[James Eckert] got his hands on a Freescale MPR121 capacitive touch sensor. The chip in question speaks I2C and senses up to twelve simultaneous capacitive sense electrodes; break-out boards are ...

Capacitive sensing libraries for the Arduino ... buttons can easily be made into a smallish keyboard, and the radial touch sensor will emulate the ‘wheel’ interface on an iPod.

Microchip’s MTCH2120 turnkey touch controller offers 12 capacitive touch sensors configured via an I 2 C interface. Backed by Microchip’s unified ecosystem, it simplifies design and streamlines ...