warning lamp with Euro lights

[Orin Eman]

> However, you MAY be able to get the hall sender to just sense the
> presence of the magnetic field, though my experience says that they are
> better at sensing changing magnetic fields (think bicycle speedometers
> and electronic tachs). If it can just sense a weak magnetic field, then a

Hall sensors are totally static - the magnetic field need not be
changing or moving.  However, I doubt that a cable carrying current
would generate enough of a magnetic field to trigger one.

Bicycle speedometers usually use a reed switch to detect the magnet
attached to the spokes - with the exception of the Avocet ring
which actually has 20 magnets which induce an AC current in a
coil sensor when the wheel is rotating.

> hall sensor may be able to be used to fool autocheck if you use the hall
> sensor to fire another auxiliary circuit through a resistor that would
> feed directly into the autocheck circuit through the original bulb
> wiring. Not sure if it's worth all of the trouble.

It wouldn't be...

Orin.