Laser Security Grid

Ive been working on this for days, and cant get it to work, my whole concept was to create a laser alarm like in museums, by using a laser, a nightlight, and a buzzer. When you point the laser at the night light, it thinks its day and it turn off, when you break the beam it turns on, now what i was trying to do it take out the light bulb and using the two wires in there connect a buzzer to it, the problem is the night light is an AC using probably 120v, and the buzzer is a 12V dc. so it did not work, any ideas. please

i was thinking maybe connect a DC adapter to the night light

See this thread it has plenty circuits.

https://www.electro-tech-online.com/threads/laser-or-ir-beam-alarm-system.12763/

Gayan Soyza said:

See this thread it has plenty circuits.

https://www.electro-tech-online.com/threads/laser-or-ir-beam-alarm-system.12763/

Click to expand...

ohh cool nice

Umm, ive tried doing something like that just not too good with small parts, soldered everything up and it did not work, but a night light, i want to know if you can modefy a night light

Did you make a dark detector & focus the Laser on it? Where is the circuit?

This also will help you.

https://www.electro-tech-online.com/threads/led-night-light.37589/

I agree with Gayan. You're making this harder than it needs to be. Just use a dark detector. You can Google 'dark alarm', 'beam-break alarm', etc for many, many hits.

If you build it and it doesn't work, just ask for help. We'd be glad to help; that's what the forum is for.


Torben