This module is based on NXP's MPR121 which is a proximity capacitive touch controller. MPR121 Touch sensor module can be easily interfaced with I2C interface and can be used to control up to twelve individual electrodes, as well as a simulated thirteenth electrode. The MPR121 also features eight LED driving pins. When these pins are not configured as electrodes, they may be used to drive LEDs.
There is no regulation on the board, so the voltage supplied should be between 2.5 and 3.6VDC. The VREG pin is connected through a 0.1uF capacitor to ground, which means, unless you modify the board, you can’t operate the MPR121 in low-supply voltage mode (1.71-2.75VDC).
There a four jumpers on the bottom of the board, all of which are set (closed) by default. An address jumper ties the ADD pin to ground, meaning the default I2C address of the chip will be 0x5A. If you need to change the address of the chip (by shorting ADD to a different pin), make sure you open the
Tenet Technetronics # 2514/U, 7th 'A' Main Road, Opp. to BBMP Swimming Pool, Hampinagar, Vijayanagar 2nd Stage. Bangalore Karnataka - 560104 IN
Tenet Technetronics focuses on “Simplifying Technology for Life” and has been striving to deliver the same from the day of its inception since 2007. Founded by young set of graduates with guidance from ardent professionals and academicians the company focuses on delivering high quality products to its customers at the right cost considering the support and lifelong engagement with customers. “We don’t believe in a sell and forget model “and concentrate and building relationships with customers that accelerates, enhances as well as provides excellence in their next exciting project.