diy projects
Nokia 3310 Pico Mod: Go Game Engine on an 84×48 Screen
A Pico-powered PCB and a Go game engine bring new games to the Nokia 3310's 84x48 screen. Here is how Hoani Bryson's Jam-winning build…
diy projects
ESP32 AI Calculator V2 Reads Your Handwritten Equations
This open source ESP32 calculator has a camera and two displays, so it can read a handwritten equation and solve it with cloud or…
diy projects
PhoneBot: Turn an Old Android Phone into a $400 Humanoid Robot
UCLA's PhoneBot uses a $50 Android phone as the brain of a 13-joint humanoid. See how it works and how to try the same…
diy projects
Build an ’80s Brick Phone with a Raspberry Pi Pico and Bluetooth
A Pico, a Bluetooth HFP module, and a keypad turn into a retro brick handset that answers your iPhone's calls. Here is how it…
diy projects
LED Bubble Hair Extensions with Motion-Reactive Rain Effects
Braid 2020 NeoPixel seed pixels into hair and let an RP2040 Feather and accelerometer turn a head shake into rain and lightning. A weekend…
diy projects
Retro Brick Bluetooth Handset Built with ESP32 and an HFP Module
A retro brick handset pairs with your phone over Bluetooth. See why the ESP32 audio sounded crunchy and how a dedicated HFP module fixed…
diy projects
Negotiator II: A Business-Card USB-C PD Bench Power Supply
Negotiator II turns any USB-C PD charger into an adjustable 5 V to 48 V bench supply on a 2 mm thick card. Here…
diy projects
Long-Range Bluetooth LE Mesh on an STM32WB07 Module
An STM32WB07 board with Coded PHY and a 20 dBm amplifier pushes Bluetooth LE to 4.6 km line of sight. Here is how to…
diy projects
ESP32-S3 AM Transmitter Revives Old Tube Radios
AM stations are going dark, but an ESP32-S3 can feed internet radio to old tube sets by shaping a carrier on one GPIO pin…
diy projects
SmallTV Hack Shows Any Data on a Cheap ESP Display
A GeekMagic SmallTV can show live data from your PC with no soldering and no new firmware. Just push a 240x240 image over HTTP…
diy projects
UNIHIKER K10 Package Measurer: ToF Sensor Plus Scale
A UNIHIKER K10, an 8x8 ToF matrix, and an HX711 scale team up to measure a parcel's weight and size, then pull up shipping…
diy projects
Two ESP32s Talk Over Light Using Just One LED Each
SecurePair lets two ESP32 boards pair and swap encryption keys over visible light, with one LED per board doing double duty as sender and…