Creating Universal AC Adapter
Posted on 2011-03-08
I am sick and tired of misplacing AC adapters. I have a drawer full of various ac adapters, with literally 20 different types and still it seems I can never find the correct type, because the voltage or amp rating are always different. A quick web search of variable AC adapters returns products that are still very limited in DC output voltages, usually supplying a range of only several different voltages.
I would like to buy a variable DC power supply, perhaps 0-30V rated to deliver around 3 amps, (maybe even 5 amps to cover everything) a couple of allagator clips, and a crapload of DC device plugs. This way I can dial in any of the millions of different voltages that home electronic products require as input. Hopefully a 3-5 amp power supply will cover anything as most charging requirements are between 100ma - 2A. It's my understanding that as long as the power supply provides enough current for the charging device it's ok to hook up a 50ma device to a 3 amp power supply.
With the DC converter plugs I'd like to just strip and solder longer wires that would then connect to the variable power supply. Maybe even buy a little breadboard with plus/minus plug in connections for power supply and DC adapter plug.
1. Is this a good solution? and if so....
2. What are the positive and negitive connections for DC female plugs? Is the inside positive and the outside negitive? Or is that also variable between devices (wouldn't surprise me).
3. Same question for a male DC plug (if there is any)
4. Can anyone reccomend a good variable power supply? I already have an accurate voltage meter to verify correct charging input voltages for each specific device.
5. Can anyone reccomend a good selection of plugs that will cover most home devices (from camcorders to laptops to beard trimmers) Again I would need to strip the wires for power supply connections.