Circuit Diagram

Click to enlarge.
This diagram uses the original Gemma but you can also use the Gemma M0 with the exact same wiring!
  • 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 (-)
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 15, 2019.