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
Any circuit or webpage about this? Please help. Thanks
Last edited by a moderator: