[Shop-talk] 12 volt benchtop power supply?

[John T. Blair]

At 06:49 PM 1/12/2010, Jim Franklin wrote:

 >I'm debugging some trailer wiring and would really like to have a 12v
 >power source that could handle 6 bulb's worth of current, rather than
 >leaving the trailer plugged into the car, or having a battery on the
 >benchtop with a charger. Is there such a beast? I'm finding lots of
 >super pricy clean power devices but all I need is a $20 black box.

Jim,

Do you have any idea of how much current the entire trailer lighting takes?

Would you be willing to live with a 120V power cord plugged into the wall?

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.

John


John T. Blair  WA4OHZ     email:  jblair1948 at cox.net
Va. Beach, Va
Phone:  (757) 495-8229

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