Sjouke Burry said:
Ah!! you never heard about a moving magnet(the car)
over a coil??
A bit of amplifier and a Schmitt trigger plus a oneshot
for a dead time window ought to show interesting
things.
Things might improve,if 1 or two amps dc flowed in the
coil,that way the car needs no remanent field of its own.
Of course there are about @#$% other ways of doing it,
but dont underestimate rogers idea.
Hmm... The idea is not very new. Magnetic mines used the magnetic field (or
better disruption of the earthmagnetic field) caused by a ship. But a ship
is a very big thing compared to a car. Ships (iron ships) were often more or
less magnetic which could be decreased by degausing. Navy vessels still have
a degausing system installed. Most cars are lousy magnets. To induce
something measurable the car has to pass the coil with pretty high speed. I
guess you will not drive that fast in a driveway. (Which I suppose to be the
place it is meant to be used.) Pushing a DC-current through the coil will
not do any good. It's only wasting energy.
petrus bitbyter