Presented here is a 6v Laser security system that can be easily programmed for any password. This project powered using a mobile charger which gives 6 volts and 500 mA. It can also powered using battery ranging 6 volts. In this two 5v relays are used. There is a simple password setup using SPDT (single pole double throw) switch. Wiring the password setup needs some knowledge about SPDTÂ switch.
6V laser security system circuit
Here I have wired in a such a way that the password is UP,DOWN,UP,DOWN. Here there are 16 possibilities. If you use centre positioned then there are 64 such possibilities. If the position of the switch is set correctly then the security can be disabled.
Firstly, setup the circuit leaving the LDR (light dependent resitor) out for the laser beam to be focused. power it up. Now the alam will be blown press the reset switch once. The alarm sound will be stopped. Once the beam of laser is crossed the alarm sound will start blowing and continuous until the push button (RESET) is pressed. You can use (circuit 2) in which the alarm is connected externally.
Caution
If you’re connecting external alarm don’t exceed current limit printed on relay.
Materials required:
• LDR (Light Dependent Resistor)
• 2 x 5 volt relays
• A momentary push button
• A buzzer (only for circuit no.1)
• 4 SPDT switch (you can use many switch to make you password complicated and unique)
• An old cell phone charger (But in working condition )
• 220 Ω resistor (220 ohms)
Feel interested? Check out other electronics projects.
Want more details in circuit
Dear Prakash, Is there any special requirements?
I need the circuit diagram
Dear sir,
mujhe ek simple electronic project bnana h to aap mre kuch help kijiye plzz sir fast reply kijiyega!!
Dear Pratik, there are many simple projects available on our website. You can have a look at our Electronics Projects section.
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sir muje proper circuit chahie
Dear Bharat, this is an untested prototype of the circuit. The author has not provided the circuit for this article.
sir can you plz provide me the rating of relay
Sir please give me a circuit diagram & full details in this project
Can’t we get a proper circuit diagram for the same?
Dear Pragya Rai, We are working on the same. You will hear from us soon.