Open Electronics

SonicFly lets a drone follow another using only the sound of the leader's rotors—no GPS, cameras, or radio. Built by Yanbaihui Liu, it uses a four-microphone array, neural network, and Kalman filter to estimate position acoustically.

PyBLE is an open-source MicroPython IDE that communicates over Bluetooth LE, letting you code, run, and debug ESP32 boards wirelessly from a tablet or iPad—no cloud, no USB cable, no PC required.

Control a gate or other electronic devices from your smartphone using the Ganimede.E12 board and a dedicated mobile app, with a focus on privacy and security.

Gemma Translator is an open-source multilingual voice interpreter for Raspberry Pi 5 that runs entirely on-device, using Google Gemma 4 and LiteRT, with a retro-terminal UI and no cloud dependency.

A maker known as PRBS23 has freed the MasterBuilt Gravity 800 Grill controller from proprietary firmware, replacing it with an open source firmware featuring PID temperature control, over-the-air updates, and a real-time web interface.

Build a simple seven-note electronic keyboard using the versatile 555 timer IC. This project explains the astable multivibrator configuration and how to calculate resistor values for musical notes.

Build a no-code ePaper weather dashboard with the Seeed Studio XIAO EE05 and SenseCraft Seeedash. Drag-and-drop widgets, flash firmware, and display temperature, humidity, wind, and more on a 4.26-inch ePaper screen.

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.