This TTP223 Capacitive Touch Sensor Module is an ultra-compact, low-power digital switch designed to replace traditional mechanical tactile buttons [Image 1, Image 3]. Operating within a 2V to 5.5V range, it features a simple 3-pin interface (VCC, GND, and I/O output) for seamless integration with microcontrollers like Arduino and Raspberry Pi [Image 1, Image 2]. The board features onboard configuration pads (“A” and “B”) that allow users to customize the output behavior between active-high/active-low or toggle/momentary modes, making it ideal for sleek smart home panels, interactive DIY projects, and hidden switch applications.