here is an power supply i did with a laptop power supply, and another NDS charger, and a buck Dc to dc converter, they can deliver about 16.5 Volts with a maxium of 9 amps at 1.25 volts.

in the photo i put a burn in test, burning a pencil lead literally, take about 20 seconds to get fusion point due to incandensence,

NOTE:do not attempt do this, if you know how hot this thing can be, use you leads for draw, not for burn yourself please.

the Materials i did this is:

-An Satellite decoder chassis, which is pure garbage btw.
-an old laptop power supply, can deliver about 16v at 5.0A
-A buck dc to dc converter, for get variable voltage and amps.
-An NDS charger for supplying voltage from Voltmeter/ammeter and power led.
-a ton of wires.

BLue led Shows is turned on
Red led shows when is under load over 50 mA

Although im a Eevblog fan, and i have a ton of knowledge about safety stuff, this is not anything that someone profesional can have over their benches, but i think is enough for get the basic stuff for power simple electronics building by yourself.

i did the leads with thick wires for being sure these dont have a voltage drop.