EEVblog - 2011-11-26
PART 2 is HERE: http://www.youtube.com/watch?v=6Otr1I0OR18 Dave shows you how to design a simple constant current and constant voltage lab power supply that can be either software (PIC/AVR et.al microcontroller) or traditional pot controlled. Starting with the venerable LM317, and ending up with an LT3080 solution, and the some thought processes that go into it all. Part 1 is the conceptual design of this Open Hardware design.
This is brilliant! You should do more of these longer "let's build something" series
No, it's my natural voice.
Available in my Mech store. I drew it myself.
you posted this in 2011 and still this is like the best video that explains how to make a power supply design ! thanks very much for this !
@mitpatterson It's orange :-> That's just the colour of various length pre-cut jumper links I have. I am using red and green for the power rails if you look on the left side.
@Turkeylegs39 Have considered splitting into channels, but it just dilutes the content and the audience. I can't think of any benefits that outweigh the downsides.
dont listen to them, love the tapping, tap tap tap tap awayyyyyy
Oh man, I need more studying before I'm going to understand any of this.
4mb127 need more doing...
@PetrFM Part 2 spoiler alert!
Tap tap tap
yes, the tapping does get old
Stop with the pen oh God 😂
please no more tapping on boards and screens!!!!!
I watch all the videos except the ones with tapping.
@SajjadBro You mean actually getting a PWM signal out of a microcontroller? There are plenty of tutorials out there on how to do that.
@joshstube Look at the LT3080 datasheet, you can parallel up devices to easily increase the current capability. It's 1A because that's all I wanted for my supply design. There are a zillion high current high voltage lab power supplies out there, this isn't going to be one of them. I may consider increasing to 2A by adding another device though. All will become clear in time.
@zox012 Yeah, I know. It was supposed to be one episode and I shot most of it thinking that, but when I got to editing, as is often the case, I was surprised at the amount of footage I shot. It was far too long, and kinda made sense to split up into a couple of episodes. So it should be at least 3 parts now.
Dave the coolest guy I ever know!! Keep sharing your knowledge Dave, thanks a lot!
I have 40 years of electrical engineering experience . Just out of curiosity I looked at your video. I must admit it is an excellent presentation. I liked very much the ingenious way you build the presentation with all the "twists" in the design.
Thank you very much for the brilliant presentation.
meirbns exactly what you did as an EE? 😃
Looking forward to the rest of the tutorial. I like how you evolved the design from using more components to a little more elegant with fewer components.
@scientist375 And the Makezine videos are quite lacking in detailed explained content. If you like that, fine, but it's not the way I like to explain stuff. I chose to show you some of my thought processes in the design, and that takes time. You can't magically shorten it, there is only so much you can fit in 5-10 minutes.
My new favorite video blog - thanks for all your work on these Dave :)
Thanks you, this was one of your most interesting videos yet, taught me a lot!
@scientist375 Sure I could drop a few minutes here and there if I used a script or went and re-shoot some parts to make them tighter, but it might get 40min down to say 30min at best. You can't magically compress 40 minutes worth of material into 5 or 10 minutes and keep the same content and explanation. I could make this video 1 minute long and say here's the schematic I prepared earlier, but what's the fun in that. The next video will be 20-30 minutes of looking at datasheets and tweaking
I personally much prefer proper, long form videos like you tend to make. It allows you to explore as in depth about the subject matter as you are so inclined. I love that, tbh.
I love your 555 T-shirt
Give me current!! Give me current!! :D
i really can't express how helpful and useful this tutorial series is! Thanks a million for describing in so much details, it's like a 2nd year uni stuff for someone who never did Electronics beyond college. Love it!
"If you don't have specs to work from, well, it's gonna be a dog's breakfast."
Where do you come up with these great expressions? I love it!
He's from down under. I have and aussie friend he says things like that all the time.
perfect, thanks for the answer, i will try! thanks again. :)
Could you make a follow up video but with a switching power supply, buck/boost converter. Also it would be interesting to see a dual rail power supply.
This video is great, but the trapping is driving me nuts! Lol thank you for the amazing content, and thank you for teaching a person who is learning to solder, and build electronics on their own!
Awesome first part, look forward to the follow up finishing it off! One question though, whats up with your right thumb dave?
I needed to see this. Thanks so much for the great videos!
This is great! Thank you for making these very honest detailed design tutorials.
Hi Dave, thanks for taking the time and effort to make this video :) I'm confused at the 8:00 part though, what are the bypass caps for? Is this to emulate a dummy load?
Thanks
Hi Dave,
Would you please consider doing a tutorial on MPPT Solar charge controller design?
Thank You
You're the best. Thank you.
@Vlakpage Didn't know about that, thanks. Yeah, a bit pricey!
Thank you Dave for these outstanding videos. you have a lot of background in electronics Are you engineer?
Thank you Mr Dave. It is a very good tutorial. I learned a lot. Now I am off to part 2.
Dave, I love you man... but please, I beg you... please stop tapping the whiteboard with the damn pen!!!
Overlord, I think I love you too, I was about to put the same message in, quickly read the comments and hey, you worded it perfectly!
I was not the only one that was annoyed with the pen 😂
Calm down, guys. It's not like nails across a chalkboard.
This is great... I'm learning a lot! Thanks!
Bingooo !!!
I learn a lot from you, i appreciate your videos. you have a massive amount of talent. keep up the good work. thank you.
You got my head spinning there. :-D
Great Engineer Dave jones, Thanks.
ELEGANT! Give us part 2. We cannot wait! :) These tutorial-blogs are very stimulating. Almost addictive.M
^.^
Dave, I tip my hat to you. I've been pulling my hair out trying to work out how this is done and why the adjustable voltage is so simple yet the current limiting looks so complicated, but you have really spelled it out in a very descriptive way. Thanks so much!
Thank you for the great explanation!
@EEVblog
Stm32f1 With integrated DAC only 2 bucks. Love those!
Dad Brad - 2014-07-12
What a fantastic day and age that we live in where generous individuals like you can teach through tutorials like this. Thank you so much for taking the time to do this, especially the theory explanation, I absolutely love it. Keep doing what you are doing!
EEVblog - 2014-07-13
Thanks, glad you found it useful.
TechnocraticBushman - 2014-11-13
@EEVblog I am an almost complete newbie and looking through LDOs to build my own power supply (like real men do). I saw your new rigol PS and I figured I can code the software for one just like it, with color display, a nifty graycode encoder and all. I came across the same part and pretty much came up with the same schematic, except for the buffers which are an awesome fix I could not figure out (thank you for the opamp explanations as well. I finally understand the t-shirt). This tutorial is by far the best I've seen, for people like me, as it explains the train of thought that went into designing this which is far more important then etching techniques or explaining how to drill holes in aluminium. I also wanted to get more then 1 amp from it so what I did, since the part is based on a comparator, I put a PNP from vcc to output and it is opened by the IN pin. Now I can get it up to 10 amps with proper cooling and a huge transistor. Spice shows some 20ma through the IC for a 3 amp output so I suppose I can get it up to 15-20 amps no problem, with an even bigger PNP and more cooling and it's still dirt cheap.
ArumesYT - 2019-10-07
Well, generous... He was getting paid pretty well already by Youtube when he shared this information. Don't get me wrong, I have nothing against David or this channel, I'm learning a lot from his videos too. But you have to be aware there's not just generosity at play here.