This circuit is PIR detection circuit picks up the radiation from human.

Improved PIR sensitivity will provide signal to create the barking dog.

This circuit is suitable to the security systems.

 

    Technical data

     - Power supply : 4.5-6VDC.
     - Power consumption : 0.02mA. (standby), 325mA. (working, @ 8 Ohms 0.25W.)
     - Detection range : 4-5 meters.
     - Can be select the barking dog voice : flock of barking dogs and barking dog.
     - Volume control equipped.
     - PCB dimension (sensor board) : 1.21 x 1.01 inch.
     - PCB dimension (main board) : 1.58 x 2.21 inch.