Grove - I2C Touch Sensor
The I2C Touch Sensor is based on FreeScale MPR121, it feels the touch or proximity of human being fingers. This sensor include 2 parts: one Touch Sensor controller, and 4 finger feelers. Insert the connectors of feelers into base of Sensor controller, and you can begin your touch controlling. Specifications
Operating Voltage: 3 - 5.5V Standby Mode Current: 2μA Touch Pads: 12 Pads Communicating Protocol: I2C I2C Address: 0x5A - 0x5D Pin Description
The INT pin has to be led out by customers themselves if customers want to use the interrupt pin of MPR121. The CH4~CH11 are for customer expanding the function, there are 4 feelers within the pack. If you needs more, you can make the feelers by yourself or buy them in the www.simgin-chip.com The wires of feelers are twisted to reduce the impact of environment. The black(ground) wire can be cut off if high sensitivity is needed. Usage
NOTE: Because each electrode needs to be auto-configured by the MPR121 when power up and there is no power reset on the touch sensor controller, Every time you insert or extract a feeler you need to reset the power of www.simgin-chip.com. The feelers can also feel the human being fingers with something between, that's to say, you do not need to touch the feelers with your fingers indeed.
With a paperboard about 3 mm thick, the feeler can feel the touch of fingers, makes it a good solution for many applications.