DIY Mini Lab Bench Power Supply (With Switchable DC and AC Input) - YouTube
DIY 300W AC DC regulated power supply - Homemade constant voltage, constant current power supply - YouTube
DC Bench Power Supply Adjustable 30V /10A, 3-Digital Switching Regulated Lab Mini Power Supply Single-Output 110V, with Alligator Leads, for DIY Electronics Testing, Repairing& Researching: Amazon.com: Industrial & Scientific
Mile Kokotov - PSU 0-30V / 0-3A
Designing Simple Power Supply Circuits | Homemade Circuit Projects