If you’ve ever had the impulse to learn how to design a PCB, then maybe this project will inspire you. Over on Instructables, taifur has a project called LumiDial, a 72 LED wristwatch based around a PCB tiafur designed himself. Here’ store from Instructables:
LumiDial is a custom-built wristwatch that blends classic analog style with modern LED technology. Instead of using physical hands, it uses 72 SMD LEDs arranged in a circular layout — 60 LEDs to indicate seconds and minutes, and 12 LEDs to mark the hours. At its heart lies an ATmega328 microcontroller, programmed to control the precise timing and LED animation that mimic the smooth motion of a traditional analog clock.
I designed the PCB myself, had it fabricated and assembled by JLCPCB, and then fitted it neatly inside a readymade stainless steel watch case. The result is a unique fusion of electronics, design, and craftsmanship — a wearable piece of engineering art that glows with precision and creativity.