I got a 750W (12VDC, 62.5A) power supply (I don't have it with me right now so I can't remember the model) from a old server and I was thinking on using it to create a lab bench power supply. My question is if it's worth it. I don't have any power supply and I can't afford spending much money on one. I'm a beginner in electronics so it would also be a project to get some experience from. I was thinking on using some components to have some fixed voltage levels and also a adjustable one. I would like if someone could give me some advices on this.
The components I was thinking of are: 3.3V - LM317 (1.5A max) and other regulator for more max current. 5V - LM7805 or LM317 (both 1.5A max) 12V - Directly from the power supply
Adjustable: LTC3780 (1-30V) (10A), using a display to show voltage and current and a few potentiometers.
Is this worth the money and time? Both for usability and experience.
Also, is it possible to have both positive and negative voltages?
Thanks in advance!