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ArcticMyst Security by Avery

Modified laser

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Mar 31, 2012
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I want to design a laser that reads something on clothing (ie a color, hologram or something that can cover the entire garment) and when it points at that garment it sends a signal to activate an cervo. So when the laser is pointed at this this garment it activates the cervo. My thinking is that I can use preferbly an infrared pointer and wire it to a cervo.

Any thoughts??

or a good tutorial or starting point. Thanks
 





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repse7j3x.gif



Sorry... why?
 
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For the object to fluoresce it needs to contain phosphorus and its going g to have to be exited by a UV or near UV source like a 405nm diode as for the servo you might be able to use a photo diode as a switch
 
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repse7j3x.gif



Sorry... why?


So i have accepted a challenge to fly my model airplane through a course. I want to put either a piece of fabric or a colored board, I could tell the model plane to turn by activating one of the cervos when the color or fabric comes into view of this laser. My thinking is I could place these in key areas to ensure my model plane turns at the exact same time. And no this is not cheeting this was part of the challenge to audomate the airplanes course.

any ideas would help
 
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Lasers don't "see", rather they emit photons. You could use fluorescent paints on the boards, the plane could shine a weak 405nm beam to fluoresce them, but you would need sophisticated (read heavy) electronics and a color camera to determine the color and move the appropriate RC servo on the plane. All this stuff might be too heavy for an RC plane, unless you are allowed a big plane. Is this a school or university activity? Putting lasers on a plane is asking for terrorism charges in most jurisdictions. One nasty cop could give you a very bad legal headache. if it is an educational thing, and eye safety is covered, you might be OK. There might be better ways than using a laser ... What about a waypoint system with short range radio transmitters at each turn point, so the plane's computer knows which way to turn depending on the frequency of the transmitter. Computer starts the plane on its course and then looks for and heads to the first tx, then turns when the tx signal is strongest (when tx is under the plane). Two differnt frequencies would give left and right.
 
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AHHHH I did not even consder that, Thanks for the heads up. I think I will leave this challenge go. Thanks all for the replys
 
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Lasers don't "see", rather they emit photons. You could use fluorescent paints on the boards, the plane could shine a weak 405nm beam to fluoresce them, but you would need sophisticated (read heavy) electronics and a color camera to determine the color and move the appropriate RC servo on the plane. All this stuff might be too heavy for an RC plane, unless you are allowed a big plane. Is this a school or university activity? Putting lasers on a plane is asking for terrorism charges in most jurisdictions. One nasty cop could give you a very bad legal headache. if it is an educational thing, and eye safety is covered, you might be OK. There might be better ways than using a laser ... What about a waypoint system with short range radio transmitters at each turn point, so the plane's computer knows which way to turn depending on the frequency of the transmitter. Computer starts the plane on its course and then looks for and heads to the first tx, then turns when the tx signal is strongest (when tx is under the plane). Two differnt frequencies would give left and right.

Good to see you back Bill. :beer:
 




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