Piezo Switch/Relay Question

Discussion in 'General Electronics Chat' started by tedb103689, Nov 16, 2005.

  1. tedb103689

    Thread Starter New Member

    Nov 16, 2005
    I am using the button in an automotive application (12 volts) to trigger a relay. I would like to use a Piezo touch switch with an LED indicator to trigger a transistor which will in turn power a relay. I have a circuit built to trigger the relay for ½ a second with a 20ms or greater pulse of the piezo switch. However the 2 volts across the piezo LED is presenting problems. Do you have a circuit with any of you piezo switches that might show how to setup this sort of circuit?
  2. mozikluv

    AAC Fanatic!

    Jan 22, 2004


    could you show us the circuit of your project so we may know in detail your problem?