WD2002SJ Bench Power Supply
In progressModifying a $10 LTC3780-based buck/boost converter for use as a bench power supply.
Turning a cheap WD2002SJ DC-DC converter board (built around Linear Technology's LTC3780) into a proper bench power supply, with plans for an enclosure, front-panel voltage/current displays, multiple input connectors, and fused outputs.
Gallery
Bill of Materials
Updates
Project Suspended
Pausing work on this project — new baby, prioritizing other things for now.
More Research
Compiled reference materials on benchtop power supply design, including tutorials on selecting power supply features and discussions comparing linear vs. switching supplies.
Gathering Information
Gathered reference materials including the LTC3780 datasheet, blog posts from other makers who had modified this module, instructional videos, and both Chinese and English documentation. Outlined initial testing plans to manipulate pin 9 (FCB input) to explore constant voltage/constant current modes, and documented goals for enabling operation-mode switching.