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Brass buzzer in action

A project log for Beeping, Blinking Business-card Badge (B4)

Second generation of the NFC business card adding audible feedback

greggreg 06/30/2024 at 18:220 Comments

I got some brass piezo buzzers and assembled the third flex circuit.  Brass is much easier to solder to than stainless steel, but it t still took a little extra time on the disc.  Here is video of the card in action: 

The capacitance is a little higher and the impedance a bit lower than the stainless steel buzzer so I needed to up the bulk capacitor to get it to play reliably.

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