HOW TO MAKE – A LEGO Laser Alarm

HOW TO MAKE – A LEGO Laser Alarm


Hi! Purple Oranji here. Today I’m going to play with lasers
and make a security alarm for my room In another video, I made an electronic door lock out of Mindstorms LEGO So if you haven’t seen
it you can check it out here, or here I think everyone occasionally wants to
keep a nosy sibling or parent out of their room Building on what I learned on that project I wanted to make something more complex So I wanted to make an
alarm that would trigger when someone tries to sneak in Today I’ll show you how I
made my own laser PEW PEW PEW security alarm out of LEGO Mindstorms For this project I’ll be using a Lego
Mindstorms EV3 brick Mirror tiles A red laser diode breadboards well a breadboard coin battery and its holder pin wires As always I’ll have deatiled links
in the description But first, a warning lasers can be really dangerous so
remember to be cautious and always use the right safety glasses so let’s begin Wow! Everything is so blue First I started with testing the laser diode I connected the diode to my breadboard I tested to make sure that everything worked I used a red 5 milli watt laser diode for this project because is relatively low cost and are safer than the other colors I used a breadboard so that we can quickly test and change things as needed I didn’t spend too much time on making this look nice because it was just a prototype for future versions I would like to make a better housing next it’s on to the laser platform because small vibrations could
cause the aim of the laser to be off I made a platform out of LEGO to hold the laser steady and also used for aiming I used lego Digital Designer to make and create the instructions that I needed to build it in real life with the laser base built All I have to do is add the
laser and test it out For the coding, I started off by making a simplest looping alarm once I had that, I added other enhancements like a countdown warning messages and an information display I created a custom block for the countdown so that I could easily reuse it in
different places if needed With everything loaded into the EV3 it’s time to test it out how the alarm works is by reading the light intensity of the laser with the color sensor the code will wait until there is a change in
intensity when the intensity changes the alarm will trigger I can press a button on the top to stop and re-arm the alarm
so it’s ready again Now that system works it’s time to install it somewhere fun I decided to install it in the doorway of my room anyone the breaks beam will trigger the alarm Well thats it My very own laser alarm system for my room this is only the first version there are many other things I can add to make it better but it was still fun figuring out how it all worked If you like this video, please give me a like
and subscribe to my channel PURPLE ORANJI also click the little bell
icon to get a reminder of my new videos Well, thats all for now see you next time Bye!!!

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