- Download our code here and transfer it to the microcontroller using an AVR programmer.
- Download the data sheets, which contain connection instructions for the ScreenKey (screenkeys.com) and the microcontroller (atmel.com).
- Wire the data, clock and switch pins for the ScreenKey to the microcontroller and its power pins to the DC-to-DC step-up. Add resistors, which ensure that the signal levels to the ScreenKey's pins are stable.
- Insert an AA battery, and slide the whole assembly into your preferred container. Move the jumper switch on the battery compartment to turn on your GameKey. Spend the rest of your day staring into the button screen.