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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