InfaRed (IR) Motion Sensor

So...If I buy an IR Emitter LED and an IR Receiver LED ...and put them face to face...and get power to each of them....Can I somehow create a motion sensor out of that? For example, if someone walked between the 2 LEDs, it would trigger lights to go on. Is that possible?

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uguy10 years ago
Joe426 (author)  uguy10 years ago
FrenchCrawler10 years ago
Check out this PDF for a circuit:
Joe426 (author)  FrenchCrawler10 years ago
Wow, that circuit seems ridiculously over my head. :) O well, I'll have to come up with a better motion sensor i suppose. Thanks!
Search this site and you can usually find several other circuits (you could also spend hours there when you see other ideas that snag your interest :P ).
well there was a small platform supported on four rubber buds and the switch in centre underneath the platform.. (my kids call it a board...I call it a platform). weight of cat does the rest and opens his cat dish..but the mice our house was plagued by are too light to open it and let them eat or crap on our cats dinner
Joe426 (author)  maninamousesuit10 years ago
Cool, sounds like I'm definitely going to do that. Thanks.
glad you think so.... I made one using a stand on light switch from a lamp....It works fine..except for an ominous clunk as the switch is depressed
Joe426 (author)  maninamousesuit10 years ago
So....did you just make ... a large platform (which you can step on) which, when depressed, hits the switch that turned on the light? Right?
ok i im a low tech kinda guy..What about a pressure pad..Easy rig and hardly any electronics..What do ya think
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