Should i buy a charge controller?
What is a simple circut i can put into a battery pack to show green or red for low and high?
Im thinking that i might rather buy a controller, but it needs to be able to charge all kind of cells from "AA" to 12V DC. I just want it to show a red light as the cell is topped up.
I searched last night, but didnt find anything specifically how i want it. So mayeb its just something you guys buy for cheap?