Detection Principle: Based on touch detection IC (TTP223B), digital capacitive touch sensor provides an integrated touch sensing area of 11 x 10.5mm and its sensing range is approximately 5mm. When you touch the sensor, the module's output state will also switch from the idle low level to the high level
Non-contact Trigger: You can install the capacitive touch sensor on the surface of non-metallic materials such as plastic and glass, and cover the surface of the module with a thin piece of paper (non-metal). As long as the touch position is correct, it can be made into a button hidden in the wall, desktop, etc
Wiring Method: Touch switch only needs to connect 3 pins, VCC connects to 2~5.5V power supply (3.3V or 5V is recommended); GND is grounded; SIG is the output signal, connected to the GPIO of the MCU/development board (such as Arduino D2, Raspberry Pi GPIO18)
Positioning Hole: 4 x M2 screw positioning holes with a hole diameter of 2.2mm, making the module easy to install and position, and realizing the combination between modules
Wide Application: TTP223B capacitive touch sensor is widely used and can be applied to smart homes, such as hidden wall switches, touch table lamps; electronic DIY, such as replacing mechanical buttons; can also be used for waterproof/dustproof panels; can also be used for consumer electronics, etc
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