Hall effect signals...

[eric schumacher]

Hall sensors of the automotive type in general and the VW type in particular
are three terminal devices.  One terminal is ground, the other terminal is
Vcc ( about 6 VDC in the case of VW) and an open collector output. A CD4049
with suitable protection on its input will make an ideal interface since
unlike most CMOS devices it is permissible to raise an input above the chips
Vcc.  Note also that Bosch ignition controllers provide a tach output that
is a little more robust than the hall output.

Lotsa Luck Eric

At 03:02 AM 2/22/97 +0000, you wrote:
>Okay, I have decided to contine on with my dual fuelled turbo golf... I 
>am planning to use the stock distribuor mounted hall effect sensor for 
>signalling for the batch fire efi enrichment.  I am wondering if anyoone 
>has experience with the bosch hall effect distributor, I am wondering 
>what the output is ,and how easy it might be to tap in to it without 
>disrupting the signal to the ignition ecu. I can claim relative ignorance 
>here, my background is in mechanical engineering, not ee, andit has been 
>a while since my electronics classes.
>
>Any help would be appreciated,
>
>Seth Allen
>
>