DIY Variable Power Supply With Adjustable Voltage and Current : 14 Steps (with Pictures) - Instructables
Build a Variable Lab Bench Power Supply : 22 Steps (with Pictures) - Instructables
Adjustable Power Supply DIY Battery Charger - TRONICSpro
Paul's DIY electronics blog: Building a Bench Tracking Dual Voltage Supply
DC Bench Power Supply 30V 5A Adjustable 3-Digital LED Display, Switching Lab Power Supply for Etching Aluminum, DIY Project, Repairing: Amazon.com: Industrial & Scientific
DC Bench Power Supply 30V 5A Adjustable 3-Digital LED Display, Switching Lab Power Supply for Etching Aluminum, DIY Project, Repairing: Amazon.com: Industrial & Scientific