The Digital capacitive touch sensor module is based on TTP223B . Normally , it output “LOW” and keeps at lower state. When touch is sensed on the circular marked region, it output “HIGH” and switch to the quick responce state .When not being touched for 12 seconds , it switches to low power state again , if the module is mounted in the surface of non metallic material such as glass ,plastic and acrylic etc, you can make the keys hidden in the walls and desks.The TTP223 is touch pad detector integrated circuit which offers one touch key . The TTP223 touch detecting ic is designed for replacing traditional direct button key . capacitive touch allows electronics to sense when your finger is within a few millimeters of a surface to stimulate button press just like how the push button works .Capacitive sensing may be used in any place where low to no human force sensing is desirable .
Digital Capacitive touch switch sensor module have 3 pins ( 2- power supply pins and 1- digital signal pin )
- SIG (Digital signal pin )
- Connect “VCC” of touch switch module to “VCC” of evive board
- Connect “GND” of touch switch module to “GND ” of evive board
- Connect “SIG” pin of touch switch module to digital pin number 8 of evive board