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Driving Piezo speaker (Buzzer)

sagacr2018

Can I drive a Piezo Speaker using Avnet Sphere Kit ? I tried to connect to PWM_0 of Kit and tried to convert Arduino Code to Avnet but failed. Arduino use internal timer to send Analog Signals but I am not able to figure out how to use Timer on Avnet Kit.

Have anyone done it ?

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  • The PWM example Brian mentioned should get you going.

     

    Before the hardware had PWM going a few months ago, I did a software based PWM for my piezo leveraging some Arduino code.  With the piezo buzzer I was using, I found that setting the period and duty parameters took trial and error to first get a tone and then to get what I considered a good tone.

     

    So, if it doesn't give you want you want, you may want to do a For...Loop that increments through the period values and outputs a number to the console.  Then listen for what you like.

     

    For example, for my piezo, to get a chirp , I had 400000 (period), 40000 (active).

     

    See ya',

    Sean

  • in reply to Sean_Miller

    Hey Sean,

     

    I got your point. I'll run a for loop for different combinations to see outcome. It'll need earbuds though image

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