1Mhz Piezo Atomizer Circuit (555)

Discussion in 'The Projects Forum' started by Miyf27, Oct 4, 2016.

  1. Miyf27

    Thread Starter New Member

    Oct 4, 2016
    Need opinion on a circuit approach for a project. I need to drive a piezo disc at 1Mhz at ~80v & ~1 amp. Circuit powered by a 12v car battery via voltage regulator.

    Design approach I have thus far:

    - 1mhz square wave generated by high speed 555
    - signal in to MOSFET driver (I have a MAX4420 handy)
    - Output to Gate of MOSFET
    - Source of MOSFET to primary of step up transformer
    - Secondary of transformer connected to piezo

    Most of the design examples I've seen similar to this are for lower frequency, lower voltage applications. I'm a little concerned about heat and noise.
    Appreciate any comments. Cheers!
  2. jpanhalt

    AAC Fanatic!

    Jan 18, 2008
    What noise? Is there something in your design that will vibrate? 1 MHz sound is not audible. Do you have a part number for your mosfet yet? Will it be P- or N-type?