Touch sensors are devices that detect physical contact, allowing users to interact with electronic systems. They work by sensing changes in capacitance, resistance, or pressure when a finger or object touches their surface. Commonly found in smartphones, tablets, and touchscreens, these sensors enable intuitive control without the need for buttons. There are various types of touch sensors, including capacitive, resistive, and infrared sensors. Capacitive sensors are widely used in modern devices due to their sensitivity and ability to detect multiple touches simultaneously. In contrast, resistive sensors require pressure to register a touch, making them suitable for different applications, such as industrial equipment.