{"title":"Adafruit STEMMA Piezo Driver Amp - PAM8904","handle":"adafruit-stemma-piezo-driver-amp-pam8904","url":"/products/adafruit-stemma-piezo-driver-amp-pam8904","description":"The Adafruit STEMMA Piezo Driver Amp uses the PAM8904 switched-capacitor driver to amplify signals for piezo elements at up to 300 kHz. With bridge-tied load (BTL) output and up to 3× voltage multiplication, it can deliver approximately 13 Vpp — much louder than driving a piezo directly from a 3V microcontroller.\n\nThe STEMMA JST-PH connector makes wiring simple: provide 3–5V DC power and a square wave signal (20 Hz to 300 kHz), connect your piezo to the terminal block, and set the gain with the onboard dual DIP switch.\n\nKey Features\n\n\nPAM8904 Piezo Driver – Switched-cap BTL driver with built-in voltage boosting\n\nFrequency Range – 20 Hz to 300 kHz (suitable for audio and ultrasonic applications)\n\nSelectable Gain – Off, 1×, 2×, or 3× via dual DIP switch\n\nUp to ~13 Vpp Output – At 3× gain with differential BTL output\n\n3–5V DC Input – STEMMA JST-PH connector for plug-and-play wiring\n\nTerminal Block Output – Easy connection to piezo elements\n\n\nIdeal For\n\nLoud piezo buzzer and alert systems\nUltrasonic distance sensing\nAudio tone generation\nAny project needing high-voltage piezo drive\n\n\nPackage Contents\n\n1× STEMMA Piezo Driver Amp breakout (PAM8904)\n\n\n\nImportant: When powering from 5V DC, use 2× gain maximum (10V output). Only use 3× gain with 3.3V power (also ~10V output). The 15V output at 5V/3× exceeds the chip's rated voltage. Piezo element and JST-PH cable not included.\n","vendor":"Adafruit","product_type":"","in_stock":true,"options":[],"variants":[{"id":1409,"title":"Default Title","sku":"AF-5791","price":9.5,"compare_at_price":0.0,"on_sale":false,"in_stock":true,"available_quantity":100,"option1":"Default Title"}]}