Capacitive Touchpad Shield

Replaces mechanical buttons with capacitive touch pads that respond to a finger through plastic or glass, so a project can have a sealed front panel with no moving parts to wear out or let water in. The controller handles calibration and sensitivity in hardware and reports touch events over I2C, using only two pins regardless of how many electrodes you use. Sealed touch input with no mechanical wear; Works through a plastic or glass panel; I2C interface uses only two Arduino pins; Multiple independent touch electrodes