Infrared Alarm by LM567 LM308

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Receiver

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.

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Infrared Transmitter by IC LM324
Gate Alarm by IC 4011

Read More Source:
http://www.newcircuits.com/circuit.php?id=sec002
Thank you.

This entry was posted on Monday, November 19th, 2007 at 11:53 pm and is filed under Digital, Electronic Control, RF-Radio Frequency. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.