CMOS 4013 Switch| Circuit Project

The voltage generated by a piezo transducer can activate a digital circuit. One may build a simple demonstration switch from a piezo transducer and a 4013 D type flip flop (see Figure 12). Each time the piezo film is hit, it triggers the 4013 turning the LED on and off on alternate triggers. While this circuit works , it is unreliable, due to the waveform of the generated piezo pulse signal. To a digital circuit, a piezo-electric pulse will resemble a switch bounce with decay (see Figure 2).

Circuit diagrams and schematics - Electronic projects

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CMOS 4013 Switch