diy-electronics

A hobbyist built a functional self-powered computer that is literally the size of a credit card and about 1mm thick, using an ESP32, NFC, e-ink display, and custom flex PCB.

The article details the development and viral success of 'Transit Tracker,' an open-source DIY project for creating custom public transit arrival boards using ESPHome and LED matrices.

An article detailing the hands-on assembly and testing of a TD4 4-bit CPU based on the book 'How to Build a CPU' and open-source PCB designs.