Solved ignition noise problem...thanks all!

[Michael Farrugia]

Is the 3 Amp diode in series for protection against reverse polarity 
connection ?  If it is I have done this in another way - I have put a 
diode in reverse direction in parallel with the whole circuit, then the 
whole is connected to the battery through a high currect fuse.  Like 
this if the circuit is connected wrongly the diode becomes a short 
circuit and blows the fuse.  The fuse can also be made some 10A so that 
it does not drop any signifigant voltage.
Sorry if I went off track but I think the above is a good idea.
Michael
>
>That is very similar to what I have, main power through a fuse, a TVS 
to
>ground, 3 Amp diode feeding an inductors and related filter caps.  I 
think
>the inductor does more then I think, but who knows, I have not tried it
>without it. The diode in series is costly, but I think could be worth 
it.
>The Low Drop out Regs are nice, and they are not that hard to get from
>Digi-Key. The best thing is they are drop in, and high temp to boot.
>
>Sandy
>


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