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Here is an easy to make and powerful laser alarm system that can protect your entire home, indoors or out! My inspiration for this project came from Brad ...
1. 2 small project boxes 2. 1 1000uF 35v Capacitor 3. 1 5K Variable Resistor 4. Photocell 5. IC Board 6. 9v battery and clip 7. 1 N3904 ...
Build the circuit based on the diagram. I cut my IC board with a dremel to make it smaller so there was enough room in the box along ...
Install the circuit board and the 9v battery in the hobby box. Line up the photocell at the hole and hot glue everything in place. Also, attach the ...
Cut 3 holes in your second hobby box. One for the switch, one for the laser housing and one small one for the wires from the AC Adapter. ...
Turn on the laser and point it at the photocell box. You will have to adjust the resistor so the photocell is sensitive to the laser pointing at ...
Decide where you want your protection, across what doorways and then decide on where you want the laser to plug in and where you want the photocell box ...
Now when it gets dark and the laserbeam is broken, the LOUD 102dB siren will wail! Hope you enjoy this Instructable!
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