Capacitive sensing libraries ... They created an Eagle library of touch widgets that includes everything from buttons, linear and radial sliders, touchpads, and a whole lot more.
It’s a capacitive touch controller that plugs into a USB ... got one it’d be an interesting choice to sacrifice it for a slider that’s only designed to do one thing. Liliputing's primary ...
It monitors the encoder for changes, controls eight RGB LEDs per knob, and even does capacitive touch sensing on the aluminum knob itself. The FPGA communicates via SPI with an Arduino master ...