Touch Sensor (4 Channel)

A 4-channel touch sensor module uses capacitive sensing technology to detect changes in capacitance when a finger comes in contact with or close to its touch pads. Each channel acts as an independent touch switch, allowing up to four touch inputs on a single board.
The module typically integrates a capacitive sensing IC, which manages signal detection, noise filtering, and touch response. It provides stable, high-sensitivity detection even through non-metallic surfaces such as plastic, glass, or acrylic.

Digital output pins trigger HIGH or LOW states based on touch activity, making the module easy to interface with microcontrollers and logic circuits without the need for mechanical buttons. This enhances reliability, eliminates wear and tear, and enables modern, sleek touch-based user interfaces ideal for embedded systems, consumer devices, automation panels, and IoT applications.