overture
Newbie level 5
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This is a battery pack for old Zenith Transoceanic radio. It has two different output voltage. (9V and 90V). I am making a pack using 75 AA Ni-MH cells (each 2300 mAH) for the 90V supply and 8 D cells (each 9000 mAH) for the 9V supply (can live with a little higher voltage). Now, charging this pack would be a mess if I have to charge the individual cells using 4 in a bank (using the usually available chargers). If I could make a charger to charge the pack as it is (without taking out the individual cells) it could have saved a lot of hastle. Can anyone lead me to some information for circuits suitable for this type of charger. Thanks