Tips on Repairing SMPS power supplies without published schematics. Learn about the half bridge configuration. My Electronics Course on Patreon, Link Here: / mrcarlsonslab
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@MrCarlsonsLab5 жыл бұрын
To learn more about electronics in a different and very effective way, and at the same time support this channel, go to Mr Carlson's Patreon page, click here: www.patreon.com/MrCarlsonsLab
@brianbrinckjensen5 жыл бұрын
hi, i like the switch mode powersupply videos, i was wondering if you could do a series, form the crappyest basic of a usb charger to adding protection, current reg, and other stuff.
@sivakumarrsave53924 жыл бұрын
Can you tell me how will check electronic components
@kothapallivinodkumar78014 жыл бұрын
Hi sir , can I know why the output voltage of the the SMPS Is high, it is not desired value. Example if desired value is 35 V , but it is coming 60V , what is problem in these SMPS
@hooblydoobly91253 жыл бұрын
Urmim
@jayay59433 жыл бұрын
When you say “really bad things will happen”, excuse my ignorance but what exactly happens?
@shahfx12353 жыл бұрын
You know hes a pro when you see him sitting inside a 70's lunar lander!
@janicehopkins44322 жыл бұрын
No doubt!
@Hereford982 жыл бұрын
I know my mechanic is a pro cause his desk is surrounded by car parts. 🚗 😀
@georgoroth Жыл бұрын
Best comment ever!!!!
@andreyMishov Жыл бұрын
1. Этот модуль действующий. 2. Этот модуль движется. 3. Автор управляет этим модулем. 4. Гравитация подозрительно мала. 5. Скафандр почти не мешает записывать это видео 6. Название видео: "Монтаж smd компонентов в работающем оборудовании движущегося лунного модуля в открытом космосе паяльником Tesla, работающим на батарее Tesla, любезно предоставленном нам корпорацией Tesla. 7. Луна на самом деле не жёлтая, а красная. И летел этот модуль 300 дней. Наверное, это очень медленный модуль. 8. Борода делает ваш Скафандр теплее и уютнее.
@Robert-hr6sh Жыл бұрын
My lunar lander did not take off.....Commonly called a divorce, as I lost my electronics shop in 2007 Well now it's 2022, and as iam single and starting over (in electronics that is) 👍 I know, sad.
@jadesystem Жыл бұрын
Never seen anything like it. His first observation is the visual inspection with emphasis on build quality and quality components. Then the design engineering layout of the board. How he can identify immediately each subsystem and it's component and it's function. Then drawing the circuit and explaining the fundamentals from his intellectual mindset He was born to be a great teacher in electronics/electronic technology. Very few can explain or repair down to the component level. Keep up the great work !!
@michaelsnyder7442 Жыл бұрын
It's called experience.
@TheRadioShop7 жыл бұрын
"If it does not work we will make it work" I love the confidence you show on problems. This was a very education video Paul. I always learn things from you. Like PLL circuits SMPS is another one of my weaknesses. Your hands on teaching method really helps. Thanks for another great video. Buddy
@MrCarlsonsLab7 жыл бұрын
Thanks Buddy!
@billybonewhacker7 жыл бұрын
The Radio Shop you too huh. it took awhile for me to get my head around phase lock loops. but now i just picture a dog chasing its tail. lol ...theres a guy in the Philippines who offers a course on smps circuits. but from what ive seen mr c does a better job of explaining them. peace from Oklahoma city.
@vfstung16 жыл бұрын
The Radio Shop aww
@roseelectronics45824 жыл бұрын
@@billybonewhacker who's that guy. Can you give me a link to his website?
@u4lukfresh8293 жыл бұрын
@@billybonewhacker m
@traculabeats90696 жыл бұрын
I really appreciate the orderliness of your explanations. Very clear and precise and organized, just like electronics.
@rostlaur6 жыл бұрын
Mr Carlson you are a reference of the very best on KZfaq. I expanded all the collapsed fields and saved to PDF to get a pure jewel of your comments/observations and those from all the viewers that also wrote brilliant and important comments/observations. It is a 73 pages PDF that I will read again and again for years to come.
@stavinaircaeruleum22755 жыл бұрын
How'd you do that?
@keithking19855 жыл бұрын
You said it man.
@rayofcreation39965 жыл бұрын
Robert St-Lauent how did you do that? I mean the PDF files.
@dclayville5 жыл бұрын
I find electronics boring but what I do like is old technology. Watched one of Mr Carlson's videos and was impressed with his knowledge. So I watched another and another. Now I'm hooked. Nothing more satisfying then to watch someone who is extremely knowledgeable and good at what they do. His confidence that he'll fix whatever the problem is very impressive.
@ao25285 жыл бұрын
I can't say enough how well you are to explain complicated electronic devices with your easy to understand language and perfection, learning new things every times by watching about what was my specialty when I was younger.
@thepricillove52443 жыл бұрын
I swear I watch this Canadian equally for his understated enthusiasm and much for his obvious PhD. Chops. Carry On Sir.
@MultiJennifer54 Жыл бұрын
WOW, I'm just learning on my own from KZfaq and books, on this sight with the explications you provide I can deal in my mind what to do and what not to do, in troubleshooting but I know I must be very careful to take my time a listen ,observe, and be patient, thank you young man for a better day in my life with your teachings. miguel
@AJMjazz6 жыл бұрын
Well done, Paul! Great explanations. In the most simplest of terms, It could be stated the SMPS is the modern and sophisticated version of the old vibrators that supplied HV to auto radios in the 40's & 50's. Keep up the great work.
@Guitartime16 жыл бұрын
GREAT job. At the plant, we used to just toss them. I have been a tech for 40 years now, 28 of them sitting on a bench repairing 2-way radios. Again, you are great at explaining and appreciate your videos.
@gordonemery6949Ай бұрын
I must have missed this one ,just watched it and what a brilliant explanation,im quite new at this and if you cant understand something you tend to put it to one side watching this has put my brain into 2nd gear, regards from across the pond 👍🇬🇧
@kchoudri4 жыл бұрын
oh WOW.... what a lab... 11 seconds in and I had to pause the video to fathom in the amount of devices you have skilled over the time with your profession.
7 жыл бұрын
4:55 "If it doesn`t operate, we will make it operate, not a big deal" :)
@FarWesternGarrison4 жыл бұрын
when I scrolled down and read your comment it was right when he said it.
@simonilett9984 жыл бұрын
And if we cant fix it, we'll just get a bigger hammer....lol
@mirkomueller34127 жыл бұрын
Jesus - I so much love your Lessons - done not only with profound knowledge but calmly and comprehensive as well. Still (in terms of amount of Subscribers) very underrated channel.
@geoffjohnson73835 жыл бұрын
Awesome job on the basics of switch mode power supply operation! Just now came across all of your videos and thanks for taking the time to make them. I've been doing electronics repair my whole life and still learn something new every day.
@CHIBA280CRV6 жыл бұрын
You have the coolest lab on KZfaq as well as explanations.. thanks
@spelunkerd7 жыл бұрын
I'm hoping to see more repair videos. Gotta love your confidence you can identify and fix the issue -- power supplies always seem to die an early death.
@ele48537 жыл бұрын
Great job! You are a great teacher. Well organized, great communication skills, knowledgeable and clear. Focused on the subject and to the point. It's always a pleasure to watch your videos. Congratulations!
@crocellian29727 жыл бұрын
Outstanding example of a teaching video. Including the safety issues in a very direct way is particularly helpful. Thank you.
@MaxKoschuh7 жыл бұрын
excellent video. you are a real pro. Happy to see that your number of Patreons is growing. You really deserve it!
@MrCarlsonsLab7 жыл бұрын
Thanks Max!
@mrfoodarama7 жыл бұрын
Your videos are incredible. The information you present and the quality of the videos is really second to none. Excellent stuff!
@MrCarlsonsLab7 жыл бұрын
Thanks for your kind words!
@aftabak75995 жыл бұрын
Many thanks for your excellent tutorial. I was a TV technician 50 years ago, repairing tvs to component level. Then I moved up to Avionics tech job and later on to an aircraft engineer's job. I retired after 40 years without board level repairs. After retirement I find a pensioner's life extremely hard. I am refreshing my electronics knowledge to be able to repair TVs or Computers.Please keep up the good work. aftab ahmed. London
@Scorpio7223 жыл бұрын
Enjoying your well done videos and projects, thank you for the excellent quality, theory, testing, and techniques. There are a handful of providers doing this and you are one of those in the "Top Ten" in the world from my view.
@learnandteach.1083 жыл бұрын
A piece of Gem. This is called the teaching madness. No words, just request to keep up the great work 👍 Edit: jem to Gem
@seckinseckin39194 жыл бұрын
Actually this is the best educational SMPS video for me. I have watched lots of them, they just talk and reading descriptions which you can find in datasheets or some papers easily. They dont describe every part of circuit just keep goin" this is the SPMS and it turns voltage yada yada yada...."
@thomasherrick90207 жыл бұрын
I have watched quite a few of your videos and I have learned alot from them. Even watched some that are over my head and still have learned from them. Thanks. I will continue watching.
@jwl92867 жыл бұрын
Another great video. The isolation transformer discussion was super enlightening. Recently I used an oscilloscope on a 1956 Admiral phono push pull amp that uses a power transformer. Figured I didn't need isolation. With the scope connection to the speaker (backwards) it created a hum. Even with the power switch off. I located a capacitor between the line and chassis ground caused it when the non polarized plug is inserted in reverse. Looks like isolation is good no matter what type of equipment is being tested. Thanks again.
@grantfielder6 жыл бұрын
Just went by patreon, and started your talkthroughs series there. Awesome stuff, thanks for the content. :)
@jackboneal6066 жыл бұрын
well done and geared to someone like me with fair understanding needing refresher but have not toyed with some of this stuff in more than 15 years like they say """" if u don't use it u loose it """ am now at point in life i am hobbing in HHO GEN., power plant pulse and stabilizing power output from unstable supple v.. this gives me things 2 think on with other life experiences. ie: associate degree in computers & electronic, ham operator , service mechanic, hvacr tech, plumber , service tech n butcher in 3 packing houses, boiler tech . and "JACK OF ALL TRADES "BUT u no the rest. TY VERY GOOD
@kwhp15074 жыл бұрын
Hands down top 3 best SMPS educational video on KZfaq.
@xxkillerxcamarox4 жыл бұрын
THANK you for taking all that time to make this video. im the type that has to learn something every night before bed and im new to circuitry so this is amazing. keep up the great work
@TheLawrenceWade4 жыл бұрын
You're a really great teacher. Wish you'd been around Carleton University when I took Electrical Engineering there. :) I got my first oscilloscope when I was a kid. It was a World War II era Triumph I found at a garage sale, and I used it to repair the 1950s-1980s TV sets I would get at the curb. Being that the Triumph had only a two prong plug, it wasn't grounded, and I used to connect the stupid thing with reckless abandon everywhere in a TV chassis. What's the damper tube signal look like in a 1971 Admiral 21" delta-gun color TV? Let's find out! Looking back and realizing that the whole chassis and body of that oscilloscope was now live with B+ Boost, I cannot believe I didn't fry myself. But, in my defense, I did realize even as a child that electricity was to be highly respected, always used the one-hand-only rule, and never touched the two units at once. I learned the hard way about oscilloscope commons when I got a 1970s-era Phillips scope - which had a third prong. I connected the ground lead, turned on the set I was working on, there was a loud hum, and instantly the lights went out in my bedroom. It took a while to get the smell of burnt scope probe wire out of my bedroom. Thankfully, no other damage was done. In the early 1980s, lots of houses in Ottawa were having their furnaces converted to natural gas. Family friends gave me an oil furnace ignition transformer, with no idea how crazy-dangerous that thing was in a ten-year-old's hands. In fact, they didn't know what it was, they thought it was a motor - which itself would have been dangerous enough. When I made a little arc with it and heard the power of it, I unplugged it, and it became a toy to be operated only in the back yard with the distance of the lawn mower's extension cord between me and it. That was my own instinct, not every child is going to have that respect. I think I've had about three unintentional electric shocks in my life, amazingly nothing serious. One of them helpfully made my first car run better when it told me that my spark plug leads were shot. Most people aren't so lucky. Parents need to be alert to their kids working on electronics, whether they're TV sets or microwave ovens or guitar amplifiers or switching power supplies. Brushing against the horizontal output tube's anode cap on that old Admiral could have killed me instantly. I was afraid of electricity - still am, as much as I love it - and that has kept me safe. By all means, don't stifle the kid's interest in electricity. Remember that electricity is billions of times stronger than gravity and the fundamental force of nature that is right now keeping you from falling to the center of the Earth.
@juancarlosquintana21113 жыл бұрын
I will tell you my story....when I was 7 years old, the TV technicians that came to fix my old Phillips TV used to test the high voltage tube with a screwdriver producing an arc that for me was magical...I remember the TV tube failures because I keep asking questions that I think we're probably would not understand at that time. Once I was by myself trying to emulate what those techs used to do. My knoledge at that time was too litlle. I thought that the conector that is plugged to the tube probably was faulty and when I unplugged there was a gas inside the tube and was scaping due to the fact that I just unplugged. Well I put my finger on the hole so the "gas" should be stopped. Thank god the 120 volts was not connected. I received the 12000 volts discharge ....I couldn't move my arm, I was totally paralized by 30 seconds. I really thought that was the end. ... Conclution...if you happen to have a kid with curiosity about electronics teach him/her the danger things about it....today I am a happy electrical engineer that loves to mess with anything...I don't hate old tvs...as a matter of fact I admire the tube designers.... Mr. Carlson love your videos...keep doing them.....regards....
@PaintmanJohn4 жыл бұрын
The ONLY caution I would add to your Video is to NOT handle a Power Supply without FIRST discharging the CAPACITORS . ALWAYS assume they are charged. That was what we learned in the Navy... Just my $.02.
@ashystyle4 жыл бұрын
@MyName Here That's your asumption. If there is a couple of ampere through 24V it will kill you.
@downsouthpov45824 жыл бұрын
@MyName Here What about to main filter caps on the input? They can be charged up to like 350v.
@tfstreamfj19914 жыл бұрын
he said a good practice... only if you get it positively...
@TheHarpanOnly3 жыл бұрын
Mr Paul just forgot to warn it. He is always warn it.
@robh19083 жыл бұрын
I learned that on my second TV repair.
@JustSmartIT7 жыл бұрын
Good job for making this video. There are few people videos about SMPS, and most of them they are not explaining so good. Keep up the good work ! Thank you !
@s3raphine897 жыл бұрын
I really enjoy the way you approach all of your repairs for us common folk not in" the know" can still grasp the fundamentals being applied in actual applications. Thank you for spending what I'm sure is very valuable time to put this together. Have you ever worked on high frequency Inverter GTAW (TIG) Welders? Would you ever be interested in showing how one is repaired if so.
@donjude95856 жыл бұрын
Looks like I have a lot to learn. Great video, I stayed with the video even though it was beyond my base knowledge.
@koffibanan30997 жыл бұрын
What a fantastic explanation! Thanks a bunch!
@billmoran38127 жыл бұрын
I'm liking the new format with Patreon Your tips on what NOT to do are invaluable.
@ethran Жыл бұрын
Your videos are always so helpful, thoughtful, and thorough! Thank you so much Mr Carlson!
@JoeKyser7 жыл бұрын
I keep watching your videos. Now i could actually follow this video. From what i learned so far from you and what i knew, this video served another great lesson. I'm pretty glad I found you. Your a teacher I can follow and learn from. I will headed to Patreon and support you. Its only right. I gain so much from your videos.
@MrCarlsonsLab7 жыл бұрын
Thanks Joe!
@manny35493 жыл бұрын
wow! Genius in electronics, genius presenter, genius teacher! keep it up!
@61spindrift2 жыл бұрын
I wish I had never found your channel. I find myself watching your video's to all hours of the night and falling asleep in my computer chair. Although I originally came here to see if I could troubleshoot myself why my PC's corsair digital SMPS (AX1500I) at times goes into an infinite reboot, unless I turn off PS for some time (assuming discharging caps) and then restarting. I find myself watching being mesmerized by your knowledge. Sure wish I never dropped out of EE classes 41 years ago.
@MrDoneboy3 жыл бұрын
Once again, thank you Paul, for explaining electronics, in such an easy to understand way!
@MrCarlsonsLab3 жыл бұрын
My pleasure!
@sumner4075 жыл бұрын
Good job ! I have a better understanding of a switching PS now. Thanks for the video.
@bundylovess7 жыл бұрын
big thumbs up mr Carlson
@user-lh8rb5wx6q5 жыл бұрын
Just very well done and absolutely great to have people share knowledge like this. There is life on the internet. Thank You, I am with joy going through your videos. Great job. / Patrik, Sweden
@Elecifun7 жыл бұрын
Another great video, helping me a little further forward with understanding how the SMPS works. Also a little closer to fixing my own SMPS without blowing me, my scope or it up! Thanks Mr Carlson.
@laohantun74045 жыл бұрын
Thank you bro....thank you for teaching us....bless your heart.
@goodwill8296 жыл бұрын
just say brother, thank you for your kindness to share and teach us.Yesus love you
@MrCarlsonsLab6 жыл бұрын
Your're Welcome!
@randydicotti39753 жыл бұрын
I came here....4 years later......to repair a similar Power Supply. Mission accomplished thanks to this video!
@Bully0000017 жыл бұрын
Probably the best explanation I've seen on youtube of what the transistors are doing within a circuit. I feel my understanding has made a quantum leap forward. Many thanks and certainly justifies my joining your patreon course.
@MrCarlsonsLab7 жыл бұрын
Glad you enjoyed!
@evergriven74025 жыл бұрын
I know so many have said it already but I have to say it again Thank you for all your fantastic informative videos .. Please keep em coming..
@trackingstationneillindsay5 жыл бұрын
Thanks Mr. Carlson for your gift of knowledge. How can anybody give this gentleman a thumbs down. When I was young, I had to ride my bike for miles to the public library (L.A.,CA.) and take notes after doing an extensive search for the correct information so I could use it in my guitar amp designs. I know that sounds like a joke but I'm serious. Learn what you can!!!
@davidharper42897 жыл бұрын
Hi Paul, Thank you so much for sharing. ...I have to say, that I find, the videos you make are more than excellent. Your tutorials, presented with your obvious and observable depth of knowledge, and delivered in such a calm and measured manner, makes watching them highly educational and thoroughly enjoyable. Thanks again.
@MrCarlsonsLab7 жыл бұрын
Hey, glad you're enjoying David!
@ronmcclintic60862 жыл бұрын
A great way to teach. Love your collection of vintage and leading edge equipment. You are a great Teacher Thanks much - RMc
@benadams63327 жыл бұрын
I often find it useful to just inject low voltage DC from a bench supply, instead of running full mains AC, while diagnosing a SMPS. That way you can safely check the switching and probe around as much as you like without having to be really careful.
@Zonkotron6 жыл бұрын
That works ? Would have assumed that some sort of brownout protection would kick in !
@chebhou5 жыл бұрын
That's what I'm trying to do,and as you said the brownout will kick in but you'll see some pulses before that, otherwise you can deactivated the protection since some ICs have a pin for that, or you can try injecting all the outputs not just the standby 5v.
@KarlsLabReport4 жыл бұрын
Great tip - thanks!!
@jamespaterson75977 жыл бұрын
good stuff thank you mr carlson
@stevesm20107 жыл бұрын
Best explanation of switch mode power supplies I've heard - Thanks!
@tonywalker82503 жыл бұрын
Brilliant explanation once again. I really struck gold when i dropped onto your channel. Thankyou
@peterduxbury9275 жыл бұрын
As soon as I opened this video, the Electronic Equipment all around the Teacher was almost reminiscent of the Flight Deck of a 747.
@derwissenskiosk80417 жыл бұрын
Really good like everytime thanks Paul /Paul from Germany :D
@MrCarlsonsLab7 жыл бұрын
Thanks Paul!
@williamgassner22967 жыл бұрын
Der Wissenskiosk by fix cAr fix car go to KZfaq Craigslist
@smjones42385 жыл бұрын
My boss didn't like me to fix things like power supplies, "it's a waste of money". I did anyway, bought Solas for most new projects, never had to fix one, they are bricks. Excellent video, as usual. Kudos, and thank you.
@teresawatson89363 жыл бұрын
Ten thumbs up! Excellent tutorial for working on 'hot chassis' circuits, which most modern consumer products are today. Floating grounds are the most commonly overlooked detail by techs today. (Afterall, who religiously uses, ever seen or even owns isolation transformers anymore? Those dissappeared with all the TV repair shops long ago) If that power cord isn't a 3-prong or is missing the ground pin ... big red flag, it's probably a hot-chassis design that can kill whenever the cover(s) are removed. A quick check with a battery-powered meter for AC voltage between the wall plug ground and the stuff you're working, can make all the difference.
@twobob4 жыл бұрын
21:35 "And you might even destroy yourself" Classic. I have been earthed. Sent to ground. The final fuse has gone away, it gives and gives, we could go all day ;)
@bornfe51277 жыл бұрын
I'm heading to patreon
@chrisnorton12454 жыл бұрын
A very informative video sir. I am so glad that you stress the safety side of working on SMPSs and the use of isolation transformers. If you're lucky, the blue flash and the bang just gets your attention. If you're not lucky..........................
@KuroAyase7 жыл бұрын
Awesome video. Simple and going slowly through whole build. The only thing that I would change is that when you are measuring, the camera could stay on the circuit and the some smaller screen on the measuring equipment or vice versa. (I did not have chance to watch rest of your videos when maybe you applied it already but for this video this is what I would love to see). I was looking long for just this simple step by step description on how the PSU is working. Thank you very much! It is now much more enjoyable to learn this stuff.
@mrpedrodrodriguezsr76285 жыл бұрын
Will you believe I have never seen a switching power supply without a optic coupler in all my working years ? Even retired I'm still learning ! :)
@mikefreedom56124 жыл бұрын
Thank you, can you make a short video how to connect the oscilloscope, because in that video you just explained without showing how and thanks again
@alexjaeger50667 жыл бұрын
This channel is one of the few remaining bastions of quality hardcore electronics content on youtube. Keep up the great work!
@MrCarlsonsLab7 жыл бұрын
Thanks Alex...and it will remain that way :^)
@jeroldlawrence51864 жыл бұрын
Me again, Love what you do been doing. working my way through your videos. Learning, Learning, learning. Want to join your patron group but every dollar is tight right now. Please know that what your doing is appreciated !!! :)
@eatshitgoogle6 жыл бұрын
That’s a curious warning about probing a live circuit without an isolating transformer. I just watched ElectroBOOM probe his industrial grade light sensor that was being powered directly from the mains and nothing went wrong whatsoever. 😇
@skycarl7 жыл бұрын
I think it might be fun to power and old tubed car radio with one of these. Paul I know you would be able to dial that in. ;)
@MrCarlsonsLab7 жыл бұрын
Oh I'm sure...all over the band.
@ernieschatz37836 жыл бұрын
LOL!
@luccaaprille5 жыл бұрын
Amazing class about SMPS. Thank Paul for share your knowledge with us! Take my thumb up!
@pkplexing7 жыл бұрын
Awesome video. I like pausing when you show circuit diagrams and trying to figure out how it works, and then hearing your explanation afterwards. I will be checking out your Patreon courses, cheers.
@MrCarlsonsLab7 жыл бұрын
Glad you enjoyed!
@faithfulnavigatorraul80484 жыл бұрын
I would like to see from you one day teaching how to use an oscilloscope
@jamiestarr10224 жыл бұрын
I agree. I am especially interested, as a hobbyist with no formal training, on where you actually connect the probes when troubleshooting various components. Can you actually troubleshoot transistors with an oscilloscope? Where would you hook the probes?? Thanks
@Sluggo014 жыл бұрын
R Copo...... o-scopes are easy, its the spectrum /logic /network analyzers that’s tough, like looking at noise floors at -130db or beta gain of a transistor, when measuring the curve gets upsidown....yea buddy...and using the sig gens properly, its fun stuff....all good
@mastercodein64864 жыл бұрын
++ for this request
@W1RMD4 жыл бұрын
W2AEW's "#232 More circuit fun transistor curve tracer using Stairstep generator circuit" is a really good video to help understand scopes.
@TheHarpanOnly3 жыл бұрын
@@W1RMD i think its little bit advanced. Btw, I liked that video too.
@robertsimms58613 жыл бұрын
18:54 Great advice on how NOT to hook-up your Scope's common lead to an isolated PSU circuit.
@llsdigitek7 жыл бұрын
Fantastic Paul, I learned something today on how they work! Thanks!!
@edgar9651 Жыл бұрын
Thanks. You just saved my oscilloscope - I am sure sooner or later I would have made one of those mistakes.
@noelnestor31597 жыл бұрын
Great video Paul, i like the inclusion of the oscilloscope. I recently got my first scope but not brave enough to use it fully yet, forgive the newbe question but could or should i use the scope on the same isolation transformer as the device under test? my area of concern is being tied to ground and frying something?
@lampmanpaul74597 жыл бұрын
Noel Nestor - yea that is exactly what I was wondering. Would one require a second isolation transformer to float the scope? Although the scope manufacturers won't agree with that ...I would be grateful for advice on this as well. Love all the videos Paul.
@noelnestor31597 жыл бұрын
Just for clarification i am using a rigol 1054z, so i think my options are using differential probes but thats expensive, using a maths function or running directly from a battery pack, i have tryed a 48v battery and it works but alot of hassle charging batteries
@brittneypaul20897 жыл бұрын
You isolate the circuit under test. Besides frying the scope you can fry yourself if you do not use an isolation transformer. With an isolation transformer in place: if you accidentally contact the "hot" wire, you will pull it to ground. However, if you contact both the "hot" and "neutral" wires at the same time, you are setting up a short circuit. -By putting your scope on the isolation transformer, with the circuit under test, you lose protection for the scope.- The ground on the scope will possibly be floating, unless you tie it to neutral. -- I was originally going to say the short-circuit risk described above is still present, but I don't think it is common to tie neutral directly to ground in equipment: that happens at the breaker panel. The scope may need proper grounding for safety reasons (to make sure stray voltages are not induced onto the chassis).
@noelnestor31597 жыл бұрын
I suppose where I am getting stuck is by using an isolation transformer (as I do for the device under test), am I not just introducing a path to ground by probing with the ground clip? I'm learning at the minute and want to keep as safe environment as possible for me first of all and the scope also.
@brittneypaul20897 жыл бұрын
Noel Nestor You are introducing a path to ground, but the isolation transformer isolates the circuit under test from it's normal ground. That way, the rest of the circuit under test can "float" relative to ground. You still have to be careful due to the large voltages present.
@NCF87107 жыл бұрын
Switch Mode Power Supplies, AKA Voltage to Smoke Converters.
@electron73732 жыл бұрын
Nice attention to detail and observations of the functions SMPS
@jp-um2fr7 жыл бұрын
Hello Paul, thanks for you channel, it's very good. About 50 years ago I built a 20W + 20W Mullard amplifier with a great deal of help. I Googled it the other day, it came up with 'National Valve Museum' - Gawd that made me feel old. EL34's Ah. I won't go into details but I was lying underneath this beast when a wire dropped across my nose. It was 410V. I was holding the earthed chassis at the time. You are very wise to warn people. If I remember correctly I said "Golly Gosh", "Fancy That" and "**** the thing". Even though most of your projects are well out of my comfort zone I do enjoy watching a craftsman. So many 'presenters' on You Tube are - let's just say 'overpowering' . Wide open spaces surrounded by teeth springs to mind. You are a pleasure to listen to. I have taken up basic electronics as a hobby again. I'm in the throws of converting an old 120W Monacor line amp into a 40V - 6A power supply. It came from a pub, a pint of beer didn't do it any good. Most of the 'gubbins' are fine. I'm going to try the TIP35C's it has with an LM723 but I have 4 x 2N3055's on standby. I'm also fitting a 400W SMPS - variable A & V. I don't mind fan noise. All I have is a Fluke, old but serviceable. Your video on SMPS and Linear power supplies was very interesting. I made a Joule thief and a radio ham friend went absolutely apoplectic. I told him I was going to make a 100W one with a long aerial but wasn't quite sure where to attach it. He thought I was serious - OOPS! Thanks again for the videos they are very much appreciated.
@MrCarlsonsLab7 жыл бұрын
Thanks for taking the time to write JP, those are some great stories... I Enjoyed! Glad to read your getting back into electronics again.
@YouLCD7 жыл бұрын
only 2:43am, plenty of time for another video
@mdettling796 жыл бұрын
Deaf viewer here, would love to see subtitles to understand you better.
@MrCarlsonsLab6 жыл бұрын
Thank You for your input Michael!
@RestoreOldRadios7 жыл бұрын
Paul, another great/detailed video. Thanks again for sharing your knowledge and experience. Best, Don
@mostfafathy84907 жыл бұрын
as always very comprehensive and educating, now i only wish that Mr Carlson will make videos like this on other topologies also. Thank you for the effort.
@xanderguldie4 жыл бұрын
Every time I open one of your videos I think I accidentally put on a live feed of the ISS
@pepe66664 жыл бұрын
its so iconic. makes me happy
@BeetleJuice19807 жыл бұрын
amazing tutorial! please do a repair to a pc atx smps ! nobody has done that..
@MrCarlsonsLab7 жыл бұрын
Will Do!
@JoshKaufmanstuff6 жыл бұрын
Yes please!
@willrobbinson6 жыл бұрын
the repair would follow a similar line BUT a lot of failures in comp supplies are dud caps (bulging tops) main cause of failure followed by complete blowup of choppers (not worth fixing) but do check the caps also the same on mother broads. many thousands of machines scrapped because of a bunch of cheap caps dying.
@losesparkplug11906 жыл бұрын
Konstantinos Nano should make power supply with u mechanical motor running gears for diffrent voltages a pma generator with all the voltages at the right rpm but charged from solar or wind to capacitors runnning 3 phase permanet magnets simple to fix with hardly having to know so much.
@NivagSwerdna7 жыл бұрын
Great video. Particularly liked the explanations of pitfalls with adding a scope as part of the circuit. Quality explanations.
@RONWOLPA7 жыл бұрын
as usually deserved a huge thumbs up , thanks for posting your videos
@robh19087 жыл бұрын
I need to get buttons made up that read "You're doing so at your own risk".
@yannkitson1167 жыл бұрын
@UFOhunter: Not takes care of, but weeds out ;)
@mathewk29617 жыл бұрын
I call it a "Self Correcting Error". If "they" screw up with this i doubt they'll make that same error again. Hence, the error has been corrected.
@SkyWire883 жыл бұрын
A fuse "BLOWS". It doesn't "go away". Remember to speak in the language that makes sense to the masses.
@shawnerz984 жыл бұрын
I'm coming to your channel late, Mr. Carlson. I wish I had discovered you sooner. I have troubleshot a couple of SMPS's and got lucky. Most of the time, I toss them and order a new one. It is nice to see how to troubleshoot them. :) Thanks for posting. :)
@travtrav94183 жыл бұрын
Hes very nice to listen to . Ive literally never said that before . i have a hard time focusing on people when they talk or explain things but man every word has my attention
@pescoinfiore7 жыл бұрын
If you are following along, yo are doing so at your own risk !
@MrCarlsonsLab7 жыл бұрын
Just take care! :^)
@mike945604 жыл бұрын
Ok I ordered an isolation transformer.
@AN-kg4ei3 жыл бұрын
I know this is old but are you happy with the you manuf/model of isolation transformer? Did it require any additional internal bonding?
@mike945603 жыл бұрын
@@AN-kg4ei Quality import. So the transformer had the screws loose and one fell off. But easy fix. Works fine. Hard to mess up a switch, transformer, and outlet.
@vinceotten1293 жыл бұрын
Thanks! This is the first time I actually understood SMPS.
@davidv28337 жыл бұрын
Very good explanation, come more of these! Thank you , David, Portugal