Re: p-lead signal conditioning or tach gen usage

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Subject:		Re: p-lead signal conditioning or tach gen usage
From:		Craig Winkelmann (capav8r@gmail.com)
Date:		Thu Nov 05 - 1:41 PM

Bob:

Here is the circuit that is the current interface between the tach gen and the
EFIS tach input.  It was originally designed to interface a Hall sensor with a
10 V p-p input.  The 50K resistor in parallel with the zener was to provide a
current path (so I am told) should a p-lead be used instead of the Hall sensor.

My thought was to put the circuit you have proposed in the location as shown in
the attached document (I could not scan to a .jpg and the .bmp was way too big).

Thanks,

Craig


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http://forums.matronics.com//files/tach_interface_146.doc