Acoustooptic Infrared Induction Burglar Alarm Switch Kit Infrared Induction Switch DIY Anti-Theft Alarm PCB Kit

This circuit design can make the buzzer sound and LED light up when the hand is close to the infrared transmitting tube and infrared receiving tube.

It stops the sound immediately after the hand is removed and the LED light is off with very high sensitivity.

When the hand is placed under the faucet, the water will flow out automatically and the water will close automatically after leaving.

This circuit has many life scenarios and is a circuit that circuit designers must master.

The manufacture of infrared induction circuit is mainly to learn the working principle and use method of infrared transmitting tube and infrared receiving tube, and master the practical application of universal operational amplifier LM358 as an operational comparator.

Applications:

Automatic door opening and closing

Automatic faucet etc.