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555定时器是一种集数模等多功能为一体的中规模集成功能电路,其具有电路结构简单、使用灵活方便等优点,被广泛应用在脉冲产生、整形、定时和延迟等自动控制电路中。介绍了基于555定时器的数字触摸开关组成和工作原理,并进行了仿真设计。
The 555 timer is a medium-sized integrated functional circuit that integrates several functions such as digital-analogue and multi-functions. It has the advantages of simple circuit structure and flexible and convenient use. It is widely used in automatic control circuits such as pulse generation, shaping, timing and delay . The composition and working principle of digital touch switch based on 555 timer are introduced, and the simulation design is carried out.