CINXE.COM

<?xml version="1.0" encoding="utf-8"?> <rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/"> <channel> <title>Forum for Electronics</title> <description>International Electronics Discussion Forum: EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals</description> <pubDate>Mon, 17 Feb 2025 07:33:21 +0000</pubDate> <lastBuildDate>Mon, 17 Feb 2025 07:33:21 +0000</lastBuildDate> <generator>Forum for Electronics</generator> <link>https://www.edaboard.com/</link> <atom:link rel="self" type="application/rss+xml" href="https://www.edaboard.com/forums/-/index.rss"/> <item> <title>Please help me identify this mosfet.</title> <pubDate>Mon, 17 Feb 2025 06:59:05 +0000</pubDate> <link>https://www.edaboard.com/threads/please-help-me-identify-this-mosfet.414046/</link> <guid isPermaLink="false">414046</guid> <author>invalid@example.com (electricrazy45)</author> <category domain="https://www.edaboard.com/forums/service-manuals-requests-repair-tips.33/"><![CDATA[Service Manuals, Requests, Repair Tips]]></category> <dc:creator>electricrazy45</dc:creator> <content:encoded><![CDATA[<div class="bbWrapper">Hi. I have here a pcb from a Milwaukee m12fid2 impact drill driver that doesn't work. i took it apart and found a burnt mosfet. I have a picture of the numbers on it but cant seem to find an exact match. please can anyone help?<br /> <br /> regards.</div>]]></content:encoded> <slash:comments>2</slash:comments> </item> <item> <title>Building a Power Supply for My Project</title> <pubDate>Mon, 17 Feb 2025 06:15:23 +0000</pubDate> <link>https://www.edaboard.com/threads/building-a-power-supply-for-my-project.414053/</link> <guid isPermaLink="false">414053</guid> <author>invalid@example.com (LoveChip)</author> <category domain="https://www.edaboard.com/forums/power-electronics.47/"><![CDATA[Power Electronics]]></category> <dc:creator>LoveChip</dc:creator> <content:encoded><![CDATA[<div class="bbWrapper">I need to build a power supply with adjustable output voltage for my DIY electronics project that can power a variety of electronic devices including Arduino-based projects, small motors, sensors, etc.<br /> <br /> For the core electronics of this power supply, I have two choices, one is the RT8223MGQW synchronous step-down converter, and the other is the MP2307DN-LF-Z. Does anyone know which one fits better?<br /> <br /> <a href="https://www.mouser.com/ProductDetail/Monolithic-Power-Systems-MPS/MP2307DN-LF-Z" target="_blank" class="link link--external" rel="nofollow ugc noopener">MP2307DN-LF-Z specs</a><br /> <br /> <a href="https://www.avaq.com/chip/rt8223mgqw" target="_blank" class="link link--external" rel="nofollow ugc noopener">RT8223MGQW specs</a></div>]]></content:encoded> <slash:comments>0</slash:comments> </item> <item> <title>Joining Two Devices. Is it possible?</title> <pubDate>Mon, 17 Feb 2025 04:49:11 +0000</pubDate> <link>https://www.edaboard.com/threads/joining-two-devices-is-it-possible.413915/</link> <guid isPermaLink="false">413915</guid> <author>invalid@example.com (SharpTeeth)</author> <category domain="https://www.edaboard.com/forums/miscellaneous-engineering.18/"><![CDATA[Miscellaneous Engineering]]></category> <dc:creator>SharpTeeth</dc:creator> <content:encoded><![CDATA[<div class="bbWrapper">Hi everyone. New guy here. I am not an engineer but instead an artist who could use some help. I hope I am posting this in the right section.<br /> <br /> I am wondering if it is possible to integrate these two devices below? I want to attach a Garage Hoist to a Grow Light Mover. I鈥檓 not sure if they are compatible or can do what I want them to do together. Any help would be greatly appreciated.<br /> <br /> The end result I want happen is when the Grow Light Mover stops on one end of the rail, the Hoist will...<br /> <br /> <a href="https://www.edaboard.com/threads/joining-two-devices-is-it-possible.413915/" class="link link--internal">Read more</a></div>]]></content:encoded> <slash:comments>19</slash:comments> </item> <item> <title>Am I supposed to make a symbol for this schematic I copied from datasheet?</title> <pubDate>Mon, 17 Feb 2025 04:03:18 +0000</pubDate> <link>https://www.edaboard.com/threads/am-i-supposed-to-make-a-symbol-for-this-schematic-i-copied-from-datasheet.414052/</link> <guid isPermaLink="false">414052</guid> <author>invalid@example.com (rf_practitioner)</author> <category domain="https://www.edaboard.com/forums/rf-microwave-antennas-and-optics.26/"><![CDATA[RF, Microwave, Antennas and Optics]]></category> <dc:creator>rf_practitioner</dc:creator> <content:encoded><![CDATA[<div class="bbWrapper">I am looking at a data sheet for ATF55143 and there is a die model and a package model on pg 17. Am I supposed to create a symbol for the package model if I want to accurately create simulations using this particular pHEMT? Also, I can't seem to find any ready-made ADS models for e-pHEMT transistors. Is there an online resource, maybe a repository, that gives access to ads models that are compatible with ads 2020?</div>]]></content:encoded> <slash:comments>1</slash:comments> </item> <item> <title>Redirecting High AC Current in Electrical Systems</title> <pubDate>Mon, 17 Feb 2025 03:58:50 +0000</pubDate> <link>https://www.edaboard.com/threads/redirecting-high-ac-current-in-electrical-systems.414051/</link> <guid isPermaLink="false">414051</guid> <author>invalid@example.com (Labira Jaya Teknik)</author> <category domain="https://www.edaboard.com/forums/business-promotions-advertising.43/"><![CDATA[Business, Promotions, Advertising]]></category> <dc:creator>Labira Jaya Teknik</dc:creator> <content:encoded><![CDATA[<div class="bbWrapper">Redirecting high AC current is an essential practice in managing electrical systems, particularly when handling high voltage or current levels. High AC current is widely used in power distribution networks, industrial applications, and large-scale electrical systems due to its efficiency in transmitting power over long distances. However, if not properly controlled or redirected, high AC current can lead to dangerous situations, such as circuit overloads, equipment failure, or even...<br /> <br /> <a href="https://www.edaboard.com/threads/redirecting-high-ac-current-in-electrical-systems.414051/" class="link link--internal">Read more</a></div>]]></content:encoded> <slash:comments>0</slash:comments> </item> <item> <title>FFT simulation in cadence</title> <pubDate>Mon, 17 Feb 2025 03:45:32 +0000</pubDate> <link>https://www.edaboard.com/threads/fft-simulation-in-cadence.414050/</link> <guid isPermaLink="false">414050</guid> <author>invalid@example.com (the8thhabit)</author> <category domain="https://www.edaboard.com/forums/analog-integrated-circuit-ic-design-layout-and-more.39/"><![CDATA[Analog Integrated Circuit (IC) Design, Layout and more]]></category> <dc:creator>the8thhabit</dc:creator> <content:encoded><![CDATA[<div class="bbWrapper">Hello!<br /> I am designing a noise shaping SAR ADC in CADENCE and I have a question in FFT simulation.<br /> I used a 10-bit CDAC, OSR = 4, fs = 20MHz, sampling count = 2048.<br /> Then the bandwidth is fs/2/OSR, so 2.5 MHz.<br /> If I set k=31 in the equation k*fs/sample count, the fin (input frequency) would be 0.302MHz.<br /> I ran the FFT simulation until 2048*50ns = 102.4us and then ran the FFT simulation.<br /> <br /> In this case, I was wondering if it is correct to set the end frequency to 2.5MHz, which is the bandwidth, as...<br /> <br /> <a href="https://www.edaboard.com/threads/fft-simulation-in-cadence.414050/" class="link link--internal">Read more</a></div>]]></content:encoded> <slash:comments>0</slash:comments> </item> <item> <title>My antenna behaved different...</title> <pubDate>Mon, 17 Feb 2025 02:47:07 +0000</pubDate> <link>https://www.edaboard.com/threads/my-antenna-behaved-different.414049/</link> <guid isPermaLink="false">414049</guid> <author>invalid@example.com (Externet)</author> <category domain="https://www.edaboard.com/forums/rf-microwave-antennas-and-optics.26/"><![CDATA[RF, Microwave, Antennas and Optics]]></category> <dc:creator>Externet</dc:creator> <content:encoded><![CDATA[<div class="bbWrapper">Hello all. <br /> Made it a year ago and after tweaking its diameter by try-and-error a few times has been performing very well since and am happy with its performance. Reaaally pleased. <img class="smilie smilie--emoji" loading="lazy" alt="馃槉" title="Smiling face with smiling eyes :blush:" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f60a.png" data-shortname=":blush:" /> <br /> A few days ago got pixelation on one channel and decided to see if any anomaly was visible on it. Found nothing. Rotated it half turn and pixelation was gone. I do not know if the wind did something but can anyone tell me <u>why</u> a circular loop would change behavior by just <u>turning it </u>on its...<br /> <br /> <a href="https://www.edaboard.com/threads/my-antenna-behaved-different.414049/" class="link link--internal">Read more</a></div>]]></content:encoded> <slash:comments>4</slash:comments> </item> <item> <title>Using a Crystal on a Breadboard</title> <pubDate>Sun, 16 Feb 2025 19:50:55 +0000</pubDate> <link>https://www.edaboard.com/threads/using-a-crystal-on-a-breadboard.414047/</link> <guid isPermaLink="false">414047</guid> <author>invalid@example.com (Kittu20)</author> <category domain="https://www.edaboard.com/forums/microcontrollers.31/"><![CDATA[Microcontrollers]]></category> <dc:creator>Kittu20</dc:creator> <content:encoded><![CDATA[<div class="bbWrapper">Hello Everyone <br /> <br /> I was previously using the internal oscillator for my PIC microcontroller, but now I want to switch to a crystal for better accuracy. My setup is currently on a breadboard, and I plan to use a crystal along with two ceramic capacitors on breadboard setup. <br /> <br /> I鈥檓 curious鈥攚ill using a crystal on a breadboard cause any connection or stability issues?</div>]]></content:encoded> <slash:comments>2</slash:comments> </item> <item> <title>mixer downconversion noise output level dB/Hz</title> <pubDate>Sun, 16 Feb 2025 17:44:16 +0000</pubDate> <link>https://www.edaboard.com/threads/mixer-downconversion-noise-output-level-db-hz.413927/</link> <guid isPermaLink="false">413927</guid> <author>invalid@example.com (yefj)</author> <category domain="https://www.edaboard.com/forums/rf-microwave-antennas-and-optics.26/"><![CDATA[RF, Microwave, Antennas and Optics]]></category> <dc:creator>yefj</dc:creator> <content:encoded><![CDATA[<div class="bbWrapper">Hello, I have a mixer shown in the link below.The way I calculate the noise coming out of the mixer is as following:<br /> -174+NF-conversion loss=-174+0.5-6=-179.5dB/Hz so far I am correct?<br /> also the <br /> Mixer Noise Figure typically measures within +0.5 dB of conversion loss for IF frequencies greater than 5 MHz.<br /> However I was told that we add another 3dB because we convert noise from RF twice.<br /> If its true, Is there some visualisation I could use to see why we add another 3dB?<br /> Thanks...<br /> <br /> <a href="https://www.edaboard.com/threads/mixer-downconversion-noise-output-level-db-hz.413927/" class="link link--internal">Read more</a></div>]]></content:encoded> <slash:comments>14</slash:comments> </item> <item> <title>LED Driver not working in cold</title> <pubDate>Sun, 16 Feb 2025 17:19:11 +0000</pubDate> <link>https://www.edaboard.com/threads/led-driver-not-working-in-cold.413709/</link> <guid isPermaLink="false">413709</guid> <author>invalid@example.com (lapa678)</author> <category domain="https://www.edaboard.com/forums/power-electronics.47/"><![CDATA[Power Electronics]]></category> <dc:creator>lapa678</dc:creator> <content:encoded><![CDATA[<div class="bbWrapper">Hi guys! <br /> <br /> I have designed the LED driver based in IDL8150 driver. It seems to be working, but in cold case i.e. powering up the circuit close to 0 deg. C the converter does not start... I need to do plenty of power up cycles to get it running. <br /> <br /> I have tried to put all the caps (decoupling, bootstrap) closer to chip , but no good.... <br /> <br /> Before I upload the schematics and PCB design, are there any ideas you could give me? <br /> <br /> Best regards, <br /> Tom</div>]]></content:encoded> <slash:comments>54</slash:comments> </item> <item> <title>simcom a7682e</title> <pubDate>Sun, 16 Feb 2025 16:42:57 +0000</pubDate> <link>https://www.edaboard.com/threads/simcom-a7682e.414045/</link> <guid isPermaLink="false">414045</guid> <author>invalid@example.com (scc7)</author> <category domain="https://www.edaboard.com/forums/simcom-gsm-gprs-technical-discussion.298/"><![CDATA[SIMCOM GSM /GPRS TECHNICAL DISCUSSION]]></category> <dc:creator>scc7</dc:creator> <content:encoded><![CDATA[<div class="bbWrapper">hi, is it possible using a7682e module as a tcp modbus slave? if it is possible, which tcp modes are more compatible for modbus ?</div>]]></content:encoded> <slash:comments>2</slash:comments> </item> <item> <title>Modulation Generation</title> <pubDate>Sun, 16 Feb 2025 16:18:44 +0000</pubDate> <link>https://www.edaboard.com/threads/modulation-generation.413964/</link> <guid isPermaLink="false">413964</guid> <author>invalid@example.com (Techman_7)</author> <category domain="https://www.edaboard.com/forums/power-electronics.47/"><![CDATA[Power Electronics]]></category> <dc:creator>Techman_7</dc:creator> <content:encoded><![CDATA[<div class="bbWrapper">Hi,<br /> How to generate space vector modulation in LTspice ?</div>]]></content:encoded> <slash:comments>5</slash:comments> </item> <item> <title>driver</title> <pubDate>Sun, 16 Feb 2025 16:14:21 +0000</pubDate> <link>https://www.edaboard.com/threads/driver.414043/</link> <guid isPermaLink="false">414043</guid> <author>invalid@example.com (bloodynine)</author> <category domain="https://www.edaboard.com/forums/analog-circuit-design.38/"><![CDATA[Analog Circuit Design]]></category> <dc:creator>bloodynine</dc:creator> <content:encoded><![CDATA[<div class="bbWrapper">how do you decide about better driving strength or better drivers from common source common gate and source follower? can you provide any reference in which driving strength or drivers topic is discussed from basic ?</div>]]></content:encoded> <slash:comments>2</slash:comments> </item> <item> <title>noise shaping sar adc FFT simulation in cadence</title> <pubDate>Sun, 16 Feb 2025 14:01:04 +0000</pubDate> <link>https://www.edaboard.com/threads/noise-shaping-sar-adc-fft-simulation-in-cadence.414044/</link> <guid isPermaLink="false">414044</guid> <author>invalid@example.com (the8thhabit)</author> <category domain="https://www.edaboard.com/forums/analog-circuit-design.38/"><![CDATA[Analog Circuit Design]]></category> <dc:creator>the8thhabit</dc:creator> <content:encoded><![CDATA[<div class="bbWrapper">Hello!<br /> I am designing a noise shaping SAR ADC in CADENCE and I have a question in FFT simulation.<br /> I used a 10-bit CDAC, OSR = 4, fs = 20MHz, sampling count = 2048.<br /> Then the bandwidth is fs/2/OSR, so 2.5 MHz.<br /> If I set k=31 in the equation k*fs/sample count, the fin (input frequency) would be 0.302MHz.<br /> I ran the FFT simulation until 2048*50ns = 102.4us and then ran the FFT simulation.<br /> <br /> In this case, I was wondering if it is correct to set the end frequency to 2.5MHz, which is the bandwidth, as...<br /> <br /> <a href="https://www.edaboard.com/threads/noise-shaping-sar-adc-fft-simulation-in-cadence.414044/" class="link link--internal">Read more</a></div>]]></content:encoded> <slash:comments>0</slash:comments> </item> <item> <title>How to measure a voltage beneath an IC package?</title> <pubDate>Sun, 16 Feb 2025 11:47:08 +0000</pubDate> <link>https://www.edaboard.com/threads/how-to-measure-a-voltage-beneath-an-ic-package.413965/</link> <guid isPermaLink="false">413965</guid> <author>invalid@example.com (jjzn)</author> <category domain="https://www.edaboard.com/forums/hobby-circuits-and-small-projects-problems.23/"><![CDATA[Hobby Circuits and Small Projects Problems]]></category> <dc:creator>jjzn</dc:creator> <content:encoded><![CDATA[<div class="bbWrapper">I am just brainstorming something beyond my course project ....<br /> <br /> There are a few ICs supplied by LDOs on a PCB.<br /> ICs are in LGA, BGA, or other package types alike.<br /> When the IC is running in its active mode, how do you monitor the voltage waveform at a particular load pin beneath the IC package?<br /> <br /> This is not difficult to do in my course project, because my course design is as simple as DIP or QFN, where load pins are exposed.<br /> I am just thinking beyond this ....<br /> Appreciate your comments.</div>]]></content:encoded> <slash:comments>9</slash:comments> </item> <item> <title>Problem in Running SX1281 Semtech lora IC with Stm32 UART protocol</title> <pubDate>Sun, 16 Feb 2025 09:08:32 +0000</pubDate> <link>https://www.edaboard.com/threads/problem-in-running-sx1281-semtech-lora-ic-with-stm32-uart-protocol.413895/</link> <guid isPermaLink="false">413895</guid> <author>invalid@example.com (mettiblack72)</author> <category domain="https://www.edaboard.com/forums/microcontrollers.31/"><![CDATA[Microcontrollers]]></category> <dc:creator>mettiblack72</dc:creator> <content:encoded><![CDATA[<div class="bbWrapper">hello, <br /> I'm trying to run sx1281 lora ic from semtech with stm32 by uart protocol<br /> 1- at the first I reset hardware by reset pin and then<br /> 2- send getstatus() command to get mode of ic , for this command I examine BUSY pin to be Low after that I transmit getstatus() command, ic response me STDBY_RC mode and it's ok<br /> 3- depends on datasheet then I should to setpackettype(), when I send setpackettype() command or any SET command, voltage of BUSY pin goes to high and remain high!! and I can't send...<br /> <br /> <a href="https://www.edaboard.com/threads/problem-in-running-sx1281-semtech-lora-ic-with-stm32-uart-protocol.413895/" class="link link--internal">Read more</a></div>]]></content:encoded> <slash:comments>9</slash:comments> </item> <item> <title>Why Does Verilog Remember Number of Bits from one Input Parameter to the Next?</title> <pubDate>Sun, 16 Feb 2025 07:34:10 +0000</pubDate> <link>https://www.edaboard.com/threads/why-does-verilog-remember-number-of-bits-from-one-input-parameter-to-the-next.414041/</link> <guid isPermaLink="false">414041</guid> <author>invalid@example.com (kvnsmnsn)</author> <category domain="https://www.edaboard.com/forums/pld-spld-gal-cpld-fpga-design.30/"><![CDATA[PLD, SPLD, GAL, CPLD, FPGA Design]]></category> <dc:creator>kvnsmnsn</dc:creator> <content:encoded><![CDATA[<div class="bbWrapper">I had a question about how Verilog works, so I built a dummy design and its testbench as follows. The design is:<br /> <div class="bbCodeBlock bbCodeBlock--screenLimited bbCodeBlock--code"> <div class="bbCodeBlock-title"> Code: </div> <div class="bbCodeBlock-content" dir="ltr"> <pre class="bbCodeCode" dir="ltr" data-xf-init="code-block" data-lang=""><code>// (c) Kevin Simonson 2025 module lfRg ( output rslt , input [ 2:0] abc , def); assign rslt = abc[ 0] == def[ 0] & abc[ 1] == def[ 1] & abc[ 2] == def[ 2]; endmodule</code></pre> </div> </div>and the testbench is:<br /> <div class="bbCodeBlock bbCodeBlock--screenLimited bbCodeBlock--code"> <div class="bbCodeBlock-title"> Code: </div> <div class="bbCodeBlock-content" dir="ltr"> <pre class="bbCodeCode" dir="ltr" data-xf-init="code-block" data-lang=""><code>// (c) Kevin Simonson 2025 module t_lfRg; reg [ 2:0] abc; reg [ 2:0] def; wire rslt; lfRg lr( rslt, abc, def)...</code></pre> </div> </div><br /> <a href="https://www.edaboard.com/threads/why-does-verilog-remember-number-of-bits-from-one-input-parameter-to-the-next.414041/" class="link link--internal">Read more</a></div>]]></content:encoded> <slash:comments>2</slash:comments> </item> <item> <title>DC-DC recomendations for PMA5-83-2W+ sequencer</title> <pubDate>Sun, 16 Feb 2025 06:37:30 +0000</pubDate> <link>https://www.edaboard.com/threads/dc-dc-recomendations-for-pma5-83-2w-sequencer.411376/</link> <guid isPermaLink="false">411376</guid> <author>invalid@example.com (yefj)</author> <category domain="https://www.edaboard.com/forums/analog-circuit-design.38/"><![CDATA[Analog Circuit Design]]></category> <dc:creator>yefj</dc:creator> <content:encoded><![CDATA[<div class="bbWrapper">Hello,I need to build a sequencer for by the guidelines below..<br /> Given that i have +-12V voltage supply.<br /> questions:<br /> 1.What DC-DC do you reccomend me to use to get the +5V needed for the amplifier?<br /> 2.given that i control the system with microcontroller , what is the best wat to measure the current going threw the amplifier and control the Vg1 accordingly?<br /> Thanks.<br /> <a href="https://www.minicircuits.com/pdfs/PMA5-83-2W+.pdf" target="_blank" class="link link--external" rel="nofollow ugc noopener">https://www.minicircuits.com/pdfs/PMA5-83-2W+.pdf</a><br /> <img src="http://www.edaboard.com/attachments/1718384432770-png.191581/" class="bbImage " style="" alt="1718384432770.png" title="1718384432770.png" width="1740" height="726" loading="lazy" /></div>]]></content:encoded> <slash:comments>26</slash:comments> </item> <item> <title>Jittering state relay</title> <pubDate>Sun, 16 Feb 2025 06:01:28 +0000</pubDate> <link>https://www.edaboard.com/threads/jittering-state-relay.413904/</link> <guid isPermaLink="false">413904</guid> <author>invalid@example.com (ABR2)</author> <category domain="https://www.edaboard.com/forums/analog-circuit-design.38/"><![CDATA[Analog Circuit Design]]></category> <dc:creator>ABR2</dc:creator> <content:encoded><![CDATA[<div class="bbWrapper">I am looking for some help regarding how to control a 12V 5pin relay switch to stop jittering when it reaches its critical position of ON to OFF. <br /> The relay is controlled by a LDR and BC 547. <br /> Is there any other components that need to be added to get a clean change of state.<br /> The project is to control a outdoor pump thru LDR</div>]]></content:encoded> <slash:comments>13</slash:comments> </item> <item> <title>How to fix Bandgap Iref?</title> <pubDate>Sun, 16 Feb 2025 04:37:09 +0000</pubDate> <link>https://www.edaboard.com/threads/how-to-fix-bandgap-iref.414026/</link> <guid isPermaLink="false">414026</guid> <author>invalid@example.com (KGF KING)</author> <category domain="https://www.edaboard.com/forums/analog-integrated-circuit-ic-design-layout-and-more.39/"><![CDATA[Analog Integrated Circuit (IC) Design, Layout and more]]></category> <dc:creator>KGF KING</dc:creator> <content:encoded><![CDATA[<div class="bbWrapper">Hi All,<br /> <br /> I鈥檓 trying to design a sub-1V bandgap that generates constant Iref = 0.5uA and Vref = 0.5V. I have attached my circuit below. The problem I鈥檓 facing right now is I鈥檓 able to generate constant Vref approx. to 0.5V but my Iref is looking like below(waveform attached) at VDD=1.2V. Initially I tried to swap the op-amp with ideal because doubt of my input offset one but seems like the op-amp is not the case. I don鈥檛 know how to troubleshoot the root cause of this. Can anyone help me how...<br /> <br /> <a href="https://www.edaboard.com/threads/how-to-fix-bandgap-iref.414026/" class="link link--internal">Read more</a></div>]]></content:encoded> <slash:comments>5</slash:comments> </item> </channel> </rss>