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  • Wow, it's surprising about the piezo - my understanding was that they didn't actually draw much power at a voltage... that they were more like capacitors where the change of voltage took power.

    Maybe something is shorted on your device? I guess there may also be a resonant frequency where the piezo actually makes a decent amount of noise.

    So just to be clear, you actually bought https://www.aliexpress.com/item/10050057­26070115.html and that's what is in the picture above? Looks like a total bargain.

  • So just to be clear, you actually bought https://www.aliexpress.com/item/10050057­26070115.html and that's what is in the picture above?

    Yes, exactly. Getting two with untracked shipping would be $9.75 total including VAT and shipping for me. I actually got three with tracked shipping so it was $5.6 a piece :-)

    Yes 32mA looks like short, maybe the battery cannot give much more than that, not sure what the wiring can be to work like that.

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