dc power supply

I got a 3 wired HP charger that i want to make into a power supply. The wire colors of the charger is blue, black and white. How do i approach it? How do i deal with the third wire?

Hi. I have a 12v 8kw diesel heater. I'd like to conect a mains power supply. My question is what amp unit would be suitable. The heater is fitted with a 20amp fuse. Would a mains 240v to 12 DC 20amp be OK or I've see alot of youtube videos of people using the 30amp power supply rather than a...

If you are using several different DC voltages inside a unit, (say 5v, 12v, 48v) ignoring efficiency, would it be better to use separate AC/DC power supplies for each voltage or use 1 AC/DC power supply for the highest DC voltage and step down the voltage with DC/DC converters from there?

Hi Guys, I have a Gophert NPS-1601 variable bench DC power supply and a number of single voltage supplies. They all work well but lack split-rail capability. I have a project coming up that will require plus and minus supply rails so would like to add a minus output post to the Gophert...