- Gemma D0/A2 pin <--> Piezo (+)
- Gemma D1/A0 pin <--> NeoPixels
- Gemma D2/A1 pin <--> Photocell <--> 10k Resistor
- Gemma Vout <--> Resistor and NeoPixel (+)
- Gemma Gnd <--> Photocell, NeoPixel (-), Piezo (-)
Click to enlarge.
This diagram uses the original Gemma but you can also use the Gemma M0 with the exact same wiring!
This guide was first published on Aug 06, 2014. It was last updated on Aug 06, 2014.
This page (Circuit Diagram) was last updated on Jul 24, 2020.