LASER SECURITY SYSTEM
INTRODUCTION:
Laser security system is becoming popular system in stores, building and they are also becoming popular with private homes as well.the reason for becoming popular is due to its simplicity and efficient security.Basically it uses the IC 555 timer which has ability to produce long time delays in array of applications,has draw many designers from op-amp, mechanical timers and many discrete circuit into every increasing noxious timer users.So using IC 555 for laser security system which is also called as theft alarming system is the better choice.Basically in this system laser is focused on the LRD mounted on board.However this is arrange there where the security is needed.Laser is focused on the LRD,so that if any theft try to gross the laser an if any blockage is recognize than alarm gets triggered.
COMPONENTS REQUIRED:
PCB LAYOUT:
This is how the layout looks when u have done with the designing.
WORKING:
INTRODUCTION:
Laser security system is becoming popular system in stores, building and they are also becoming popular with private homes as well.the reason for becoming popular is due to its simplicity and efficient security.Basically it uses the IC 555 timer which has ability to produce long time delays in array of applications,has draw many designers from op-amp, mechanical timers and many discrete circuit into every increasing noxious timer users.So using IC 555 for laser security system which is also called as theft alarming system is the better choice.Basically in this system laser is focused on the LRD mounted on board.However this is arrange there where the security is needed.Laser is focused on the LRD,so that if any theft try to gross the laser an if any blockage is recognize than alarm gets triggered.
COMPONENTS REQUIRED:
- 9V battery with snap.
- Connecting wires.
- LDR(Light dependent Resistor).
- Variable resistance 10K ohms.
- Resistance 220 ohms, 680 ohms.
- LED.
- IC 555.
- Switch.
- Capacitor of 100 micro farad.
- Laser.
- Buzzer.
PCB LAYOUT:
This is how the layout looks when u have done with the designing.
WORKING:
- This circuit uses IC 555,it basically connected as comparater with pin 6 with positive supply,whos output goes high then trigger pin 2 which is at supply lower than that of supply power,conversely the output goes low when it is 1/3.So the small change in voltage at pin 2 is sufficient to change the output of pin 3 from 1-0 or from 0-1.however output has 2 state ie. high and low which cannot remain in inbetween stage.It requires 9V of supply which can be provide with the battery itself,so it can be portable,hence the circuit is economical in power consumption.
- To encounter the presence of theft we have LDR and a Laser.
- LDR is an acronym for light dependent resistance.So as the name suggest it value is truly dependent on the intensity of light,which is focused on he LDR. So it has resistance of 1 mega ohms in dark and 2-4 k ohms in day.Hence it is able to respond to a wide light spectrum.
- Laser is focused on the LRD,so that if any theft try to gross the laser an if any blockage is recognize than alarm gets triggered.
What is the value of the buzzer, switch, LED?
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