Laser Security system
Abstract L.A.S.E.R. light security is a type of security system, that is the system used in many restricted areas like Bank lockers, Defense areas, Museums, etc…... The LASER security system is a simplest method of security system and it is very safe too. Component list 1. LDR 2. TRANSISTOR BC 548 (2 nos) 3. RESISTOR 100 Ω (3 nos) 4. BUZZER 5. LED 6. 5V POWER SUPPLY 7. SWITCH 8. L A S E R TORCH Circuit Diagram: Circuit of L A S E R: Working: The working is based on a simple fact behind on the L.D.R .That is at the time of L.A.S.E.R beam hit on the L.D.R, the resistance of L.D.R is low. So the current have a tendency to move through low resistance loop. Hence the conduction of current at that time is through the L.D.R. And the circuit is complete without flowing through the two transistors. Otherwise, when the L.A.S.E.R beam is cut or distorted,...