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Re: [Shop-talk] 12 volt benchtop power supply?

To: Team shop-talk <shop-talk@autox.team.net>
Subject: Re: [Shop-talk] 12 volt benchtop power supply?
From: Brian Kennedy <kennedybc@comcast.net>
Date: Tue, 12 Jan 2010 17:27:07 -0800
Jim, if you have a charger that has a start position, you might look at that
as a source. Looks like you'll need about 10 amps or so. Starting current is
100 A or so for a short time, so it might take 10 amps for long enough to
get your work done.
Brian K


On 1/12/10 5:03 PM, "Jim Franklin" <jamesf@groupwbench.org> wrote:

> On Jan 12, 2010, at 7:17 PM, John T. Blair wrote:
>> 
>> Jim,
>> 
>> Do you have any idea of how much current the entire trailer lighting
>> takes?
> 
> The 1157s use 3 amps each, times 2, plus 4 169 running lights. 10
> amps? 12?
>> 
>> Would you be willing to live with a 120V power cord plugged into the
>> wall?
> 
> Absolutely. That's what I'm looking for.
> 
>> 
>> You'll need a 120 to 12 V transformer.  The 12V side will need to be
>> rated for
>> about 1.5 times the total current the trailer needs.  Then a couple
>> of diodes.
>> You could get fancy and add some filter caps and you'd be all set.
> 
> Well, I don't want to spend more time sourcing/building one than I
> will using it, otherwise I'd rig up a battery & charger. I just find
> it hard to believe I can't walk into a store and buy a 12v power
> source. Surely mechanics use this all the time?
> 
> jim
> _
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