a different MAF question

[Land Shark]

At 09:38 AM 2/1/96 -0800, you wrote:
>Has anyone on the list ever tried to splice a MAF sensor into an
>AFM (Air Flow Meter - Bosch's term for their air vane boxes) ?

 YES :)

 The AFM (airflow meter vs. HFM for Hot Film airmass Meter) has a logarithmic
 output of airflow vs voltage ... LN(F)=b+(Up/Uv)*a

 The HFM has a more complicated curve ...

 On a MOTRONIC (digital) you can just mung the internal  tables to work,
 but on an analog system, you'll have to use hardware to convert ..

 Either a uP system, or easier, an 10bit A/D feeding the address lines of
 an eprom, with the DATA lines of said eprom feeding a 10/bit D/A ..

 Reference BOTH A/D and D/A to the 5v ref out of the L-Jet ...

 Jim