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Very bad soldering i thought
The two yellow track are i think touching themselves at red point :
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I'll check those soldering points.
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Originally Posted by robinsonb5
I think your problem is just that you're using the wrong kind of buzzer. You have one with active buzzer circuitry, designed to emit a tone when power is applied - you need the simpler type, which just acts as a speaker, leaving the transistor to generate the actual buzz.
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Can you point me to a buzzer that'll work? I've checked ebay, but all the buzzers looks the same to me. If you can povide me a link to the ebay item I'll be more than happy, since I'm located in Uruguay and ebay is the best option to buy these kind of items for me. Thanks.