How to Set up and Use a BK Precision Power Supply By Freda Johnson on February 24, 2015 in Projects, Tutorials, Videos This video describes how to set the current limit and use an BK-Precision power supply. Constant current and constant voltage are discussed. Note: Use power supplies in dry areas away from flammable objects. BK Precision, Current, Electronics, Engineering Technician, physics, Power Supply, Technologist, voltage