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AC adapter for cordless power tools?
gryhnd:
I wonder if you could follow this instructable using this power supply (assuming 18V).
ahofle:
Thanks, that looks like a good start. Although he is using a really crappy walwart and leaving the NiCd cells in the battery (I want to get rid of those completely and just have an AC adapter). It sounds like I just need to determine the maximum current draw of the tools and get an adapter that supports at least as much.
drventure: I'll update this post when I get it sorted out.
Kevin Mullins:
--- Quote from: ahofle on January 13, 2010, 08:14:23 pm ---Thanks, that looks like a good start. Although he is using a really crappy walwart and leaving the NiCd cells in the battery (I want to get rid of those completely and just have an AC adapter).
--- End quote ---
Yeah, that guy in the instructable was just "charging" his battery as he used it..... that's why gryhnd pointed out that other power supply to use instead and gut your batteries.
gryhnd:
bingo.
BTW, I use a 12V version of what this looks like a twin of to power an automobile audio amp (60W x 4) which drive bass transducers in my home theater. They are pretty inexpensive. The eBay listings are direct from China...mine did come from a US vendor fwiw, for about the same price.
ahofle:
Gotcha. I actually need 19.2 volt but that one would work perfectly for my dad's dead 18V battery. Looks like that site has an adjustable one that goes up over 20V: http://www.powerstream.com/AC-A0407.htm
That's still about half the price of a new 19.2V Lithium ion battery.
It says it's rated at 4.5 amps at ~20 volts. If the tools draw between 2 and 3 amps, that would be OK right (ie. it would only draw what it needs)?
I guess that's my main concern. I don't want to overpower anything.
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