4 2011-07-08 SparkFun <p> <strong>Description:</strong> The MPR121 IC is a great way to build simple capacitive touch interfaces, and now it&#39;s even easier to incorporate into your Arduino projects with the touch shield. The touch shield has 9 capacitive touch pads, with headers for the remaining 3 electrode connections. With this shield you can have a total of 12 touch sensitive buttons. An on-board logic level converter allows it to work with 5V and 3.3V Arduino boards. Simply solder on some header pins and stack it on to your Arduino for a convenient input device. Check below for some example code to get you started.</p> <p> <strong>Documents:</strong></p> <ul> <li> <a href="http://dlnmh9ip6v2uc.cloudfront.net/datasheets/Dev/Arduino/Shields/Touch_Shield-v11.pdf" target="_blank">Schematic</a></li> <li> <a href="http://dlnmh9ip6v2uc.cloudfront.net/datasheets/Dev/Arduino/Shields/Touch_Shield-v11.zip" target="_blank">Eagle Files</a></li> <li> <a href="http://dlnmh9ip6v2uc.cloudfront.net/datasheets/Dev/Arduino/Shields/Touch_Shield_Example.zip" target="_blank">Example Code</a></li> </ul> Arduino Cap Sense Shield http://www.sparkfun.com/products/10508 Cap Sense Capacitive Touch Touch Shield ELE11

ELE10

ELE9

3.3V

5V

A0

A1

A2

A3

SDA_H

SCL_H

AREF

*IRQ

D3

D4

D5

D6

D7

D8

D9

D10

D11

D12

D13

GND

GND

GND

RESET

RX

TX

VIN