This DIY E-Paper Weather Tracker Runs for 1.5 Years on a Single Charge

This open-source e-paper weather tracker uses an ESP32 chip and a 1,500mAh battery, lasting roughly 1.5 years per charge.
GitHub

esp-01

PCF8574 library. i2c digital expander for Arduino, Raspberry Pi Pico and rp2040 boards, esp32, SMT32 and ESP8266. Can read write digital values with only 2 wire. Very simple to use and encoder support ...
GitHub

Tulip Creative Computer and AMYboard - portable programmable devices for music, graphics, code and writing

Welcome to the Tulip Creative Computer (Tulip CC) and AMYboard! Tulip is a low power and affordable self-contained portable computer, with a touchscreen display and sound. It's fully programmable - ...
Hackaday

Logic Analyzers: Capabilities And Limitations

Last time, we’ve used a logic analyzer to investigate the ID_SD and ID_SC pins on a Raspberry Pi, which turned out to be regular I2C, and then we hacked hotplug into the Raspberry Pi camera code with ...