Burglar alarm circuit


Posted on Mar 28, 2007

A simple burglar alarm circuits, sensors pyroelectric sensor IRA-E100SZI. When human movement is detected, the pressure on the electric buzzer alarm whistle. Sensor receives si


Burglar alarm circuit
Click here to download the full size of the above Circuit.

gnals via AC amplifier, and then by the rectifier circuit into a DC drive transistor VT1, VT2 when turned on. Piezoelectric buzzer alarm. Several nearby Hertz gain amplifier circuit requires about 70dB, single-stage amplifier is not enough, it can be multi-stage amplifier to ensure the necessary gain. When the input signal is generated by the body movement is very weak, the general use of the optical zoom system.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

28 LED Clock Timer
sine to square triangle wave
Lights Control for Model Cars
Numitron Clock with Battery Back-up
Smoke Detector circuit diagram using SD2 IC
Arduino UNO Tutorial Rotary Encoder
Linear RF Power Meter
Antenna Combiner
8051 ps2 lab kit article
12dB-oct by the OP amplifiers low-pass filter



Top