J
James Roberts
Guest
I have a device that runs on 4 x "AAA" Ni-MH cells, being 4.8VDC.
I would like to be able to plug in an external power supply that will
charge the cells while in-circuit. The device does not need to run
_while_ being charged, although this would be a plus.
The charging duration will be operator-timed, so it does not need to
be electronically monitored.
Can anyone suggest the simplest schematic for this based on input from
an ordinary 6 or 9VDC regulated wall pack? Is a constant current
source strictly necessary?
All schematics I have found are for complete chargers that require the
cells to be removed and charged individually.
Thank you very much.
James
I would like to be able to plug in an external power supply that will
charge the cells while in-circuit. The device does not need to run
_while_ being charged, although this would be a plus.
The charging duration will be operator-timed, so it does not need to
be electronically monitored.
Can anyone suggest the simplest schematic for this based on input from
an ordinary 6 or 9VDC regulated wall pack? Is a constant current
source strictly necessary?
All schematics I have found are for complete chargers that require the
cells to be removed and charged individually.
Thank you very much.
James