? on Mr Hall Effect

[Gary Derian]

Hall Effect devices sense the presence of metal, not the transients like a
magnetic pickup.  Something about electrons flowing in a flat conductor are
pushed to one side by a magnetic field creating a voltage across the
conductor.  This cross voltage is amplified to create an output.

Gary Derian <gderian at cybergate.net>



>In the past, I done some trouble shooting with Hall Effect Devises.
>Now, for the first time I hooked a meter to one with it sitting on the
>table.  The one I'm starring at is a Toyota, it has a red lead, a white
>lead, and a sheilded cable with ground.
>  So being the Cone Shaped Hat Wearer that I am, I did the following.
Using
>a 9v battery, I grounded it to the shell of the sensor
>applied + to the read lead, grounded the meter (DVM on V),
>hooked the meter's lead to the white wire, and then tested it.
>The test being held a gm crank disc near the tip of the toyota
>sensor.  The meter just flickers as I expose it to the metal?.
>I thought it would open and close as the metal came close to it?,
>yes/no?..
>  In various gm training references they show a pattern like
>
>       ___       ___       ___       ___
>___I      I___I     I___I      I___I      I
>
>Can someone splain this to me, or refer me to an online source for
>accurate info?.
>Thanks
>Bruce