High-loudness piezoelectric alarm buzzer
Source: InternetPublisher:CGDyW5Z7 Keywords: Piezoelectric alarm buzzer Updated: 2025/11/18
This is yet another truly remarkable buzzer circuit. It slightly sweeps the drive frequency to produce a very annoying sound. It uses a transformer to amplify the drive voltage on the piezoelectric device to over 200 volts peak-to-peak. It emits a deafening 120 decibels when measured at 12 inches.
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