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General Chat Thread, You probably all know this but... in General; ... I just did this in a classroom and the teacher thought it was magic. If a piece of equipment ...
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    You probably all know this but...

    ... I just did this in a classroom and the teacher thought it was magic.

    If a piece of equipment isn't responding to the remote, point the remote into your camera lens and press a button. The camera sensor can see IR light.

  2. 2 Thanks to laserblazer:

    eejit (27th June 2011), korova_blue (27th June 2011)

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    Works great as a quick and dirty test of fibre connections as well.

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    AngryTechnician (27th June 2011)

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    CAM
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    Works on my phone's camera! Thanks!

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    It'll work on any digital camera - unlike us they're sensitive to infrared light, and show it as bright white on a display.

    Actually we're sensitive to infrared/ultraviolet too, but the lens of our eyes screens them out.

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    If you've any old digital cameras /webcams lying around that have been superseded, remove the IR filter and donate them + bottle of coke/opaque beverage to the physics dept as demo kit.

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    Very cool - did not know that.
    Thanks!

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    Quote Originally Posted by pete View Post
    If you've any old digital cameras /webcams lying around that have been superseded, remove the IR filter and donate them + bottle of coke/opaque beverage to the physics dept as demo kit.
    Go on you'll have to explain this.

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    Quote Originally Posted by Pyroman View Post
    Go on you'll have to explain this.
    You can see / take pictures through the coke using modified camera + infrared light from the sun. Works for lots of things that are opaque until you can "see" in infrared.

    Logitech webcams (older ones) used to be very easy to mod. Old Fuji still cameras (horrible grey ancient things) work, but more fiddly.

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    I think the camera will be able to see through the bottle of coke.

    Ben

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    Quote Originally Posted by plexer View Post
    I think the camera will be able to see through the bottle of coke.

    Ben
    Yes thats right but you need to be careful with that demo as if the camera CCD is able to detect and process NIR (near infra-redred light) then it can actually see through some cloths which can be a tad troublemaking in any environment let alone a school. You can also use this technique to see through spilled ink on paper which is quite cool.

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    Quote Originally Posted by SYNACK View Post
    Yes thats right but you need to be careful with that demo as if the camera CCD is able to detect and process NIR (near infra-redred light) then it can actually see through some cloths which can be a tad troublemaking in any environment let alone a school.
    Yeah, we assume the Physics Dept a) know how it works, b) are aware of the potential implications. As opposed to (say) the Art Dept who could also use it (IR Photography), but wouldn't necessarily be aware of the implications. YMMV.

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    Wait you have invented a camera that talks naked pictures of people wearing clothes!? We'll all be RICH, RICH I TELL YOU!

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    Quote Originally Posted by somabc View Post
    Wait you have invented a camera that talks naked pictures of people wearing clothes!? We'll all be RICH, RICH I TELL YOU!
    Lmao i was just thinking the same thing! Does that really work then through clothes? Scary!

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    Here is a good site explaining it with a few examples and the hack to make a low end one with a webcam.

    Make an Infra Red Camera - Naked Scientists Kitchen Science 2008

  17. Thanks to SYNACK from:

    Pyroman (27th June 2011)

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    Quote Originally Posted by Pyroman View Post
    Lmao i was just thinking the same thing! Does that really work then through clothes? Scary!
    yep it really works

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