基于A/D的电容触摸按键电路设计

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.

A/D Circuit Based Design for Capacitive Touch Buttons

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.