All he had to do is send 5V down a USB cable. After whipping up shutter button housed in a tin of Eclipse gum and attaching a cable, [Luo] had a functional shutter. With the CHDK firmware ...
Board ATMEGA32u4 at 5V/16MHz (Great 3.3v/16MHZ) Micro USB to Xbox OG Controller Cable (Depending on the board) Regulator 3.3V (Optional) Level Shffter 5v/3.3v (Optional) Notes: For its correct ...