Comments on: Do It Yourself Laser Home Security

By: gaurang

gaurang — Sat, 18 Jul 2009 10:49:36 +0000

dear tai siach,
I like your project on laser base home security.

Would you please tell me, list of components requried for the
reciver circuit so whehnlaser beam get distract siren will get on.
or wher i will get this circuit.

gaurang

By: gaurang

gaurang — Sat, 18 Jul 2009 10:46:44 +0000

dear tal siach,
i like your project of laser home security. can you sujjest how can i make pcb cicrcuit so whenever this laser beam distract.
siren will get on.

would you please give list of spares to make this part of circuit

thanks
Gaurang.

By: ken

ken — Wed, 15 Apr 2009 10:29:01 +0000

Can the laser detector be customized to detect a foreign object in a pile of sheets (i.e. tissue paper)? Thank you very much..

By: JP

JP — Mon, 29 Dec 2008 03:35:49 +0000

I think this is a great project.
Question:
The Photocell should conduct when light hits it causing the base voltage to be reduced. But the schematic shows the source voltage going directly to the base rather than through the POT wiper and one output through the Photocell to grnd and the other output going to the base.

FYI for the person concerned with the siren voltage, most are designed to run on a voltage range from 6-14v (Radioshack 273-079).

To the guy who mentioned the 555 timer, it would be great, but after reading some of the posts, most should just try getting noise out of the siren.

By: The Magic Mirror Home Security System | Walyou

The Magic Mirror Home Security System | Walyou — Tue, 28 Oct 2008 14:24:50 +0000

[...] create a custom character for it. Otherwise, you can build a paintball security system, or even a laser home security system [...]

By: Home Security Surveillance Cameras Pocket Size | Walyou

Home Security Surveillance Cameras Pocket Size | Walyou — Mon, 20 Oct 2008 11:50:05 +0000

[...] you are looking to go a different route, you could always Build a Laser Home Security System or go for the Magic Mirror Home [...]

By: joe

joe — Mon, 06 Oct 2008 15:39:09 +0000

For the guy that said “buy a shot gun and know how to f*cking use it”, you would need to be home in order to use it on the burglar…some people really don’t think about there answers.
And burglars normally do run when there hear a sound in an empty house, especially if its a This circuit is flawed…

The siren, a 12V siren will not run on a 9V battery correctly, even with a transistor of that spec in place.
Burglaries take place mostly at night, the burglar would only cut the power if you lived in a wealthy area and a wealthy household, in that case there would have the tools to do this successfully and would have properly bin planned.

Don’t use this system as a proper alarm in many cases unless you live in a high crime rate area or live in an area not so wealthy, it is mainly for a bit of fun for the average person.
And for Â£20 its really not a bad buy.

By: Patrici

Patrici — Sat, 27 Sep 2008 09:08:44 +0000

can i know if this project is really feasible? coz we will do this as our investigatory project. thanks!

By: Matt

Matt — Thu, 18 Sep 2008 21:18:02 +0000

Food for thought here… any burglar that has broke in before probably knows the police response times in his area, usually 5 to 15 minutes, (I forgot where I got this statistic but it may be off…) in that time he/she(?) could have all the families valuables and be driving away in a family minivan. In the event of a break in you cant count on the police, the swat team, brinks home security, or the ice cream man. Simple advice, buy a f*cking shotgun and know how to use it.

By: alex

alex — Mon, 09 Jun 2008 23:13:09 +0000

hey guys … very, very cool project for the home… but how about camping in the rough and wanting to be warned of bears in the area . a portable unit set-up for batteries would be cool.. let me know know ,,,,,please . alexjr8888@hotmail.com