Step 4: Using the Laser

The laser I used was the cheap red ones for like 2 bucks. To make it more discreet I wrapped it with black tape. Wherever you choose to mount it, make sure it can be adjusted easily and that it can be left on. A good idea is to modify those metal flexy lights so you can attach the laser. I used a hose clamp to leave the on button pressed.
HI :) <br> <br>I've already checked the circuit 3x. but the buzzer wont sound. :\ <br> <br>but the photo resistor recognizes light and respond properly. its just the buzzer wont sound.?
sorry for the late reply....Hmmm what type of buzzer are you using? Try replacing the buzzer with and LED and see if it lights when triggered. Also in the schematic there is a squiggly line on the npn transistor from the emitter to collector that shouldn't there just in case you accidentally connected it.
<p>Hi sir please send me the circuit diagram </p><p>this is my email legaspimarajoy@gmail.com</p>
<p>Could you send me circuit diagram too?</p><p>And can you make a video, so we can see how it works</p>
This is sick set up! I've been trying to locate a company that does <a href="http://www.securedbytriton.com/products.html" rel="nofollow">alarm systems in Calgary</a>, but I may try this first. Thanks for sharing!
Thank you so much for sharing this information on a laser beam alarm system. I think this is a great idea! Do you know where I can get an <a href="http://www.securedbytriton.com/products.html" rel="nofollow">alarm system like this in calgary</a>? Or did you make this? Thank you for your help!
I have always wanted to have some laser <a href="http://www.securedbytriton.com/products.html" rel="nofollow">alarm systems in Calgary</a> at my house. I will definitely try this. Thanks for posting.
pls send me a right circuit diagram <br>my e-mail : ajay159lamba@gmail.com
i am use LF351 Op-Amp of IC1 Dual Op-Amp pls tell me its work properly

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Bio: I love music related things and anything high tech. Adventure is what I am all about.
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