By Claire
#11966
Foreword:
As the ultimate anti-theft alarm device in sci-fi movies, laser alarm device has its invisible infrared ray available for experience and utilization, allowing you to catch the thief easily… Actually, it can be also used in this way.
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Your pet at home may be disobedient or go to a prohibited place. Why not making a laser anti-theft alarm emitter if you have no time to guard it?
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Today, I will introduce a simple laser alarm device model to you.

Principle: A laser emitter sends a light beam and another laser receiver receives the laser beam. When the connection is established, the alarm will be triggered if any object blocks the laser beam.

Component:
DFRduino UNO R3(similar as Arduino UNO R3
Gravity:Digital RED LED Light Module
Gravity: Digital Buzzer For Arduino
Laser Transmitter
Toggle Switches
9V battery
Jumper Wires

Making:
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Measure relevant dimensions of laser emitter and receiver with vernier caliper and record such dimensions for using during user modeling.
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Support of laser reception terminal
(10.89 KiB) Not downloaded yet
Base of laser reception terminal
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Finished installation of reception terminal
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Installation of receiver
(10.67 KiB) Not downloaded yet
Support of laser emission terminal
(9.15 KiB) Not downloaded yet
Support base of laser emission terminal
(11.4 KiB) Not downloaded yet
Support and support base
(10.04 KiB) Not downloaded yet
Switch installation
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Welding
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Insertion of support into the support base
(10.07 KiB) Not downloaded yet
Completion of emitter terminal
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Done!
If you think one is not enough, you may make multiple alarm devices!
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