DSS Laser Security System Circuit Diagram on PCB for for Science School Projects  (Yellow)

You can use this circuit for theft alarm also, You can use this anti theft alarm circuit to thwart burglary. It sounds an alarm when someone come to enter into your home or office by front of LDR, Build in Dot Dot Type layout PCB for School Projects Buzzer Alarm on in darkness, Easy to Use and durable circuit, 100% OK Tested Working, Made in India Project Full Customer support provide, Auto sensing led light using ldr sensor 100% impressive and fast working An LDR is a component that has a (variable) resistance that changes with the light intensity that falls upon it. This allows them to be used in light sensing circuits. Now Security is main concern for various buildings, houses and offices. For this purpose, there are a variety of security alarms available in market which uses various types of technology for intruder detection like infrared sensors, motion sensors, ultrasonic sensors, laser sensors, etc. this is laser alarm security sensor,