Features

Downloads/Development resources:
schematic, demo code, datasheets, etc.
Download: www.waveshare.com/wiki/RPi_Touch_Keypad
                    
                
                
                                    - Supports any revision of Raspberry Pi (directly-pluggable)
 - Provides your Pi with 16 touch keys
 - Features TONTEK TonTouch touch pad detector IC TTP229-LSF, supports up to 16 keys with adjustable sensitivity and built-in LDO
 - The system re-calibrates automatically when all keys are not detected touch more than about 4 seconds
 
- Interface : I2C
 - Keys : 16
 - Sampling rate : 8Hz
 - Human Body Mode : 6KV
 - Operating voltage : 2.4V-5.5V
 - Operating temperature : -40℃ to 85℃
 - Storage temperature : -50℃ to 125℃
 - Dimensions : 8.5CM × 5.6CM
 
- After power-on have about 0.5sec stable-time. During the time do not touch the key pad, and all functions are disabled
 
- VCC : Power supply (2.4V-5.5V)
 - GND : Ground
 - SDA : I2C SDA
 - SCL : I2C SCL
 

Downloads/Development resources:
schematic, demo code, datasheets, etc.
Download: www.waveshare.com/wiki/RPi_Touch_Keypad