diy projects
BEAM Robot Pet: A Solar Walker With No Microcontroller
ALTco built a battery-free robot pet that roams toward light using 74HC240 chips and coupled oscillators, no code at all. See how it works…
diy projects
Weekend Build: ESP32 Game Boy Emulator on an ST7735 LCD
Engineeroids turned a spare ST7735 LCD and an ESP32 DevKit into a Game Boy emulator on perfboard. Here is the parts list and the…
diy projects
Recovery Kit 3: A Dual-Battery Raspberry Pi Cyberdeck
Jay Doscher's Recovery Kit 3 packs a Raspberry Pi 4, a 13.3-inch AMOLED screen, and two 99Wh batteries into a rugged case. No soldering…
diy projects
Sonicare Toothbrush NFC Chip Hacked With an ESP32-S3 and PN532
A Sonicare brush head hides a battery-free NFC chip. See how an ESP32-S3 and PN532 read its wear data and turn it into a…
diy projects
SAWbot: One-Motor Amphibious Robot Swims and Crawls on Land
SAWbot swims with a single motor and a traveling-wave membrane, hits 34 cm/s, then drives onto land on treads. Here is how a student…
diy projects
Analog Redial: ESP32-C6 Brings Rotary Phones Back to Life
An ESP32-C6, an audio codec, and a SLIC chip let old rotary phones call each other, run an answering machine, and even ring for…
diy projects
Digital Candle: ESP32-S3 and a 3,545-Parameter AI Flame
A tiny neural network on an ESP32-S3 paints a never-repeating flame across 144 amber LEDs. See how it works and how to try a…
diy projects
Jet Studio: Godot-Style Game Editor for ESP32 and STM32 Boards
Jet Studio turns Godot into a game editor for the Arduino Nano ESP32 and STM32F746, hitting 62 FPS on an ILI9341 SPI display. Here…
diy projects
DIY Handheld Spectrometer Uses a TCD1304 CCD and STM32
An STM32 board, a TCD1304 linear CCD and a 4-inch SPI display turn a diffraction grating into a battery-powered pocket spectrometer you can carry.
diy projects
Hidden Lockbox Opens Only to a Secret Magnet Gesture
No keyhole, no keypad: a Teensy 4.1 and an 8x8 Hall-sensor grid unlock this wooden box only when you trace the right magnetic gesture.
diy projects
Raspberry Pi Satellite Ground Station Built on an 8-Foot Dish
A salvaged 8-foot dish, a wheelchair motor, a Raspberry Pi and an RTL-SDR become a satellite ground station. See how the pointing and decoding…
diy projects
Sylphide OS Turns Cheap Microcontrollers Into Retro Desktop PCs
Sylphide OS gives ESP32-P4 and Pico 2 boards a windowed desktop with a mouse, built on FreeRTOS. Here's what runs today and what to…