[Soekris] Can we run Soekris through 12v battery

Chuck Yerkes chuck+soekris at 2003.snew.com
Fri Jul 25 21:04:59 UTC 2003


Were I to actually be looking at this for real, I
might get an inverter, hook up an oscilliscope (or use
one of those $800 flukes) and attach it to the "12V" output
and use the car for a bit.



Quoting Henry Spencer (henry at spsystems.net):
> On Fri, 25 Jul 2003, Jim Gifford wrote:
> > > In principle, yes.  In practice, you *don't* want to just hook your Soekris
> > > up to your car's electrical system.  Car electrical systems are extremely
> > > noisy, and are notorious for huge voltage spikes and other problems.  
> > > Electronic devices which are not designed for that environment will not 
> > > last long without quite extensive power filtering.
> > 
> > As I was about to do this very thing, what would you suggest as an
> > alternative?  Stepping the 12 volts down to a nice (hopefully clean) 5
> > volts?  A capacitor in the power line to filter out the noise?  Perhaps
> > one the the noise filter blocks like I use for my amateur radio?
> 
> It's hard for me to give specific advice, as it's an area I haven't
> studied closely.  My impression is that seemingly-gross overkill is the
> preferred approach:  a commercial noise filter, a hefty capacitor, a
> conversion to 5V, and an MOV to clip any remaining spikes seems like a
> good start. 



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