Ultrasonic remote control detector circuit
Source: InternetPublisher:睡不醒的小壮 Keywords: Power supply other power circuits Updated: 2020/04/12
This circuit obtains ultrasonic audio signals through MIC1, then amplifies these signals and separates them in integrated circuit U2, a 74LS90 circuit. The output of U2 drives an audio amplifier while utilizing a piezoelectric element as a speaker.
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