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> You can buy IR break beam alarms off the shelf, wouldn't that be a better option for a security system? > Like others have said... why not get something off the shelf... > These are rated at 100m or 328 feet which would be the round trip distance Again, what is being suggested is *not* a...

I'm not interested at all in coding the beam for security. This beam would be used (turned on and monitored) between the evening hours of, say, midnight to 5 or 6 am (so almost no ambient light). The intent is to detect a person or people walking down the far end of the court I live on as they...

> Are you looking for a handheld to defeat or circumvent an IR beam beam break sensor I have no idea where you get that from my initial post, but no, this is not about defeating a beam-break sensor. > or are you looking for a to aquire and set up a beam break motion dection system? I am...

I'm not into laser-pointers but I do want to make something that might involve using a laser pointer so I thought I'd ask here. I want to point what I guess should be a focused beam of light, probably IR, at a fixed reflector, which would bounce the light back to the transmitter where it would...