The circuit will be focused on detecting object (refer to intruder) moving through it using one infrared transmitter and one infrared receiver. When the infrared signal is being blocked (when intruder walk-by) or the receiver does not received infrared signal, the relay will be turned on and thus triggering the buzzer and LED light.

Any circuit or webpage about this? Please help. Thanks

 

Where is the ransome note font when you really need it?

GIVE ME THE SCHEMATIC I WANT AND NO ONE GETS HURT.

The quality of the posts are going way down. Did the OP type any of this or just find the words he wanted to copy and paste?

 

Hello,

You already have a thread for this:
Help ! Infrared Intruder Sensor !

Bertus