I've got a little robot, it will runs on 12 or 16 NiMH batteries organized in groups of 6, 6 and 4. All batteries in one group are of the same type, however, not all groups are of the same type (they are NiMH, but not the same capacity, manufacturer etc.). Charging them means taking them all out and using a normal charger. They are all connected in series, like this:
Where each '+' symbol indicates a connection, that is connected to a central charging connector (which I implemented for the case of an event that I'd get bored of charging them the old fashioned way, which has just occured).
(thanks for reading so far ;-) )
The question: From what I've read so far ( http://www.powerstream.com/NiMH.htm and some else) charging them should be relatively simple. However, can I charge six (of the same type) serialy connected batteries in the same way, I'd charge just one (a constant current source, approximately described in the text, that will stop at U=1.78*nubmer of cells)?
Oh, and I've found this little bugger:
But I guess the same job could be done with an LM317 current source and an AVR.