I need to make an external power source for my ART II Phantom power box. The box takes a 12Vdc power source. What I have done is get a 8 AA battery holder from Rat Shack, that will put out the 12Vdc needed. Since I have 50 or so rechargeable AA batteries, that is what I would like to use. The box also takes two 9v batteries, but most 9V batteries are around 250mAh. By using my 2600mAh, AA batteries I know I will have more then enough current available, and should have much longer battery usage.
Now for the project.....when buying the M power plugs, wires and heat shrink, I saw some small project boxes. I thought it would be great to use one of those to house it in, and since it is bigger than the batter holder, I'd like to add a plug to recharge the batteries, and a little light led to know how much of a charge is left in the batteries. This is what I have no idea how to do.
I do understand basic electronics such as parallel and series circuits, but it has been 20 years since college electronics so I'm very rusty. In fact I was going to put two eight battery holders together in parallel to get 12 Vdc @ 5A, but then thought that is probably overkill.
Can anyone point me in the right direction to pull this project off.
Thanks to all