基于A/D的电容触摸按键电路设计

A/D Circuit Based Design for Capacitive Touch Buttons

电容式感应按键以其无机械磨损、寿命长、防水防污、易清洁和时尚的特点,近几年应用领域和数量迅速增加.因此,结合电容感应按键的特点,设计了一种用A/D口搭配简单的电路实现电容感应按键的方法.经测试,电路的稳定性较高,在低成本的电路中适用性较强.

In recent years,capacitive touch button has been widely used and its applications have been increasing rapidly.The users can benefit from its characteristics such as minimal mechanical wearing,long duration,water-resistance,dirt-resistance,easy-to-clean and wide range of applications.This paper introduces the use of a MCU’S analogue to increase digital capability by driving a simple circuit to achieve capacitive touch control.The test result indicates that the proposed circuit features in high stability,strong applicability and low-cost to make.