Infrared alarm barrier circuit

Posted on Feb 4, 2014

This infrared alarm barrier can be used to detect persons passing through doorways, corridors and small gates. The transmitter emits a beam of infrared light which is invisible to the human eye. The buzzer at the output of the receiver is activated when the light beam is interrupted by a person passing through it. Infrared Light Alarm Transmitter

Infrared alarm barrier circuit
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Circuit Schematic Infrared Alarm Barrier Receiver Circuit Schematic

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