DIY Variable AC Power Supply

I build a variable AC power supply, 0-30 VAC on the banana jacks on the front panel, 0-140 VAC on an outlet on the back panel. I do this using a Variac (autotransformer), some ordinary transformers, a relay, and a digital panel meter. I show the schematic on the white board, and some pictures of the build.

AC Power Supply System

Power System: AC Power Supply System
Topics Discussed:
1. AC power supply system layout.
2. Why thermal power plant is constructed away from human population.
3. Why nuclear power plant is constructed away from human population.
4. Why hydro power plant is constructed away from human population.
5. Need of long distance transmission lines.
6. Need to step up the voltage.
7. Generating transformer.
8. Standard transmission voltages.
9. Line and phase voltages.

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Music:
Axol x Alex Skrindo - You [NCS Release]
https://www.youtube.com/watch?v=sA_p0rQtDXE

가변 DC전압(0~80V) 전원공급장치 - SMPS(Switched Mode Power Supply)

* 구매경로
https://www.aliexpress.com/item/33010773309.html?spm=a2g0s.9042311.0.0.716d4c4dhMZ9go

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