The input given to Piezo Speaker is an analogue signal or Digital signal?

Discussion in 'The Projects Forum' started by Foong Lik Wei, Feb 16, 2015.

  1. Foong Lik Wei

    Thread Starter New Member

    Feb 16, 2015
    2
    0
    Hello, I want to ask the input given to this Piezo speaker is an analogue signal or digital signal? This is because I am using digital output pin of Arduino Uno board to connect this speaker, is that okay?

    Besides, if this speaker require an input analogue signal, then should I use Digital to Analogue Converter where convert the digital output pin of Arduino into analogue signal first and then feed to speaker?

    The diagram of the connection between Arduino and speaker is shown in this attachment.

    Thanks for helping. Circuit Diagram for Hardware.PNG
     
  2. Dodgydave

    Distinguished Member

    Jun 22, 2012
    4,998
    745
    Its digital, it will work ok with the circuit.
     
  3. Reloadron

    Active Member

    Jan 15, 2015
    963
    232
    All depends on the piezo you have. Some have a built in oscillator to drive the element and some don't. If you just have the element then you need a driver.You show a driver so it should work fine as drawn. hat are you feeding it from the Arduino?
    Ron
     
  4. MrChips

    Moderator

    Oct 2, 2009
    12,446
    3,362
    All digital signals are analog.:D
     
    RichardO likes this.
  5. Foong Lik Wei

    Thread Starter New Member

    Feb 16, 2015
    2
    0
    Dear Don,

    A digital signal from Arduino feed to LM386 (Power Audio Amplifier) first and then the LM386 connect to the speaker. Therefore, the output of speaker is depends on the digital signal from the Arduino board.

    Thanks

    Regards
    Foong
     
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