I am looking to buy/build my own D cell Nimh battery charger with the following requirements: -dual prong AC wall input -charges Nimh D Cell -is safe -contained within 1" x 1.7" x 2.2" enclosure
As far as I can tell there is nothing like this to buy at the moment. I have also searched the web for a schematic and found almost nothing of use.
I have played with bridge rectifiers and basic power supplies in the past and was wandering if building something with these specs would be a possibility? Also are there any ICs that could be safely used instead of actually building the entire bridge (anything to make it smaller)?
- What would be "desirable" design traits of this supply?
- Would I need to make it a smart charger? Is a smart charger really all that beneficial for Nimh D cells?
- Can I get away with a the most basic design of 4 diodes, a cap, a regulator and 2 resistors (similar to this:http://upload.wikimedia.org/wikipedia/commons/1/1d/Diode_bridge_smoothing.svg)?
- How much current should I want to design at the load?
I realize this is kind of vague, but I have been searching the web for hours and was hoping maybe someone could provide some insight. Possibly just a starting point and then I could start designing my supply.