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Amplifying piezo buzzer

Discussion in 'General Electronics Discussion' started by oscar123, Oct 15, 2017.

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  1. oscar123

    oscar123

    2
    0
    Oct 15, 2017
    hi, i am making a motion pir detector and i made it but it rings super quietly i was wondering if any of you know how to make it louder without a transistor because i do not have many of those i have:s9015,S9014,S9013,S9012,S8550,S8050,S9018,2N5551,2N5401,A1015,C1815,2N4403

    thanks for the help!
     
  2. Externet

    Externet

    733
    154
    Aug 24, 2009
  3. oscar123

    oscar123

    2
    0
    Oct 15, 2017
    I'm working with the first one
     
  4. Audioguru

    Audioguru

    2,791
    633
    Sep 24, 2016
    We do not know if the piezo buzzer has its + terminal at the positive supply and its - terminal is driven to ground with "something", or the opposite.
    If it is known then a transistor can be used to drive the piezo buzzer from a higher supply voltage.

    EDIT: Sometmes the sound hole in a piezo buzzer is sealed with tape so it can be cleaned. Remove the tape and it will be much louder.
     
  5. Externet

    Externet

    733
    154
    Aug 24, 2009
    Is it energized/powered with DC or AC in your circuit ? - What is the voltage when emits some sound ?
     
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