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</div></div></div><div class="site-inner"><div class="wrap"><div class="content-sidebar-wrap"><main class="content"><article class="type-post entry has-post-thumbnail" aria-label="How to optimize Arduino for low power design"><header class="entry-header"><p class="entry-meta">By <span class="entry-author"><a href="https://www.engineersgarage.com/author/nikhil-agnihotri/" class="entry-author-link" rel="author"><span class="entry-author-name">Nikhil Agnihotri</span></a></span> <time class="entry-time">June 20, 2024</time> </p><h2 class="entry-title"><a class="entry-title-link" rel="bookmark" href="https://www.engineersgarage.com/reducing-arduino-power-consumption-sleep-modes/">How to optimize Arduino for low power design</a></h2> </header><div class="entry-content"><a class="entry-image-link" href="https://www.engineersgarage.com/reducing-arduino-power-consumption-sleep-modes/" aria-hidden="true" tabindex="-1"><img width="268" height="170" src="https://www.engineersgarage.com/wp-content/uploads/2022/08/dreamstime_s_104079696-268x170.jpg" class="alignleft post-image entry-image wp-image-77073" alt="low power design" decoding="async" /></a><p>Power consumption of the embedded controller is a primary concern in low power design. Arduino boards are often used in devices that rely on battery or solar charging. Such devices often deploy far from the power line to have periodic battery replacement or are mobile devices designed for periodic charging cycles. In such a case,…</p> </div><footer class="entry-footer"></footer></article><article class="type-post entry has-post-thumbnail" aria-label="How to design pick-and-place robot using Arduino"><header class="entry-header"><p class="entry-meta">By <span class="entry-author"><a href="https://www.engineersgarage.com/author/abhatt/" class="entry-author-link" rel="author"><span class="entry-author-name">Ashutosh Bhatt</span></a></span> <time class="entry-time">June 19, 2024</time> </p><h2 class="entry-title"><a class="entry-title-link" rel="bookmark" href="https://www.engineersgarage.com/how-to-design-an-omnidirectional-pick-and-place-robot-using-arduino/">How to design pick-and-place robot using Arduino</a></h2> </header><div class="entry-content"><a class="entry-image-link" href="https://www.engineersgarage.com/how-to-design-an-omnidirectional-pick-and-place-robot-using-arduino/" aria-hidden="true" tabindex="-1"><img width="268" height="170" src="https://www.engineersgarage.com/wp-content/uploads/2024/04/Robot-control-operation-rotator-268x170.png" class="alignleft post-image entry-image wp-image-80922" alt="" decoding="async" loading="lazy" /></a><p>In this project, we’ll design an omnidirectional, moving pick-and-place robot. First, let’s cover how the robot is built. The robot’s build As shown in Figure 1, the robot consists of two sections: An omnidirectional moving platform A robotic arm The omnidirectional platform The robot is built using one circular wooden plate, three dc gear motors,…</p> </div><footer class="entry-footer"></footer></article><article class="type-post entry has-post-thumbnail" aria-label="How to use the TCS230/TCS3200 color-recognition sensor with Arduino"><header class="entry-header"><p class="entry-meta">By <span class="entry-author"><a href="https://www.engineersgarage.com/author/nikhil-agnihotri/" class="entry-author-link" rel="author"><span class="entry-author-name">Nikhil Agnihotri</span></a></span> <time class="entry-time">June 19, 2024</time> </p><h2 class="entry-title"><a class="entry-title-link" rel="bookmark" href="https://www.engineersgarage.com/how-to-detect-diffrent-colors-using-tcs230-tcs3200-sensor-with-arduino/">How to use the TCS230/TCS3200 color-recognition sensor with Arduino</a></h2> </header><div class="entry-content"><a class="entry-image-link" href="https://www.engineersgarage.com/how-to-detect-diffrent-colors-using-tcs230-tcs3200-sensor-with-arduino/" aria-hidden="true" tabindex="-1"><img width="268" height="170" src="https://www.engineersgarage.com/wp-content/uploads/2024/01/Color-detection-sensors-rotator-268x170.png" class="alignleft post-image entry-image wp-image-80284" alt="" decoding="async" loading="lazy" srcset="https://www.engineersgarage.com/wp-content/uploads/2024/01/Color-detection-sensors-rotator-268x170.png 268w, https://www.engineersgarage.com/wp-content/uploads/2024/01/Color-detection-sensors-rotator-300x189.png 300w, https://www.engineersgarage.com/wp-content/uploads/2024/01/Color-detection-sensors-rotator-768x483.png 768w, https://www.engineersgarage.com/wp-content/uploads/2024/01/Color-detection-sensors-rotator.png 795w" sizes="auto, (max-width: 268px) 100vw, 268px" /></a><p>Color detection is the process of identifying and distinguishing colors within an image, video, scene, or object. Many embedded and robotic applications require this feature, as it’s useful for sorting, selection, test strip reading, path determination, and more. Two standard sensors used for color detection include TCS230 or TCS3200. TCS3200 recognizes various colors based on…</p> </div><footer class="entry-footer"></footer></article><article class="type-post entry has-post-thumbnail" aria-label="Sensor value (data) display on TFT LCD using Arduino – Part III"><header class="entry-header"><p class="entry-meta">By <span class="entry-author"><a href="https://www.engineersgarage.com/author/abhatt/" class="entry-author-link" rel="author"><span class="entry-author-name">Ashutosh Bhatt</span></a></span> <time class="entry-time">June 19, 2024</time> </p><h2 class="entry-title"><a class="entry-title-link" rel="bookmark" href="https://www.engineersgarage.com/sensor-value-data-display-on-tft-lcd-using-arduino-part-iii/">Sensor value (data) display on TFT LCD using Arduino – Part III</a></h2> </header><div class="entry-content"><a class="entry-image-link" href="https://www.engineersgarage.com/sensor-value-data-display-on-tft-lcd-using-arduino-part-iii/" aria-hidden="true" tabindex="-1"><img width="268" height="170" src="https://www.engineersgarage.com/wp-content/uploads/2022/10/MLX-and-TFT-LCD-268x170.jpg" class="alignleft post-image entry-image wp-image-77446" alt="" decoding="async" loading="lazy" /></a><p>Contactless body temperature measurement using MLX90614 sensor In the previous two articles of this tutorial series, I demonstrated how to display analog sensor data (like POT, LM35, soil moisture sensor, etc.) or smart digital sensor (DHT11) data on TFT LCD. In this third article, I will explain how to display body temperature on TFT LCD. It…</p> </div><footer class="entry-footer"></footer></article><article class="type-post entry has-post-thumbnail" aria-label="Arduino piezo buzzer alarm with LDR(light dependent resistor)/photoresistor"><header class="entry-header"><p class="entry-meta">By <span class="entry-author"><a href="https://www.engineersgarage.com/author/eg-projects/" class="entry-author-link" rel="author"><span class="entry-author-name">EG Projects</span></a></span> <time class="entry-time">June 19, 2024</time> </p><h2 class="entry-title"><a class="entry-title-link" rel="bookmark" href="https://www.engineersgarage.com/ldr-with-piezo-sensor/">Arduino piezo buzzer alarm with LDR(light dependent resistor)/photoresistor</a></h2> </header><div class="entry-content"><a class="entry-image-link" href="https://www.engineersgarage.com/ldr-with-piezo-sensor/" aria-hidden="true" tabindex="-1"><img width="268" height="170" src="https://www.engineersgarage.com/wp-content/uploads/2019/10/buzzer-arduino-led-and-ldr_orig-2-268x170.jpg" class="alignleft post-image entry-image wp-image-59903" alt="" decoding="async" loading="lazy" /></a><p>This is a simple project on arduino, ldr(light dependent resistor)/photoresistor sensor and piezo buzzer. Piezo buzzer output sound level will variate by arduino depending on the intensity of light thrown on ldr/light sensor. An led will also fade by arduino depending on the intensity of light thrown on photoresistor. The diy project is same like…</p> </div><footer class="entry-footer"></footer></article><article class="type-post entry has-post-thumbnail" aria-label="How to enroll and match fingerprint templates with Adafruit and R30X fingerprint scanner"><header class="entry-header"><p class="entry-meta">By <span class="entry-author"><a href="https://www.engineersgarage.com/author/nikhil-agnihotri/" class="entry-author-link" rel="author"><span class="entry-author-name">Nikhil Agnihotri</span></a></span> <time class="entry-time">June 19, 2024</time> </p><h2 class="entry-title"><a class="entry-title-link" rel="bookmark" href="https://www.engineersgarage.com/arduino-adafruit-r30x-r307-fingerprint-scanner/">How to enroll and match fingerprint templates with Adafruit and R30X fingerprint scanner</a></h2> </header><div class="entry-content"><a class="entry-image-link" href="https://www.engineersgarage.com/arduino-adafruit-r30x-r307-fingerprint-scanner/" aria-hidden="true" tabindex="-1"><img width="268" height="170" src="https://www.engineersgarage.com/wp-content/uploads/2021/09/fingerprint-scanners-featured-268x170.png" class="alignleft post-image entry-image wp-image-65011" alt="R30X fingerprint scanner" decoding="async" loading="lazy" /></a><p>Biometric devices are the backbone of modern security and access systems. The most commonly used biometric device is a fingerprint scanner. Fingerprints are unique identifiers that cannot be easily faked. Optical fingerprint sensors are widely used in security systems as these are low-cost compared to capacitive and ultrasonic scanners. Optical fingerprint sensors digitize fingerprints by…</p> </div><footer class="entry-footer"></footer></article><article class="type-post entry has-post-thumbnail" aria-label="Sensor value display on TFT LCD using Arduino: Part I"><header class="entry-header"><p class="entry-meta">By <span class="entry-author"><a href="https://www.engineersgarage.com/author/abhatt/" class="entry-author-link" rel="author"><span class="entry-author-name">Ashutosh Bhatt</span></a></span> <time class="entry-time">June 19, 2024</time> </p><h2 class="entry-title"><a class="entry-title-link" rel="bookmark" href="https://www.engineersgarage.com/sensor-value-display-on-tft-lcd-using-arduino-part-i/">Sensor value display on TFT LCD using Arduino: Part I</a></h2> </header><div class="entry-content"><a class="entry-image-link" href="https://www.engineersgarage.com/sensor-value-display-on-tft-lcd-using-arduino-part-i/" aria-hidden="true" tabindex="-1"><img width="268" height="170" src="https://www.engineersgarage.com/wp-content/uploads/2022/08/TFT-and-POT-small-268x170.jpg" class="alignleft post-image entry-image wp-image-77084" alt="" decoding="async" loading="lazy" /></a><p>Displaying potentiometer value and temperature using LM35 In my previous tutorial series on displaying sensor data (value) on OLED display, I have explained how to display values of different sensors like a potentiometer, LM35, soil moisture sensor, DHT, HC SR04, etc. on a tiny 1” OLED display. This time, I will demonstrate and explain how…</p> </div><footer class="entry-footer"></footer></article><article class="type-post entry has-post-thumbnail" aria-label="How to play MP3 files on Arduino using the DFPlayer Mini or the MP3-TF-16P"><header class="entry-header"><p class="entry-meta">By <span class="entry-author"><a href="https://www.engineersgarage.com/author/nikhil-agnihotri/" class="entry-author-link" rel="author"><span class="entry-author-name">Nikhil Agnihotri</span></a></span> <time class="entry-time">June 11, 2024</time> </p><h2 class="entry-title"><a class="entry-title-link" rel="bookmark" href="https://www.engineersgarage.com/arduino-dfplayer-mini-mp3-tf-16p-mp3-playing/">How to play MP3 files on Arduino using the DFPlayer Mini or the MP3-TF-16P</a></h2> </header><div class="entry-content"><a class="entry-image-link" href="https://www.engineersgarage.com/arduino-dfplayer-mini-mp3-tf-16p-mp3-playing/" aria-hidden="true" tabindex="-1"><img width="268" height="170" src="https://www.engineersgarage.com/wp-content/uploads/2024/06/MP3audio-on-Arduino-rotator-268x170.png" class="alignleft post-image entry-image wp-image-81227" alt="" decoding="async" loading="lazy" /></a><p>Including an audio option with an electronic or Internet-of-Things (IoT) project is often an ideal addition. However, microcontrollers cannot process MP3 files, which is the most common audio file format. Fortunately, there is a solution. It is possible to play MP3 audio files on Arduino using dedicated MP3 decoders like the DFPlayer Mini or MP3-TF-16P.…</p> </div><footer class="entry-footer"></footer></article><article class="type-post entry has-post-thumbnail" aria-label="How to design a weighing scale using Arduino"><header class="entry-header"><p class="entry-meta">By <span class="entry-author"><a href="https://www.engineersgarage.com/author/nikhil-agnihotri/" class="entry-author-link" rel="author"><span class="entry-author-name">Nikhil Agnihotri</span></a></span> <time class="entry-time">June 4, 2024</time> </p><h2 class="entry-title"><a class="entry-title-link" rel="bookmark" href="https://www.engineersgarage.com/arduino-hx711-digital-weighing-scale/">How to design a weighing scale using Arduino</a></h2> </header><div class="entry-content"><a class="entry-image-link" href="https://www.engineersgarage.com/arduino-hx711-digital-weighing-scale/" aria-hidden="true" tabindex="-1"><img width="268" height="170" src="https://www.engineersgarage.com/wp-content/uploads/2024/05/Weighing-scale-ROTATOR-268x170.png" class="alignleft post-image entry-image wp-image-81176" alt="" decoding="async" loading="lazy" srcset="https://www.engineersgarage.com/wp-content/uploads/2024/05/Weighing-scale-ROTATOR-268x170.png 268w, https://www.engineersgarage.com/wp-content/uploads/2024/05/Weighing-scale-ROTATOR-778x495.png 778w" sizes="auto, (max-width: 268px) 100vw, 268px" /></a><p>Weighing scales are frequently used to measure the weight of goods, such as bulk items and raw materials. We sometimes use them at grocery stores to weigh produce or at home to measure our weight. Building a weighing scale is no simple task. It involves a combination of load cells, amplifier circuits, and microcontrollers or…</p> </div><footer class="entry-footer"></footer></article><article class="type-post entry has-post-thumbnail" aria-label="How to design an OTP-based door lock"><header class="entry-header"><p class="entry-meta">By <span class="entry-author"><a href="https://www.engineersgarage.com/author/nikhil-agnihotri/" class="entry-author-link" rel="author"><span class="entry-author-name">Nikhil Agnihotri</span></a></span> <time class="entry-time">May 28, 2024</time> </p><h2 class="entry-title"><a class="entry-title-link" rel="bookmark" href="https://www.engineersgarage.com/otp-based-door-lock-system-arduino/">How to design an OTP-based door lock</a></h2> </header><div class="entry-content"><a class="entry-image-link" href="https://www.engineersgarage.com/otp-based-door-lock-system-arduino/" aria-hidden="true" tabindex="-1"><img width="268" height="170" src="https://www.engineersgarage.com/wp-content/uploads/2024/05/Door-lock-rotator-268x170.png" class="alignleft post-image entry-image wp-image-81144" alt="" decoding="async" loading="lazy" /></a><p>Today, mobile-based authentication to verify a person’s identity is common. Online service providers often use it for access to services, approval of transactions, or to change a user’s credentials. Imagine using a similar mobile-based authentication to enter your home, office, or any private space. It’s possible. In this project, we’ll design a mobile-based access system…</p> </div><footer class="entry-footer"></footer></article><article class="type-post entry has-post-thumbnail" aria-label="How to design an automatic streetlight system using Arduino"><header class="entry-header"><p class="entry-meta">By <span class="entry-author"><a href="https://www.engineersgarage.com/author/abhatt/" class="entry-author-link" rel="author"><span class="entry-author-name">Ashutosh Bhatt</span></a></span> <time class="entry-time">May 14, 2024</time> </p><h2 class="entry-title"><a class="entry-title-link" rel="bookmark" href="https://www.engineersgarage.com/how-to-design-an-automatic-streetlight-system-using-arduino/">How to design an automatic streetlight system using Arduino</a></h2> </header><div class="entry-content"><a class="entry-image-link" href="https://www.engineersgarage.com/how-to-design-an-automatic-streetlight-system-using-arduino/" aria-hidden="true" tabindex="-1"><img width="268" height="170" src="https://www.engineersgarage.com/wp-content/uploads/2024/05/ROTATOR-smart-street-light-circuit-268x170.jpg" class="alignleft post-image entry-image wp-image-81055" alt="" decoding="async" loading="lazy" /></a><p>In this project, we’ll design an automatic, energy-efficient streetlight system using Arduino. A streetlight will automatically turn on when the outside ambient light falls below a certain threshold, as evening turns to night. They turn off when sufficient light returns in the morning to conserve energy. So, these streetlights only power on when needed. The…</p> </div><footer class="entry-footer"></footer></article><article class="type-post entry has-post-thumbnail" aria-label="Arduino compatible coding 01: Arduino MCU family"><header class="entry-header"><p class="entry-meta">By <span class="entry-author"><a href="https://www.engineersgarage.com/author/nikhil-agnihotri/" class="entry-author-link" rel="author"><span class="entry-author-name">Nikhil Agnihotri</span></a></span> <time class="entry-time">April 7, 2024</time> </p><h2 class="entry-title"><a class="entry-title-link" rel="bookmark" href="https://www.engineersgarage.com/articles-arduino-arduino-pro-microcontroller-boards/">Arduino compatible coding 01: Arduino MCU family</a></h2> </header><div class="entry-content"><a class="entry-image-link" href="https://www.engineersgarage.com/articles-arduino-arduino-pro-microcontroller-boards/" aria-hidden="true" tabindex="-1"><img width="268" height="170" src="https://www.engineersgarage.com/wp-content/uploads/2020/03/arduino-631977_1280-268x170.jpg" class="alignleft post-image entry-image wp-image-60849" alt="" decoding="async" loading="lazy" /></a><p>Embedded electronics are in a countless number of devices and appliances, with microcontrollers at the heart of the operation. A microcontroller is a compact integrated circuit that controls a specific operation in an embedded system. There was a time when only BASIC stamp microcontrollers, with a simple interpreter, were available for designing, prototyping, and testing…</p> </div><footer class="entry-footer"></footer></article><article class="type-post entry has-post-thumbnail" aria-label="Arduino compatible coding 02: Getting started with Arduino"><header class="entry-header"><p class="entry-meta">By <span class="entry-author"><a href="https://www.engineersgarage.com/author/nikhil-agnihotri/" class="entry-author-link" rel="author"><span class="entry-author-name">Nikhil Agnihotri</span></a></span> <time class="entry-time">April 7, 2024</time> </p><h2 class="entry-title"><a class="entry-title-link" rel="bookmark" href="https://www.engineersgarage.com/articles-getting-started-with-arduino-uno-and-arduino-ide/">Arduino compatible coding 02: Getting started with Arduino</a></h2> </header><div class="entry-content"><a class="entry-image-link" href="https://www.engineersgarage.com/articles-getting-started-with-arduino-uno-and-arduino-ide/" aria-hidden="true" tabindex="-1"><img width="268" height="170" src="https://www.engineersgarage.com/wp-content/uploads/2020/03/Arduino-268x170.jpg" class="alignleft post-image entry-image wp-image-60855" alt="" decoding="async" loading="lazy" /></a><p>Arduino are single-board microcontrollers that are easily programmable through a USB connection. They are used with electronics to design embedded system prototypes, the Internet-of-Things (IoT), and electronic gadgets. Much like other microcontrollers, Arduino provides software-backed computing and embedded control to basic electronics applications. That means getting started with Arduino is no different than with other…</p> </div><footer class="entry-footer"></footer></article><article class="type-post entry has-post-thumbnail" aria-label="Arduino compatible coding 03: Basics of Arduino sketches and Embedded C"><header class="entry-header"><p class="entry-meta">By <span class="entry-author"><a href="https://www.engineersgarage.com/author/nikhil-agnihotri/" class="entry-author-link" rel="author"><span class="entry-author-name">Nikhil Agnihotri</span></a></span> <time class="entry-time">April 7, 2024</time> </p><h2 class="entry-title"><a class="entry-title-link" rel="bookmark" href="https://www.engineersgarage.com/articles-basics-of-arduino-sketches-arduino-c/">Arduino compatible coding 03: Basics of Arduino sketches and Embedded C</a></h2> </header><div class="entry-content"><a class="entry-image-link" href="https://www.engineersgarage.com/articles-basics-of-arduino-sketches-arduino-c/" aria-hidden="true" tabindex="-1"><img width="268" height="170" src="https://www.engineersgarage.com/wp-content/uploads/2020/03/Arduino-1-268x170.jpg" class="alignleft post-image entry-image wp-image-60877" alt="" decoding="async" loading="lazy" /></a><p>The previous tutorial included a discussion about the tools and components necessary to get started with Arduino. However, before starting with Arduino UNO (or any other Arduino board) — and experimenting with hardware projects on various sensors, actuators, and modules — it’s important to get through the basics of Arduino sketches and the embedded C…</p> </div><footer class="entry-footer"></footer></article><article class="type-post entry has-post-thumbnail" aria-label="Arduino compatible coding 04: Interfacing and driving LED by digital output"><header class="entry-header"><p class="entry-meta">By <span class="entry-author"><a href="https://www.engineersgarage.com/author/nikhil-agnihotri/" class="entry-author-link" rel="author"><span class="entry-author-name">Nikhil Agnihotri</span></a></span> <time class="entry-time">April 7, 2024</time> </p><h2 class="entry-title"><a class="entry-title-link" rel="bookmark" href="https://www.engineersgarage.com/articles-arduino-digital-output-led-driver-led-blinking/">Arduino compatible coding 04: Interfacing and driving LED by digital output</a></h2> </header><div class="entry-content"><a class="entry-image-link" href="https://www.engineersgarage.com/articles-arduino-digital-output-led-driver-led-blinking/" aria-hidden="true" tabindex="-1"><img width="268" height="170" src="https://www.engineersgarage.com/wp-content/uploads/2020/03/Light-on-268x170.jpg" class="alignleft post-image entry-image wp-image-60896" alt="" decoding="async" loading="lazy" /></a><p>In the previous tutorial, we discussed the basics about Arduino sketches, with a a quick Arduino language reference. Now, it’s time to get our hands dirty. Interfacing LED and driving digital output from a source is the “Hello World” of embedded systems. As discussed in the previous tutorial, a microcontroller interfaces and interacts with other…</p> </div><footer class="entry-footer"></footer></article><article class="type-post entry has-post-thumbnail" aria-label="Arduino compatible coding 05: Interfacing buttons for digital input"><header class="entry-header"><p class="entry-meta">By <span class="entry-author"><a href="https://www.engineersgarage.com/author/nikhil-agnihotri/" class="entry-author-link" rel="author"><span class="entry-author-name">Nikhil Agnihotri</span></a></span> <time class="entry-time">April 7, 2024</time> </p><h2 class="entry-title"><a class="entry-title-link" rel="bookmark" href="https://www.engineersgarage.com/articles-arduino-digital-input-interfacing-buttons/">Arduino compatible coding 05: Interfacing buttons for digital input</a></h2> </header><div class="entry-content"><a class="entry-image-link" href="https://www.engineersgarage.com/articles-arduino-digital-input-interfacing-buttons/" aria-hidden="true" tabindex="-1"><img width="268" height="170" src="https://www.engineersgarage.com/wp-content/uploads/2020/03/System-CLK-268x170.jpg" class="alignleft post-image entry-image wp-image-60922" alt="" decoding="async" loading="lazy" /></a><p>In the previous tutorial, we discussed digital output from Arduino to drive an LED. A controller can interface and interact with other devices in five ways: digital output, digital input, analog output, analog input, and serial communication. In this tutorial, we will use digital input from Arduino to read the state of a tactile switch…</p> </div><footer class="entry-footer"></footer></article><article class="type-post entry has-post-thumbnail" aria-label="Arduino compatible coding 06: Analog output (PWM) on Arduino and LED fading"><header class="entry-header"><p class="entry-meta">By <span class="entry-author"><a href="https://www.engineersgarage.com/author/nikhil-agnihotri/" class="entry-author-link" rel="author"><span class="entry-author-name">Nikhil Agnihotri</span></a></span> <time class="entry-time">April 7, 2024</time> </p><h2 class="entry-title"><a class="entry-title-link" rel="bookmark" href="https://www.engineersgarage.com/articles-arduino-analog-output-led-fading/">Arduino compatible coding 06: Analog output (PWM) on Arduino and LED fading</a></h2> </header><div class="entry-content"><a class="entry-image-link" href="https://www.engineersgarage.com/articles-arduino-analog-output-led-fading/" aria-hidden="true" tabindex="-1"><img width="268" height="170" src="https://www.engineersgarage.com/wp-content/uploads/2020/04/Voltage-chart-268x170.jpg" class="alignleft post-image entry-image wp-image-61010" alt="" decoding="async" loading="lazy" /></a><p>In the previous tutorial, we discussed the digital input process for using Arduino. We also explained push buttons (momentary type buttons) and how to use them for data or command input via a digital input. Any controller can interface and interact with other electronic devices in five ways: digital output, digital input, analog output, analog input,…</p> </div><footer class="entry-footer"></footer></article><article class="type-post entry has-post-thumbnail" aria-label="How to turn Arduino into 16-bit IO port"><header class="entry-header"><p class="entry-meta">By <span class="entry-author"><a href="https://www.engineersgarage.com/author/abhatt/" class="entry-author-link" rel="author"><span class="entry-author-name">Ashutosh Bhatt</span></a></span> <time class="entry-time">March 26, 2024</time> </p><h2 class="entry-title"><a class="entry-title-link" rel="bookmark" href="https://www.engineersgarage.com/how-to-turn-arduino-into-16-bit-io-port/">How to turn Arduino into 16-bit IO port</a></h2> </header><div class="entry-content"><a class="entry-image-link" href="https://www.engineersgarage.com/how-to-turn-arduino-into-16-bit-io-port/" aria-hidden="true" tabindex="-1"><img width="268" height="170" src="https://www.engineersgarage.com/wp-content/uploads/2024/03/Arduino-16-pin-IO-port-rotator-268x170.png" class="alignleft post-image entry-image wp-image-80740" alt="" decoding="async" loading="lazy" /></a><p>In this project, we’ll design a 16-bit IO port (input-output port) library for Arduino. It’s possible to send direct 16-bit data to any Arduino board using this library. It connects any of Arduino’s 16 pins, so they work as a 16-bit IO port. First, you must select 16 pins from Arduino to combine as the…</p> </div><footer class="entry-footer"></footer></article><article class="type-post entry has-post-thumbnail" aria-label="Arduino-based optical proximity sensor using IR LEDs"><header class="entry-header"><p class="entry-meta">By <span class="entry-author"><a href="https://www.engineersgarage.com/author/nikhil-agnihotri/" class="entry-author-link" rel="author"><span class="entry-author-name">Nikhil Agnihotri</span></a></span> <time class="entry-time">March 22, 2024</time> </p><h2 class="entry-title"><a class="entry-title-link" rel="bookmark" href="https://www.engineersgarage.com/arduino-ir-led-ir-photodiode-proximity-sensor/">Arduino-based optical proximity sensor using IR LEDs</a></h2> </header><div class="entry-content"><a class="entry-image-link" href="https://www.engineersgarage.com/arduino-ir-led-ir-photodiode-proximity-sensor/" aria-hidden="true" tabindex="-1"><img width="268" height="170" src="https://www.engineersgarage.com/wp-content/uploads/2020/12/IR-LEDs-featured-268x170.jpg" class="alignleft post-image entry-image wp-image-62529" alt="IR LEDs" decoding="async" loading="lazy" /></a><p>Proximity sensors are used to detect something approaching near. These sensors are useful in many applications like collision avoidance, obstacle detection, path following, touchless sensing, motion detection, and object detection. There are different types of proximity sensors like optical, ultrasonic, capacitive, inductive, and magnetic. The capacitive, inductive, and magnetic proximity sensors are used in specific…</p> </div><footer class="entry-footer"></footer></article><article class="type-post entry has-post-thumbnail" aria-label="Fingerprint-based access control system using Arduino and R307/Adafruit fingerprint sensor"><header class="entry-header"><p class="entry-meta">By <span class="entry-author"><a href="https://www.engineersgarage.com/author/nikhil-agnihotri/" class="entry-author-link" rel="author"><span class="entry-author-name">Nikhil Agnihotri</span></a></span> <time class="entry-time">March 21, 2024</time> </p><h2 class="entry-title"><a class="entry-title-link" rel="bookmark" href="https://www.engineersgarage.com/arduino-r307-ssd1306-oled-fingerprint-access-control-system/">Fingerprint-based access control system using Arduino and R307/Adafruit fingerprint sensor</a></h2> </header><div class="entry-content"><a class="entry-image-link" href="https://www.engineersgarage.com/arduino-r307-ssd1306-oled-fingerprint-access-control-system/" aria-hidden="true" tabindex="-1"><img width="268" height="170" src="https://www.engineersgarage.com/wp-content/uploads/2021/11/dreamstime_s_123735962-268x170.jpg" class="alignleft post-image entry-image wp-image-65209" alt="fingerprint sensor" decoding="async" loading="lazy" /></a><p>Optical fingerprint scanners are prominent security devices nowadays. These scanners are low-cost and easy to use with any embedded hardware platform. The scanners have built-in memory and a controller to store and compare fingerprints. Usually, optical fingerprint scanners have a USB and/or UART port to communicate with external controllers or computers. The scanner handles enrollment…</p> </div><footer class="entry-footer"></footer></article><div class="archive-pagination pagination"><div class="pagination-next alignright"><a href="https://www.engineersgarage.com/arduino/page/2/" class="button">Next ></a></div></div></main><aside class="sidebar sidebar-primary widget-area" role="complementary" aria-label="Primary Sidebar"><section id="search-2" class="widget widget_search"><div class="widget-wrap"><form class="search-form" method="get" action="https://www.engineersgarage.com/" role="search"><input class="search-form-input" type="search" name="s" id="searchform-1" placeholder="Search this website"><input class="search-form-submit" type="submit" value="GO"><meta content="https://www.engineersgarage.com/?s={s}"></form></div></section> <section id="custom_html-5" class="widget_text widget widget_custom_html"><div class="widget_text widget-wrap"><div class="textwidget custom-html-widget"><div align="center"> <div id='div-gpt-eg_sidebar1'> <script> googletag.cmd.push(function() { googletag.display('div-gpt-eg_sidebar1'); }); </script> </div> </div></div></div></section> <section id="custom_html-20" class="widget_text widget widget_custom_html"><div class="widget_text widget-wrap"><h4 class="widget-title widgettitle">EE TECH TOOLBOX</h4> <div class="textwidget custom-html-widget"><center> <div style="display: flex; flex-direction: column; justify-content: center; width: 300px;"> <div align="center"><a href="https://www.eeworldonline.com/tech-toolbox-test-measurement/" target="_blank"><img src="https://www.eeworldonline.com/wp-content/uploads/2024/11/EE-TechToolbox-T_and_M_Page_01-scaled.jpg" alt=“ee tech toolbox”></a></div> <div align="center" style="width: 300px; line-height: 20px; padding-top: 10px;"><span style="font-weight: bold; color: #0c506d; text-align: center; font-size: 20px;">Tech Toolbox: Test & Measurement</span></div> <div align="center" style="line-height: 16px; padding-top: 5px;"><span style="text-align: center; font-size: 16px;"> Everything needs testing and testing needs measurement. 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window.cat_posts_namespace || {}; cat_posts_namespace.layout_wrap_text = cat_posts_namespace.layout_wrap_text || {}; cat_posts_namespace.layout_img_size = cat_posts_namespace.layout_img_size || {}; cat_posts_namespace.layout_wrap_text = { preWrap : function (widget) { jQuery(widget).find('.cat-post-item').each(function(){ var _that = jQuery(this); _that.find('p.cpwp-excerpt-text').addClass('cpwp-wrap-text'); _that.find('p.cpwp-excerpt-text').closest('div').wrap('<div class="cpwp-wrap-text-stage"></div>'); }); return; }, add : function(_this){ var _that = jQuery(_this); if (_that.find('p.cpwp-excerpt-text').height() < _that.find('.cat-post-thumbnail').height()) { _that.find('p.cpwp-excerpt-text').closest('.cpwp-wrap-text-stage').removeClass( "cpwp-wrap-text" ); _that.find('p.cpwp-excerpt-text').addClass( "cpwp-wrap-text" ); }else{ _that.find('p.cpwp-excerpt-text').removeClass( "cpwp-wrap-text" ); _that.find('p.cpwp-excerpt-text').closest('.cpwp-wrap-text-stage').addClass( "cpwp-wrap-text" ); } return; }, handleLazyLoading : function(_this) { var width = jQuery(_this).find('img').width(); if( 0 !== width ){ cat_posts_namespace.layout_wrap_text.add(_this); } else { jQuery(_this).find('img').one("load", function(){ cat_posts_namespace.layout_wrap_text.add(_this); }); } return; }, setClass : function (widget) { // var _widget = jQuery(widget); jQuery(widget).find('.cat-post-item').each(function(){ cat_posts_namespace.layout_wrap_text.handleLazyLoading(this); }); return; } } cat_posts_namespace.layout_img_size = { replace : function(_this){ var _that = jQuery(_this), resp_w = _that.width(), resp_h = _that.height(), orig_w = _that.data('cat-posts-width'), orig_h = _that.data('cat-posts-height'); if( resp_w < orig_w ){ _that.height( resp_w * orig_h / orig_w ); } else { _that.height( '' ); } return; }, handleLazyLoading : function(_this) { var width = jQuery(_this).width(); if( 0 !== width ){ cat_posts_namespace.layout_img_size.replace(_this); } else { jQuery(_this).one("load", function(){ cat_posts_namespace.layout_img_size.replace(_this); }); } return; }, setHeight : function (widget) { jQuery(widget).find('.cat-post-item img').each(function(){ cat_posts_namespace.layout_img_size.handleLazyLoading(this); }); return; } } let widget = jQuery('#category-posts-2-internal'); jQuery( document ).ready(function () { cat_posts_namespace.layout_wrap_text.setClass(widget); cat_posts_namespace.layout_img_size.setHeight(widget); }); jQuery(window).on('load resize', function() { cat_posts_namespace.layout_wrap_text.setClass(widget); cat_posts_namespace.layout_img_size.setHeight(widget); }); // low-end mobile cat_posts_namespace.layout_wrap_text.preWrap(widget); cat_posts_namespace.layout_wrap_text.setClass(widget); cat_posts_namespace.layout_img_size.setHeight(widget); } </script> </body></html>