A bench power supply is an essential tool for all electronics hobbyists. Building one is the right of passage for every electrical engineer. My BCIT program included a 4-week course ELEX 1102: Electronics Fabrication Tools and Techniques, in which we built a very basic bench power supply.
We learned soldering skills in this course. We also learned how to use Altium Designer to design our own PCBs. In another course I learned how to use AutoCAD and designed the body for this power supply (reference design provided by BCIT).
The DC Power Supply provides three DC voltage outputs when powered by a 120VAC 60Hz source. The rated DC output voltages are +5VDC (fixed), -15VDC (fixed), and +20VDC (variable). The rated current at each output is 1A.
|C1,C2||3300uF, 20%||25V, AI electrolytic||Radial||2|
|C3, C5||0.1uF, 20%||50V, AI electrolytic||Radial||2|
|C4,C6||1uF, 20%||50V, AI electrolytic||Radial||2|
|C7||2.2uF, 20%||50V, AI electrolytic||Radial||1|
|D1,D2,D3,D4||1N4005||1A, 600V, General Purpose||DO-41||4|
|D5||Pilot light, LED, Red||1|
|F1||375mA, 250V||Cartridge, Glass, Time delay||1|
|J1||Banana jack, Red, Nut||1|
|J2||Banana jack, White, Nut||1|
|J3||Banana jack, Violet, Nut||1|
|J4||Banana jack, Black, Nut||1|
|P1||125V, 10A||1.8m, 18 AWG/3C Grey||1|
|R3||5K, 10%||1/2W, Linear||1|
|S1||120V, 5A||SPST, Round rocker, Dot||1|
|T1||33VCT/1A||33V, Center tapped, 1A||1|
|U1||7805||Regulator, 1A, Fixed, 5V||TO220-3||1|
|U2||317||Regulator, 1.5A, Variable||TO220-3||1|
|U3||7915||Regulator, 1A, Fixed, 15V||TO-220-3||1|