This diagram uses the Gemma v2 but you can also use the Gemma M0 with the exact same wiring!
Gemma + 8x8 LED Matrix
Using the GEMMA in this build allows us to plug in a rechargeable battery directly into the JST port is directly on the board. GEMMA can be powered by USB but will need to have a battery power source for portability.
VCC pin goes to VBAT
GND pin goes to GND
SCL pin goes to D2/A1
SDA pin goes to D0
This guide was first published on Feb 20, 2014. It was last
updated on Feb 20, 2014.
This page (Circuit Diagram) was last updated on Jul 24, 2018.
If your new to working with GEMMA
, be sure to use a breadboard and jumper wires to prototype. Use alligator clips to clip jumper wires to GEMMA
. The 8x8 LED matrix w/backpack will need header + pins soldered to the breakouts. Check out the adafruits guide to LED backpacks
for more details.