$5 Dollar Burglar Alarm!

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I made a Burglar Alarm for under 5 bucks, and items I found laying around the house! No soldering required. (soldering optional)
<p>I can't get the video to play.</p>
Seems so simple! It will be very useful tip&nbsp; to &lt;a href=&quot;http://www.800amalarm.com&quot;&gt;alarm system install companies<span style=""> &lt;/a&gt;.<br /> </span> <table border="0" cellpadding="0" cellspacing="0" style="border-collapse: collapse;width: 200.0pt;" width="267"> <col style="width: 200.0pt;" width="267" /> <tr height="20" style="height: 15.0pt;"> <td class="xl65" height="20" style="height: 15.0pt;width: 200.0pt;" width="267">&nbsp;</td> </tr> </table> <table border="0" cellpadding="0" cellspacing="0" style="border-collapse: collapse;width: 200.0pt;" width="267"> <tr height="20" style="height: 15.0pt;"> <td height="20" style="height: 15.0pt;width: 200.0pt;" width="267"><span style=""><br /> </span></td> </tr> </table>
LOL I have done that before with a plastic cd case!
yarrrrrr how to download it?
damn great idea right to me wats ur group
that was very maguiver-like
Beautifully simple, and I love your prototyping technique with just cardboard, elastic bands and paperclips- I'll have to remember that one. If you are connecting free wires together you can solder without an iron- just twist the wires together, heat in a flame and add solder. Another possible source of louder buzzers is an old smoke alarm- watch out for radioactive sources when dismantling them but it would give the alarm a real bite! +
radio active? what the hell could be radio active in a fire alarm?
As Mr Slippy Fist says, in some smoke alarms there is a tiny radioactive source, which is used to detect smoke by sensing when the radiation crossing a small air gap decreases, caused by the presence of smoke particles.
Have you never changed a battery in one? Theirs a little black thingy with the radioactive sign on it.
oh, really? I've never noticed that before.
Thanks for your comments! Also thanks for the tip on how to solder with heat from a flame and solder :)
i really hate bringing this up, but if you don't mind waiting a couple weeks, you can use this as your buzzer:<br/><a rel="nofollow" href="http://www.dealextreme.com/details.dx/sku.826">http://www.dealextreme.com/details.dx/sku.826</a><br/>
i bought one of those from the dollar store and it can change from alarm to chime. It is unbelievably loud though, it says 90 Db on the package but it only gives out 90 Db the first time its used. It sucks up life from those tiny batteries very quickly.
Yeah but with that one you can't make a trip wire... anyway, this one is great for what I was looking for, I needed an alarm "trap" for my LARPing and this works brilliantly, simple enough to arm and disarm without any real skill!
Yeah...I own a couple of those alarms. I found out about that alarm AFTER I made this video. I could have saved a buck or two. You can always modify this burglar alarm with a louder buzzer (alarm). Anyway, thanks for watching my vid :)
nice i like it its very simple to make and it work great!
How about you make it a ten dollar alarm. Attach the string to a five dollar note and do the rest as usual. When someone takes the money the alarm goes of.
I mean off.
Can you please include actual instructions on how to make the alarm instead of just a video version?
When I uploaded this video to the <strong>VIDEO</strong> section it did <strong>NOT</strong> give me an option to post detailed instructions along with my video. <br/><br/>I read the Instructables Blog for Nov 30th, and here's what it said:<br/><br/>...&quot;We hope that Videos will support and help grow the site by making a specific section for how-to videos that <strong>don't quite need our step-by-step format</strong>.&quot;<br/><br/><a rel="nofollow" href="http://www.instructables.com/blog/">http://www.instructables.com/blog/</a><br/><br/>Anyway, thanks for watching my vid :)<br/><br/>Johnny Rock Stah<br/>
Yes, you are correct. Not everyone has figured out the differences yet.
They sell those little door alarms at most dollar stores ( They have them at dollarama which is a Canadian dollar store).
I like it, good job not soldering, I like that about this.
cool! (favorited)

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