Application Note AN1058 How to make multiple resistive buttons for single channel CarPC JoyCon Exr/Exd/Exc The channel A,B,C,D of JoyCon Exr/Exd/Exc supports max 12 buttons for single channel. Each button at a channel need to have a unique resistor value not duplicated. This is the simple resistor ladder for 12 buttons, using 4 kind of