Hall effect signals...

[Seth Allen]

On Fri, 21 Feb 1997, eric schumacher wrote:
> 
> 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
> 
Thanks Eric, I never even though of the tach output.  Say, you don't have 
a brother named Michael, do you?  :)

Seth