As well as static electricity,RF interference etc. you could have half a
dozen high current relays clicking on and off especially on a 24v
truck,lights,wipers, flashers, air con.A 60v spike is not uncommon in
motorcycle wiring loom...with a failing voltage regulator i measured 75v on
a 6 volt system (a Honda 50cc bike) anything is possible IF you dont expect
it!
----- Original Message -----
From: "R. I. Nelson" <rindesigns@charter.net>
To: "Microcontroller discussion list - Public." <piclist@mit.edu>
Sent: Tuesday, November 15, 2005 10:16 PM
Subject: Re: [EE] Semi-Trailer Battery Power Filtering


>
>
> Shawn Mulligan wrote:
>
> >Thanks Larry.
> >
> >------
> >nasty environment. Spikes and long term surges caused by all sorts of
> >things like use of air brakes,
> >------
> >
> >
> >
> How do you figure use of air brakes is going to cause an electrical
> spike?  The only electrical I know of involved is the brake lights and I
> doubt the will do much spiking.  even the compressor cycling on and off
> is done with a non electrical  air switch.
>
>
>


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