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How can I portably power my old slide projector on the go? [more inside]
posted by stleric on Aug 7, 2011 - 6 answers

I have two DC electric wires: one is positive, one is negative. Without buying anything, how can I tell which is which? [more inside]
posted by brenton on Jul 27, 2011 - 16 answers

If I use a 19.5 volt 4.7 ampere adaptor with a device that calls for a 19.5 volt 3 ampere adaptor, will it cause any problems?
posted by matkline on Mar 14, 2011 - 7 answers

What DC voltage does an average LCD monitor use? [more inside]
posted by leafxor on Mar 27, 2009 - 4 answers

Like most mefites, I have far too many gadgets, and the wall warts to match. I suspect most of them could be replaced with a single USB charger - is this something that already exists? [more inside]
posted by spaceman_spiff on Dec 28, 2007 - 8 answers

IsraelFilter: Where can i Buy This Powerthingy In Israel? [more inside]
posted by Izzmeister on Sep 24, 2007 - 3 answers

TransformerFilter: I've just relocated to the US and have a rechargeable drill that uses a 17V DC transformer. I need to replace the transformer, since the one I have runs on 240V power (and has the UK prongs). The problem here is that I can't find a suitable replacement at the likely suspect places: hardware stores, Radio Shack...

I know that the voltage must match precisely and that the amperage must be at least as high as the noted amperage, and that the polarity must also match. So where can I go to find a good transformer? I'm in NYC, but I prefer to shop online.
posted by yellowcandy on Nov 28, 2004 - 9 answers