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Adafruit STEMMA Piezo Driver Amp - PAM8904

Adafruit STEMMA Piezo Driver Amp - PAM8904

Pimoroni

£4

Price read from Pimoroni on 2026-10-22. Check before buying.

Piezos make noise when you put an AC voltage across them: and the bigger the Vpp the louder they are. With your standard 3V logic microcontroller you can make 3Vpp with a PWM out, or 6Vpp differential with two complimentary outputs. But what if you want even louder? Or if you're using a piezo to sense distance using ultrasonic bounces? The nifty PAM8904 is an amplifier specifically designed for driving piezo elements - and unlike audio amplifiers it's good for up to 300 KHz! It's a switched-cap piezo driver that has bridge-tied load (BTL) output and up to 3x voltage multiplication thanks to a

Pimoroni's own words, read from their page.

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The part other shops don't tell you. Three separate questions, kept separate on purpose, each with its source.