Reciver:

Transmitter:

This circuits consist of two parts, the first part will transmit a signal, and the second part will detect that signal and trigger a relay.To adjust the circuit, hold down S1 while pointing LED1 at the receiver. Adjust R6 until you hear the relay click. You can increase range by using a high output LED for LED1. Bright light will stop the receiver from responding to the transmitter.

You can use the designed PCBs to build the circuit simply:
 

Transmitter PCB Dimension = 25.5 x 16 mm
Receiver PCB Dimension = 50.5 x 31 mm

Title: Infrared Alarm
Source: unknown
Published on: 2005-08-27
Reads: 1266
Print version:

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