Simple Linear Adjustable Power Supply Tutorial (Based Around LM317) Part 1/2

[VikingNightmare]

Hello, could you please give the calcultions on building a transformer as well, because i have searched everywhere and i just can't seem to find them, or can't seem to find them in a way that i am able to understand it.

Thank you

[JumperOneTV]

@VikingNightmare I don't have any formulas for building transformer at hand, but if you search some more you'll definitely find them! Maybe just change the search pattern. Or browse more forums for that info.

[narendravfx]

Great, useful and very easy explained thanks a lot...........

[JumperOneTV]

@directcurrent10 just watch at the waveforms in the video again, bearing what I explained in mind.

[JumperOneTV]

@directcurrent10 smoothing cap in that circuit acts like a _temporary_ energy storage. After bridge rectifier you're getting a very big voltage fluctuations (voltage goes from 0V to whatever transformer can provide). But for voltage regulator (LM317) we need to get more stable voltage. So, when voltage after rectifier goes up - it charges the smoothing cap and powers our circuit(let's say a light bulb), and when voltage goes back to zero, capacitor powers the circuit instead.

[pinzponx]

That is amazing! Your videos are very informatic :)

[Marcin1990]

Fantastic video! Very professionally done, some humor in it is rather humorous.

Just a small question, are you Russian, and based in Russia, or something else? If so, is it hard to source these parts, or are there Russian equivalents of Mouser/Digikey?

[JumperOneTV]

@Marcin1990 Thanks! I'm Ukrainian, and I speak Russian. What you mean by "source these parts"?

[Marcin1990]

@JumperOneTV Source meaning, how did you get them in Ukraine? I am just curious because I am not familiar with how electronic part distribution is done in other countries. Did you salvage the parts from other electronics or buy them online or did you buy them in a local physical store? Just curious :P

[JumperOneTV]

@Marcin1990 The usual way. You can order parts online from local Ukrainian stores, you can order them from China or US (but delivery cost for parts from US is rather expensive) or you can buy them in local physical store(s). I live pretty close to bunch of some good physical stores, so I usually buy parts there. Some parts, like precision resistors, etc. I order online.

[fenclu]

@JumperOneTV I'm from Poland :)

[JumperOneTV]

@fenclu we almost neighbors :)

[4lifeNerdfighter]

thumbs up if here from hackaday.