Testing a 3-36V 60W adjustable switching power supply KJS-1509 made by Kejiesheng. It's in a laptop power supply shaped box with a potentiometer and a built in 3 digit LED display voltmeter. Let's see if it's any good, what's inside, how safe (or dangerous) it is and how does it work, including the full reverse engineered schematic.
Please support my channel on Patreon:
https://www.patreon.com/DiodeGoneWild
Instagram:
https://www.instagram.com/savage_danyk/