Hey,
I'm currently looking for a bench power supply. One thing I would like to play around with is mosfets controlled by an arduino. So I'm looking for a dual channel supply. And since I want to play with Mosfets I also need 10+ Amps. I'm basically looking for something versatile, so 60Volts, 15 Ampere maximum.
But it seems like that doesn't really exist, or I'm too stupid to find something on Ebay (used or new). And these things get ridiculously expensive quickly.
So my main question is: Why is it so hard/expensive to build a 60V 15A (900W) variable power supply?
Besides that, there are a lot cheap power supplies for around 80USD which are capable of providing 30V 5A. I expect a dual supply to be twice as expensive but I'm really having trouble to find one of those.
Am I expecting too much? Another thing I would to play with is creating an ESC for a quadrocopter motor using an Arduino and some other parts, which means I need a current of around 20-40Amps.
Edit
It seems like my best bet is to use two DPS5015(33USD) along with a switching mode Power supply 25A, 48V (70USD). That would cost me 136USD for a dual channel, 48V 12.5A/channel power supply. I'd rather prefer a finished box which I can just put on my bench, instead of putting it together on my own.