LED Ring

oshparkoshpark wrote 01/06/2018 at 05:13 • 2 min read • Like

@Jens Hauke designed this charlieplexed 20 LED blinker controlled by an ATTiny45 for the Hackaday Coin Cell Challenge:

156251514462780263LED Ring

This is a small blinky with 20 LEDs powered by one CR2032 coin cell and with an ATTiny45 brain. The firmware is written in plain C and compiled with the avr-gcc toolchain. The PCB is a two layer design made with KiCad.

Space efficient daisychained LED placing with shared anode/cathode soldering pads.


Firmware and gerbers are available on GitHub:


Here is a video of the LED in action:



Jens Hauke wrote 01/06/2018 at 13:44 point

The PCB is also shared on OSH Park:

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oshpark wrote 01/06/2018 at 17:02 point

thanks for sharing!

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