Episode 772
Let's look at a switch mode power supply. Reverse engineer and draw schematic. Then look at the design. A basic introduction to switching supplies.
My videos on DC-DC converters:    • #689 DC-DC Boost Converter Basics (pa...  
Power supply used: https://www.banggood.com/custlink/vKK...
Be a Patron:
  / imsaiguy