Description
This image displays a TTP223B Capacitive Touch Sensor module, which is a low-power, single-channel touch detection IC designed to replace traditional mechanical buttons
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Function: The module detects touch or proximity through changes in capacitance, often with a human finger or conductive object.
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Operating Voltage: It operates on a wide DC voltage range of 2V to 5.5V.
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Default Behavior: By default (without modifications to the pads on the back), the output pin (SIG) is normally low. When a touch is sensed, the output goes high.
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Applications: It is commonly used in user interfaces, touch lamps, and various electronic projects, and can be mounted behind non-metallic surfaces like plastic or glass.
Pinout
The module has three main pins labeled on the board:
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VCC: Power supply input (connect to 2-5.5V).
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GND: Ground connection.
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SIG: Digital output signal pin.
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