2018-8-1 · ABS-AMERICAN BUILDING SUPPLY, INC. 4 American Building Supply, Inc. 3/17 Standard Powder Coated Finishes Misc 689 Aluminum 690 Dark Statuary Bronze 691 Light Bronze (Dull Bronze) 692 Tan 693 Black 695 Medium Amber 696 Brass (Gold) 1B Black 1D Black 1DM Black-bright brass bearings & tips 2C Zinc plated, commercial 2CD Brushed zinc plated …0-30V Variable Power Supply circuit Diagram at 3A ...2021-7-20 · This is a 0-30V Variable Power Supply circuit diagram. I recommended this. Because you can adjust an output voltage of 0V to 30V, at 3A current, and overload protection. Also, It is a high-efficiency regulator using an IC regulator, UA723, and power transistor, TIP3055. So, it is a small laboratory DC Power Supply at an inexpensive cost.