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Ultrasonic Transducer Driver adjust frequency

Discussion in 'General Electronics Discussion' started by supak111, Sep 15, 2017.

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  1. supak111

    supak111 ★ƃuᴉɯǝɥɔs sʎɐʍlɐ★

    Apr 29, 2012
    Hey everyone, I'm messing around the some ultrasonic transducers, I have a few 40Khz, 28Khz..... But I only have a 40Khz 110v driver.

    Was wonder if anyone can tell me if this drive could be modified for different frequencies? It would be best if I could modify it so that I can adjust the frequency on a the fly. Any ides?

  2. Alec_t


    Jul 7, 2015
    If the inductor is part of the frequency-determining network then changing that would alter the frequency.
  3. kellys_eye


    Jun 25, 2010
    The output transformer is usually 'tuned' to the transducer (resonance) as the drive voltage is considerably higher than the supply voltage and, as a result, you can't use them at different frequencies.
  4. supak111

    supak111 ★ƃuᴉɯǝɥɔs sʎɐʍlɐ★

    Apr 29, 2012
    Oh ok thank you, figured I'd ask since I had no clue
  5. Audioguru


    Sep 24, 2016
    The datasheet of the ultrasonic transducer will show a graph of its very narrow range of frequencies. Maybe 38kHz to 42kHz.
  6. supak111

    supak111 ★ƃuᴉɯǝɥɔs sʎɐʍlɐ★

    Apr 29, 2012
    I have few transducers those aren't the issue, but I only have one driver. I know which frequency transducers I have, I just didn't want to buy more drivers if I can make this one adjustable
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