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Arduino Mega Control Shield
Brandi Oct 23,2026
IntroductionWiring a robot with a mobile base and a robotic arm on top quickly gets messy. You end up with dozens of jumper wires for stepper drivers, endstops, servos and power, all going into an Arduino Mega. A single loose Dupont connector can cost you an afternoon of debugging.To fix this, I designed a custom Arduino Mega shield that works as the central hub of the whole robot. Every subsystem connects to it through a dedicated, keyed connector, so the wiring is clean, repeatable and easy to...
Arduino Sensor Motor
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Matrix panel 8x32 3mm dot
🙂 Oct 17,2026
Hi makers!### **8x32 Common Anode LED Matrix Panel ****Overview**This schematic designs a driver board for a large **8x32 LED display** (8 rows high, 32 columns wide). It is constructed by chaining four standard 8x8 LED matrix modules together. The circuit is designed to be controlled by microcontrollers like Arduino, ESP32, or Raspberry Pi using a standard 3-wire serial interface (SPI-like).**Key Components**1. **Driver ICs (MAX7219CWG):**  *  There are four **MAX7219**...
9th Project Design Contest-Open Theme MAX7219 MATRIX
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GSM Gate Opener at Zero Cost - Open Your Gate with a Free Phone Call - Arduino + SIM900
LA ROSA Oct 16,2026
Open Your Gate / Door / Barrier with a Simple Phone Call - At Zero Cost!Never again lost, broken, or discharged remote controls. This project allows you to open your automatic gate with a simple ring from your mobile phone, with no call cost.How? The board checks the Caller ID. If your number is authorized, it rejects the call (so 0 cost) and triggers the gate relay. Then it calls you back with a confirmation ring. Safe, practical, and economical.More than just a gate opener: It can be used to r...
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Title: Arduino PWM Power Module 12V 4A - Optoisolated with Motor Reverse Relay
LA ROSA Oct 16,2026
High-Power PWM Module for Arduino, MCU and Raspberry Pi - 12V 4A with Direction ControlThis is a robust PWM power module designed to control high-power loads up to 4A at 12V using an IRF540 MOSFET. It is ideal for Arduino, microcontrollers, and Raspberry Pi projects that need to drive DC motors, high-power LEDs, and other inductive loads.Unlike cheap commercial modules, this board features full optoisolation on the control side with two 4N35 optocouplers. Motor noise, spikes and back-EMF will ne...
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Building a UWB Distance Monitoring and Alert System with Arduino UNO
Jain Oct 15,2026
Measuring the distance between two devices is a useful capability in robotics, wireless sensing, and embedded systems. For example, a system might need to detect when an object moves beyond a predefined boundary or trigger an alert when two devices are no longer within a desired distance.One way to implement this functionality is with Ultra-Wideband (UWB) technology. In this project, I've created a distance monitoring and alert system using two REYAX RYUW122_Lite UWB modules, Arduino. 16×2 I2C L...
Arduino DIY IoT
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Surface Mount Connector Tester
Mackey Oct 14,2026
Manually soldering FFC connectors with a fine pitch using a hot air gun can be tedious to test. This Arduino STM32 project was designed to test connectors with up to 40 pins. This board will test each pin for:- continuity of used pins- expected bridging between pins-&nb...
Testing STM32 Arduino
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Posture+ – Compact ESP32-S3 Wearable PCB Design for Posture Monitoring
kumari Oct 13,2026
Their ask was simple: tear it apart before it goes to layout. The board was a double-layer design — ESP32-S3, a 6-axis IMU, haptic driver, LiPo charging circuit, and a handful of passives. Their engineer had done solid work. But a wearable this small leaves no room for a respin. So we ran a full schematic review, signal-integrity pass, and power-distribution check before a single trace got routed.Here's how that engagement went.The briefThey wanted three things:- A component-by-component wiring ...
IOT Arduino ESP8266
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радиоуправление
Oct 10,2026
DIY Long Range RC Transmitter & Receiver using Arduino & NRF24L01 | 1KM Wireless Controller
9th Project Design Contest-Edge AI & IoT Arduino ESP8266
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NUVOLA32 — ESP32-S3 Open Hardware Development Platform
Oct 09,2026
NUVOLA32 is a powerful development board based on the **ESP32-S3**, designed for makers, hobbyists, and professional developers who want to rapidly prototype IoT devices, audio systems, gaming consoles, and display interfaces — all on a single compact board.It combines a high-performance wireless microcontroller with a rich set of on-board peripherals: TFT display, audio DAC, speaker, SD card, I2C buttons, CharliePlexed LEDs, LiPo battery management, and a 12-pin expansion header — ready to use ...
9th Project Design Contest-Edge AI & IoT Arduino ESP32
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ESP32 S3 Bad USB
T Oct 09,2026
# DescriptionESP32’s are nice microcontrollers, but not this one! This project describes how to build a WiFi rubber ducky or “bad USB”. No programming skills are required, just buy a ESP32 S2 board and flash it with the online tool.  Watch the YouTube video, it will guide you how to build it step by step:https://youtu.be/Hk9vcR5FV9kThe precompiled software bin files include some fun examples to get you started.The video will show you 2 build options:Use a standard ESP32 S2 board and fl...
Arduino ESP32 Microcontroller
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