Touch Pad dùng TTP223 1 Key

1. An onboard TTP223 capacitive touch-touch sensor IC
2. on-board-level status indicator
3. Working voltage: 2.0V-5.5V
4. PCB board size: 29 (mm) x16 (mm)

After power-up time of about 0.5sec need stability, and this time period do not touch on the keys. In this case all functions are disabled
Always make a self-calibrationWhen the key is not to be touched, re-calibration period is approximately 4.0sec
1. Power supply + VCC pin
2 Output: OUT
3 Ground: GND