How I Made A Linear Bench Power Supply

I absolutely love your approach to video making. You were guiding us through the process of designing a linear power supply step by step. Keep up the good work mate 😊

An excellent video!

I feel like you overcomplicated the current limiter - in my power supply I used an LM324N and a MOSFET for the current regulation, and it limits well without the shunt voltage amplifier with 0.1 Ohm shunt, but then again I also didn't use an LM317 for the voltage regulation, but an LD1084V without the minimum voltage compensation, as I don't work with circuits that reqire such low voltages. Anyway, great video, keep up the good work!

Nice video, loved your use of the LM358. I recently used it to make a sound amplifier from 0-5V with a 2.5V offset and it sounded relatively clean (depending on the speaker frequency range as well) its not the best for sound quality but it was alright as long as signal doesn't clip

Awesome!

Bravo on all your hard work. Bravo for sharing it with us. I offer the following questions, without intending any criticism... You built a linear supply' which has the significant advantage of being a non-switch-mode low noise source. Then, you used a charge pump within the circuit. A charge pump uses switch-mode operations, as you know. So, did you add back the noise that you were trying to keep out? I am still thinking about that. You used robust components to build the fixed negative supply, to enable true 0-12V operations. Might it be useful to make the fixed negative supply to be variable, as well? Then, you would have a -12V to +12V supply with the ability to trim it to 0V. I have not thought this completely through, but I think that you have already incorporated the main components. Maybe it is an idea for you for a future build? Two small things to help our understanding. Please post a complete schematic at the front of all your videos. This way, we can refer to it, as we follow along in the lecture. Yes, I know that you posted it on your website, but that is not so convenient, when watching the video. As you are reading your text from a script, please remember to speak slowly and use pauses. We need time to understand what you said and to incorporate your present points with your former points. I offer these things in the spirit of Community. I hope you take them that way. You did great.

I don't know what it"s like in the Americas, but in Western Europe, Poland and Czechoslovakia, the LM723 integrated ciecuit was commonly used in linear power supplies.

Love this power suplly video, one of the best and I have watched many! Is it possible to connect two of these supplies in series, to make +12v 0v -12v? As many audio circuits use this

Nice video! And did you add the soft start section in your final schematic?

Re heat sinks. Drill ànd tap for 220...

Is the ground on the AC side and the DC side same or are they isolated?

You could use a ~45 degree normally open bimetal switch to turn on the fans. I didn't notice you mention any earth grounding plan during the construction of the video, but I hope you wired earth ground to the case and the transformer.

Hey! Nice video as always. Btw, why not put the lm317's voltage divider after the current sense resistor? That basically removes the effect of series resistance from the circuit and improve the load regulation. It will obviously sense extra current of the voltage divider but thats small. Thus current regulation only slightly worse but voltage regulation much better specially if designed for high currents.

The design is fine and all but IMO too many ICs, especially for a beginner, i built mine using only LM358 and damn is it unstable but you basically cannot kill it xD

Nice job but speak way to fast for me to keep up lol. You give my brain no time to even think about what you’re doing