testing 8×8 led matrix
the computing board with micro usb battery charger, dc-dc booster, arduino nano, audio module, and custom turn-off circuit.
connecting everything together
the finished product
the source code is 1690 lines and relies on the LedControl Library included in the arduino IDE and a button debouce library by franky.
the frame layout for the 8×8 led matrix smilies are copied from this adafruit project.
Source Code: tasterspil.c