MPR121 Capacitive Touch Sensor Module

Descritption : MPR121 Capacitive Touch Sensor Module - MPR121 has support for only I2C, which can be implemented with nearly any microcontroller. You can select one of 4 addresses with the ADDR pin, for a total of 48 capacitive touch pads on one I2C 2-wire bus. Using this chip is a lot easier than doing capacitive sensing with analog inputs: it handles all the filtering for you and can be configured for more/less sensitivity. This sensor comes as a tiny hard-to-solder chip so we put it onto a breakout board for you. Comes with a fully assembled board, and a stick of 0.1″ header so you can plug it into a breadboard. For contacts, we suggest using copper foil or parallax, then solder a wire that connects from the foil pad to the breakout. Add lots of touch sensors to your next microcontroller project with this easy-to-use 12-channel capacitive touch sensor breakout board, starring the MPR121. This chip can handle up to 12 individual touchpads. Specifications : Operating Voltage 2.5 to 3.6VDC Color Black Material Alloy+Plastic Interface I2C Length (mm) 30 Width (mm) 20 Height (mm) 2 Weight (gm) 10 Shipment Weight 0.010 kg Shipment Dimensions 5 5 1 cm Features and Specifications : 1.71 V to 3.6 V operation 12 electrodes I2C interface, with optional IRQ output to advise electrode status changes LED driver functionality with a maximum of 8 LEDs Uses I2C 7-bit address 0x5A (can be set to 0x5B, 0x5C or 0x5D)