Detailed Explanation of MCU Capacitive Touch Sensing Technology Principles 1

MCU capacitive touch sensing technology is a common PCM1802DBR touchscreen technology widely used in electronic products such as smartphones, tablets, and gaming devices. It detects and locates touch operations by sensing changes in the charge on the touched object. The following will provide a detailed explanation of the principles of MCU capacitive touch sensing technology.

The capacitive touch sensing technology of MCU mainly consists of two parts: the sensing circuit and the control circuit. The sensing circuit is responsible for detecting changes in charge on the touched object, while the control circuit converts the detected charge changes into specific touch operations. diode

The sensing circuit typically consists of a set of capacitive sensors, which are usually arranged along the edges of the touchscreen. Each capacitive sensor comprises a sensing electrode and a reference electrode, separated by an insulating layer. When the touchscreen is touched, the human body or other conductive objects introduce a certain amount of charge, causing a change in the capacitance between the sensing electrode and the reference electrode. This change in capacitance can be detected by measuring the voltage between the sensing electrode and the reference electrode.  diode