Ultrasonic fault tracking circuit
Source: InternetPublisher:狂妄火龙果 Keywords: Power DC/DC Updated: 2020/06/29
Low-intensity ultrasonic waves in the 30-45 kHz frequency band repel insects and small mice. This device is used to generate a square wave from 30 to 45 kHz. The LM555 IC is a wired ultrasonic oscillator and drives a high-fidelity tweeter-type piezoelectric speaker.
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