Traffic light sensors
Seems like every time I opt to stay in traffic lanes for a turn or a stoplight, instead of going to the corner and hitting the button for the crosswalk, I have to wait for a car to come and engage the traffic light sensor.
Most of them are magnetic, looking for a disturbance in their self-generated magnetic force, such as all the metal in a car or motorcycle. Bikes just aren't enough. SO, today I begin an experiment.
Where I work, we deal with out of warranty hard drives that are VERY dead. To prevent their accidental re-stocking, we dismantle them and keep the cool parts. Including some VERY powerful magnets! They are only magnetic on one side, I think their metal backing is lead impregnated or something LOL. Anyway I am going to tape or zip-tie one of these to the BB, facing downward. I'll probably just end up with lots of magnetic material sticking to it, and have to keep cleaning it LOL.
I'll report back as soon as I have results.