing about DC or AC. Do data on buzzer volume either. Buzzer is probably about what is in a microwave oven. <script class="js-extraPhrases" type="application/json"> { "lightbox_close": "Close", "lightbox_next": "Next", "lightbox_previous": "Previous", "lightbox_error": "The requested content cannot be loaded. 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js-quickEditTarget"> <header class="message-attribution message-attribution--split"> <ul class="message-attribution-main listInline "> <li class="u-concealed"> <a href="/threads/will-this-circuit-work.165495/post-1444030" rel="nofollow" itemprop="url"> <time class="u-dt" dir="auto" datetime="2023-11-09T15:50:48-0800" data-time="1699573848" data-date-string="Nov 9, 2023" data-time-string="3:50 PM" title="Nov 9, 2023 at 3:50 PM" itemprop="datePublished">Nov 9, 2023</time> </a> </li> </ul> <ul class="message-attribution-opposite message-attribution-opposite--list "> <li> <a href="/threads/will-this-circuit-work.165495/post-1444030" class="message-attribution-gadget" data-xf-init="share-tooltip" data-href="/posts/1444030/share" aria-label="Share" rel="nofollow"> <i class="fa--xf fal fa-share-alt" aria-hidden="true"></i> </a> </li> <li> <a href="/threads/will-this-circuit-work.165495/post-1444030" rel="nofollow"> #2 </a> </li> </ul> </header> <div class="message-content js-messageContent"> <div class="message-userContent lbContainer js-lbContainer " data-lb-id="post-1444030" data-lb-caption-desc="audioguru · Nov 9, 2023 at 3:50 PM"> <article class="message-body js-selectToQuote"> <div itemprop="text"> <div class="bbWrapper">You do not show the important polarity of the LED and "buzzer".<br /> You do not show the important datasheets for the LED and the "buzzer" so that we will know the RANGE of LED voltages (nobody makes a 3.4V LED) and and if the "buzzer" is electro-mechanical or is a piezo beeper with a built-in oscillator.<br /> The battery will be 3V only when it is brand new, then the circuit will soon stop working.</div> </div> <div class="js-selectToQuoteEnd"> </div> </article> </div> <aside class="message-signature"> <div class="bbWrapper">Uncle $crooge</div> </aside> </div> <footer class="message-footer"> <div class="message-microdata" itemprop="interactionStatistic" itemtype="https://schema.org/InteractionCounter" itemscope> <meta 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class="message-attribution-main listInline "> <li class="u-concealed"> <a href="/threads/will-this-circuit-work.165495/post-1444033" rel="nofollow" itemprop="url"> <time class="u-dt" dir="auto" datetime="2023-11-09T16:32:23-0800" data-time="1699576343" data-date-string="Nov 9, 2023" data-time-string="4:32 PM" title="Nov 9, 2023 at 4:32 PM" itemprop="datePublished">Nov 9, 2023</time> </a> </li> </ul> <ul class="message-attribution-opposite message-attribution-opposite--list "> <li> <a href="/threads/will-this-circuit-work.165495/post-1444033" class="message-attribution-gadget" data-xf-init="share-tooltip" data-href="/posts/1444033/share" aria-label="Share" rel="nofollow"> <i class="fa--xf fal fa-share-alt" aria-hidden="true"></i> </a> </li> <li> <a href="/threads/will-this-circuit-work.165495/post-1444033" rel="nofollow"> #3 </a> </li> </ul> </header> <div class="message-content js-messageContent"> <div class="message-userContent lbContainer js-lbContainer " data-lb-id="post-1444033" data-lb-caption-desc="gary350 · Nov 9, 2023 at 4:32 PM"> <article class="message-body js-selectToQuote"> <div itemprop="text"> <div class="bbWrapper"><blockquote data-attributes="member: 16360" data-quote="audioguru" data-source="post: 1444030" class="bbCodeBlock bbCodeBlock--expandable bbCodeBlock--quote js-expandWatch"> <div class="bbCodeBlock-title"> <a href="/goto/post?id=1444030" class="bbCodeBlock-sourceJump" rel="nofollow" data-xf-click="attribution" data-content-selector="#post-1444030">audioguru said:</a> </div> <div class="bbCodeBlock-content"> <div class="bbCodeBlock-expandContent js-expandContent "> You do not show the important polarity of the LED and "buzzer".<br /> You do not show the important datasheets for the LED and the "buzzer" so that we will know the RANGE of LED voltages (nobody makes a 3.4V LED) and and if the "buzzer" is electro-mechanical or is a piezo beeper with a built-in oscillator.<br /> The battery will be 3V only when it is brand new, then the circuit will soon stop working. </div> <div class="bbCodeBlock-expandLink js-expandLink"><a role="button" tabindex="0">Click to expand...</a></div> </div> </blockquote><br /> Online info says, Blue LED is 3.4v, 30ma<br /> <br /> Online info says, buzzer is 3 to 5v, 25ma<br /> <br /> 2 brand new D batteries in series are 3.2v 8a<br /> <br /> I have no part number, no name for buzzer, google is probably generic info. Google search for Buzzer data sheet shows nothing. I need a part number? Probably need a buzzer name too?<br /> <br /> Here is very importing polarity drawing.<br /> <br /> Can the flashing LED turn the buzzer ON?<br /> <br /> <br /> <div class="bbImageWrapper js-lbImage" title="101_8103.JPG" data-src="https://www.electro-tech-online.com/attachments/101_8103-jpg.143277/" data-lb-sidebar-href="" data-lb-caption-extra-html="" data-single-image="1"> <img src="https://www.electro-tech-online.com/attachments/101_8103-jpg.143277/" data-url="" class="bbImage" data-zoom-target="1" style="" alt="101_8103.JPG" title="101_8103.JPG" width="2048" height="1536" loading="lazy" /> </div></div> </div> <div class="js-selectToQuoteEnd"> </div> </article> </div> <div class="message-lastEdit"> Last edited: <time class="u-dt" dir="auto" datetime="2023-11-09T16:50:34-0800" data-time="1699577434" data-date-string="Nov 9, 2023" data-time-string="4:50 PM" title="Nov 9, 2023 at 4:50 PM" itemprop="dateModified">Nov 9, 2023</time> </div> </div> <footer class="message-footer"> <div class="message-microdata" itemprop="interactionStatistic" itemtype="https://schema.org/InteractionCounter" itemscope> <meta itemprop="userInteractionCount" content="0" /> <meta itemprop="interactionType" content="https://schema.org/LikeAction" /> </div> <div class="reactionsBar js-reactionsList "> </div> <div class="js-historyTarget message-historyTarget toggleTarget" data-href="trigger-href"></div> </footer> </div> </div> </div> </article> <article class="message message--post js-post js-inlineModContainer " data-author="eTech" data-content="post-1444035" id="js-post-1444035" itemscope itemtype="https://schema.org/Comment" itemid="https://www.electro-tech-online.com/posts/1444035/"> <meta itemprop="parentItem" itemscope itemid="https://www.electro-tech-online.com/threads/will-this-circuit-work.165495/" /> <span class="u-anchorTarget" id="post-1444035"></span> <div class="message-inner"> <div class="message-cell message-cell--user"> <section class="message-user" itemprop="author" itemscope itemtype="https://schema.org/Person" itemid="https://www.electro-tech-online.com/members/etech.201801/"> <meta itemprop="url" content="https://www.electro-tech-online.com/members/etech.201801/" /> <div class="message-avatar "> <div class="message-avatar-wrapper"> <a href="/members/etech.201801/" class="avatar avatar--m avatar--default avatar--default--dynamic" data-user-id="201801" data-xf-init="member-tooltip" style="background-color: #6629a3; color: #bf99e6"> <span class="avatar-u201801-m" role="img" aria-label="eTech">E</span> </a> </div> </div> <div class="message-userDetails"> <h4 class="message-name"><a href="/members/etech.201801/" class="username " dir="auto" data-user-id="201801" data-xf-init="member-tooltip"><span itemprop="name">eTech</span></a></h4> <h5 class="userTitle message-userTitle" dir="auto" itemprop="jobTitle">Well-Known Member</h5> </div> <span class="message-userArrow"></span> </section> </div> <div class="message-cell message-cell--main"> <div class="message-main js-quickEditTarget"> <header class="message-attribution message-attribution--split"> <ul class="message-attribution-main listInline "> <li class="u-concealed"> <a href="/threads/will-this-circuit-work.165495/post-1444035" rel="nofollow" itemprop="url"> <time class="u-dt" dir="auto" datetime="2023-11-09T16:41:41-0800" data-time="1699576901" data-date-string="Nov 9, 2023" data-time-string="4:41 PM" title="Nov 9, 2023 at 4:41 PM" itemprop="datePublished">Nov 9, 2023</time> </a> </li> </ul> <ul class="message-attribution-opposite message-attribution-opposite--list "> <li> <a href="/threads/will-this-circuit-work.165495/post-1444035" class="message-attribution-gadget" data-xf-init="share-tooltip" data-href="/posts/1444035/share" aria-label="Share" rel="nofollow"> <i class="fa--xf fal fa-share-alt" aria-hidden="true"></i> </a> </li> <li> <a href="/threads/will-this-circuit-work.165495/post-1444035" rel="nofollow"> #4 </a> </li> </ul> </header> <div class="message-content js-messageContent"> <div class="message-userContent lbContainer js-lbContainer " data-lb-id="post-1444035" data-lb-caption-desc="eTech · Nov 9, 2023 at 4:41 PM"> <article class="message-body js-selectToQuote"> <div itemprop="text"> <div class="bbWrapper">There are different types of buzzers. Some have built in drive electronics such that it will buzz as long as voltage is applied. Others don't have the electronics, so the drive electronics would have to be provided by the designer. The datasheet would specify the type.</div> </div> <div class="js-selectToQuoteEnd"> </div> </article> </div> </div> <footer class="message-footer"> <div class="message-microdata" itemprop="interactionStatistic" itemtype="https://schema.org/InteractionCounter" itemscope> <meta itemprop="userInteractionCount" content="0" /> <meta itemprop="interactionType" content="https://schema.org/LikeAction" /> </div> <div class="reactionsBar js-reactionsList "> </div> <div class="js-historyTarget message-historyTarget toggleTarget" data-href="trigger-href"></div> </footer> </div> </div> </div> </article> <article class="message message--post js-post js-inlineModContainer " data-author="gary350" data-content="post-1444036" id="js-post-1444036" itemscope itemtype="https://schema.org/Comment" itemid="https://www.electro-tech-online.com/posts/1444036/"> <meta itemprop="parentItem" itemscope itemid="https://www.electro-tech-online.com/threads/will-this-circuit-work.165495/" /> <span class="u-anchorTarget" id="post-1444036"></span> <div class="message-inner"> <div class="message-cell message-cell--user"> <section class="message-user" itemprop="author" itemscope itemtype="https://schema.org/Person" itemid="https://www.electro-tech-online.com/members/gary350.35041/"> <meta itemprop="url" content="https://www.electro-tech-online.com/members/gary350.35041/" /> <div class="message-avatar "> <div class="message-avatar-wrapper"> <a href="/members/gary350.35041/" class="avatar avatar--m avatar--default avatar--default--dynamic" data-user-id="35041" data-xf-init="member-tooltip" style="background-color: #33cc8f; color: #0f3d2b"> <span class="avatar-u35041-m" role="img" aria-label="gary350">G</span> </a> </div> </div> <div class="message-userDetails"> <h4 class="message-name"><a href="/members/gary350.35041/" class="username " dir="auto" data-user-id="35041" data-xf-init="member-tooltip"><span itemprop="name">gary350</span></a></h4> <h5 class="userTitle message-userTitle" dir="auto" itemprop="jobTitle">Well-Known Member</h5> </div> <span class="message-userArrow"></span> </section> </div> <div class="message-cell message-cell--main"> <div class="message-main js-quickEditTarget"> <header class="message-attribution message-attribution--split"> <ul class="message-attribution-main listInline "> <li class="u-concealed"> <a href="/threads/will-this-circuit-work.165495/post-1444036" rel="nofollow" itemprop="url"> <time class="u-dt" dir="auto" datetime="2023-11-09T16:57:01-0800" data-time="1699577821" data-date-string="Nov 9, 2023" data-time-string="4:57 PM" title="Nov 9, 2023 at 4:57 PM" itemprop="datePublished">Nov 9, 2023</time> </a> </li> </ul> <ul class="message-attribution-opposite message-attribution-opposite--list "> <li> <a href="/threads/will-this-circuit-work.165495/post-1444036" class="message-attribution-gadget" data-xf-init="share-tooltip" data-href="/posts/1444036/share" aria-label="Share" rel="nofollow"> <i class="fa--xf fal fa-share-alt" aria-hidden="true"></i> </a> </li> <li> <a href="/threads/will-this-circuit-work.165495/post-1444036" rel="nofollow"> #5 </a> </li> </ul> </header> <div class="message-content js-messageContent"> <div class="message-userContent lbContainer js-lbContainer " data-lb-id="post-1444036" data-lb-caption-desc="gary350 · Nov 9, 2023 at 4:57 PM"> <article class="message-body js-selectToQuote"> <div itemprop="text"> <div class="bbWrapper">More generic info on buzzer. <a href="https://www.wellpcb.com/buzzer-datasheet.html" target="_blank" class="link link--external" rel="nofollow ugc noopener">https://www.wellpcb.com/buzzer-datasheet.html</a><br /> <br /> If I could find a REAL data sheet it will be very helpful.</div> </div> <div class="js-selectToQuoteEnd"> </div> </article> </div> </div> <footer class="message-footer"> <div class="message-microdata" itemprop="interactionStatistic" itemtype="https://schema.org/InteractionCounter" itemscope> <meta itemprop="userInteractionCount" content="0" /> <meta itemprop="interactionType" content="https://schema.org/LikeAction" /> </div> <div class="reactionsBar js-reactionsList "> </div> <div class="js-historyTarget message-historyTarget toggleTarget" data-href="trigger-href"></div> </footer> </div> </div> </div> </article> <article class="message message--post js-post js-inlineModContainer " data-author="gary350" data-content="post-1444037" id="js-post-1444037" itemscope itemtype="https://schema.org/Comment" itemid="https://www.electro-tech-online.com/posts/1444037/"> <meta itemprop="parentItem" itemscope itemid="https://www.electro-tech-online.com/threads/will-this-circuit-work.165495/" /> <span class="u-anchorTarget" id="post-1444037"></span> <div class="message-inner"> <div class="message-cell message-cell--user"> <section class="message-user" itemprop="author" itemscope itemtype="https://schema.org/Person" itemid="https://www.electro-tech-online.com/members/gary350.35041/"> <meta itemprop="url" content="https://www.electro-tech-online.com/members/gary350.35041/" /> <div class="message-avatar "> <div class="message-avatar-wrapper"> <a href="/members/gary350.35041/" class="avatar avatar--m avatar--default avatar--default--dynamic" data-user-id="35041" data-xf-init="member-tooltip" style="background-color: #33cc8f; color: #0f3d2b"> <span class="avatar-u35041-m" role="img" aria-label="gary350">G</span> </a> </div> </div> <div class="message-userDetails"> <h4 class="message-name"><a href="/members/gary350.35041/" class="username " dir="auto" data-user-id="35041" data-xf-init="member-tooltip"><span itemprop="name">gary350</span></a></h4> <h5 class="userTitle message-userTitle" dir="auto" itemprop="jobTitle">Well-Known Member</h5> </div> <span class="message-userArrow"></span> </section> </div> <div class="message-cell message-cell--main"> <div class="message-main js-quickEditTarget"> <header class="message-attribution message-attribution--split"> <ul class="message-attribution-main listInline "> <li class="u-concealed"> <a href="/threads/will-this-circuit-work.165495/post-1444037" rel="nofollow" itemprop="url"> <time class="u-dt" dir="auto" datetime="2023-11-09T17:06:00-0800" data-time="1699578360" data-date-string="Nov 9, 2023" data-time-string="5:06 PM" title="Nov 9, 2023 at 5:06 PM" itemprop="datePublished">Nov 9, 2023</time> </a> </li> </ul> <ul class="message-attribution-opposite message-attribution-opposite--list "> <li> <a href="/threads/will-this-circuit-work.165495/post-1444037" class="message-attribution-gadget" data-xf-init="share-tooltip" data-href="/posts/1444037/share" aria-label="Share" rel="nofollow"> <i class="fa--xf fal fa-share-alt" aria-hidden="true"></i> </a> </li> <li> <a href="/threads/will-this-circuit-work.165495/post-1444037" rel="nofollow"> #6 </a> </li> </ul> </header> <div class="message-content js-messageContent"> <div class="message-userContent lbContainer js-lbContainer " data-lb-id="post-1444037" data-lb-caption-desc="gary350 · Nov 9, 2023 at 5:06 PM"> <article class="message-body js-selectToQuote"> <div itemprop="text"> <div class="bbWrapper">UP Date. I found a real buzzer data sheet. These are 30V. <br /> <br /> Is there really a 3 to 5 volt buzzer some where or is google wrong?<br /> <br /> <div> <a href="https://product.tdk.com/en/system/files?file=dam/doc/product/sw_piezo/sw_piezo/piezo-buzzer/catalog/piezoelectronic_buzzer_ps_en.pdf" class="link link--external" target="_blank" rel="nofollow ugc noopener" data-proxy-href=""> https://product.tdk.com/en/system/files?file=dam/doc/product/sw_piezo/sw_piezo/piezo-buzzer/catalog/piezoelectronic_buzzer_ps_en.pdf </a> </div></div> </div> <div class="js-selectToQuoteEnd"> </div> </article> </div> </div> <footer class="message-footer"> <div class="message-microdata" itemprop="interactionStatistic" itemtype="https://schema.org/InteractionCounter" itemscope> <meta itemprop="userInteractionCount" content="0" /> <meta itemprop="interactionType" content="https://schema.org/LikeAction" /> </div> <div class="reactionsBar js-reactionsList "> </div> <div class="js-historyTarget message-historyTarget toggleTarget" data-href="trigger-href"></div> </footer> </div> </div> </div> </article> <article class="message message--post js-post js-inlineModContainer " data-author="AnalogKid" data-content="post-1444038" id="js-post-1444038" itemscope itemtype="https://schema.org/Comment" itemid="https://www.electro-tech-online.com/posts/1444038/"> <meta itemprop="parentItem" itemscope itemid="https://www.electro-tech-online.com/threads/will-this-circuit-work.165495/" /> <span class="u-anchorTarget" id="post-1444038"></span> <div class="message-inner"> <div class="message-cell message-cell--user"> <section class="message-user" itemprop="author" itemscope itemtype="https://schema.org/Person" itemid="https://www.electro-tech-online.com/members/analogkid.175399/"> <meta itemprop="url" content="https://www.electro-tech-online.com/members/analogkid.175399/" /> <div class="message-avatar "> <div class="message-avatar-wrapper"> <a href="/members/analogkid.175399/" class="avatar avatar--m" data-user-id="175399" data-xf-init="member-tooltip"> <img src="/data/avatars/m/175/175399.jpg?1432320227" alt="AnalogKid" class="avatar-u175399-m" width="96" height="96" loading="lazy" itemprop="image" /> </a> </div> </div> <div class="message-userDetails"> <h4 class="message-name"><a href="/members/analogkid.175399/" class="username " dir="auto" data-user-id="175399" data-xf-init="member-tooltip"><span itemprop="name">AnalogKid</span></a></h4> <h5 class="userTitle message-userTitle" dir="auto" itemprop="jobTitle">Well-Known Member</h5> <div class="userBanner userBanner userBanner--gray message-userBanner" itemprop="jobTitle"><span class="userBanner-before"></span><strong>Most Helpful Member</strong><span class="userBanner-after"></span></div> </div> <span class="message-userArrow"></span> </section> </div> <div class="message-cell message-cell--main"> <div class="message-main js-quickEditTarget"> <header class="message-attribution message-attribution--split"> <ul class="message-attribution-main listInline "> <li class="u-concealed"> <a href="/threads/will-this-circuit-work.165495/post-1444038" rel="nofollow" itemprop="url"> <time class="u-dt" dir="auto" datetime="2023-11-09T17:16:01-0800" data-time="1699578961" data-date-string="Nov 9, 2023" data-time-string="5:16 PM" title="Nov 9, 2023 at 5:16 PM" itemprop="datePublished">Nov 9, 2023</time> </a> </li> </ul> <ul class="message-attribution-opposite message-attribution-opposite--list "> <li> <a href="/threads/will-this-circuit-work.165495/post-1444038" class="message-attribution-gadget" data-xf-init="share-tooltip" data-href="/posts/1444038/share" aria-label="Share" rel="nofollow"> <i class="fa--xf fal fa-share-alt" aria-hidden="true"></i> </a> </li> <li> <a href="/threads/will-this-circuit-work.165495/post-1444038" rel="nofollow"> #7 </a> </li> </ul> </header> <div class="message-content js-messageContent"> <div class="message-userContent lbContainer js-lbContainer " data-lb-id="post-1444038" data-lb-caption-desc="AnalogKid · Nov 9, 2023 at 5:16 PM"> <article class="message-body js-selectToQuote"> <div itemprop="text"> <div class="bbWrapper">The battery voltage is way too low. Use some arithmetic to see what the minimum battery voltage has to be. Hint: 3 V is not enough.<br /> <br /> ak</div> </div> <div class="js-selectToQuoteEnd"> </div> </article> </div> <aside class="message-signature"> <div class="bbWrapper">Maslow Antagonist</div> </aside> </div> <footer class="message-footer"> <div class="message-microdata" itemprop="interactionStatistic" itemtype="https://schema.org/InteractionCounter" itemscope> <meta itemprop="userInteractionCount" content="1" /> <meta itemprop="interactionType" content="https://schema.org/LikeAction" /> </div> <div class="reactionsBar js-reactionsList is-active"> <ul class="reactionSummary"> <li><span class="reaction reaction--small reaction--1" data-reaction-id="1"><i aria-hidden="true"></i><img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="reaction-sprite js-reaction" alt="Like" title="Like" /></span></li> </ul> <span class="u-srOnly">Reactions:</span> <a class="reactionsBar-link" href="/posts/1444038/reactions" data-xf-click="overlay" data-cache="false" rel="nofollow"><bdi>rjenkinsgb</bdi></a> </div> <div class="js-historyTarget message-historyTarget toggleTarget" data-href="trigger-href"></div> </footer> </div> </div> </div> </article> <article class="message message--post js-post js-inlineModContainer " data-author="For The Popcorn" data-content="post-1444039" id="js-post-1444039" itemscope itemtype="https://schema.org/Comment" itemid="https://www.electro-tech-online.com/posts/1444039/"> <meta itemprop="parentItem" itemscope itemid="https://www.electro-tech-online.com/threads/will-this-circuit-work.165495/" /> <span class="u-anchorTarget" id="post-1444039"></span> <div class="message-inner"> <div class="message-cell message-cell--user"> <section class="message-user" itemprop="author" itemscope itemtype="https://schema.org/Person" itemid="https://www.electro-tech-online.com/members/for-the-popcorn.315620/"> <meta itemprop="url" content="https://www.electro-tech-online.com/members/for-the-popcorn.315620/" /> <div class="message-avatar "> <div class="message-avatar-wrapper"> <a href="/members/for-the-popcorn.315620/" class="avatar avatar--m avatar--default avatar--default--dynamic" data-user-id="315620" data-xf-init="member-tooltip" style="background-color: #0f0f3d; color: #3333cc"> <span class="avatar-u315620-m" role="img" aria-label="For The Popcorn">F</span> </a> </div> </div> <div class="message-userDetails"> <h4 class="message-name"><a href="/members/for-the-popcorn.315620/" class="username " dir="auto" data-user-id="315620" data-xf-init="member-tooltip"><span itemprop="name">For The Popcorn</span></a></h4> <h5 class="userTitle message-userTitle" dir="auto" itemprop="jobTitle">Well-Known Member</h5> <div class="userBanner userBanner userBanner--gray message-userBanner" itemprop="jobTitle"><span class="userBanner-before"></span><strong>Most Helpful Member</strong><span class="userBanner-after"></span></div> </div> <span class="message-userArrow"></span> </section> </div> <div class="message-cell message-cell--main"> <div class="message-main js-quickEditTarget"> <header class="message-attribution message-attribution--split"> <ul class="message-attribution-main listInline "> <li class="u-concealed"> <a href="/threads/will-this-circuit-work.165495/post-1444039" rel="nofollow" itemprop="url"> <time class="u-dt" dir="auto" datetime="2023-11-09T19:15:01-0800" data-time="1699586101" data-date-string="Nov 9, 2023" data-time-string="7:15 PM" title="Nov 9, 2023 at 7:15 PM" itemprop="datePublished">Nov 9, 2023</time> </a> </li> </ul> <ul class="message-attribution-opposite message-attribution-opposite--list "> <li> <a href="/threads/will-this-circuit-work.165495/post-1444039" class="message-attribution-gadget" data-xf-init="share-tooltip" data-href="/posts/1444039/share" aria-label="Share" rel="nofollow"> <i class="fa--xf fal fa-share-alt" aria-hidden="true"></i> </a> </li> <li> <a href="/threads/will-this-circuit-work.165495/post-1444039" rel="nofollow"> #8 </a> </li> </ul> </header> <div class="message-content js-messageContent"> <div class="message-userContent lbContainer js-lbContainer " data-lb-id="post-1444039" data-lb-caption-desc="For The Popcorn · Nov 9, 2023 at 7:15 PM"> <article class="message-body js-selectToQuote"> <div itemprop="text"> <div class="bbWrapper">I would suggest the following parts, available from Tayda Electronics. <br /> <br /> Start with a red or orange flashing LED - Vf is ~ 2 volts, 20mA max. Flash rate is 1.5Hz.<br /> <br /> This piezo beeper works from as little as 1.5 volts, 10 mA max.<br /> <br /> You may need to use three Dollar Store batteries....you're still a bit short with 2 batteries.<br /> <br /> I'm not sure if flashing LEDs are internally current limited, so a series resistor may be needed.<br /> <br /> <div class="bbImageWrapper js-lbImage" title="SmartSelect_20231109_184816_Edge.jpg" data-src="https://www.electro-tech-online.com/attachments/smartselect_20231109_184816_edge-jpg.143278/" data-lb-sidebar-href="" data-lb-caption-extra-html="" data-single-image="1"> <img src="https://www.electro-tech-online.com/attachments/smartselect_20231109_184816_edge-jpg.143278/" data-url="" class="bbImage" data-zoom-target="1" style="" alt="SmartSelect_20231109_184816_Edge.jpg" title="SmartSelect_20231109_184816_Edge.jpg" width="1070" height="1285" loading="lazy" /> </div><div class="bbImageWrapper js-lbImage" title="SmartSelect_20231109_185913_Edge.jpg" data-src="https://www.electro-tech-online.com/attachments/smartselect_20231109_185913_edge-jpg.143279/" data-lb-sidebar-href="" data-lb-caption-extra-html="" data-single-image="1"> <img src="https://www.electro-tech-online.com/attachments/smartselect_20231109_185913_edge-jpg.143279/" data-url="" class="bbImage" data-zoom-target="1" style="" alt="SmartSelect_20231109_185913_Edge.jpg" title="SmartSelect_20231109_185913_Edge.jpg" width="1078" height="678" loading="lazy" /> </div><div class="bbImageWrapper js-lbImage" title="Screenshot_20231109_185534_Edge.jpg" data-src="https://www.electro-tech-online.com/attachments/screenshot_20231109_185534_edge-jpg.143280/" data-lb-sidebar-href="" data-lb-caption-extra-html="" data-single-image="1"> <img src="https://www.electro-tech-online.com/attachments/screenshot_20231109_185534_edge-jpg.143280/" data-url="" class="bbImage" data-zoom-target="1" style="" alt="Screenshot_20231109_185534_Edge.jpg" title="Screenshot_20231109_185534_Edge.jpg" width="1080" height="1843" loading="lazy" /> </div><div class="bbImageWrapper js-lbImage" title="SmartSelect_20231109_185608_Edge.jpg" data-src="https://www.electro-tech-online.com/attachments/smartselect_20231109_185608_edge-jpg.143281/" data-lb-sidebar-href="" data-lb-caption-extra-html="" data-single-image="1"> <img src="https://www.electro-tech-online.com/attachments/smartselect_20231109_185608_edge-jpg.143281/" data-url="" class="bbImage" data-zoom-target="1" style="" alt="SmartSelect_20231109_185608_Edge.jpg" title="SmartSelect_20231109_185608_Edge.jpg" width="1076" height="1201" loading="lazy" /> </div></div> </div> <div class="js-selectToQuoteEnd"> </div> </article> </div> <aside class="message-signature"> <div class="bbWrapper">Please visit Jon's Imaginarium at jons.fyi for tips, ideas, reference info and a lot more about electronics, laser cutting and other stuff.</div> </aside> </div> <footer class="message-footer"> <div class="message-microdata" itemprop="interactionStatistic" itemtype="https://schema.org/InteractionCounter" itemscope> <meta itemprop="userInteractionCount" content="0" /> <meta itemprop="interactionType" content="https://schema.org/LikeAction" /> </div> <div class="reactionsBar js-reactionsList "> </div> <div class="js-historyTarget message-historyTarget toggleTarget" data-href="trigger-href"></div> </footer> </div> </div> </div> </article> <article class="message message--post js-post js-inlineModContainer " data-author="audioguru" data-content="post-1444065" id="js-post-1444065" itemscope itemtype="https://schema.org/Comment" itemid="https://www.electro-tech-online.com/posts/1444065/"> <meta itemprop="parentItem" itemscope itemid="https://www.electro-tech-online.com/threads/will-this-circuit-work.165495/" /> <span class="u-anchorTarget" id="post-1444065"></span> <div class="message-inner"> <div class="message-cell message-cell--user"> <section class="message-user" itemprop="author" itemscope itemtype="https://schema.org/Person" itemid="https://www.electro-tech-online.com/members/audioguru.16360/"> <meta itemprop="url" content="https://www.electro-tech-online.com/members/audioguru.16360/" /> <div class="message-avatar "> <div class="message-avatar-wrapper"> <a href="/members/audioguru.16360/" class="avatar avatar--m" data-user-id="16360" data-xf-init="member-tooltip"> <img src="/data/avatars/m/16/16360.jpg?1386438875" srcset="/data/avatars/l/16/16360.jpg?1386438875 2x" alt="audioguru" class="avatar-u16360-m" width="96" height="96" loading="lazy" itemprop="image" /> </a> </div> </div> <div class="message-userDetails"> <h4 class="message-name"><a href="/members/audioguru.16360/" class="username " dir="auto" data-user-id="16360" data-xf-init="member-tooltip"><span itemprop="name">audioguru</span></a></h4> <h5 class="userTitle message-userTitle" dir="auto" itemprop="jobTitle">Well-Known Member</h5> <div class="userBanner userBanner userBanner--gray message-userBanner" itemprop="jobTitle"><span class="userBanner-before"></span><strong>Most Helpful Member</strong><span class="userBanner-after"></span></div> </div> <span class="message-userArrow"></span> </section> </div> <div class="message-cell message-cell--main"> <div class="message-main js-quickEditTarget"> <header class="message-attribution message-attribution--split"> <ul class="message-attribution-main listInline "> <li class="u-concealed"> <a href="/threads/will-this-circuit-work.165495/post-1444065" rel="nofollow" itemprop="url"> <time class="u-dt" dir="auto" datetime="2023-11-10T09:45:58-0800" data-time="1699638358" data-date-string="Nov 10, 2023" data-time-string="9:45 AM" title="Nov 10, 2023 at 9:45 AM" itemprop="datePublished">Nov 10, 2023</time> </a> </li> </ul> <ul class="message-attribution-opposite message-attribution-opposite--list "> <li> <a href="/threads/will-this-circuit-work.165495/post-1444065" class="message-attribution-gadget" data-xf-init="share-tooltip" data-href="/posts/1444065/share" aria-label="Share" rel="nofollow"> <i class="fa--xf fal fa-share-alt" aria-hidden="true"></i> </a> </li> <li> <a href="/threads/will-this-circuit-work.165495/post-1444065" rel="nofollow"> #9 </a> </li> </ul> </header> <div class="message-content js-messageContent"> <div class="message-userContent lbContainer js-lbContainer " data-lb-id="post-1444065" data-lb-caption-desc="audioguru · Nov 10, 2023 at 9:45 AM"> <article class="message-body js-selectToQuote"> <div itemprop="text"> <div class="bbWrapper">Gary, the Meanwell "buzzer" sales sheet says their buzzers are "active that beeps" or are "ready made that beeps". It is Chinglish and is meaningless.<br /> If you use an electro-mechanical buzzer or a name-brand piezo beeper that has an internal oscillator then it will not get any voltage from a 3V battery in series with an LED because the battery voltage is too low.<br /> <br /> A red or orange LED can be used as a warning. Therefore some are made to be flashing. A blue LED is never used as a warning therefor none are made to be flashing.<br /> <br /> Depending on the type of buzzer or beeper, the LED will need a series or parallel current-limiting resistor.</div> </div> <div class="js-selectToQuoteEnd"> </div> </article> </div> <aside class="message-signature"> <div class="bbWrapper">Uncle $crooge</div> </aside> </div> <footer class="message-footer"> <div class="message-microdata" itemprop="interactionStatistic" itemtype="https://schema.org/InteractionCounter" itemscope> <meta itemprop="userInteractionCount" content="0" /> <meta itemprop="interactionType" content="https://schema.org/LikeAction" /> </div> <div class="reactionsBar js-reactionsList "> </div> <div class="js-historyTarget message-historyTarget toggleTarget" data-href="trigger-href"></div> </footer> </div> </div> </div> </article> <article class="message message--post js-post js-inlineModContainer " data-author="For The Popcorn" data-content="post-1444070" id="js-post-1444070" itemscope itemtype="https://schema.org/Comment" itemid="https://www.electro-tech-online.com/posts/1444070/"> <meta itemprop="parentItem" itemscope itemid="https://www.electro-tech-online.com/threads/will-this-circuit-work.165495/" /> <span class="u-anchorTarget" id="post-1444070"></span> <div class="message-inner"> <div class="message-cell message-cell--user"> <section class="message-user" itemprop="author" itemscope itemtype="https://schema.org/Person" itemid="https://www.electro-tech-online.com/members/for-the-popcorn.315620/"> <meta itemprop="url" content="https://www.electro-tech-online.com/members/for-the-popcorn.315620/" /> <div class="message-avatar "> <div class="message-avatar-wrapper"> <a href="/members/for-the-popcorn.315620/" class="avatar avatar--m avatar--default avatar--default--dynamic" data-user-id="315620" data-xf-init="member-tooltip" style="background-color: #0f0f3d; color: #3333cc"> <span class="avatar-u315620-m" role="img" aria-label="For The Popcorn">F</span> </a> </div> </div> <div class="message-userDetails"> <h4 class="message-name"><a href="/members/for-the-popcorn.315620/" class="username " dir="auto" data-user-id="315620" data-xf-init="member-tooltip"><span itemprop="name">For The Popcorn</span></a></h4> <h5 class="userTitle message-userTitle" dir="auto" itemprop="jobTitle">Well-Known Member</h5> <div class="userBanner userBanner userBanner--gray message-userBanner" itemprop="jobTitle"><span class="userBanner-before"></span><strong>Most Helpful Member</strong><span class="userBanner-after"></span></div> </div> <span class="message-userArrow"></span> </section> </div> <div class="message-cell message-cell--main"> <div class="message-main js-quickEditTarget"> <header class="message-attribution message-attribution--split"> <ul class="message-attribution-main listInline "> <li class="u-concealed"> <a href="/threads/will-this-circuit-work.165495/post-1444070" rel="nofollow" itemprop="url"> <time class="u-dt" dir="auto" datetime="2023-11-10T10:05:41-0800" data-time="1699639541" data-date-string="Nov 10, 2023" data-time-string="10:05 AM" title="Nov 10, 2023 at 10:05 AM" itemprop="datePublished">Nov 10, 2023</time> </a> </li> </ul> <ul class="message-attribution-opposite message-attribution-opposite--list "> <li> <a href="/threads/will-this-circuit-work.165495/post-1444070" class="message-attribution-gadget" data-xf-init="share-tooltip" data-href="/posts/1444070/share" aria-label="Share" rel="nofollow"> <i class="fa--xf fal fa-share-alt" aria-hidden="true"></i> </a> </li> <li> <a href="/threads/will-this-circuit-work.165495/post-1444070" rel="nofollow"> #10 </a> </li> </ul> </header> <div class="message-content js-messageContent"> <div class="message-userContent lbContainer js-lbContainer " data-lb-id="post-1444070" data-lb-caption-desc="For The Popcorn · Nov 10, 2023 at 10:05 AM"> <article class="message-body js-selectToQuote"> <div itemprop="text"> <div class="bbWrapper"><blockquote data-attributes="member: 16360" data-quote="audioguru" data-source="post: 1444065" class="bbCodeBlock bbCodeBlock--expandable bbCodeBlock--quote js-expandWatch"> <div class="bbCodeBlock-title"> <a href="/goto/post?id=1444065" class="bbCodeBlock-sourceJump" rel="nofollow" data-xf-click="attribution" data-content-selector="#post-1444065">audioguru said:</a> </div> <div class="bbCodeBlock-content"> <div class="bbCodeBlock-expandContent js-expandContent "> A blue LED is never used as a warning therefor none are made to be flashing </div> <div class="bbCodeBlock-expandLink js-expandLink"><a role="button" tabindex="0">Click to expand...</a></div> </div> </blockquote><br /> Do you just make this stuff up? Blue, white, red, orange, yellow and green flashing LEDs are common as fly poop.<br /> <br /> <a href="https://www.electro-tech-online.com/attachments/screenshot_20231110_100229_edge-jpg.143292/" target="_blank" class="js-lbImage" data-lb-sidebar-href="" data-lb-caption-extra-html=""><img src="https://www.electro-tech-online.com/data/attachments/132/132253-ac542e4cec212c86d15fa7d4ae07e248.jpg" class="bbImage " style="" alt="Screenshot_20231110_100229_Edge.jpg" title="Screenshot_20231110_100229_Edge.jpg" width="100" height="364" loading="lazy" /></a></div> </div> <div class="js-selectToQuoteEnd"> </div> </article> </div> <aside class="message-signature"> <div class="bbWrapper">Please visit Jon's Imaginarium at jons.fyi for tips, ideas, reference info and a lot more about electronics, laser cutting and other stuff.</div> </aside> </div> <footer class="message-footer"> <div class="message-microdata" itemprop="interactionStatistic" itemtype="https://schema.org/InteractionCounter" 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data-content="post-1444072" id="js-post-1444072" itemscope itemtype="https://schema.org/Comment" itemid="https://www.electro-tech-online.com/posts/1444072/"> <meta itemprop="parentItem" itemscope itemid="https://www.electro-tech-online.com/threads/will-this-circuit-work.165495/" /> <span class="u-anchorTarget" id="post-1444072"></span> <div class="message-inner"> <div class="message-cell message-cell--user"> <section class="message-user" itemprop="author" itemscope itemtype="https://schema.org/Person" itemid="https://www.electro-tech-online.com/members/audioguru.16360/"> <meta itemprop="url" content="https://www.electro-tech-online.com/members/audioguru.16360/" /> <div class="message-avatar "> <div class="message-avatar-wrapper"> <a href="/members/audioguru.16360/" class="avatar avatar--m" data-user-id="16360" data-xf-init="member-tooltip"> <img src="/data/avatars/m/16/16360.jpg?1386438875" srcset="/data/avatars/l/16/16360.jpg?1386438875 2x" alt="audioguru" class="avatar-u16360-m" width="96" height="96" loading="lazy" itemprop="image" /> </a> </div> </div> <div class="message-userDetails"> <h4 class="message-name"><a href="/members/audioguru.16360/" class="username " dir="auto" data-user-id="16360" data-xf-init="member-tooltip"><span itemprop="name">audioguru</span></a></h4> <h5 class="userTitle message-userTitle" dir="auto" itemprop="jobTitle">Well-Known Member</h5> <div class="userBanner userBanner userBanner--gray message-userBanner" itemprop="jobTitle"><span class="userBanner-before"></span><strong>Most Helpful Member</strong><span class="userBanner-after"></span></div> </div> <span class="message-userArrow"></span> </section> </div> <div class="message-cell message-cell--main"> <div class="message-main js-quickEditTarget"> <header class="message-attribution message-attribution--split"> <ul class="message-attribution-main listInline "> <li class="u-concealed"> <a href="/threads/will-this-circuit-work.165495/post-1444072" rel="nofollow" itemprop="url"> <time class="u-dt" dir="auto" datetime="2023-11-10T10:27:09-0800" data-time="1699640829" data-date-string="Nov 10, 2023" data-time-string="10:27 AM" title="Nov 10, 2023 at 10:27 AM" itemprop="datePublished">Nov 10, 2023</time> </a> </li> </ul> <ul class="message-attribution-opposite message-attribution-opposite--list "> <li> <a href="/threads/will-this-circuit-work.165495/post-1444072" class="message-attribution-gadget" data-xf-init="share-tooltip" data-href="/posts/1444072/share" aria-label="Share" rel="nofollow"> <i class="fa--xf fal fa-share-alt" aria-hidden="true"></i> </a> </li> <li> <a href="/threads/will-this-circuit-work.165495/post-1444072" rel="nofollow"> #11 </a> </li> </ul> </header> <div class="message-content js-messageContent"> <div class="message-userContent lbContainer js-lbContainer " data-lb-id="post-1444072" data-lb-caption-desc="audioguru · Nov 10, 2023 at 10:27 AM"> <article class="message-body js-selectToQuote"> <div itemprop="text"> <div class="bbWrapper">I don't buy cheap junk ($0.03 for an LED) from a "seller" on ebay, AliExpress or Amazon.</div> </div> <div class="js-selectToQuoteEnd"> </div> </article> </div> <aside class="message-signature"> <div class="bbWrapper">Uncle $crooge</div> </aside> </div> <footer class="message-footer"> <div class="message-microdata" itemprop="interactionStatistic" itemtype="https://schema.org/InteractionCounter" itemscope> <meta itemprop="userInteractionCount" content="0" /> <meta itemprop="interactionType" content="https://schema.org/LikeAction" /> </div> <div class="reactionsBar js-reactionsList "> </div> <div class="js-historyTarget message-historyTarget toggleTarget" data-href="trigger-href"></div> </footer> </div> </div> </div> </article> <article class="message message--post js-post js-inlineModContainer " data-author="For The Popcorn" data-content="post-1444073" id="js-post-1444073" itemscope itemtype="https://schema.org/Comment" itemid="https://www.electro-tech-online.com/posts/1444073/"> <meta itemprop="parentItem" itemscope itemid="https://www.electro-tech-online.com/threads/will-this-circuit-work.165495/" /> <span class="u-anchorTarget" id="post-1444073"></span> <div class="message-inner"> <div class="message-cell message-cell--user"> <section class="message-user" itemprop="author" itemscope itemtype="https://schema.org/Person" itemid="https://www.electro-tech-online.com/members/for-the-popcorn.315620/"> <meta itemprop="url" content="https://www.electro-tech-online.com/members/for-the-popcorn.315620/" /> <div class="message-avatar "> <div class="message-avatar-wrapper"> <a href="/members/for-the-popcorn.315620/" class="avatar avatar--m avatar--default avatar--default--dynamic" data-user-id="315620" data-xf-init="member-tooltip" style="background-color: #0f0f3d; color: #3333cc"> <span class="avatar-u315620-m" role="img" aria-label="For The Popcorn">F</span> </a> </div> </div> <div class="message-userDetails"> <h4 class="message-name"><a href="/members/for-the-popcorn.315620/" class="username " dir="auto" data-user-id="315620" data-xf-init="member-tooltip"><span itemprop="name">For The Popcorn</span></a></h4> <h5 class="userTitle message-userTitle" dir="auto" itemprop="jobTitle">Well-Known Member</h5> <div class="userBanner userBanner userBanner--gray message-userBanner" itemprop="jobTitle"><span class="userBanner-before"></span><strong>Most Helpful Member</strong><span class="userBanner-after"></span></div> </div> <span class="message-userArrow"></span> </section> </div> <div class="message-cell message-cell--main"> <div class="message-main js-quickEditTarget"> <header class="message-attribution message-attribution--split"> <ul class="message-attribution-main listInline "> <li class="u-concealed"> <a href="/threads/will-this-circuit-work.165495/post-1444073" rel="nofollow" itemprop="url"> <time class="u-dt" dir="auto" datetime="2023-11-10T10:42:12-0800" data-time="1699641732" data-date-string="Nov 10, 2023" data-time-string="10:42 AM" title="Nov 10, 2023 at 10:42 AM" itemprop="datePublished">Nov 10, 2023</time> </a> </li> </ul> <ul class="message-attribution-opposite message-attribution-opposite--list "> <li> <a href="/threads/will-this-circuit-work.165495/post-1444073" class="message-attribution-gadget" data-xf-init="share-tooltip" data-href="/posts/1444073/share" aria-label="Share" rel="nofollow"> <i class="fa--xf fal fa-share-alt" aria-hidden="true"></i> </a> </li> <li> <a href="/threads/will-this-circuit-work.165495/post-1444073" rel="nofollow"> #12 </a> </li> </ul> </header> <div class="message-content js-messageContent"> <div class="message-userContent lbContainer js-lbContainer " data-lb-id="post-1444073" data-lb-caption-desc="For The Popcorn · Nov 10, 2023 at 10:42 AM"> <article class="message-body js-selectToQuote"> <div itemprop="text"> <div class="bbWrapper">That doesn't change the FACT that your declaration is wrong.<br /> <br /> <blockquote data-attributes="member: 16360" data-quote="audioguru" data-source="post: 1444065" class="bbCodeBlock bbCodeBlock--expandable bbCodeBlock--quote js-expandWatch"> <div class="bbCodeBlock-title"> <a href="/goto/post?id=1444065" class="bbCodeBlock-sourceJump" rel="nofollow" data-xf-click="attribution" data-content-selector="#post-1444065">audioguru said:</a> </div> <div class="bbCodeBlock-content"> <div class="bbCodeBlock-expandContent js-expandContent "> A blue LED is never used as a warning therefor none are made to be flashing </div> <div class="bbCodeBlock-expandLink js-expandLink"><a role="button" tabindex="0">Click to expand...</a></div> </div> </blockquote><br /> Also, for the record, I have purchased many parts from Tayda Electronics. All as described and high quality. Except for one order of terminal blocks where their definition of "vertical" vs "horizontal" didn't match mine, and the promptly sent the correct parts.<br /> <br /> Yeah, I suppose Chinese sellers won't take a check (cheque?) to purchase parts.</div> </div> <div class="js-selectToQuoteEnd"> </div> </article> </div> <aside class="message-signature"> <div class="bbWrapper">Please visit Jon's Imaginarium at jons.fyi for tips, ideas, reference info and a lot more about electronics, laser cutting and other stuff.</div> </aside> </div> <footer class="message-footer"> <div class="message-microdata" itemprop="interactionStatistic" itemtype="https://schema.org/InteractionCounter" itemscope> <meta itemprop="userInteractionCount" content="2" /> <meta itemprop="interactionType" content="https://schema.org/LikeAction" /> </div> <div class="reactionsBar js-reactionsList is-active"> <ul class="reactionSummary"> <li><span class="reaction reaction--small reaction--1" data-reaction-id="1"><i 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class="message-inner"> <div class="message-cell message-cell--user"> <section class="message-user" itemprop="author" itemscope itemtype="https://schema.org/Person" itemid="https://www.electro-tech-online.com/members/analogkid.175399/"> <meta itemprop="url" content="https://www.electro-tech-online.com/members/analogkid.175399/" /> <div class="message-avatar "> <div class="message-avatar-wrapper"> <a href="/members/analogkid.175399/" class="avatar avatar--m" data-user-id="175399" data-xf-init="member-tooltip"> <img src="/data/avatars/m/175/175399.jpg?1432320227" alt="AnalogKid" class="avatar-u175399-m" width="96" height="96" loading="lazy" itemprop="image" /> </a> </div> </div> <div class="message-userDetails"> <h4 class="message-name"><a href="/members/analogkid.175399/" class="username " dir="auto" data-user-id="175399" data-xf-init="member-tooltip"><span itemprop="name">AnalogKid</span></a></h4> <h5 class="userTitle message-userTitle" dir="auto" itemprop="jobTitle">Well-Known Member</h5> <div class="userBanner userBanner userBanner--gray message-userBanner" itemprop="jobTitle"><span class="userBanner-before"></span><strong>Most Helpful Member</strong><span class="userBanner-after"></span></div> </div> <span class="message-userArrow"></span> </section> </div> <div class="message-cell message-cell--main"> <div class="message-main js-quickEditTarget"> <header class="message-attribution message-attribution--split"> <ul class="message-attribution-main listInline "> <li class="u-concealed"> <a href="/threads/will-this-circuit-work.165495/post-1444084" rel="nofollow" itemprop="url"> <time class="u-dt" dir="auto" datetime="2023-11-10T13:27:40-0800" data-time="1699651660" data-date-string="Nov 10, 2023" data-time-string="1:27 PM" title="Nov 10, 2023 at 1:27 PM" itemprop="datePublished">Nov 10, 2023</time> </a> </li> </ul> <ul class="message-attribution-opposite message-attribution-opposite--list "> <li> <a href="/threads/will-this-circuit-work.165495/post-1444084" class="message-attribution-gadget" data-xf-init="share-tooltip" data-href="/posts/1444084/share" aria-label="Share" rel="nofollow"> <i class="fa--xf fal fa-share-alt" aria-hidden="true"></i> </a> </li> <li> <a href="/threads/will-this-circuit-work.165495/post-1444084" rel="nofollow"> #13 </a> </li> </ul> </header> <div class="message-content js-messageContent"> <div class="message-userContent lbContainer js-lbContainer " data-lb-id="post-1444084" data-lb-caption-desc="AnalogKid · Nov 10, 2023 at 1:27 PM"> <article class="message-body js-selectToQuote"> <div itemprop="text"> <div class="bbWrapper"><blockquote data-attributes="member: 16360" data-quote="audioguru" data-source="post: 1444065" class="bbCodeBlock bbCodeBlock--expandable bbCodeBlock--quote js-expandWatch"> <div class="bbCodeBlock-title"> <a href="/goto/post?id=1444065" class="bbCodeBlock-sourceJump" rel="nofollow" data-xf-click="attribution" data-content-selector="#post-1444065">audioguru said:</a> </div> <div class="bbCodeBlock-content"> <div class="bbCodeBlock-expandContent js-expandContent "> A blue LED is never used as a warning </div> <div class="bbCodeBlock-expandLink js-expandLink"><a role="button" tabindex="0">Click to expand...</a></div> </div> </blockquote>Except for the ones on my range and my furnace.<br /> <br /> ak</div> </div> <div class="js-selectToQuoteEnd"> </div> </article> </div> <aside class="message-signature"> <div class="bbWrapper">Maslow Antagonist</div> </aside> </div> <footer class="message-footer"> <div class="message-microdata" itemprop="interactionStatistic" itemtype="https://schema.org/InteractionCounter" itemscope> <meta itemprop="userInteractionCount" content="0" /> <meta itemprop="interactionType" content="https://schema.org/LikeAction" /> </div> <div class="reactionsBar js-reactionsList "> </div> <div class="js-historyTarget message-historyTarget toggleTarget" data-href="trigger-href"></div> </footer> </div> </div> </div> </article> <article class="message message--post js-post js-inlineModContainer " data-author="For The Popcorn" data-content="post-1444085" id="js-post-1444085" itemscope itemtype="https://schema.org/Comment" itemid="https://www.electro-tech-online.com/posts/1444085/"> <meta itemprop="parentItem" itemscope itemid="https://www.electro-tech-online.com/threads/will-this-circuit-work.165495/" /> <span class="u-anchorTarget" id="post-1444085"></span> <div class="message-inner"> <div class="message-cell message-cell--user"> <section class="message-user" itemprop="author" itemscope itemtype="https://schema.org/Person" itemid="https://www.electro-tech-online.com/members/for-the-popcorn.315620/"> <meta itemprop="url" content="https://www.electro-tech-online.com/members/for-the-popcorn.315620/" /> <div class="message-avatar "> <div class="message-avatar-wrapper"> <a href="/members/for-the-popcorn.315620/" class="avatar avatar--m avatar--default avatar--default--dynamic" data-user-id="315620" data-xf-init="member-tooltip" style="background-color: #0f0f3d; color: #3333cc"> <span class="avatar-u315620-m" role="img" aria-label="For The Popcorn">F</span> </a> </div> </div> <div class="message-userDetails"> <h4 class="message-name"><a href="/members/for-the-popcorn.315620/" class="username " dir="auto" data-user-id="315620" data-xf-init="member-tooltip"><span itemprop="name">For The Popcorn</span></a></h4> <h5 class="userTitle message-userTitle" dir="auto" itemprop="jobTitle">Well-Known Member</h5> <div class="userBanner userBanner userBanner--gray message-userBanner" itemprop="jobTitle"><span class="userBanner-before"></span><strong>Most Helpful Member</strong><span class="userBanner-after"></span></div> </div> <span class="message-userArrow"></span> </section> </div> <div class="message-cell message-cell--main"> <div class="message-main js-quickEditTarget"> <header class="message-attribution message-attribution--split"> <ul class="message-attribution-main listInline "> <li class="u-concealed"> <a href="/threads/will-this-circuit-work.165495/post-1444085" rel="nofollow" itemprop="url"> <time class="u-dt" dir="auto" datetime="2023-11-10T13:43:17-0800" data-time="1699652597" data-date-string="Nov 10, 2023" data-time-string="1:43 PM" title="Nov 10, 2023 at 1:43 PM" itemprop="datePublished">Nov 10, 2023</time> </a> </li> </ul> <ul class="message-attribution-opposite message-attribution-opposite--list "> <li> <a href="/threads/will-this-circuit-work.165495/post-1444085" class="message-attribution-gadget" data-xf-init="share-tooltip" data-href="/posts/1444085/share" aria-label="Share" rel="nofollow"> <i class="fa--xf fal fa-share-alt" aria-hidden="true"></i> </a> </li> <li> <a href="/threads/will-this-circuit-work.165495/post-1444085" rel="nofollow"> #14 </a> </li> </ul> </header> <div class="message-content js-messageContent"> <div class="message-userContent lbContainer js-lbContainer " data-lb-id="post-1444085" data-lb-caption-desc="For The Popcorn · Nov 10, 2023 at 1:43 PM"> <article class="message-body js-selectToQuote"> <div itemprop="text"> <div class="bbWrapper">Speaking of warnings, our oven timer makes one small beep when the timer goes off. When the microwave is done, it beeps every 30 seconds until you tend to it.<br /> <br /> When the microwave beeps incessantly, the only danger is your food gets cold. If you miss the gentle beep of the oven, your next reminder may be smoke rolling out of the kitchen. Makes no sense.</div> </div> <div class="js-selectToQuoteEnd"> </div> </article> </div> <aside class="message-signature"> <div class="bbWrapper">Please visit Jon's Imaginarium at jons.fyi for tips, ideas, reference info and a lot more about electronics, laser cutting and other stuff.</div> </aside> </div> <footer class="message-footer"> <div class="message-microdata" itemprop="interactionStatistic" itemtype="https://schema.org/InteractionCounter" itemscope> <meta itemprop="userInteractionCount" content="0" /> <meta itemprop="interactionType" content="https://schema.org/LikeAction" /> </div> <div class="reactionsBar js-reactionsList "> </div> <div class="js-historyTarget message-historyTarget toggleTarget" data-href="trigger-href"></div> </footer> </div> </div> </div> </article> <article class="message message--post js-post js-inlineModContainer " data-author="gary350" data-content="post-1444090" id="js-post-1444090" itemscope itemtype="https://schema.org/Comment" itemid="https://www.electro-tech-online.com/posts/1444090/"> <meta itemprop="parentItem" itemscope itemid="https://www.electro-tech-online.com/threads/will-this-circuit-work.165495/" /> <span class="u-anchorTarget" id="post-1444090"></span> <div class="message-inner"> <div class="message-cell message-cell--user"> <section class="message-user" itemprop="author" itemscope itemtype="https://schema.org/Person" itemid="https://www.electro-tech-online.com/members/gary350.35041/"> <meta itemprop="url" content="https://www.electro-tech-online.com/members/gary350.35041/" /> <div class="message-avatar "> <div class="message-avatar-wrapper"> <a href="/members/gary350.35041/" class="avatar avatar--m avatar--default avatar--default--dynamic" data-user-id="35041" data-xf-init="member-tooltip" style="background-color: #33cc8f; color: #0f3d2b"> <span class="avatar-u35041-m" role="img" aria-label="gary350">G</span> </a> </div> </div> <div class="message-userDetails"> <h4 class="message-name"><a href="/members/gary350.35041/" class="username " dir="auto" data-user-id="35041" data-xf-init="member-tooltip"><span itemprop="name">gary350</span></a></h4> <h5 class="userTitle message-userTitle" dir="auto" itemprop="jobTitle">Well-Known Member</h5> </div> <span class="message-userArrow"></span> </section> </div> <div class="message-cell message-cell--main"> <div class="message-main js-quickEditTarget"> <header class="message-attribution message-attribution--split"> <ul class="message-attribution-main listInline "> <li class="u-concealed"> <a href="/threads/will-this-circuit-work.165495/post-1444090" rel="nofollow" itemprop="url"> <time class="u-dt" dir="auto" datetime="2023-11-10T15:48:23-0800" data-time="1699660103" data-date-string="Nov 10, 2023" data-time-string="3:48 PM" title="Nov 10, 2023 at 3:48 PM" itemprop="datePublished">Nov 10, 2023</time> </a> </li> </ul> <ul class="message-attribution-opposite message-attribution-opposite--list "> <li> <a href="/threads/will-this-circuit-work.165495/post-1444090" class="message-attribution-gadget" data-xf-init="share-tooltip" data-href="/posts/1444090/share" aria-label="Share" rel="nofollow"> <i class="fa--xf fal fa-share-alt" aria-hidden="true"></i> </a> </li> <li> <a href="/threads/will-this-circuit-work.165495/post-1444090" rel="nofollow"> #15 </a> </li> </ul> </header> <div class="message-content js-messageContent"> <div class="message-userContent lbContainer js-lbContainer " data-lb-id="post-1444090" data-lb-caption-desc="gary350 · Nov 10, 2023 at 3:48 PM"> <article class="message-body js-selectToQuote"> <div itemprop="text"> <div class="bbWrapper">Today I found what appears to be 2 types of buzzers from junk microwave oven circuits boards. I used a red auto flasher LED it flashes 60 times in 1 minute. I used a 470 ohm resistor in series with the LED. I also have a tiny speaker. 3 volts makes the speaker click click click each time I apply 3v. The larger buzzer in the center of photo makes clicking sounds. Buzzer on the right no sound.<br /> <br /> Next I soldered the resistor & LED to each, speaker & both buzzers. Speaker the red LED flashes but speaker makes no sound on 3v.<br /> <br /> Both buzzers make no sound and LED does not flash. <br /> <br /> My idea to use the LED as an automatic switch to make the buzzers beep, does not work. If I buy a new piezo buzzer LED won't make it beep either.<br /> <br /> I tried 3v 6v 12vdc on both buzzers with no resistor & no LED, no sound.<br /> <br /> 3v on LED flashes connected to the tiny speaker but no sound from the speaker.<br /> <br /> <br /> <br /> <div class="bbImageWrapper js-lbImage" title="101_8106.JPG" data-src="https://www.electro-tech-online.com/attachments/101_8106-jpg.143295/" data-lb-sidebar-href="" data-lb-caption-extra-html="" data-single-image="1"> <img src="https://www.electro-tech-online.com/attachments/101_8106-jpg.143295/" data-url="" class="bbImage" data-zoom-target="1" style="" alt="101_8106.JPG" title="101_8106.JPG" width="2048" height="1536" loading="lazy" /> </div><div class="bbImageWrapper js-lbImage" title="101_8110.JPG" data-src="https://www.electro-tech-online.com/attachments/101_8110-jpg.143296/" data-lb-sidebar-href="" data-lb-caption-extra-html="" data-single-image="1"> <img src="https://www.electro-tech-online.com/attachments/101_8110-jpg.143296/" data-url="" class="bbImage" data-zoom-target="1" style="" alt="101_8110.JPG" title="101_8110.JPG" width="2048" height="1536" loading="lazy" /> </div><div class="bbImageWrapper js-lbImage" title="101_8111.JPG" data-src="https://www.electro-tech-online.com/attachments/101_8111-jpg.143297/" data-lb-sidebar-href="" data-lb-caption-extra-html="" data-single-image="1"> <img src="https://www.electro-tech-online.com/attachments/101_8111-jpg.143297/" data-url="" class="bbImage" data-zoom-target="1" style="" alt="101_8111.JPG" title="101_8111.JPG" width="2048" height="1536" loading="lazy" /> </div></div> </div> <div class="js-selectToQuoteEnd"> </div> </article> </div> </div> <footer class="message-footer"> <div class="message-microdata" itemprop="interactionStatistic" itemtype="https://schema.org/InteractionCounter" itemscope> <meta itemprop="userInteractionCount" content="0" /> <meta itemprop="interactionType" content="https://schema.org/LikeAction" /> </div> <div class="reactionsBar js-reactionsList "> </div> <div class="js-historyTarget message-historyTarget toggleTarget" data-href="trigger-href"></div> </footer> </div> </div> </div> </article> <article class="message message--post js-post js-inlineModContainer " data-author="For The Popcorn" data-content="post-1444094" id="js-post-1444094" itemscope itemtype="https://schema.org/Comment" itemid="https://www.electro-tech-online.com/posts/1444094/"> <meta itemprop="parentItem" itemscope itemid="https://www.electro-tech-online.com/threads/will-this-circuit-work.165495/" /> <span class="u-anchorTarget" id="post-1444094"></span> <div class="message-inner"> <div class="message-cell message-cell--user"> <section class="message-user" itemprop="author" itemscope itemtype="https://schema.org/Person" itemid="https://www.electro-tech-online.com/members/for-the-popcorn.315620/"> <meta itemprop="url" content="https://www.electro-tech-online.com/members/for-the-popcorn.315620/" /> <div class="message-avatar "> <div class="message-avatar-wrapper"> <a href="/members/for-the-popcorn.315620/" class="avatar avatar--m avatar--default avatar--default--dynamic" data-user-id="315620" data-xf-init="member-tooltip" style="background-color: #0f0f3d; color: #3333cc"> <span class="avatar-u315620-m" role="img" aria-label="For The Popcorn">F</span> </a> </div> </div> <div class="message-userDetails"> <h4 class="message-name"><a href="/members/for-the-popcorn.315620/" class="username " dir="auto" data-user-id="315620" data-xf-init="member-tooltip"><span itemprop="name">For The Popcorn</span></a></h4> <h5 class="userTitle message-userTitle" dir="auto" itemprop="jobTitle">Well-Known Member</h5> <div class="userBanner userBanner userBanner--gray message-userBanner" itemprop="jobTitle"><span class="userBanner-before"></span><strong>Most Helpful Member</strong><span class="userBanner-after"></span></div> </div> <span class="message-userArrow"></span> </section> </div> <div class="message-cell message-cell--main"> <div class="message-main js-quickEditTarget"> <header class="message-attribution message-attribution--split"> <ul class="message-attribution-main listInline "> <li class="u-concealed"> <a href="/threads/will-this-circuit-work.165495/post-1444094" rel="nofollow" itemprop="url"> <time class="u-dt" dir="auto" datetime="2023-11-10T17:07:29-0800" data-time="1699664849" data-date-string="Nov 10, 2023" data-time-string="5:07 PM" title="Nov 10, 2023 at 5:07 PM" itemprop="datePublished">Nov 10, 2023</time> </a> </li> </ul> <ul class="message-attribution-opposite message-attribution-opposite--list "> <li> <a href="/threads/will-this-circuit-work.165495/post-1444094" class="message-attribution-gadget" data-xf-init="share-tooltip" data-href="/posts/1444094/share" aria-label="Share" rel="nofollow"> <i class="fa--xf fal fa-share-alt" aria-hidden="true"></i> </a> </li> <li> <a href="/threads/will-this-circuit-work.165495/post-1444094" rel="nofollow"> #16 </a> </li> </ul> </header> <div class="message-content js-messageContent"> <div class="message-userContent lbContainer js-lbContainer " data-lb-id="post-1444094" data-lb-caption-desc="For The Popcorn · Nov 10, 2023 at 5:07 PM"> <article class="message-body js-selectToQuote"> <div itemprop="text"> <div class="bbWrapper">Geez. Those are speakers. Did you expect the magical tone fairy to show up?<br /> <br /> Who knows what voltage your random junk maybe piezo beeper works at?<br /> <br /> The LEDs and beeper I pictured above were selected for specific characteristics. Sorry you won't find them at the Dollar Store or in a junk microwave.</div> </div> <div class="js-selectToQuoteEnd"> </div> </article> </div> <aside class="message-signature"> <div class="bbWrapper">Please visit Jon's Imaginarium at jons.fyi for tips, ideas, reference info and a lot more about electronics, laser cutting and other stuff.</div> </aside> </div> <footer class="message-footer"> <div class="message-microdata" itemprop="interactionStatistic" itemtype="https://schema.org/InteractionCounter" itemscope> <meta itemprop="userInteractionCount" content="1" /> <meta itemprop="interactionType" content="https://schema.org/LikeAction" /> </div> <div class="reactionsBar js-reactionsList is-active"> <ul class="reactionSummary"> <li><span class="reaction reaction--small reaction--1" data-reaction-id="1"><i aria-hidden="true"></i><img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="reaction-sprite js-reaction" alt="Like" title="Like" /></span></li> </ul> <span class="u-srOnly">Reactions:</span> <a class="reactionsBar-link" href="/posts/1444094/reactions" data-xf-click="overlay" data-cache="false" rel="nofollow"><bdi>shortbus=</bdi></a> </div> <div class="js-historyTarget message-historyTarget toggleTarget" data-href="trigger-href"></div> </footer> </div> </div> </div> </article> <article class="message message--post js-post js-inlineModContainer " data-author="Tony Stewart" data-content="post-1444097" id="js-post-1444097" itemscope itemtype="https://schema.org/Comment" itemid="https://www.electro-tech-online.com/posts/1444097/"> <meta itemprop="parentItem" itemscope itemid="https://www.electro-tech-online.com/threads/will-this-circuit-work.165495/" /> <span class="u-anchorTarget" id="post-1444097"></span> <div class="message-inner"> <div class="message-cell message-cell--user"> <section class="message-user" itemprop="author" itemscope itemtype="https://schema.org/Person" itemid="https://www.electro-tech-online.com/members/tony-stewart.214701/"> <meta itemprop="url" content="https://www.electro-tech-online.com/members/tony-stewart.214701/" /> <div class="message-avatar "> <div class="message-avatar-wrapper"> <a href="/members/tony-stewart.214701/" class="avatar avatar--m" data-user-id="214701" data-xf-init="member-tooltip"> <img src="/data/avatars/m/214/214701.jpg?1680361778" srcset="/data/avatars/l/214/214701.jpg?1680361778 2x" alt="Tony Stewart" class="avatar-u214701-m" width="96" height="96" loading="lazy" itemprop="image" /> </a> </div> </div> <div class="message-userDetails"> <h4 class="message-name"><a href="/members/tony-stewart.214701/" class="username " dir="auto" data-user-id="214701" data-xf-init="member-tooltip"><span itemprop="name">Tony Stewart</span></a></h4> <h5 class="userTitle message-userTitle" dir="auto" itemprop="jobTitle">Well-Known Member</h5> <div class="userBanner userBanner userBanner--gray message-userBanner" itemprop="jobTitle"><span class="userBanner-before"></span><strong>Most Helpful Member</strong><span class="userBanner-after"></span></div> </div> <span class="message-userArrow"></span> </section> </div> <div class="message-cell message-cell--main"> <div class="message-main js-quickEditTarget"> <header class="message-attribution message-attribution--split"> <ul class="message-attribution-main listInline "> <li class="u-concealed"> <a href="/threads/will-this-circuit-work.165495/post-1444097" rel="nofollow" itemprop="url"> <time class="u-dt" dir="auto" datetime="2023-11-10T18:01:53-0800" data-time="1699668113" data-date-string="Nov 10, 2023" data-time-string="6:01 PM" title="Nov 10, 2023 at 6:01 PM" itemprop="datePublished">Nov 10, 2023</time> </a> </li> </ul> <ul class="message-attribution-opposite message-attribution-opposite--list "> <li> <a href="/threads/will-this-circuit-work.165495/post-1444097" class="message-attribution-gadget" data-xf-init="share-tooltip" data-href="/posts/1444097/share" aria-label="Share" rel="nofollow"> <i class="fa--xf fal fa-share-alt" aria-hidden="true"></i> </a> </li> <li> <a href="/threads/will-this-circuit-work.165495/post-1444097" rel="nofollow"> #17 </a> </li> </ul> </header> <div class="message-content js-messageContent"> <div class="message-userContent lbContainer js-lbContainer " data-lb-id="post-1444097" data-lb-caption-desc="Tony Stewart · Nov 10, 2023 at 6:01 PM"> <article class="message-body js-selectToQuote"> <div itemprop="text"> <div class="bbWrapper">3.4V LEDs are nominal Voltage @ 30 mA for both blue and white 5mm and using incremental Rs=16 ohms (typ.)<br /> <br /> I expect at 5mA Vf= 3.4V - 25mA*16 ohm = 3.0V but it will drop quickly to near 0 brightness with battery voltage @ 2.5V<br /> <br /> You would not put two different impedance devices in series and expect them to share battery voltage in half, thus you might choose to use them in parallel with a battery that still works at low voltage.<br /> <br /> Buzzers come in many types and current is generally linear with voltage.<br /> <ol> <li data-xf-list-type="ol">Internal oscillator, piezo</li> <li data-xf-list-type="ol">External oscillator, piezo</li> <li data-xf-list-type="ol">Magnetic (electro-mechanical), internal oscillator.</li> </ol>LEDs with built-in flasher drivers (rare)<br /> LEDs without flashers (common)<br /> <br /> They are not all the same loudness and magnetic tend to be lower pitch.<br /> The best solution is to choose a common flash rate for both and one can alternate the current between driving the LED on and then the Buzzer On to conserve power using a CMOS astable oscillator at any frequency in the 1 Hz range easily with 10 Meg and 68 nF.<br /> <br /> This may not meet your simplicity requirements but is not hard to do with a piezo buzzer and an LED.<br /> <br /> They do make vehicle backup flashing buzzers but these use several parts and naturally cost a lot more.</div> </div> <div class="js-selectToQuoteEnd"> </div> </article> </div> <div class="message-lastEdit"> Last edited: <time class="u-dt" dir="auto" datetime="2023-11-10T18:18:35-0800" data-time="1699669115" data-date-string="Nov 10, 2023" data-time-string="6:18 PM" title="Nov 10, 2023 at 6:18 PM" itemprop="dateModified">Nov 10, 2023</time> </div> <aside class="message-signature"> <div class="bbWrapper">In theory, it makes no difference, in practice it does, but depends on your experience.<br /> EE since 1975.</div> </aside> </div> <footer class="message-footer"> <div class="message-microdata" itemprop="interactionStatistic" itemtype="https://schema.org/InteractionCounter" itemscope> <meta itemprop="userInteractionCount" content="0" /> <meta itemprop="interactionType" content="https://schema.org/LikeAction" /> </div> <div class="reactionsBar js-reactionsList "> </div> <div class="js-historyTarget message-historyTarget toggleTarget" data-href="trigger-href"></div> </footer> </div> </div> </div> </article> <article class="message message--post js-post js-inlineModContainer " data-author="audioguru" data-content="post-1444099" id="js-post-1444099" itemscope itemtype="https://schema.org/Comment" itemid="https://www.electro-tech-online.com/posts/1444099/"> <meta itemprop="parentItem" itemscope itemid="https://www.electro-tech-online.com/threads/will-this-circuit-work.165495/" /> <span class="u-anchorTarget" id="post-1444099"></span> <div class="message-inner"> <div class="message-cell message-cell--user"> <section class="message-user" itemprop="author" itemscope itemtype="https://schema.org/Person" itemid="https://www.electro-tech-online.com/members/audioguru.16360/"> <meta itemprop="url" content="https://www.electro-tech-online.com/members/audioguru.16360/" /> <div class="message-avatar "> <div class="message-avatar-wrapper"> <a href="/members/audioguru.16360/" class="avatar avatar--m" data-user-id="16360" data-xf-init="member-tooltip"> <img src="/data/avatars/m/16/16360.jpg?1386438875" srcset="/data/avatars/l/16/16360.jpg?1386438875 2x" alt="audioguru" class="avatar-u16360-m" width="96" height="96" loading="lazy" itemprop="image" /> </a> </div> </div> <div class="message-userDetails"> <h4 class="message-name"><a href="/members/audioguru.16360/" class="username " dir="auto" data-user-id="16360" data-xf-init="member-tooltip"><span itemprop="name">audioguru</span></a></h4> <h5 class="userTitle message-userTitle" dir="auto" itemprop="jobTitle">Well-Known Member</h5> <div class="userBanner userBanner userBanner--gray message-userBanner" itemprop="jobTitle"><span class="userBanner-before"></span><strong>Most Helpful Member</strong><span class="userBanner-after"></span></div> </div> <span class="message-userArrow"></span> </section> </div> <div class="message-cell message-cell--main"> <div class="message-main js-quickEditTarget"> <header class="message-attribution message-attribution--split"> <ul class="message-attribution-main listInline "> <li class="u-concealed"> <a href="/threads/will-this-circuit-work.165495/post-1444099" rel="nofollow" itemprop="url"> <time class="u-dt" dir="auto" datetime="2023-11-10T18:16:03-0800" data-time="1699668963" data-date-string="Nov 10, 2023" data-time-string="6:16 PM" title="Nov 10, 2023 at 6:16 PM" itemprop="datePublished">Nov 10, 2023</time> </a> </li> </ul> <ul class="message-attribution-opposite message-attribution-opposite--list "> <li> <a href="/threads/will-this-circuit-work.165495/post-1444099" class="message-attribution-gadget" data-xf-init="share-tooltip" data-href="/posts/1444099/share" aria-label="Share" rel="nofollow"> <i class="fa--xf fal fa-share-alt" aria-hidden="true"></i> </a> </li> <li> <a href="/threads/will-this-circuit-work.165495/post-1444099" rel="nofollow"> #18 </a> </li> </ul> </header> <div class="message-content js-messageContent"> <div class="message-userContent lbContainer js-lbContainer " data-lb-id="post-1444099" data-lb-caption-desc="audioguru · Nov 10, 2023 at 6:16 PM"> <article class="message-body js-selectToQuote"> <div itemprop="text"> <div class="bbWrapper">The piezo in the middle is a piezo transducer (speaker) that does not conduct DC. The piezo on the right side probably has an oscillator circuit inside it which conducts DC and causes the piezo to beeeeep.</div> </div> <div class="js-selectToQuoteEnd"> </div> </article> </div> <aside class="message-signature"> <div class="bbWrapper">Uncle $crooge</div> </aside> </div> <footer class="message-footer"> <div class="message-microdata" itemprop="interactionStatistic" itemtype="https://schema.org/InteractionCounter" itemscope> <meta itemprop="userInteractionCount" content="0" /> <meta itemprop="interactionType" content="https://schema.org/LikeAction" /> </div> <div class="reactionsBar js-reactionsList "> </div> <div class="js-historyTarget message-historyTarget toggleTarget" data-href="trigger-href"></div> </footer> </div> </div> </div> </article> <article class="message message--post js-post js-inlineModContainer " data-author="gary350" data-content="post-1444120" id="js-post-1444120" itemscope itemtype="https://schema.org/Comment" itemid="https://www.electro-tech-online.com/posts/1444120/"> <meta itemprop="parentItem" itemscope itemid="https://www.electro-tech-online.com/threads/will-this-circuit-work.165495/" /> <span class="u-anchorTarget" id="post-1444120"></span> <div class="message-inner"> <div class="message-cell message-cell--user"> <section class="message-user" itemprop="author" itemscope itemtype="https://schema.org/Person" itemid="https://www.electro-tech-online.com/members/gary350.35041/"> <meta itemprop="url" content="https://www.electro-tech-online.com/members/gary350.35041/" /> <div class="message-avatar "> <div class="message-avatar-wrapper"> <a href="/members/gary350.35041/" class="avatar avatar--m avatar--default avatar--default--dynamic" data-user-id="35041" data-xf-init="member-tooltip" style="background-color: #33cc8f; color: #0f3d2b"> <span class="avatar-u35041-m" role="img" aria-label="gary350">G</span> </a> </div> </div> <div class="message-userDetails"> <h4 class="message-name"><a href="/members/gary350.35041/" class="username " dir="auto" data-user-id="35041" data-xf-init="member-tooltip"><span itemprop="name">gary350</span></a></h4> <h5 class="userTitle message-userTitle" dir="auto" itemprop="jobTitle">Well-Known Member</h5> </div> <span class="message-userArrow"></span> </section> </div> <div class="message-cell message-cell--main"> <div class="message-main js-quickEditTarget"> <header class="message-attribution message-attribution--split"> <ul class="message-attribution-main listInline "> <li class="u-concealed"> <a href="/threads/will-this-circuit-work.165495/post-1444120" rel="nofollow" itemprop="url"> <time class="u-dt" dir="auto" datetime="2023-11-11T05:58:04-0800" data-time="1699711084" data-date-string="Nov 11, 2023" data-time-string="5:58 AM" title="Nov 11, 2023 at 5:58 AM" itemprop="datePublished">Nov 11, 2023</time> </a> </li> </ul> <ul class="message-attribution-opposite message-attribution-opposite--list "> <li> <a href="/threads/will-this-circuit-work.165495/post-1444120" class="message-attribution-gadget" data-xf-init="share-tooltip" data-href="/posts/1444120/share" aria-label="Share" rel="nofollow"> <i class="fa--xf fal fa-share-alt" aria-hidden="true"></i> </a> </li> <li> <a href="/threads/will-this-circuit-work.165495/post-1444120" rel="nofollow"> #19 </a> </li> </ul> </header> <div class="message-content js-messageContent"> <div class="message-userContent lbContainer js-lbContainer " data-lb-id="post-1444120" data-lb-caption-desc="gary350 · Nov 11, 2023 at 5:58 AM"> <article class="message-body js-selectToQuote"> <div itemprop="text"> <div class="bbWrapper"><blockquote data-attributes="member: 16360" data-quote="audioguru" data-source="post: 1444099" class="bbCodeBlock bbCodeBlock--expandable bbCodeBlock--quote js-expandWatch"> <div class="bbCodeBlock-title"> <a href="/goto/post?id=1444099" class="bbCodeBlock-sourceJump" rel="nofollow" data-xf-click="attribution" data-content-selector="#post-1444099">audioguru said:</a> </div> <div class="bbCodeBlock-content"> <div class="bbCodeBlock-expandContent js-expandContent "> The piezo in the middle is a piezo transducer (speaker) that does not conduct DC. The piezo on the right side probably has an oscillator circuit inside it which conducts DC and causes the piezo to beeeeep. </div> <div class="bbCodeBlock-expandLink js-expandLink"><a role="button" tabindex="0">Click to expand...</a></div> </div> </blockquote><br /> The middle one that you call a transducer will make click click click sounds if I keep swapping battery wires +-+-+-+-+-+-+-. If I give the transducer +++++++++++ or ------------ it only clicks 1 time. This device needs AC to work. It clicks on 3vc and clicks louder on 12vdv. 3000KHz will make this device buzz.<br /> <br /> The pieco on the right makes no sound 3v or 12v on DC or AC.<br /> <br /> I asked the wrong question on this thread. I should have asked. How can I make a BEEP sound 1 times per second with minimum number of parts?<br /> <br /> It is very easy to flash an NE2 neon with 1 resistor & 1 capacitor at 55VDC. With AC add 1 diode to the circuit. DC won't work in the transducer. <br /> <br /> 555 circuit will work, Mosfet osc circuit will work. But I want a very simple easy to build circuit very few parts if possible.<br /> <br /> Anyone have suggestions for very simple 1 beep per second buzzer circuit?</div> </div> <div class="js-selectToQuoteEnd"> </div> </article> </div> <div class="message-lastEdit"> Last edited: <time class="u-dt" dir="auto" datetime="2023-11-11T06:09:23-0800" data-time="1699711763" data-date-string="Nov 11, 2023" data-time-string="6:09 AM" title="Nov 11, 2023 at 6:09 AM" itemprop="dateModified">Nov 11, 2023</time> </div> </div> <footer class="message-footer"> <div class="message-microdata" itemprop="interactionStatistic" itemtype="https://schema.org/InteractionCounter" itemscope> <meta itemprop="userInteractionCount" content="0" /> <meta itemprop="interactionType" content="https://schema.org/LikeAction" /> </div> <div class="reactionsBar js-reactionsList "> </div> <div class="js-historyTarget message-historyTarget toggleTarget" data-href="trigger-href"></div> </footer> </div> </div> </div> </article> <article class="message message--post js-post js-inlineModContainer " data-author="Tony Stewart" data-content="post-1444121" id="js-post-1444121" itemscope itemtype="https://schema.org/Comment" itemid="https://www.electro-tech-online.com/posts/1444121/"> <meta itemprop="parentItem" itemscope itemid="https://www.electro-tech-online.com/threads/will-this-circuit-work.165495/" /> <span class="u-anchorTarget" id="post-1444121"></span> <div class="message-inner"> <div class="message-cell message-cell--user"> <section class="message-user" itemprop="author" itemscope itemtype="https://schema.org/Person" itemid="https://www.electro-tech-online.com/members/tony-stewart.214701/"> <meta itemprop="url" content="https://www.electro-tech-online.com/members/tony-stewart.214701/" /> <div class="message-avatar "> <div class="message-avatar-wrapper"> <a href="/members/tony-stewart.214701/" class="avatar avatar--m" data-user-id="214701" data-xf-init="member-tooltip"> <img src="/data/avatars/m/214/214701.jpg?1680361778" srcset="/data/avatars/l/214/214701.jpg?1680361778 2x" alt="Tony Stewart" class="avatar-u214701-m" width="96" height="96" loading="lazy" itemprop="image" /> </a> </div> </div> <div class="message-userDetails"> <h4 class="message-name"><a href="/members/tony-stewart.214701/" class="username " dir="auto" data-user-id="214701" data-xf-init="member-tooltip"><span itemprop="name">Tony Stewart</span></a></h4> <h5 class="userTitle message-userTitle" dir="auto" itemprop="jobTitle">Well-Known Member</h5> <div class="userBanner userBanner userBanner--gray message-userBanner" itemprop="jobTitle"><span class="userBanner-before"></span><strong>Most Helpful Member</strong><span class="userBanner-after"></span></div> </div> <span class="message-userArrow"></span> </section> </div> <div class="message-cell message-cell--main"> <div class="message-main js-quickEditTarget"> <header class="message-attribution message-attribution--split"> <ul class="message-attribution-main listInline "> <li class="u-concealed"> <a href="/threads/will-this-circuit-work.165495/post-1444121" rel="nofollow" itemprop="url"> <time class="u-dt" dir="auto" datetime="2023-11-11T06:08:03-0800" data-time="1699711683" data-date-string="Nov 11, 2023" data-time-string="6:08 AM" title="Nov 11, 2023 at 6:08 AM" itemprop="datePublished">Nov 11, 2023</time> </a> </li> </ul> <ul class="message-attribution-opposite message-attribution-opposite--list "> <li> <a href="/threads/will-this-circuit-work.165495/post-1444121" class="message-attribution-gadget" data-xf-init="share-tooltip" data-href="/posts/1444121/share" aria-label="Share" rel="nofollow"> <i class="fa--xf fal fa-share-alt" aria-hidden="true"></i> </a> </li> <li> <a href="/threads/will-this-circuit-work.165495/post-1444121" rel="nofollow"> #20 </a> </li> </ul> </header> <div class="message-content js-messageContent"> <div class="message-userContent lbContainer js-lbContainer " data-lb-id="post-1444121" data-lb-caption-desc="Tony Stewart · Nov 11, 2023 at 6:08 AM"> <article class="message-body js-selectToQuote"> <div itemprop="text"> <div class="bbWrapper"><blockquote data-attributes="member: 35041" data-quote="gary350" data-source="post: 1444120" class="bbCodeBlock bbCodeBlock--expandable bbCodeBlock--quote js-expandWatch"> <div class="bbCodeBlock-title"> <a href="/goto/post?id=1444120" class="bbCodeBlock-sourceJump" rel="nofollow" data-xf-click="attribution" data-content-selector="#post-1444120">gary350 said:</a> </div> <div class="bbCodeBlock-content"> <div class="bbCodeBlock-expandContent js-expandContent "> The middle one that you call a transducer will make click click click sounds if I keep swapping battery wires +-+-+-+-+-+-+-. If I give the transducer +++++++++++ or ------------ it only clicks 1 time. This device needs AC to work. It clicks on 3vc and clicks louder on 12vdv. 3000KHz will make this device buzz.<br /> <br /> The pieco on the right makes no sound 3v or 12v on DC or AC.<br /> <br /> I asked the wrong question on this thread. I should have asked. How can I make a BEEP sound 1 times per second with minimum number of parts?<br /> <br /> It is very easy to flash an NE2 neon with 1 resistor & 1 capacitor at 55VDC. Or AC add 1 diode to the circuit.<br /> <br /> 555 circuit will work, Mosfet osc circuit will work. I want a very simple easy to build circuit very few parts if possible.<br /> <br /> Anyone have suggestions for very simple 1 beep per second buzzer circuit? </div> <div class="bbCodeBlock-expandLink js-expandLink"><a role="button" tabindex="0">Click to expand...</a></div> </div> </blockquote>That is type 2 with the external oscillator. (constant or sweeping or beeping tone) Your choice. its external.</div> </div> <div class="js-selectToQuoteEnd"> </div> </article> </div> <aside class="message-signature"> <div class="bbWrapper">In theory, it makes no difference, in practice it does, but depends on your experience.<br /> EE since 1975.</div> </aside> </div> <footer class="message-footer"> <div class="message-microdata" itemprop="interactionStatistic" itemtype="https://schema.org/InteractionCounter" itemscope> <meta itemprop="userInteractionCount" content="0" /> <meta itemprop="interactionType" content="https://schema.org/LikeAction" /> </div> <div class="reactionsBar js-reactionsList "> </div> <div class="js-historyTarget message-historyTarget toggleTarget" data-href="trigger-href"></div> </footer> </div> </div> </div> </article> </div> </div> <div class="block-outer block-outer--after"> <div class="block-outer-main"><nav class="pageNavWrapper pageNavWrapper--full "> <div class="pageNav "> <ul class="pageNav-main"> <li class="pageNav-page pageNav-page--current "><a href="/threads/will-this-circuit-work.165495/">1</a></li> <li class="pageNav-page pageNav-page--later"><a href="/threads/will-this-circuit-work.165495/page-2">2</a></li> <li class="pageNav-page "><a href="/threads/will-this-circuit-work.165495/page-3">3</a></li> </ul> <a href="/threads/will-this-circuit-work.165495/page-2" class="pageNav-jump pageNav-jump--next">Next</a> </div> <div class="pageNavSimple"> <a class="pageNavSimple-el pageNavSimple-el--current" data-xf-init="tooltip" title="Go to page" data-xf-click="menu" role="button" tabindex="0" aria-expanded="false" aria-haspopup="true"> 1 of 3 </a> <div class="menu menu--pageJump" data-menu="menu" aria-hidden="true"> <div class="menu-content"> <h4 class="menu-header">Go to page</h4> <div class="menu-row" data-xf-init="page-jump" data-page-url="/threads/will-this-circuit-work.165495/page-%page%"> <div class="inputGroup inputGroup--numbers"> <div class="inputGroup inputGroup--numbers inputNumber" data-xf-init="number-box"><input type="number" pattern="\d*" class="input input--number js-numberBoxTextInput input input--numberNarrow js-pageJumpPage" value="1" min="1" max="3" step="1" required="required" data-menu-autofocus="true" /></div> <span class="inputGroup-text"><button type="button" class="js-pageJumpGo button"><span class="button-text">Go</span></button></span> </div> </div> </div> </div> <a href="/threads/will-this-circuit-work.165495/page-2" class="pageNavSimple-el pageNavSimple-el--next"> Next <i aria-hidden="true"></i> </a> <a href="/threads/will-this-circuit-work.165495/page-3" class="pageNavSimple-el pageNavSimple-el--last" data-xf-init="tooltip" title="Last"> <i aria-hidden="true"></i> <span class="u-srOnly">Last</span> </a> </div> </nav> </div> </div> <div class="block-outer block-outer--after"> <dl class="blockStatus"> <dt>Status</dt> <dd class="blockStatus-message blockStatus-message--locked"> Not open for further replies. </dd> </dl> </div> </div> <div class="inContentAd"><div id='div-gpt-eto_thread1'> <script> googletag.cmd.push(function() { googletag.display('div-gpt-eto_thread1'); 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I am only interested is a circuit where the buzzer buzzes about 1 time every second. I have not bought buzzers yet so I can't build a circuit to see if it works. Data on buzzer says nothing about DC or AC. Do data on buzzer volume either. Buzzer is probably about what is in a microwave oven." }, "publisher": { "@type": "Organization", "name": "Electronics Forum (Circuits, Projects and Microcontrollers)", "description": "An electronics forum to talk all about circuits and projects.", "url": "https://www.electro-tech-online.com" } } </script>  <noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-MMC9PJ9" height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>   <noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-KLX5R59" height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>  <script> $(function(){ var notice = $('.xb-welcome-notice'); if(notice.length){ var cookie = XF.Cookie.get('hide_welcome_notice'); if(!cookie){ XF.Cookie.set('hide_welcome_notice', Date.now()); notice.show(); } else if ((Date.now() - cookie) > 8.64e+7){ XF.Cookie.set('hide_welcome_notice', Date.now()); notice.show(); } else { notice.hide(); } } }); </script> </div> </body> </html>

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