12V 50A 600W power supply - oscilloscope waveforms
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- Опубликовано: 15 мар 2021
- Showing various waveforms in the 12V 50A 600W switching power supply module on an analog and a digital oscilloscope. It's a 2 switch forward. The waveform on the main ferrite transformer, gate driving transformer (GDT), output inductor (on an iron powder core), MOSFET gates, primary smoothing capacitor ripple, output ripple, mains input current, changes in duty cycle, transistor current and so on.
Next episode - schematic & how does it work:
• 12V 50A 600W power sup...
Previous episode - (re)winding the transformer:
• 12V 50A 600W power sup...
First episode - the teardown of this power supply:
• 12V 50A 600W power sup...
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This crappy PSU you've modded has become a valuable teaching tool! The way you explain it and show us the waveforms is just perfect!
*From dodgy to safe power supply by DiodeGoneWild*
@@agustinusreynaldi7101 it has 3v spike, it's very far from 'safe'
@@stanimir4197 And hope no explosions yet
Can you explain snubber networks in one video please? Love your channel!
Sam Ben Yaakov has some very nice videos on that topic
yes, please, saw those mentioned many times, but somehow the function and workings disappear from my memory
@@erikbertram6019 cool, gonna watch, but we also want Diode's take on it
This really should be a million-subscriber channel. That was some of the best circuit analysis and demonstration I've ever seen, and it didn't take $20k worth of test equipment to make it happen. Pure gold!
I totally agree with you. Brings to mind a wise, old saying that goes: "It is not the tools that make the mechanic, rather it is the mechanic that makes the tools". I firmly believe that this saying is true. Fred
I realized one thing in this field...the more you teach others the more you grow professionally. I'll keep sharing knowledge with others
Your statement is true for all fields
This was really awesome and very interesting... especially that shot in slow motion. Great soviet oscilloscope also.
I think it's Latvian, but you're right, Latvia was part of the USSR. So Soviet, but not Russian.
That pseudo-slowmo idea using aliasing is genius. Seems roughly analogous to equivalent-time sampling.
This really is amazing, and i wish more people appreciated it o.O
I always thought you had a old chunky oscilloscope, I now realize you have a classic irreplaceable tool that you operate with amazing precision and great ability to demonstrate it..Thanks
agree!
is it russian ?
Such a great video series! I would love it if one day you could focus on the various ways these SMPS units do feedback, showing the signals and waveforms for that. (Going back to the magnetic coupled feedback on early SMPSs)
Its amazing how many of my favorite youtubers watch eachother
LOL, lately I have been consuming a lot of Adrian’s content and a lot of Diode as well with some of Noel’s retro lab and Marco Reps. They are definitely my favorite RUclipsrs by far! Keep up the great content!
An excellent take, major props. The output ripple is actually worse than I'd have though. One more video, replacing the caps with low ESL/ESR ones..
Videos like this will teach you more about switching mode power supplies than a university course.
It actually does. True story.
Very informative video, you taught me electronics more than my university professor's. Thanks for your hard work and nice explanations.
The slow-mo scope was really cool! Really fascinating to watch the way the wave form moves around so rapidly.
It is an awesome idea to measure the transformers with simple half a turn or a full turn of a piece of cable. I am always scared to measure with my oscilloscope directly fearing I may oversee some isolation and blow it up, using those wires it is almost impossible to blow it up. Thank you for another great video Diode!
I love your old oscilloscope!
You mean the PROPER oscilloscope.
The more the technical quality of this channel improves, the more his particular accent increases. DOUBLE WIN.
I've never seen anyone talk about his accent, anyone know what it is, it's really unique !
@@cjjuszczak I believe that Mr. Danyk (DiodeGoneWild) is from Czechoslovakia. Fred
Very well explained, best explanation I've found here on RUclips. I am trying to learn electronics
WoW this is superinteressting! Great to see the scope while following the explaining. Super clear and usefull
Very cool waveforms, very nice filming, turned out amazing!
Awesome. It's good to see all that in action.
Wow. What a demonstration! This sets a whole new standard for this kind of videos. You seem to show every functional detail of the circuit.
I especially liked the slow mo footage of the sliding transient voltages. It goes a little over my head what I'm doing as a electronics enthousiast, but it's nice to know there is a full explanation that's easy to follow.
fantastic overview of operation , you have taken some time to get these "cro" shots ect , alot would not realize the time to do so , thanx so much for these vids ect
Best Electronics teacher and comedian.....love your videos and your cat.
That was a great video. Really cool to see what is actually going on in a SMPS.
Fantastic analysis and footage....thank you!
Thanks for an exelent Video. I have learned so much from you about switching powersupplys.
Good video, clever use of the camera to get that amazing slow motion.
Excellent analysis! Fantastic!
You are great in your field of work. Much appreciate your knowledge.
still waiting for the explanation and schematics for this power supply , thanks man love your vidoes
15:30 this looks f* AWESOME!!!
indeed, bruh
a very fine example why analog still matters, i was a long time a fan of CRTs, when lcds were used all around, don't care of the space, weight and power, as long it showed me a bit more ground truth
now i have 2 4k IPSs, 60 and 144hz and am not a fan of crts anymore, but the place in my heart is always there for them
I love those slow mo shots
I don't know, how many times I will appreciate you for this explanation so Miga Respect . I would say 🔊 U R the King
15:13 This has to be the best scope measurement I have ever seen.
I like how you made sensing wires using inductance. Good technique.
I think they were actually copper, not henrys.
I didn't understand half of this one but it's relaxing to watch before going to sleep. Also, nice camera flex with the high frame rate.
Great video. Would be nice to see how you'd improve the output ripple. Like replacing or adding more capacitors or an additional filter stage.
He did it before, partially.
These videos are priceless. Thank you !!
Nice video. Best from Poland
Awesome explained!
Dan, you are a great professor....and by the way these such a eussian oscilloscope is wonderfull...
Beautiful video.
Amazing!!! Makes me wanna use oscilloscope more!
Slow motion shots are nice :)
Excellent video! Thanks a lot. 👍
thanks DGW, another awesome video and very interesting!! 😊🔋🔌💡🔦💻 ⌨️
Hi Danik, we've seen that you've got less material to show, so I second the opinion that some theory, like snubber networks, would be great.
You have a good command of electronics, so I trust you'd make an excellent example with actual parts.
Good luck with your channel!
Many smaller supplies have only one diode in this configuration. The diode conducts only right after the transistor turns off. This current is monitored and is used for short circuit protection. If there is a short, the switching transistor only sees the current feeding the inductor, then higher current on the diode due to the lower output voltage is sensed when the transistor is off and the duty cycle reduced to a safe level. Many people starting to service switch mode power supplies realize that most conduct the output diode when the switching transistor is off. This is for protection from short circuits.
You're The Best SMPS teacher I've ever had. You make me look on this topic from other perspective. Thank You! Have You seen prices of server power supplies? They can be bought from 100Kć and they seem to be not dodgy at all! And they also seem quite complicated. Maybe some video in future? Now Im modding one made by dell to use it to power hydraulic car lift :)
Fantastic Video! Thank you.
Dan- Hello from England, great video as always! You’re easily one of my favourite RUclipsrs, you have a unique way of communicating with your audience, and you have a real talent of passing on your highly impressive skills that instantly hooks the viewer.
I hope you don’t mind me asking - Is your day job electronics related? I’m also curious about that wonderful Soviet scope. Do you know its vintage, what its bandwidth is, and.... would you ever consider doing a bit of a teardown on it? I can’t be the only one who would love to see this, Soviet era electronics is so fascinating. Thanks for the great videos, please never stop! - Dave
Great video 😲😲
Great video
Very informative. Thanks alot
Top show!.
Extatic videos
Awesome arts
Fantastic
Thank you very much , very good
Awesome.
So, lets take a look at it....and my cat of course...
Super genius!!!!!!
Try to measure output voltage overshots by connecting tip and ground of your scop together and put it on negative of output voltage, you can see the spikes on any place of negative with this method!!!
Woow the aliasing slow motion is perfect! Slow motion without slowmotion camera - You are genius!
nice oscilloscope
Great
Nice
That fake slowmo footage was really good, could you have achieved a similar (maybe worse) effect, but easier by setting the trigger holdoff to something a little over 10ms, so you sample different parts of the 100hz variation in each successive capture?
Please what is the type of that pocket oscilloscope? Thanks
Excellent 👌👌 Review .
I always wating for your new video.
Sir how to test its gate driving waveform in oscilloscope.
Plese answer it
Great video. Is is possible to try and see simultaneous wave-forms for voltage across the switch and current flowing through it? That could give some visual estimate of power losses.
Diodegonewild
Please make video on class AB amplifier
2:00 It's a full turn on a half of the magnetic flux!
15:23 This is epic!
thaditts nyyyyyce
I'm also interested in Soviet portable scope C1-118A analog oscilloscope!
Can you make a video about on calculating the transformer
Would it be possible to quench the ripple with multi layer ceramic capacitors?
awesome! please make a VTTC and poke it with probes and explain waveforms ?!?!? thx
You should make a video about the power adapter from the pirl charger video...
I wonder how difficult it would be to get such a PSU to output constant current mode for short pulses at higher current.
is it not damage checking gate signal bipolar transistor used mini dso, on high voltage??
I just disconnected the earth wire on my scope #yolo
Of course for measuring two transistors at the same time I still need a differential probe, but I actually use a small transformer.
"Mom can I get a new heatsink for my lamp?" -me
"No, we have heatsinks at home!" -mum
Heatsinks at home: 0:20 top left
😁😁
Great, you are the best. I have 42v, 600w SMPS. Two current sensing resistors 0R18 damaged. What can it be?
Hi I have poor understanding for switching power supply , can someone explain to me where to get the control circuit to drive the mosfet on and off ?
Very interesanto
Regarding the high frequency ringing noise on the output signal, could that be ground bounce? What happens when you connect the probe tip to the same ground used to make the measurements shown? I bet you still have the ringing. Remove the long ground clip lead and probe clip, wrap a piece of wire around the probe tip ground to form a short ground lead. More than likely the amplitude will be much less with same low frequency ripple amplitude.
Generally the ground loops introduce noise, but in this case it seems to me that it is due to the filter coil being saturated, the diameter of the wire seems too small for the current involved, and also as regards the poor quality electrolytic capacitors to remove those high frequency rings and improve the ESR, it is better to put ceramic capacitors of a few hundred pf at the ends of each capacitor. It would be better to redesign the printout with a double-sided design, precisely to obtain a clean and low-noise output voltage. But all these design subtleties, for such a low-priced power supply, I don't think the manufacturer has ever thought about it. However my most sincere congratulations to Diode, exhaustive and detailed exposition as always!
this thing with better output filtration would make for a great secondary power supply to upgrade computers with high power gpus.
could you plz show us how to remove or decrease 25mhz overshot spikes ? Actually in most PC power supply is 2 switch forward and 80% of them have this spikes which is not good for mainboard healthy. REGARDS
A lot are half bridge actually. A snubber on the output diodes and an additional output inductor would help
@@simontay4851 I think the EMI could be high.
Damn, that fake-slow-mo was awesome. That combination definitely beats a digital scope on its own for stuff like this! It shows how the duty cycle slowly increases as the capacitors discharge and then quickly goes back down at the peak of the AC input.
How else can you even show the varying speed of the duty cycle changes in an intuitive way? Do any digital scopes come with a slow-mo replay mode?
My rtb2004 is not particularly fast (maybe in a keysight scope you can see it clearly), but in the history mode you can replay your captures at different speeds, so I'm pretty sure you can do something similar.
If you don't have that option I guess you can set the trigger holdoff to a little more than the 100hz of the variation to get a slowly moving waveform, you essentially sample a different part of the 100hz cycle in every trigger.
Another alternative is to trigger on different levels of the input capacitor voltage, by moving the trigger level you can see the changes in the waveform.
@@Gengh13 Mx Hantek DSO4072c has so little sample memory (only 40K) that there is no chance of recording anywhere near enough points to do any kind of slow-mo. Yeah maybe you could do it with tons of memory.
Trigger holdoff might be an option, but you're still limited to the refresh rate of your scope and it's gonna be just as fiddly to set up as on the analog scope.
Just triggering on the filter capacitors doesnt give you the time aspect of it though. You could look at all the waveforms in the cycle, but wont get an idea of how fast they change into each other.
Of course you cant do any of this with just an analog scope either. You need a half-decent camera for it as well.
Will you make vttc series?
paauwersuplaaaaaay hahahaha HILARIOUS
they call it no-easy!!
Why there is no Microwave Oven powered by Smps high voltage efficiently ??
Is the transformer an 220V changer or 24V changer to 12V??
Why dont you float your 2 channel scope? Basically i have an extension cord and i removed the ground contacts on a few sockets and i plug my scope in those when measuring mains stuff. On my scope its very unsafe because the scope body is mostly metal, but with your scope its pretty safe to do this (mostly plastic).
Can you please tell the model of your scope I want to buy one.
Same here. I liked the scope. Would love to know make and model.
If someone adjusts the output voltage from like 12.5v to 14.4v could that make it die faster?
Whenever you get your осциллоскоп out... I get sidetracked from what you're talking about because I'm trying to read the Cyrillic. I have to keep rewinding! ;)
haha, same, не совсем, but still
I love the little ‘Sdyelano v SSSR’ badge! I taught myself to read the Cyrillic script (which I absolutely love) when I was about 12 years old, and that’s 42 years ago, so I hope that’s right, lol! I’m a bit rusty now. I don’t understand Russian, though. I’m guessing it means ‘Made in USSR’?
Я только немного понимаю.
@@edgeeffect - I understand almost nothing except hello, thank you, etc. lol! I really wanted to learn as a kid, but there wasn't enough interest at my school. I would probably have struggled anyway, I couldn't even get to grips with German!
Thank you, great video.
Have you got a new oscilloscope?
I think you had a c1-118 without A (to 10 MHz). A have this one with A too, but i dont know, what does the button on the right of button Y1 (it is something with arrows).
Have you got it with classic GND pin on the plug, because i haven't?
Thank you very much for the answer.
I have both C1-118 and C1-118A. The button switches the modes of the 2-channel operation between chop and alternate. Chop switches very quickly between the channels (sometimes you can notice that the lines are made of tiny dots). Alternate mode alternates between the two traces. It draws one trace, then the other one, and so on. Alternate is better for most cases as it creates less artifacts. Chop is good to show low frequency waveforms because alternate halves the refresh rate and so it flickers more when measuring low frequencies. My oscilloscopes have a grounded mains plug, universal european one.
Thank you very much.
The last question is, what plug (jumps winding of the transformer) you have behind the ,,door" at the bottom. It is where is connected the feeding (power) cable.
(Omlouvám se předem za lámanou angličtinu. Důvod proč bych chtěl vědět jakou máte propojku vinutí je ten, že bych chtěl osciloskop připojit na vinutí na 240 V, dle návodu by to mělo být možné, ale nemám originální propojku ani vinutí nejsou popsána.)
Thank you.