Capacitance, Touch, and Proximity Sensing 12 Electrodes/Capacitance sensing inputs Capacitances Range: 10 pF to over 2000 pF Resolution: 0.01 pF I2C interface, with IRQ Interrupt output to advise electrode status changes The Seeedstudio Grove 12 Key Capacitive I2C Touch Sensor V2 is a multichannel proximity capacitive touch sensor. It's a 3-in-1 module with the following features: Capacitance Sensing, Touch Sensing, and Proximity Sensing. Based on Freescale MPR121, this sensor have 12 completely independent electrodes with build-in autoconfiguration. Features separate touch and release trip thresholds for each electrode, providing hysteresis and electrode independence and completely independent electrodes with built-in autoconfiguration. Thanks to I2C interface, you can detect all the 12 electrodes signals with only one Grove port, and the I2C address is hardware configurable, from 0X5B to 0X5D. This also makes it possible for multiple Grove - 12 Key Capacitive I2C Touch Sensor V2 (MPR121) to be used together for channel expansions in a single system, you can build a touch system which contains max. 36 electrodes.
