I have at least 6 UPS. Can it be done? How difficult would it be?
Select as Best AnswerUndo Best Answer
Do a search online for variable DC power supply schematics. That will give you the list of parts your looking for. You may be able to find some of the basics like resistors and capacitors inside the UPS but you'll still need a variable voltage regulator like the LM317 to run the thing. You won't find one of them inside a UPS.