Bosch MAF to Hitachi MAF

[Darrell Norquay]

At 02:27 PM 8/28/96 CDT, Terry Mclane wrote:

>    Is there an easy way to invert the voltage signal from the Hitachi to 
>    the ECU?

A single opamp would do the trick.  Use a rail-to-rail output device
designed for single supply operation, and power it off the same 5V supply as
the MAF.  Set the opamp up in an inverting unity gain buffer configuration,
and the output signal will be the exact opposite of the input.  The IC Opamp
Cookbook by Walter Jung, pub by Howard W Sams & Co is a good reference.
Also, the National Semiconductor Linear Applications Handbook has the same
information.

>    Is there any way to also adjust the low/hi voltage signals, and 
>    interpolate between them?  If I could get the voltage of both units at 
>    a set of RPM (idle, max torque), it would be nice to get a smooth 
>    interpolation.

I'm not sure what you're up to here.  Do you want to run both units at the
same time, or what?


regards
dn
dnorquay at awinc.com