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Piezo transducers

Discussion in 'General Electronics Discussion' started by pyrohaz, Dec 1, 2012.

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  1. pyrohaz


    Oct 28, 2012
    Hey guys,
    I'm essentially using piezo sensors to detect "a tap", quite like in electric drum kits. After testing, the piezo in parallel with a 330k resistor produces an acceptable "RC" and as an input to an arduino, can produce a surprisingly clean digital pulse to trigger arduino functions in this instance, the bouncing of the voltage isn't a big problem.

    The only thing is, I would like to know the output voltage of these piezo sensors with a 330k resistor in parallel. I would use my oscilloscope but I currently am not going to be at home for the next few weeks (education and what not!) and was wondering if anybody would mind taking a few snap shots of the waveform of them tapping a piezo transducer? OR anywhere that I can obtain this information, I want to know if it would be sufficient in summing 4 sensors together through a DL or gate (with one 330k resistor as the diode load) and using this to drive a RTL inverter (using a mosfet instead of a transistor!).

    Any help would be appreciated! :)
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