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Another Ultrasonic Proximity Detector Circuit
Another Ultrasonic Proximity Detector Circuit
Kiraaaa
Published on 2020-10-21
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We humans can only hear sounds up to 20kHz. Two special ultrasonic transducers should be used: one transducer emits 40kHz sound, the other transducer receives 40kHz sound and converts it into electrical changes of the same frequency.
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