Open Electronics

Build a scriptable USB keyboard using a Teensy board that emulates a standard keyboard and can be controlled over serial from a laptop or a Raspberry Pi, letting you interact with pre-boot menus and BIOS settings without a physical keyboard.

Discover the ePaper smart journal, an open-source electronic notebook built with a Raspberry Pi Zero 2 W, a Waveshare ePaper display, and an M5Stack CardKB keyboard. It offers the simplicity of paper with the power of a computer, perfect for capturing ideas without distractions.

A four-video series explores the analog-to-digital and digital-to-analog converters on the Arduino UNO R4, from basic concepts to building a practical electronic voice changer with just a few passive components and a dynamic microphone.

element14 Community has launched a new design challenge focused on smart home and healthcare projects, inviting engineers, makers, and tech enthusiasts to build innovative prototypes that improve everyday living and personal well-being.

PenEcho is an open-source digital canvas where you can write, draw, and annotate equations while receiving AI responses placed right next to your marks. This article explores its features, configurable AI backends, and licensing.

A new open-source project shows how to combine computer vision and robotics on a single board, using the Arduino UNO Q to detect and follow a human face in real time without cloud support.

Build a simple soil moisture threshold detector with a PCB fork sensor, an LM393 comparator, and a relay output for visual and local control.

Learn how to use the STEMMA QT/Qwiic connector on the Arduino UNO R4 WiFi to connect I²C sensors and displays, with a custom adapter board and example code.

The IOX-77 is an ESP32-C3-based development board that packs 75 GPIO pins into a compact 71 × 42 mm PCB, using five RISC-V CH32V003 microcontrollers on an I²C bus for parallel execution and expandability.

A compact LED traffic light module for Arduino and other platforms: how it works, how to wire it, and how to test it with simple sequences.

Build a compact digital clock using an Arduino Nano ESP32 and a MAX7219-driven 8x32 LED matrix, with WiFi time synchronization, BLE setup, and automatic brightness control.

The Blooper is an open-source USB looper that brings back the null modem concept for modern USB-C connections, enabling UART serial debugging, device emulation, and network-free file transfers between two hosts.

A hands-on test of a small lamp powered by the heat of a candle through thermoelectric generator (TEG) modules, measuring real performance, efficiency limits, and practical off-grid applications.

Build a compact smart greenhouse with an ESP32-C3 Super Mini, environmental sensors, and actuators, all integrated with ESPHome and Home Assistant for real-time monitoring and automation.

Cirkit Designer is an AI-powered platform for designing, simulating, and prototyping electronic circuits, supporting popular boards like Arduino, ESP32, and Raspberry Pi with a real-time simulator and a library of over 30,000 components.

Arduino UNO Q pairs a Qualcomm Linux processor with an STM32 real-time microcontroller on the classic UNO form factor, bringing AI and edge computing to the maker community.

Learn how to build a Bluetooth-controlled fire truck using the Arduino UNO R4 Minima board, an HC-05 module, and a water pump. This step-by-step guide covers components, assembly, programming, and testing.

An overview of Arduino's evolution from an open-source maker project to a complete family of single-board computers used in industrial and professional settings, with a look at the main board families and a dedicated white paper.

Espressif has announced the ESP32-E22, its first Wi-Fi 6E SoC designed as a radio co-processor for high-performance connected devices, featuring tri-band Wi-Fi 6E, Bluetooth dual-mode, and a dual-core RISC-V processor.

This article shows how to drive a large WS2812B LED ring with a Raspberry Pi Pico or Pico 2, creating festive light effects and even using the ring as a low-resolution display.