Touch surface specification: 1.4 * 1.4cm
Mode: inching, self-locking
Power supply voltage: 2.5-5.5v
Penetration distance: about 5mm (non-metallic)

This module is a capacitive touch switch module based on touch detection IC (ttp223b). The module outputs low level by default, and the mode is low power consumption mode; When you touch the corresponding position with your finger, the module will output high level, and touch again to restore low level. Switch mode to fast mode; When there is no touch for 12 seconds, the mode switches to low power consumption mode. The module can be installed on the surface of non-metallic materials such as plastic and glass. In addition, a thin piece of paper (non-metal) can be covered on the surface of the module. As long as the touch position is correct, it can be made into a button hidden in the wall, desktop and other places. This module can help you avoid the trouble of pressing the button.

(ttp223b chip parameters)

Please note during installation:after fixing the module, power on it again, so that he can remember the thickness of the diaphragm. After power on, it takes about 1s to stabilize. Do not touch the key during this period.