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Powering digital picture frame at art shows

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Forum topic by yellowtruck75 posted 10-31-2011 04:17 PM 774 views 0 times favorited 2 replies Add to Favorites Watch
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yellowtruck75

410 posts in 1721 days


10-31-2011 04:17 PM

I bought a digital picture frame this weekend that I will be using at tshows to display work that I was unable to bring. The issue that I am facing is powering it when there is no power available. Does anyone use battery packs for power during shows? If so what do you use?


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crank49

3434 posts in 1625 days


#1 posted 10-31-2011 05:08 PM

That would depend on the picture frame.
Does it have an AC adapter?
What volt output (and amps) is the adapter.
If the adapter says something like 12VDC, 250MA, you could run it off any 12 volt battery with 1/4 amp capacity.
The next trick is to figure out how to connect the battery. You have to determine what the polatiry is. Hooking it up backwards might fry the picture frame’s electronics. And you will need a plug like the one on the adapter.

OR, just take a 12 volt deep cycle, gel cell or AGM type battery (like you would use for a trolling motor) and hook it up to an inverter to get 120VAC. Then you plug in any thing you want; within the inverter’s capacity of course.

-- Michael :-{| “If you tell a big enough lie and tell it frequently enough, it will be believed.” ― A H

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David

196 posts in 1318 days


#2 posted 10-31-2011 05:33 PM

Be careful hooking it up to a 12V battery, the actual voltage will likely be higher. If you’re feeling ambitious you could pick up a 7812 voltage regulator (usually good up to 1-1.5A), a little self-adhesive heatsink, and guarantee that you’re getting 12V. The problem is sometimes to save cost the power supply components in small consumer grade electronics are selected such that they won’t tolerate much over their nominal supply voltage. I’ve fried stuff by going only 1V over nominal. Cell voltage for a lead acid cell hot off the charger can approach 2.5V, or 15V for 6 cells in series like your standard 12V lead acid battery.

-- Perilous to all of us are the devices of an art deeper than we ourselves possess. --Gandalf the Grey http://davidwahl.org/category/woodworking/

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