Posted: 7/24/2011 9:58:06 AM EDT
| If i was looking for a laser tripwire, any suggestions where i would look? |
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radio shack has sold door entry chimes for decades. not a laser but still reflected light. inexpensive and might work.
ther are also "driveway alarms" that have a motion sensor, much like a motion detector light that set off a remote unit. it's thermal, not laser, but afofrdable and simple. usually have those in Lowe's or Home Depot IIRC. |
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thats what I was gonna say too, cheap and easy. J- |
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For the tinkerers out there, you can get IR laser diodes (emitters) and photodiodes (detectors) from the laser scanner assembly in a laser printer. Some of the diodes are sensitive to visible light, too, and work fine with a 635nm (red) laser diodes. Some don't. Be careful working with IR laser diodes. You won't be able to see the output and can easily irritate or burn your eyes if you aren't careful. This stuff can also be bought on eBay and various surplus and junk sites, too. |