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APU 108

Discussion in 'General Electronics Discussion' started by Lene Larsen, Feb 1, 2018.

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  1. Lene Larsen

    Lene Larsen

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    Feb 1, 2018
    What can this APU 108 button like component with a short red and a short black wire?
     
  2. Harald Kapp

    Harald Kapp Moderator Moderator

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    Nov 17, 2011
    What are you referring to? More details, photo perhaps?
    A Google search for "APU 108" lists so many different hits...
     
    davenn likes this.
  3. Lene Larsen

    Lene Larsen

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    Feb 1, 2018
    davenn likes this.
  4. davenn

    davenn Moderator

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    Sep 5, 2009

    All OK :)
    It just really helps to get good info for people to help you :)

    Good, you found it was a buzzer .... try a low voltage , say around 5V ... red is positive, black is negative
    see if it buzzes well or only just starts to buzz ... if only just starts increase voltage to around 9V and see how it sounds

    Dave
     
  5. Lene Larsen

    Lene Larsen

    28
    4
    Feb 1, 2018
    Thank for response. Has been missing a buzzer for a long time, particularly because I am a teacher and in my classroom have some pupils with eye-handicap.
     
    davenn likes this.
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