In the theme of the site's motto, "share what you make" I would like to present this power supply that I made. I would like to point out first though that this is not my original design. I found this schematic along with many others on the Internet. I prototyped a few and liked this one far more than other ones similar to it. So I made a permanent version of it for myself to have, and use.
Features of the circuit:
Adjustable Voltage 1.2- close to maximum input
Adjustable Current once a set threshold is hit voltage drops to maintain a constant current
Low Parts Count
High Current Output
This is one bad boy of a bench power supply! It is the one you want to build. Take it from a guy who has built dozens of power supplies over the years. I am proud to have this gracing my electronics workbench today. It is my primary go to power supply when I am noodling around in my shop today.
In the image I am load testing the supply over 100 watts and it isn't even breaking a sweat. The heatsink didn't even warm up. The analog meter is on the 10 amps scale and is reading 8 the digital meter is on voltage and reading 13.7. 8 X 13.7 = 109.6 Watts!
I have no doubt my supply can deliver beyond 300 watts with the components I have used to build it. More on that later.