make your very own laser burglar alarm

This is one of the common projects made using lasers .its cheap ,reliable ,safe and most important of them all handy to protect all your things.

Step 1 Materials

according to the image
1 photocell or LSR or LDR (as you call it) x1
2 5k variable resister x1
3 2n3904 transistor x1
4 1000uf 35v capacitor x3
5 speaker
6 9v battery x1
7 button cells x4
8  9v battery clip x1
9 most important of them all laser diode
10 vero board or circuit board

Comments

[prisms]

I just want to know that you have asked for 3 capacitors and had mentioned only one in schematic diagram.Do all the capacitors share same legs and if yes why didn't you used a single equivalent capacitor.

[amruth]

Did anyone try it and did it work

[sreeci]

did you see the LASER DIODE any where?
did you also see the Silver Oxide battery, for the Laser diode?

[ernie666]

I was thinkin abt making an instructable of the same thing, but mine has a latching circuit that latches the alarm so it will keep on ringing until it is reseted. Haha good job!

[coolkids]

good job dude happy to know that someone improved it