Noob working a 24VDC siren PA on 12VDC with PTT mic interrupt

Discussion in 'The Projects Forum' started by mat68046, Dec 30, 2015.

  1. mat68046

    Thread Starter New Member

    Dec 30, 2015
    Working on converting a 24vdc PA siren to work on 12VDC. I found a step-up transformer to power the unit. The tone module and integrated amp runs on 24 volts but I also want to run a mic PTT to switch in as signal and power and isolate the tone module/ power supply line. I assume the mic PTT can handle 24v....Being challenged electronically I stop at theory and get lost at 87A relays.
    I can solder at least to breadboard something!
    Appreciate the help