The TTP223B digital capacitive touch sensor is a compact electronic switch module that replaces traditional mechanical buttons. It detects changes in electrical capacitance when a human finger touches or nears the sensor pad.Core Specifications

• Voltage: 2.0V to 5.5V DC (Works with Arduino, ESP32, Raspberry Pi)
• Response Time: ~60ms in fast mode; ~220ms in low-power mode
• Sensing Depth: Triggers through glass, plastic, or wood up to 5mm thick
• Pins: VCC (Power), GND (Ground), SIG (Digital Signal Output)

Configurable ModesBy bridging or leaving open the solder pads A and B on the module, you can change its behavior:

• Momentary Active-High (Default): Outputs HIGH only while being touched.
• Momentary Active-Low: Outputs LOW only while being touched.
• Toggle / Latch Active-High: Touch once to stay HIGH; touch again to go LOW.
• Toggle / Latch Active-Low: Touch once to stay LOW; touch again to go HIGH.