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
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
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
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
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…
arduino
XGO Duck: Build an Open-Source Robot Duck with Arduino UNO Q
Luwu Dynamics built XGO Duck, an open-source, 15-servo robot duck on Arduino UNO Q with a custom IMU-equipped PCB, ready to build before Microduck…
diy projects
Raspberry Pi Zero 2 W PICO-8 Handheld With a Square 720×720 Screen
A Pi Zero 2 W, an 18650 cell and a square 720x720 screen turn PICO-8 into a pocket console. Here's how UncleStem built it…
diy projects
Pocket Linux Messenger Built From a $20 MF800 4G Hotspot
A $20 MF800 hotspot, a thumb keyboard, and a Sharp Memory Display become a pocket Linux messenger with 4G. Here's the parts list and…
diy projects
Sudo-Pi Zer0: A Raspberry Pi Zero 2 W Handheld Linux Terminal
A maker built a pocketable Linux terminal around the Pi Zero 2 W, with a custom carrier PCB, keyboard, USB hub and battery. Schematics…
diy projects
This NFC Business Card Lights Its LEDs With Borrowed Phone Power
Kevin Tang's PCB business card lights up with no battery on board, pulling about 5 mA from the phone's own 13.56 MHz NFC field.
diy projects
ATtiny816 PCB Business Card Runs 21 LEDs on Harvested NFC Power
No battery, no charging port. This PCB business card harvests power from your phone's NFC field to run an ATtiny816 and light 21 Charlieplexed…