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Old 07-28-2017, 04:16 AM   #1
SmallBikesRFun
 
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Which red light changer?

I want to get one of those magnet things that mounts to the bottom of the bike so the traffic lights will change when I pull up. Which one is best?
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Old 07-28-2017, 04:37 AM   #2
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Re: Which red light changer?

Revilla sells one but it's out of stock.

https://www.revzilla.com/product/ama...-light-changer

Personal opinion here but these things are kind of like "snake oil" to me. just something to sell you to put on your bike that doesn't work as advertised.

If you find one, let everyone know as I'm sure folks have been stuck at lights.
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Old 07-28-2017, 07:32 AM   #3
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Re: Which red light changer?

Don't bother getting one. Best thing is to ride up on the long line in the ground for the wire that is embedded. So if you see the whole loop and it is one, ride up and stay over either the left or the right side line of the loop, whichever is safer. If it is two loops side by side in your lane, go for the middle where there are two wires. Just stay over them. Getting over the shorter, side to side wire doesn't work well. The long edge significantly increases the chances you will be detected.

I've tested this method often on some intersections coming to work early in the morning and it does make a difference.

Also, in Texas, if you call in a light that isn't detecting you, they have to come out in a reasonable amount of time and fix it. I've head of people getting contacted to come out with their bikes to intersections they've reported so the tech can verify it detects their bike. Won't happen all the time, but I've heard multiple stories.
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Old 07-28-2017, 10:09 AM   #4
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Re: Which red light changer?

if it is a induction triggered light (coils in ground) a strong magnet could help but you need to get the magnet over the line marking where the coil is.

pulling up where you can put down your (steel) side stand on the line also will do the job.

there is a state law requiring the traffic light to be sensitive enough to be triggered by a motorcycle, if you find a light that won't cycle for you, report it!

many lights have been upgraded to machine vision, if you see cameras on the light poles pointed at the front of vehicles, that is the camera that lets the controller see vehicles at the light and triggers the cycle. a problem with the cameras is rising or setting sun can blind the cameras.

the newest system uses radar via small white square panels pointed at the lanes.
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Old 07-28-2017, 12:28 PM   #5
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Re: Which red light changer?

Magnetism makes no difference with wires in the ground. Mass and proximity of metals does. Semi truck and bus rims sit higher off the ground than most other vehicles and lots of lights will not respond to semis or busses. Built 4x4s with tall tires have similar problems. Road department guy where I live carries an aluminum bicycle rim, simply sets it on the wire and twists the adjuster until it works. Problem is, some detectors thus set activate when a vehicle passes in a nearby lane, and then your smart light develops a severe case of mental retardation. Repaving adds distance between the wire and vehicles, sometimes causing the lack of sensitivity. Road work supervisors are often relatives of politicians and can't seem to remember to readjust their dumb lights.
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Old 07-28-2017, 03:29 PM   #6
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Re: Which red light changer?

I've always wondered if placing a magnet in the heal of your motorcycle boot would work better. Computer hard drives have flat, rare-earth (strong) magnets in them to move the read-write head. I tear apart defective drives and harvest the magnets to use them around the garage for picking up screws etc. My thinking is these strong magnets would work better if they were closer to the ground. If they were in my boot and I dragged my foot a few yards as I was coming up to a stop, maybe it would work....?
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Old 07-28-2017, 04:09 PM   #7
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Re: Which red light changer?

Most signals are going to cameras and radar
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Old 07-28-2017, 05:15 PM   #8
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Re: Which red light changer?

Little known fact: the metal in Harley bells will help with inductive loops. You just need about a hundred of them.


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Old 07-30-2017, 03:37 AM   #9
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Re: Which red light changer?

OK thanks. I'll try some of the techniques mentioned instead of buying one.
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Old 07-30-2017, 01:42 PM   #10
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Re: Which red light changer?

Mine made a nice refrigerator magnet.
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Old 07-30-2017, 01:43 PM   #11
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Re: Which red light changer?

Quote:
Originally Posted by Jbay View Post
Most signals are going to cameras and radar
Yeah, I can't remember the last time I had trouble turning left on a bike.
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Old 07-31-2017, 05:43 AM   #12
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Re: Which red light changer?

I use the drive magnets as well. I have about four or five stuck to the bottom of my KLR. One on the drain plug, so that one is "functional".

Without them I can't trigger the gate to leave my property, so they do help.

Also, looking for the big square in the road were they buried the wire loop and waiting at one of the corners helps.

I have also heard that pressing the starter button works. It may, but I don't like that idea and never tried it.

Quote:
Originally Posted by Thurmont View Post
I've always wondered if placing a magnet in the heal of your motorcycle boot would work better. Computer hard drives have flat, rare-earth (strong) magnets in them to move the read-write head. I tear apart defective drives and harvest the magnets to use them around the garage for picking up screws etc. My thinking is these strong magnets would work better if they were closer to the ground. If they were in my boot and I dragged my foot a few yards as I was coming up to a stop, maybe it would work....?
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Old 07-31-2017, 10:17 AM   #13
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Re: Which red light changer?

I had thought the magnet in the left boot heel would work well too. One could put their foot down directly on the inductive loop. The magnet should influence the loop like a larger piece of metal.

Then I thought about the nails, staples and FOD that might be picked up and the steel and iron grates I might get stuck to.
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Old 08-01-2017, 09:40 AM   #14
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Re: Which red light changer?

Magnetism does not influence traffic sensor wires. Magnets are metal mass near the wire, and that is what makes the difference. Magnetism can really make mounting metal mass easy, though.

EDIT: Traffic engineers say magnetism doesn't work. Otherwise, aluminum wheels would not trip the sensors. The only people advocating magnets as a solution are people selling magnets, or suckers who bought them. Google the process, you'll see.
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Last edited by KenH; 08-01-2017 at 09:42 AM.
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Old 08-01-2017, 01:13 PM   #15
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Re: Which red light changer?

I thought Harley's worked because of the parts falling off each time you stop.
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Old 08-02-2017, 04:54 PM   #16
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Re: Which red light changer?

Oh! Harley joke thread!

EDIT: Drove I-77 through West Virginia and the real Virginia twice yesterday. An Ultra Classic Electra Glide would be perfect on that road. What a rush that would be.
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Last edited by KenH; 08-02-2017 at 04:57 PM.
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Old 08-02-2017, 08:02 PM   #17
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Re: Which red light changer?

That's West by God Virginia! As my mother used to say.

I never figured out exactly what that meant.
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Old 08-06-2017, 03:37 PM   #18
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Re: Which red light changer?

Quote:
Originally Posted by KenH View Post
Google the process, you'll see.
Link something please.

I can get behind the 'magnets don't help much' argument. It does help some because I can't trigger my gate without them on the KLR. However, I know exactly where the loop is and have had the luxury of experimenting with locations. I could not do such a controlled experiment at a red light and have always suspected the effect to be minimal.

After some google education (avoiding sales and MC sites, trying to stick to traffic/engineering sites) the word "ferromagnetic" comes up a lot; basically meaning a magnet needs to be able to stick to effect the loop. Aluminum wheels would not quality as ferromagnetic.
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Old 08-06-2017, 10:15 PM   #19
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Re: Which red light changer?

Quote:
Originally Posted by Voltar View Post
Link something please.

I can get behind the 'magnets don't help much' argument. It does help some because I can't trigger my gate without them on the KLR. However, I know exactly where the loop is and have had the luxury of experimenting with locations. I could not do such a controlled experiment at a red light and have always suspected the effect to be minimal.

After some google education (avoiding sales and MC sites, trying to stick to traffic/engineering sites) the word "ferromagnetic" comes up a lot; basically meaning a magnet needs to be able to stick to effect the loop. Aluminum wheels would not quality as ferromagnetic.
Well, I suppose Google is too difficult for some.

Here. is info on all manner of detectors. You'll note that inductive sensors respond to a twitch of their electrical fields, not magnetic fields. There are magnetic sensors, but generally not used in roads due to endurance problems and other bad habits.

All these sensors really are are metal detectors. Really. No rocket science.

Want to learn how a metal detector works? Look up "metal detector". There are several methods, magnetism is one, but others use less energy and are more dependable, so magnetism generally isn't used for stop lights and gates and such. Otherwise, nonmagnetic metals would not be detected. Induction allows the detection of conductive materials, not just magnetic. Apparently induction vs. magnetic is where the confusion comes from.

There is a forum on inductive sensing on the Texas Instruments website.
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Old 08-09-2017, 04:13 PM   #20
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Re: Which red light changer?

When you see the trace line of the sensor, either try to break 2 points on it (round) or center the mass of your bike over it (square). That's the only tricks I've ever found. I hate them things.
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