diy projects
This ESP32 CHIP-8 Computer Runs on a Flame and a Stirling Engine
No battery, no wall wart. A Stirling engine and a candle push enough current to run an ESP32 CHIP-8 machine with an OLED and…
diy projects
Wireless ESP32 Bike Brakes: ABS From Car Door Lock Actuators
A fat-bike brake with no cable at all: ESP32 nodes talking over ESP-NOW drive car door lock actuators, unlocking ABS and an adjustable bite…
arduino
An Arduino Nano ESP32 Robot Flips All 666 Pixels of This Display
Most flip-disc displays need one solenoid per pixel. This 666-tile panel uses a single Arduino Nano ESP32 gantry robot that prods each tile instead.
arduino
Never Buy the Same L298N Twice: An Arduino UNO Q Parts Tracker
A maker got tired of owning eight identical motor drivers, so he built an Arduino UNO Q inventory tracker that answers one question: do…
diy projects
A Parody Apple Laptop Reborn: The RP2350 Mactini Actually Works
A 20-year-old Apple parody became real hardware: an RP2350 running FreeRTOS, DMA-driven graphics and an alphabet you tap out on one capacitive pad.
diy projects
Build a Digital Nose: an SGP30 Sensor That Sniffs Out Spoiled Milk
Your nose gives a yes-or-no answer. An SGP30 gas sensor gives you a number you can plot, and the whole freshness checker is a…
diy projects
A XIAO ESP32-S3 Clock Hiding Inside a Fake Linksys WRT Router
Glen Akins rebuilt the mid-2000s Linksys WRT router as an NTP desk clock, swapping a Raspberry Pi Zero 2 W for a 21 mm…
diy projects
TinyML on a Raspberry Pi 3: LesionIQ Scans Skin Lesions Offline
A PhD student in Edinburgh fit a skin-lesion classifier onto a Raspberry Pi 3 with no internet at all. Here is how that constraint…
diy projects
How ExpressLRS Squeezes Kilometers Out of a 1-Watt ESP32 Link
Four open-source ELRS receivers, an SX1280 LoRa radio, and one 50-ohm trace: the RF design tricks that keep a 1-watt link locked kilometers out.
diy projects
DIY PLC on a PocketBeagle 2: Is a $1,000 Allen-Bradley Fair?
A $1,000 PLC versus a $10 dev board: element14's Clem Mayer built his own on a PocketBeagle 2 to find out exactly where the…
diy projects
How a DIY 1S FPV Quadcopter Reached 5 km and 34 Minutes Aloft
A 1S quad that flies 34 minutes and 5 km, and the copper battery tray that made it possible. The voltage-sag fix works on…
diy projects
Build Your Own Cyberdeck: A Raspberry Pi 5 Power Budget Guide
Raspberry Pi's cyberdeck guide breaks the build into brains, peripherals, power and case, with the 28W power maths most first decks get wrong.