I'm sure I will say some of this wrong, please be patient as I am weak on electronics.
Ive noticed that a lot of generic ebike controllers have an ignition wire - set that needs to be plugged into itself if you don't want to add a conventional on/off switch. I assume it uses a 5V signal, and the circuit is energized at low amps to tell the controller to turn on.
My wife once had a treadmill that I assembled. It had a long wrist lanyard with a weak magnet which was placed onto a spot on the control panel to get it to work. If you fell when the treadmill was running, the magnet was easily pulled off and the treadmill would stop.
If a fully potted hall sensor had a piece of steel potted next to it, a simple ferrite refrigerator magnet could become an on/off switch, and if a real key was desired...a hinged panel could cover it which would be locked by a common file-cabinet lock. If the key is lost, such a panel - lock could be easily removed and replaced.
Such a device would not be a comprehensive anti theft deterrent, but bikes can be carried off by hand. I personally believe the theft tracking system should be sophisticated (GPS?), and any on/off switch should only deter a small child from activating the hand-throttle or PAS pedal.
I am after a level of water-proofing in that can operate underwater with absolute confidence...
Ive noticed that a lot of generic ebike controllers have an ignition wire - set that needs to be plugged into itself if you don't want to add a conventional on/off switch. I assume it uses a 5V signal, and the circuit is energized at low amps to tell the controller to turn on.
My wife once had a treadmill that I assembled. It had a long wrist lanyard with a weak magnet which was placed onto a spot on the control panel to get it to work. If you fell when the treadmill was running, the magnet was easily pulled off and the treadmill would stop.
If a fully potted hall sensor had a piece of steel potted next to it, a simple ferrite refrigerator magnet could become an on/off switch, and if a real key was desired...a hinged panel could cover it which would be locked by a common file-cabinet lock. If the key is lost, such a panel - lock could be easily removed and replaced.
Such a device would not be a comprehensive anti theft deterrent, but bikes can be carried off by hand. I personally believe the theft tracking system should be sophisticated (GPS?), and any on/off switch should only deter a small child from activating the hand-throttle or PAS pedal.
I am after a level of water-proofing in that can operate underwater with absolute confidence...