This diagram uses the original Gemma but you can also use the Gemma M0 with the exact same wiring!

The battery will be wired through a tactile switch to power the circuit on and off.

Power, ground, and control signals are wired from the GEMMA to the first FLORA pixel, then to the second, to the 12 LED ring, and finally to the 16 LED ring.

The momentary capacitive switch is wired as a pull-up resistor switch to ground and to the D2 pin of the GEMMA to read "button" pushes, and cycle through color choices.

 

This guide was first published on Oct 22, 2014. It was last updated on Oct 22, 2014.
This page (Circuit Diagram) was last updated on Oct 24, 2020.