I would like to build a small DC power supply (or find a cheap way) that allows me to get voltages in 0 - 50V DC range.
I had a look on ebay and some electronic shops but most supplies dont get higher than 12/24V DC. I know about variacs, but they are quite expensive and seem to output only alternating currents (someone can confirm?).
I dont need a lot of amps, something around 0.5A should be enough. What I'd like to do : I have a few fans/ small electric motors (running 9/12V) that i'd like to use and push to their limits. Best I was able to get from now is 24V DC, by using -12V / +12V from a old computer power supply.
I'm thinking about buying several 12V transformers and putting them in series but it seems a rather expensive and not reliable solution.