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?
Most signals are going to cameras and radar
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....?
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.
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.