Solved ignition noise problem...thanks all!
Sandy
sganz at wgn.net
Fri May 15 00:45:11 GMT 1998
Great, the LM2935 is slated for death, it is not recommend for new designs,
but the problem is that the Switch/Reset lead was acting as an antenna and
shutting down or glitching the main power for some reason. Get the 3
terminal LM2940-5, it is the automotive equiv. of the 7805 and has better
specs. like the LM2935. Keep us posted.
Sandy
At 11:56 AM 5/14/98 -0700, you wrote:
>Fellow EFI'rs
> Well I did it! I finally got around all the noise. For starters the
>system wasn't in a box...fixed that. The real problem seemed to be the
>voltage regulator I was using (LM2935). It was resetting the CPU every
>time the ignition fired. Fixed that with a 7805. Then I put a huge choke
>and cap on the power leads. Fired it up....and problem solved. Not long
>after that I had my engine running on EFI! I still have lots of dyno
>testing to do and fuel maps to figure out, not to mention making it learn
>on its own...but that is the easy part right? Anyway thanks for the
>help...I'll go into more detail on the system after I get some sleep.
> Thanks again,
> Chris Vondrachek
> University of Portland EE student
>
>
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