How to make LASER LIGHT DOOR SECURITY ALARM at home

How to make LASER LIGHT DOOR SECURITY ALARM at home


What’s up everybody! And in this video I am going to show you how
to make laser security system for your home in just $10. We need some small craft mirrors, a buzzer
or a siren, a small switch, a laser pointer, two batteries and a LDR circuit board. Where, LDR stands for “Light dependent Resistance”. Which means, when there is light falling on
the sensor, the circuit gets cut off and where there is no light falling on the sensor, the
circuit gets completed. Now connect one end of the switch and the
buzzer to the battery and connect the other end to the wires provided for external circuit
in the LDR circuit board. Use the battery of appropriate voltage according
to your buzzer. Here I am using a piezo buzzer with a 12 volt
battery. As you can see, I have completed all the connections
and our circuit is now complete. When the switch is on and there is no light
falling on the sensor the buzzer will make sound. Now, let’s suppose this is a door, Place
the laser pointer at one corner and use the craft mirrors to change the direction of the
laser beam to cover the whole entrance up to the LDR sensor placed at the diagonally
opposite corner. Now if someone sneakily tries to walk in,
it will cut the path of the laser and the siren will start ringing. If you enjoyed the video, please hit that
like button. If you have any questions please leave them
in comments below. Also it will be very helpful if you can share
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videos or have a look at our channel’s page. As always thanks a lot for watching and I
will see you next time! Good bye!

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4 Replies to “How to make LASER LIGHT DOOR SECURITY ALARM at home”

  1. Liked the video? Please hit that LIKE button. Thanks for your support 😀 and Thank you in advance for SHARING this video! 😉

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