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Thread: The lighting in Tron Legacy.

  1. #31
    Confusion Master
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    I would be very careful about doing any heath robinson engineering anywhere near the wheels & braking system.

  2. #32
    Who am I? HiJackZX1's Avatar
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    Its not going to be that close to the braking system! So what route do you think I should take? The pancake slip ring assembly or magnetic induction? Both seem to have their pros and cons.
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  3. #33
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    If you are using induction, as said above somewhere, it could mess with any ABS systems you may have.

  4. #34
    Who am I? HiJackZX1's Avatar
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    Well it depends on the induction field and where it is placed. I do not have to use two circles. Also it does not have to come off the axle. It can come off an area of the car and point towards the tire.
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  5. #35
    MySQL Error soundman98's Avatar
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    Quote Originally Posted by HiJackZX1 View Post
    It can come off an area of the car and point towards the tire.
    which means that it would be a very strong signal---and considering that some electronic engine components can be located within a 17-20" of a wheel, and your sensor would need to transmit approximately that far all the time, that could result in some really nasty cross talk that disables the car.. well, wait, then how do tpms sensors work? they can't all be run off a battery...

    *search*

    Quote Originally Posted by wikipedia
    Direct sensors require power and may be either battery-powered or battery-less. In order to transfer data to the monitor or display, most direct systems utilize sensors having battery powered radio-frequency (RF) communication to transmit pressure readings and other data collected from the sensors. VisiTyre TPMS is a battery-less technology that employs maintenance free electromagnetic couplings to overcome the tire/chassis rotational boundary and eliminate "learn tool" reset and calibration procedures.
    ok, so time to learn how the EM coupling method works..

    hmmm...
    http://www.delta.com.tw/product/ap/tpms/tpms_main.asp


    ok, revision 2.. i guess i am so used to seeing coils used to transfer power for 60hz systems, that is the primary frequency that comes to mind when talking about this stuff..


    once you get into hundreds of khz, then i imagine the problem overcomes it's self...

    i wonder if those systems would be hackable enough to be made to work.... on second thought, probably not-- a tire pressure sensor should be much lower power draw then EL tape, so hacking wouldn't yeild very much..

    and honestly, that second link is exactly how i was imagining the system.. using a full coil in the tire would reduce issues with unbalanced assemblies, allowing you to epoxy the entire ring to the tire, and not have to deal with it ever coming apart..

    the power converter should be relatively easy to place-- just put it behind the centercap..



    now to see what kind of wireless power modules there are..


    ok, so this Ti chip says that it can 'create' up to 5w of power.

    here's a similar chip @mouser:
    http://www.mouser.com/ProductDetail/...a6h%252bxGqLXh

    and the reciever chip:
    http://www.mouser.com/ProductDetail/...MLIOYomgenA%3d


    ok, so according to the data sheets, the reciever chip is capable of 1.5A at 5v.

    from what i can understand, these need a a/c signal below 20v to transmit/recieve the power..

    but then there is the 'minor issue' of how close this stuff needs to be to effectively transfer power.. i did some research on wireless power for a usb screen years ago, and at that time, 1inch was considered quite a large gap.. i quit looking into it after my goal of 15ft appeared to not only be crazy, but also might make me glow from all the power in the air....

  6. #36
    Who am I? HiJackZX1's Avatar
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    Well my TMPS is battery. Now the induction I would build myself. The ones I have seen are week for purchase. The one I seen that people have built are heavy power. Now instead of having coils, I was thinking of pads. The pad would be very close to the rim via an arm. Then a coil would be around the rim, but not directly on the rim so the rim doesnt turn into a large coil, lol.
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