Automated Attendant burglar alarm circuit


Posted on Mar 28, 2007

It shows an automatic unattended burglar alarm circuit, mainly for family night, warehouses and other occasions automatic unattended. The circuit consists of pyroelectric infrared sensor light control circuit


Automated Attendant burglar alarm circuit
Click here to download the full size of the above Circuit.

(RG, RP2, R4), the alarm driving circuit (IC2 and foreign components) , and the like. At higher light intensity during the day, low resistance state photoresistor RG, the transistor is turned on VTI, the alarm circuit shorted: In the night -RG resistance value becomes larger, VT1 off, ready to enter the stage alarm circuit alarm state, when someone enters the pyroelectric infrared sensor probe measured area, ICI foot is triggered, the buzzer alarm.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Filter Wiz PRO
lantern dimmer circuit
Audio Circuits 8
Low Cost Dimmable Led Ballast Using The Valley Fill Current Shaping Circuit
Circuit explanation for Ultrasonic Range Meter
ACU7505 chip MP3 player memory circuit
SR63 holiday lights ASIC
The basic structure of the DA conversion circuit multiplexer
DC-coupled multi-stage amplifier circuit a



Top