diy projects
H8 Mini: Build a Palm-Sized 8085 Heathkit Replica
The H8 Mini is a through-hole, 80C85-powered replica of the 1977 Heathkit H8, small enough for your palm and simple enough to solder in…
arduino
CantaStorie: Offline AI Storytelling Toy on Arduino UNO Q
CantaStorie runs YOLOX-Nano and Gemma 1B on an Arduino UNO Q to spot an object and narrate a custom story, with zero cloud and…
diy projects
DIY STM32 Scientific Calculator With a Memory LCD and CR2032 Power
An STM32L431, a 400x240 Memory LCD and two CR2032 cells make a graphing RPN calculator. See the power, keypad and PCB tricks you can…
diy projects
200 A Boost Converter: Six-Phase 12 V to 48 V DIY Build
Nick Electronics built a six-phase 200 A boost converter that turns 12 V into 48 V, using aluminum-core PCBs, copper bus bars, and an…
diy projects
Walnut-Shell IR Remote Built on a XIAO ESP32-C3 and Wi-Fi
A real walnut now hides a Wi-Fi infrared remote on a XIAO ESP32-C3, with four IR LEDs, a MOSFET driver and a 6-day battery.…
diy projects
DIY Brain-Computer Interface: 8-Channel EEG on an ESP32
An ESP32, an ADS1299 ADC, and a custom 4-layer PCB make an 8-channel EEG headset under $350. Here is how to scale it down…
diy projects
ESP32 AI Voice Assistant With Animated OLED Eyes (Whisper + GPT)
An ESP32 records your voice, asks Whisper and GPT for an answer, and talks back while an OLED shows blinking eyes. Here's how the…
diy projects
CircuitPython POV Bike Wheel: Floating Images on 6 LED Strips
Six DotStar strips, a Feather RP2040, and a magnet sensor make a bike wheel draw images in mid-air. See how the timing trick works…
diy projects
AIR PRO: Pip-Boy Air Quality Monitor on Qualia S3 + SEN66
A wooden Pip-Boy box reads CO2, PM, VOC and NOx every 2 seconds and shows one word for air quality. See how the Qualia…
diy projects
EWatch: An Open Source ESP32-S3 Smartwatch You Can Program
EWatch packs an ESP32-S3, a 1.69-inch touchscreen, and a 350 mAh battery into a hackable wrist computer. See the parts, the power tricks, and…
diy projects
Build a Square PICO-8 Handheld with a Pi Zero 2 W
A Pi Zero 2 W, a 720 x 720 square IPS screen, and a custom PCB turn PICO-8 into a real pocket console. See…
arduino
Build an 8-Bit Arduino Laptop with FreeRTOS and 8 KB of RAM
An ATmega2560 with just 8 KB of RAM runs FreeRTOS, video at 24 fps, and a UI. See the parts, the memory tricks, and…