Laser Light Security Alarm System Circuit Diagram. Laser security system circuit diagram and explanation in this laser security alarm circuit we have used lm358 dual comparator ic for comparing voltages coming from ldr. Talking about circuit diagram it is noticed that a tl072 op amp ic1 a is set up as a voltage comparator used in between the adjustable voltage driver p1 r4 and the light dependent voltage which comprises of photodiode d1 and r3 a fixed resistor.
2 working of the laser light security system using arduino. Two npn bc548 transistors implemented in this security alarm circuit as a switching device. Talking about circuit diagram it is noticed that a tl072 op amp ic1 a is set up as a voltage comparator used in between the adjustable voltage driver p1 r4 and the light dependent voltage which comprises of photodiode d1 and r3 a fixed resistor.
With this you can cover an entire house with an array of light beams.
The circuit is divided in to two sections first is a laser transmitter or laser light and second is a laser receiver with time delay and alarm or siren circuit. No security system is complete without lasers. By arranging aligning the laser beam with different mirrors a very efficient security system can be made. Talking about circuit diagram it is noticed that a tl072 op amp ic1 a is set up as a voltage comparator used in between the adjustable voltage driver p1 r4 and the light dependent voltage which comprises of photodiode d1 and r3 a fixed resistor.
