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偶得一触摸按键电路,请大虾分析其原理(附图) (www.ouravr.com)

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Saved by 1 people (0 private), first by anonymouse user on 2009-04-28


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Highlighted by yorkjong

A点输出高频脉冲信号幅度为5v,当没触摸时,信号没旁路,所以输出5v左右,当触摸时信号被旁路,幅度降低。芯片普通的单片机

Highlighted by yorkjong

A点为脉冲信号且一直保持不变,频率为350KHz,占空比约2/3,幅值为5V。但B点波形在触摸时是有变化,可似乎很难准确用视波器量出来

Highlighted by yorkjong

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