When building projects professionally, I try to take every shortcut possible to accelerate learnings around an idea and get useful results to inform the next iteration. When building projects personally, I do basically the opposite. Often when starting with an idea, I’ll find that it would be helpful to build a tool to execute on the idea cleanly, so I switch tracks to building the tool. Sometimes, when trying to build that tool, I’ll find that I’m missing some other tool and build that instead. This is one of those.
I couldn’t find an adjustable power supply in my house (I think my personal one became property of Oculus at some point), and I couldn’t find a small simple one that I liked online, so I built the one I wanted. This is just a 3d printed housing with a PD Buddy USB Type C board, a Rui Deng DPS5005 Switching Power Supply, and banana plug terminals inside. It supports around 0-19V output from a 20V Type C power supply like a MacBook Pro charger and up to 5A. Rui Deng’s DPS3005 would technically also be sufficient if you want to save a few bucks. The result is a cute little adjustable desktop power supply that solves for what most of my projects need. The OpenSCAD and STL files along with assembly instructions are on Thingiverse.