Recycling an IKEA light bulp

A project log for LED ring

A charlieplexed 20 LED blinker with ATTiny45. Space efficient daisychained LED placing with shared anode/cathode soldering pads.

Jens HaukeJens Hauke 05/27/2020 at 21:030 Comments

This 40 LED version recycled the PCB of a 600lm IKEA light bulb. Adding some additional wires, attach an ATTiny44 find a matching charlieplexing pattern and there it is. No need for KiCAD this time ;-).

BTW. There are 36 LEDs around. This are 3 LEDs per hour, if this would be a clock. Is that gonna be a clock? …