adafruit learning system Joy Featherwing Manual page 5

Pinouts
Power and Reset Pins
The power to the Joy Featherwing comes from the host Feather's 3.3V regulator, 3.3V and ground are both required
and are highlighted above
The Feather's Reset pin ends up coming from the left-most circled pin and connects to the on-board reset button. This
is great for resetting when you have the Wing on top
I2C Data Pins
All data and control is done over I2C so it works with any and all Feathers! SDA and SCL are highlighted above. There
are 10K pullups to 3.3V on each.
I2C Addressing
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