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Ultrasonic Proximity Detector

Ultrasonic Proximity Detector

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COM

IC1

7812

1

3

OUT

2

IN

INVERTER

CIRCUIT

230V AC

INPUT

SOCKET

X1 = 230V AC PRIMARY TO 12V-0-12V

250mA SECONDARY TRANSFORMER

C1

1000μ

35V

D2

1N4007

D1

1N4007

X1

RL1 = 12V, 1C/ORELAY

N/O

N/C

D3

1N4007

230V AC OUTPUT SOCKET

Ultrasonic Proximity Detector

1
1
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publish time: 2020-09-29
Circuit Everyday

This ultrasonic proximity detector consists of an independent battery-powered transmitter and receiver. It is controlled at approximately 40 kHz using a pair of matched ultrasonic piezoelectric ceramic transducers. This circuit can be used in exhibitions to open pre-recorded audio/video, and when visitors are interested in products, the product information will be automatically displayed.

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