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Thread: Traffic Light Sensor Magnet

  1. #1
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    Traffic Light Sensor Magnet

    saw a bike for sale in USA with two littlew rectangular bits of metal stick to underside of centre stand. Owner told me that they were magnets and that they helped to activate the green light at some traffic lights, as most of the underroad sensors are geared to detect larger hunks of metal such as cars and that you could be a while waiting at them on a bike. He says they worked for him 75% of the time at lights that he had issues with before.

    Anyone tried this or feel the need to try this? I have at times been stuck at a red light and when I suspect this sort of thing I move forward so that any car behind me can trigger the sensor.
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    watching

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    They work really well. I can only recommend that you buy some and stick them on. Maybe buy three or four sets, tucking one pair in your underpants (where they will boost your already not inconsiderable super powers) and the rest glue to your tinfoil hat, shielding you from thought rays from the planet Zog.

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    Nah, better gluing a dozen or so to the tyre treads.

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    I just get the wife to drive in front in her car , never hit a red light yet
    As the great philosopher Keating once wrote " Life is a rollercoaster, you just gotta ride it!" ------Amen

    My current stable of "adventure bikes"
    2009 Guzzi V1200 Sport 8v Triple Black..my weekend sex kitten
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    My BMW history, all gone but not forgotten. K1 , R1100GS, R1150GS, G650 XChallenge, R1200GS TB

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    Nitrogen JJH

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    I've never had the problem, but I read somewhere that if you're stuck at a red light, you can put your side stand down in the middle of the sensor and it will trigger it.

    AFAIK, the underroad sensors work by induction, so the magnets should work.
    2005 R1150GS Adventure


  8. #8
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    It clearly didn't sense the man in flip flops you just knocked down

  9. #9
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    Quote Originally Posted by Wapping View Post
    They work really well. I can only recommend that you buy some and stick them on. Maybe buy three or four sets, tucking one pair in your underpants (where they will boost your already not inconsiderable super powers) and the rest glue to your tinfoil hat, shielding you from thought rays from the planet Zog.

  10. #10
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    The problem will be knowing if you have stopped in the correct zone, you may well find yourself out of reach with the stand magnets.

    I'd go for the screw fix option and you will be able to prod around a bit until you find the sweet spot, then a quick drawback on the telescopic action and you're good to go!
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    Or this, but the wiring may require specialist advice..........
    Last edited by J.R.; 16-09-16 at 08:33. Reason: Picture loading epic fail

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    Quote Originally Posted by J.R. View Post
    Or this, but the wiring may require specialist advice..........
    Here...
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    I'm more traditional when it comes to magnets. One of these fitted to the swingarm does it for me....
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    Ive been researching this now and may put some things together for a prototype,
    but 555 chips will be a big order from the fish and chip shop even on a friday.
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    Apprentice to the Chief Idiot Click here to find out how to Subscribe
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    Quote Originally Posted by Gossy View Post
    Ive been researching this now and may put some things together for a prototype,
    but 555 chips will be a big order from the fish and chip shop even on a friday.
    Keep it simple and buy 15 chips them put them into 3 groups of 5 next to each other.
    I dont think it matters if the chips are different sizes but they must have the same amount vinegar on each chip.

    Adrian

  16. #16
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    Click here to find out how to remove these ads

    Not sure why this straightforward question has brought out the wacky comedians, but a magnet should indeed help trigger sensors that have trouble seeing your bike - the magnet will influence the resonant frequency of the underground induction loop more strongly than non-magnetic material, and it is changes in this resonant frequency which are used to detect vehicles.

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