DIY Bench Power Supply for $12 Homemade Mini PSU
To make DIY psu you need 19v 65w at least power adapter from old laptop,2x output terminals,plastic case and power cables.
dc converter IZK-4KX DC DC Buck Boost Converter CC CV 0.5-30V 4A Power Module Adjustable Regulated power supply bought from aliexpress,its cheapest one that i can found.
its not affiliate link:https://bit.ly/41B0r7c