Thank you, I am electronics engineer and this is just basic for me but you explained very well for beginners even though your first language is not English, there are many out there trying to teach and their first language is English but you would think they are speaking double waffle, you do this very well, thank you for your time, excellent!
i agree with you. a lot of people making the same content but it is hard to understand what they're doing, and talking more nonsense rather than to explain step by step directly the basic electornics and what the use of the transistor and how to amplify to be work in a different way. and yeah there are many out there trying to teach and their first language is English but they are speaking double waffle. and for me as a beginner in electronics it is more complicated to understand because my 1st langucage also is filipino and i'm not good in english thats why i can't understand what they are saying because of their pronunciation..😁😁😁😁 sorin is best.
I'm an old man now but I have always had an interest in electronics. Now that I am finding it harder to do more heavy work and have time to revisit my lifelong interest I feel very lucky to have tumbled upon your instructional posts. You have explained power supplies extremely well and in a manner that is simple for me thank you very much
Perfect! No one teach me how basic power supply work as good and clear as u did!.. Even u told us how each component did with the power one by one.. Briliant, You're The Man! Sorin!..
Sorin, you may have put this very informative video up 3 years ago but it most certainly has not lost any of its ability to convey a great understanding to we who are eager to understand the wonders of electronics... Thank you so much for sharing and making the mystery of electronics so clear and visible.
what a great straight forward explanation, so many things I already 'knew' from studies years ago are finally clear now with this small practical example with the transistors. the lack of jumpcutting also makes it very easy to follow and see what you're doing. looking forward to the future examples thanks as always for the great explanations.
Boring ???? what do you mean this is the best video ever, i watched the whole of it and i didn't even blink, this is an amazing work thanks alot for your effort. keep the good work #bestteacher
@@dimitarnikolov3527 don't compare anyone to Sorin, he treats electronics like a pet he can play with anything because of his experience and I believe we haven't seen all his skillset yet! I've seen guys litteraly give up on fixing motherboards even though they had schematics and very advanced labs ,look at Sorin no schematics nothing special except his power supply and multimeter still does magic , let's not forget the magic hot glue trick for hinges ....
I love how happy he sounds while saying that he's sunday, and then goes on working on electronics like every other day of the week haha! Thank you Sorin for sharing your knowledge with the internet!
This is perfect explanation to these people who said "current limit is equal to short protection and this is how it is done these days on a new power supplies (also current limit is more difficult to implement...". Well done Sorin!
Being a beginner, I came back to this video a few times to understand what is happening. It is pretty clear the more I watch! Thank you for explaining in detail what is going on
Finally, I can justify to my wife why I bought this oversized old audio amplifier and broke my back ! Thank you Sorin for your positive spirit and long live to your channel !
I would like to thank you Sorin for all your work. It's simple and to the point, it leaves viewers with a working project and ideas how it can be fixed or in this case build in different ways. What I mean is that you encourage people to experiment with what they have. And as you many times said "you work with what you have" that is what makes you creative. And as you repeat constantly "anyone can order a replacement part but that's not the point" Huge respect
I've wanted to buy a cheap Chinese lab power supply for a while now. Thanks to your inspiring video I can now use my previously acquired basic knowledge of electronics to build it completely for free with parts out of an old dead avr-amplifier I have laying around in my basement. Not only will it be better than anything I could have bought with my limited budget due to the audio amplifier's beefy transformer, but it will also be proof that I can implement all these things that I have been learning for the past 2 years (I have been taking basic electronics classes as an Informatics student). For it is only now that I have the feeling I can properly understand most of it. Thank you very much sir for the gift of knowledge!
What a very constructive video. You are like me. A passionnate man. Electronic is so passion for me. Very good explanation. Better than my teacher years ago. Thank's for doing this on weekend. Very kind of you. Thank you Sorin. You are a good hearted men.
Best explanation I have seen, I mean lots of guys do teardowns or draw on a whiteboard but to actually go and build the thing step by step in real time is so much better. How could you not understand after watching this and yes it is long but it is also important to not skip as you miss the reasoning behind why he is doing what he is doing.
Ive watched lots of electronic videos and being a beginner i have to say i am actually starting to learn by watching yours. Ive gone through your beginners videos and now on this. Keep doing what your doing mate. cheers
Thanks for doing this demonstration. By showing the process step by step, you have removed a lot of the mystery that surrounds power supply design. Looking around my junk box, I believe I have all the parts I need to replicate this experiment. Hope I don't blow anything up!
Wooow. Sorin, sir, that's the best video about DIY Lab power supply I seen on UA-cam or anywhere else. Clear, useful and.. powerful. Thank you very much for explaining everything so nice. :) What can you do more about this device? I'd like to see how to make a short circuit protection for example or feedback voltage compensation for stable output. :) But these are only sugestions, anything you create will be indescribably useful. :) Waiting for next parts! I'll build one simmilar to your and share my experience. Thanks!
Absolutely fantastic! You say you are not good at explaining but I understand now what is meant by a transistor turning fully on and how it’s a amplifier. I can see that your mind is already 3 or 4 steps in front of your actions. This is natural to you because of how long you have been doing it. Thank you so much.
Really liked your comment about the fact that if you get bothered by the fact that you don’t have a PCB to build on, it will put on break on your creativity. It’s so true. If you absolutely feel like you need a PCB, get a perforated, cheap one to build on with only solder pads. I’ve done it for certain compact builds. Anyway, thanks for the trip down memory lane!
Whoever is putting dislike is a very poor human being. Sorin is taking time on SUNDAY to explain you something he already knows for sure, FOR FREE, and instead of being thankful, you put dislikes? Really? Although I'm sure that he doesn't even care, it is still a very despicable act. The most pathetic part is that I'm sure that those 5 morons didn't even watch the video, because they are too dumb to even understand the basics. Anyway - Thank you Sorin and I wish you all the best to you and your family.
Dislikes are residual, thus concentrate on the likes and smile... Perfection is boring, as much as automatons can be compared to human beings, and as much as perfection doesn't actually exist if not only at a subatomic level - you wouldn't want to split Sorin apart into quarks and such he would make no sense anymore.. :-)
i was working on a laptop motherboard and my senior colleague said why don't i use datasheet. I told him my master didnt teach me how to use that. it worked thanks to my master. I don't care what some people say, you are human, liable to mistake but you are the best. With love from Nigeria
Felicitari! Pentru mine electronica este doar un hobby dar nu ma pot abtine sa nu ma uit. E foarte multa informatie utila, atat pentru un incepator cat si pentru un expert. Din videoclipurile tale am invatat foarte mult. Esti un profesor exceptional!
I didn’t understand how the current limit works by connecting the collector to the base of the other transistor. But I will watch it again so I can learn. That is the beauty of having this great teaching on video.
Sorin, at 1:18:28 you advise connecting the collector of the current limiting transistor to the voltage limiting pot (and also the base of the voltage limiting transistor). You call it shorting the base of one of the transistors to the emitter of the second stage transistor. In effect you are shorting the base and emitter of the two stage voltage regulating transistor pair. How will that pair then work as shorting base and emitter should render no voltage difference to drive the two stage any longer? Am I forgetting someting?
Excellent hands on tutorial - simply but clearly explained, very easily understood, and a very practical if basic power supply at the end - one of your best videos.
Thank you sorin , i really like the way you explain things. You were the first on on youtube that i could understand when it comes to electronics... thank you very much
FANTASTIC and so very understandable. The word you were looking for was sensitivity at one point then variable late in the video. I would really like for you to put the variable speed cooling fan based on temperature at the heat sink. THEN I would like to see you take that method and apply it to your new power supply so you can quiet that fan. Let me know what material you need for that and I'll buy it and have it delivered to you. In my opinion this was your best video yet! I've watched a BUNCH of them too!
You are a very good teacher. I learned a lot by the method you used. You kept adding components one at a time and explained the purpose. Thank you so much.
As a total beginner this video has really helped me understand how a power supply works and how to use transistors which was a mystery to me 😂 Thank you so much for this
I watch it all all 1hour 37 minutes and few secondes Some how you are a very good teacher i learn every time on your Chanel have a nice sunday greetings from Holland netherlands
A great video I am learning alot from you sir. Your video describes 3 years at college within a max of 2 hrs. Its my pleasure continue posting these great videos and the one for making a printed board too. Very much thanks
thank you for your time in doing this video you spent 1:37h and made a lot of people happy including me, your explanation is simple and understandable, thanh you so much.
Thank you for another great video! Your step by step method, discussing & diagramming each components role and effect on the circuit, is immensely helpful for us beginners!!
MR Sorine Diodegonewild is in fact the best electronics school on UA-cam ... I would like to see the continuation of the circuit with the addition of a short circuit protection relay, hug!
this video took me back to my electronics classes in highschool 20 years ago when I assembled a very similar linear power supply except for the current control.
Sorin.. it was an awesome way to soend time learning things in electronics on a rainy sunday.. . as you said the power supply doesn't have to be pretty to work.. all it needs to do is work for what you need it for..good work, looking forward to the next video.. cheers
Current limiter is the short circuit protection. Sorin showed how it works -- current sensing resistor signal amplified by transistor to pull down base voltage of main controlling transistor of the circuit (which is mounted on the radiator). Reference based on zener diode does prevents voltage drop. But you can not keep voltage drop when you have short circuit -- and current limiter prevents it from happening. Otherwise at short circuit we will have zero resistance of load and then current will be unlimited (in reality it is not possible as there is no transformer capable to provide unlimited current). If it would happen then on the transistor we would have produced infinite heat power. The dissipated power (any kind including heat in electrical circuit) calculated by next formula P=U*I -- with infinite current heat power will become infinite at square times. Sorin did not explained Ohm's law -- U=I*R, all three parameters of electrical circuit are dependent (related to each other). It is other form of second law of Newton -- 'nothing appears from nowhere and nothing disappear into nothing', law of constant energy in isolated (inclosed) system (the body in motion can not accelerate/decelerate without external force) en.wikipedia.org/wiki/Conservation_of_energy en.wikipedia.org/wiki/Second_law_of_thermodynamics You need to watch this video again and again until you will not understand how it works -- then your questions will not have any meaning for you, it will be obvious that this circuit perform functions which you asked for (although Sorin for simplicity did not taken into account some parameters -- as current flowing through zener diode slightly affects voltage drop on it, it can be easily corrected by placing zener diode in output circuit, how it used in precision power supplies). Well but otherwise Sorin gave reasonable explanation how to build regulated power supply with current limit which protects from short circuit (current can not go higher preset value).
That's a very good video thanks a lot I have a question however, in my country I failing to get BJTs so how can I go about it if I want to create a power supply using a mosfets?
Nice video, thank you for explaining. I hope you will find time to do a second part where you replace the 1ohm resistor with a lower one, maybe 0.1ohm, use an opamp and maybe some feedback from the output. And yes, design a board and build the damn power supply with a fan, LEDs and other cool stuff. You know people will try to replicate this so why not give them a real power supply, something to use all day, every day :)
Thank you Sorin never comment on a video but ive been watching you for a long time and your videos help me a lot. You made me like electronics. Thank you for everything!
Great explanation Sorin. Maybe you can use an operational amplifier to sense the voltage different between the reference voltage and the output to drive the transistor. That way you will compensate the voltage loss between the transistors and the current sensor. Anyway nice to see such a power supply from design to a functional circuit. Keep up the great videos and please do more building pojects I love it.
Hi Sorin, I've done tomorrows work today, so I'm going to build for fun a power supply, it's been years since I built one, where has the time gone, I'm leaving plenty of space for any mods you decide on , I have all the parts here, and tomorrow the build begins, this is more fun than fixing TV's :)
Thanks so much. Really enjoyed this project. Got blinking meter display, , but fixed by changing to 1000 micro Farad. Even got the magic smoke! Now need to source better rectifier.
Hello I am a new follower from Sudan to your channel really really distinctly distinctly channel, and although I do not speak English and nonetheless I understand very well every explanation of the problem provided so thank you very much and I am very happy to be among your followers sincere greetings Mister.
Brillant ! You made your point to the naysayers and educate perhaps a lot of beginners and people inclination toward electronics, so you made good ! Thanks
1st of all, I'm so grateful for all this effort and great explanations, I liked the playing with transistors to solve a puzzle. 2nd I don't understand two things here and would appreciate your support with; -for the last transistor (current releaser) I understand that the Ic should be directed from the collector to the emitter, looks like it goes oppositely to the var resistor direction?!!! -I'm wondering if this released current would affect the biasing of the 1st Darlington transistor? can we release this current directly to ground?
I like this design. It's simple and easy to understand. For example, it's easy to figure out that we need to lower the current sensing resistor and add a series resistor on the 'right' side of the current setting potmeter, in order to limit it to be set for no more than the transformer's rating: 3 amps. Next step would be to add an NTC, another resistor and a transistor. Make that transistor shunt the control voltage to ground when the heat sink gets too hot. With this, you will be able to use this power supply for locating shorting components with petrol, for a short duration. If you want to locate shorts all day long, then you will need to buy a fan or a bigger heat sink. Another idea: use a flat aluminium plate as a heat sink and add the NTC temperature limiter. If you short this, it will double as a smartphone heater, so you'll be able to open up Samsungs.
Sorin multumesc frumos pentru ceea ce faci am citit in multe carti despre surse de alimentare dar in niciuna nu am gasit asa de bine explicat cum ai facut tu, deci pot spune ca faci cat 6 carti citite de mine am sa pun si o intrebare poate stupida nu ma pricep prea bine. daca pui 2 tranzistori de aplificare ca cel care l-ai prins pe racitor in paralel oare se mai incalzeste asa de tare?
absolutely excellent tutorial on building an adjustable current and voltage power supply, enjoyed watching it from start to finish. A small perf board for a PCB to fit the components on is one idea for this it might also help with the fan controller aspect. This is a great beginners and expert course and yet you still did and excellent job at explaining, even with English as a first language we can find it hard to explain things.
Like this one. Next -make a simple class A audio amplifier.
5 років тому
Why somebody would be using class A audio amplifier? Efficiency of such amplifier is very low -- too much energy converted into heat, plus non-linearity of the amplifier which limits amplification range!!! www.tutorialspoint.com/amplifiers/class_a_power_amplifiers.htm Class A amplifier is used only in very cheap pre-amplifiers and has a lot of disadvantages -- thermal noise for example (random electron migration through semiconductor junction , a special low noise transistor are used to solve this issue which cost significantly more) www.allaboutcircuits.com/textbook/semiconductors/chpt-4/bjt-quirks/ Class AB is more efficient and compensates for non-linearity of BJT transistor -- but still has it limits. www.circuitstoday.com/class-b-power-amplifiers Class D is more efficient (more than 90%) in power consumption and does not require 'ultra expensive' power supplies. Cheap to build and recent tests show that at high power amplification there is no competitor in line. en.wikipedia.org/wiki/Class-D_amplifier Try to build 2x15W Class A amplifier to beat following Class D amplifier tinyurl.com/y22djaj4 and then compare just complexity of power supply for Class A amplifier. For PAM8610 Class D amplifier any switching power supply with output of more than 3A will do just fine. I believe most people do not have a specially equipped 'music rooms' in their homes to remove ambient noise coming from outside of their building. If you intend to build Class A amplifier -- then do it on vacuum tubes, they have very low thermal noise and give best results. But remember vacuum tubes work at high voltages and precaution should be used when you work inside of the amplifier (disconnect power otherwise you can get electrocuted). Only very good head phones and pretty high volume can mask external ambient noise. I hope that you will find next information useful www.electronics-tutorials.ws/amplifier/amplifier-classes.html
@ I agree with everything but in the same time class A amplifiers are great lesson in beginners guide to electronics so why not he build one? In the end everyone will use digital ones (sound is great and cost of build is low) but building them they will not learn a thing.
![Lp. Сердце Вселенной #60 РОЖДЕНИЕ ЛОЛОЛОШКИ [Финал] • Майнкрафт](http://i.ytimg.com/vi/YoR0pAV9FVQ/mqdefault.jpg)
Thank you, I am electronics engineer and this is just basic for me but you explained very well for beginners even though your first language is not English, there are many out there trying to teach and their first language is English but you would think they are speaking double waffle, you do this very well, thank you for your time, excellent!
i agree with you. a lot of people making the same content but it is hard to understand what they're doing, and talking more nonsense rather than to explain step by step directly the basic electornics and what the use of the transistor and how to amplify to be work in a different way. and yeah there are many out there trying to teach and their first language is English but they are speaking double waffle. and for me as a beginner in electronics it is more complicated to understand because my 1st langucage also is filipino and i'm not good in english thats why i can't understand what they are saying because of their pronunciation..😁😁😁😁 sorin is best.
I'm an old man now but I have always had an interest in electronics. Now that I am finding it harder to do more heavy work and have time to revisit my lifelong interest I feel very lucky to have tumbled upon your instructional posts. You have explained power supplies extremely well and in a manner that is simple for me thank you very much
Perfect! No one teach me how basic power supply work as good and clear as u did!.. Even u told us how each component did with the power one by one.. Briliant, You're The Man! Sorin!..
Sorin, you may have put this very informative video up 3 years ago but it most certainly has not lost any of its ability to convey a great understanding to we who are eager to understand the wonders of electronics... Thank you so much for sharing and making the mystery of electronics so clear and visible.
genuinely the best electrical concept video I have seen on youtube
what a great straight forward explanation, so many things I already 'knew' from studies years ago are finally clear now with this small practical example with the transistors. the lack of jumpcutting also makes it very easy to follow and see what you're doing. looking forward to the future examples thanks as always for the great explanations.
Good job always enjoy watching your channel for your intensive practial electronics knowledge explanation.
Boring ???? what do you mean this is the best video ever, i watched the whole of it and i didn't even blink, this is an amazing work thanks alot for your effort. keep the good work #bestteacher
Tot. agree
I not only watched the entire thing i went back several times as to jot down a note or two.
Are you being sarcastic or just an asshole, I can't tell?
oh that is very nice... You taught a whole semester of power supply theory in an hour! Thank you...
... just keep doing what you do... and others will - discover you... because you are a voice - worth hearing... [and you know ur stuff]
You and diodegonewild. Two kings of internet.
Agree.
WTF! What about bigclivedotcom, ElectroBOOM, GreatScott, Louis Rossmann???
@@dimitarnikolov3527 don't compare anyone to Sorin, he treats electronics like a pet he can play with anything because of his experience and I believe we haven't seen all his skillset yet! I've seen guys litteraly give up on fixing motherboards even though they had schematics and very advanced labs ,look at Sorin no schematics nothing special except his power supply and multimeter still does magic , let's not forget the magic hot glue trick for hinges ....
@@FerdAboubakrOnline Relax dude
@@dimitarnikolov3527 I am very relaxed indeed
I love how happy he sounds while saying that he's sunday, and then goes on working on electronics like every other day of the week haha! Thank you Sorin for sharing your knowledge with the internet!
This is perfect explanation to these people who said "current limit is equal to short protection and this is how it is done these days on a new power supplies (also current limit is more difficult to implement...". Well done Sorin!
Being a beginner, I came back to this video a few times to understand what is happening. It is pretty clear the more I watch! Thank you for explaining in detail what is going on
Finally, I can justify to my wife why I bought this oversized old audio amplifier and broke my back !
Thank you Sorin for your positive spirit and long live to your channel !
I would like to thank you Sorin for all your work. It's simple and to the point, it leaves viewers with a working project and ideas how it can be fixed or in this case build in different ways. What I mean is that you encourage people to experiment with what they have. And as you many times said "you work with what you have" that is what makes you creative. And as you repeat constantly "anyone can order a replacement part but that's not the point" Huge respect
I know this is older but I've been binge watching your channel lately and thoroughly enjoyed this!
I've wanted to buy a cheap Chinese lab power supply for a while now. Thanks to your inspiring video I can now use my previously acquired basic knowledge of electronics to build it completely for free with parts out of an old dead avr-amplifier I have laying around in my basement. Not only will it be better than anything I could have bought with my limited budget due to the audio amplifier's beefy transformer, but it will also be proof that I can implement all these things that I have been learning for the past 2 years (I have been taking basic electronics classes as an Informatics student). For it is only now that I have the feeling I can properly understand most of it. Thank you very much sir for the gift of knowledge!
What a very constructive video. You are like me. A passionnate man. Electronic is so passion for me. Very good explanation. Better than my teacher years ago. Thank's for doing this on weekend. Very kind of you. Thank you Sorin. You are a good hearted men.
Best explanation I have seen, I mean lots of guys do teardowns or draw on a whiteboard but to actually go and build the thing step by step in real time is so much better. How could you not understand after watching this and yes it is long but it is also important to not skip as you miss the reasoning behind why he is doing what he is doing.
Ive watched lots of electronic videos and being a beginner i have to say i am actually starting to learn by watching yours. Ive gone through your beginners videos and now on this. Keep doing what your doing mate. cheers
Thanks for doing this demonstration. By showing the process step by step, you have removed a lot of the mystery that surrounds power supply design. Looking around my junk box, I believe I have all the parts I need to replicate this experiment. Hope I don't blow anything up!
Wooow. Sorin, sir, that's the best video about DIY Lab power supply I seen on UA-cam or anywhere else. Clear, useful and.. powerful. Thank you very much for explaining everything so nice. :) What can you do more about this device? I'd like to see how to make a short circuit protection for example or feedback voltage compensation for stable output. :) But these are only sugestions, anything you create will be indescribably useful. :) Waiting for next parts! I'll build one simmilar to your and share my experience. Thanks!
Absolutely fantastic!
You say you are not good at explaining but I understand now what is meant by a transistor turning fully on and how it’s a amplifier.
I can see that your mind is already 3 or 4 steps in front of your actions.
This is natural to you because of how long you have been doing it.
Thank you so much.
Really liked your comment about the fact that if you get bothered by the fact that you don’t have a PCB to build on, it will put on break on your creativity. It’s so true. If you absolutely feel like you need a PCB, get a perforated, cheap one to build on with only solder pads. I’ve done it for certain compact builds. Anyway, thanks for the trip down memory lane!
this man is a legend in electronics , he claimed that he can't explain very well but in fact he is a master in make everything super easy and clear
Whoever is putting dislike is a very poor human being. Sorin is taking time on SUNDAY to explain you something he already knows for sure, FOR FREE, and instead of being thankful, you put dislikes? Really? Although I'm sure that he doesn't even care, it is still a very despicable act. The most pathetic part is that I'm sure that those 5 morons didn't even watch the video, because they are too dumb to even understand the basics.
Anyway - Thank you Sorin and I wish you all the best to you and your family.
His (jealous) competition, probably ! Or some fools who have never soldered a working PCB-less circuit in their lives
11 DISLIKE /1K LIKE =0.001 SO they are not only poor but 0 value too
Agreed!
Agree and 10000 likes if i can. Thanks Sorin.
Dislikes are residual, thus concentrate on the likes and smile... Perfection is boring, as much as automatons can be compared to human beings, and as much as perfection doesn't actually exist if not only at a subatomic level - you wouldn't want to split Sorin apart into quarks and such he would make no sense anymore.. :-)
i was working on a laptop motherboard and my senior colleague said why don't i use datasheet. I told him my master didnt teach me how to use that. it worked thanks to my master. I don't care what some people say, you are human, liable to mistake but you are the best. With love from Nigeria
Very helpful video. As an absolute beginer I managed to understand almost everything. Thanks for this video.
Felicitari! Pentru mine electronica este doar un hobby dar nu ma pot abtine sa nu ma uit. E foarte multa informatie utila, atat pentru un incepator cat si pentru un expert. Din videoclipurile tale am invatat foarte mult. Esti un profesor exceptional!
I didn’t understand how the current limit works by connecting the collector to the base of the other transistor. But I will watch it again so I can learn. That is the beauty of having this great teaching on video.
Sorin, at 1:18:28 you advise connecting the collector of the current limiting transistor to the voltage limiting pot (and also the base of the voltage limiting transistor). You call it shorting the base of one of the transistors to the emitter of the second stage transistor. In effect you are shorting the base and emitter of the two stage voltage regulating transistor pair. How will that pair then work as shorting base and emitter should render no voltage difference to drive the two stage any longer? Am I forgetting someting?
Excellent hands on tutorial - simply but clearly explained, very easily understood, and a very practical if basic power supply at the end - one of your best videos.
Thank you sorin , i really like the way you explain things. You were the first on on youtube that i could understand when it comes to electronics... thank you very much
FANTASTIC and so very understandable. The word you were looking for was sensitivity at one point then variable late in the video. I would really like for you to put the variable speed cooling fan based on temperature at the heat sink. THEN I would like to see you take that method and apply it to your new power supply so you can quiet that fan. Let me know what material you need for that and I'll buy it and have it delivered to you. In my opinion this was your best video yet! I've watched a BUNCH of them too!
You are a very good teacher. I learned a lot by the method you used. You kept adding components one at a time and explained the purpose. Thank you so much.
Thank you so much for Listening to your subscribers and spend time + money to teach us
As a total beginner this video has really helped me understand how a power supply works and how to use transistors which was a mystery to me 😂
Thank you so much for this
I watch it all all 1hour 37 minutes and few secondes Some how you are a very good teacher i learn every time on your Chanel have a nice sunday greetings from Holland netherlands
A great video I am learning alot from you sir. Your video describes 3 years at college within a max of 2 hrs. Its my pleasure continue posting these great videos and the one for making a printed board too. Very much thanks
thank you for your time in doing this video you spent 1:37h and made a lot of people happy including me, your explanation is simple and understandable, thanh you so much.
Thank you for another great video! Your step by step method, discussing & diagramming each components role and effect on the circuit, is immensely helpful for us beginners!!
THIS is the best video with genuine application and explanation of making piece of art.
You are an excellent teacher/ instructor.
Imi place modul tau de explicare. Incet, cu rabdare si ritmul vocii e domol. In modul asta simt ca au timp sa se aseze notiunile in minte.
We are still waiting for the switching mode power supply lessons. Thanks, I love your videos you are a good teacher ❤️
You are the best thing happened to youtube.
MR Sorine Diodegonewild is in fact the best electronics school on UA-cam ... I would like to see the continuation of the circuit with the addition of a short circuit protection relay, hug!
Domnule Sorin,un video foarte educativ pentru începători și amatori. O soluție ieftina și buna in stil Romanesc. O zi buna și o săptămână productiva.
Awesome ! You are the best..... Please also teach how to include the short protection
this video took me back to my electronics classes in highschool 20 years ago when I assembled a very similar linear power supply except for the current control.
Sorin.. it was an awesome way to soend time learning things in electronics on a rainy sunday.. . as you said the power supply doesn't have to be pretty to work.. all it needs to do is work for what you need it for..good work, looking forward to the next video.. cheers
not at all boring, really enjoyed it, you have a good way of explaining things
Also make video on how to prevent that voltage drop and how to add short protection
+1
Current limiter is the short circuit protection. Sorin showed how it works -- current sensing resistor signal amplified by transistor to pull down base voltage of main controlling transistor of the circuit (which is mounted on the radiator).
Reference based on zener diode does prevents voltage drop. But you can not keep voltage drop when you have short circuit -- and current limiter prevents it from happening.
Otherwise at short circuit we will have zero resistance of load and then current will be unlimited (in reality it is not possible as there is no transformer capable to provide unlimited current). If it would happen then on the transistor we would have produced infinite heat power.
The dissipated power (any kind including heat in electrical circuit) calculated by next formula P=U*I -- with infinite current heat power will become infinite at square times.
Sorin did not explained Ohm's law -- U=I*R, all three parameters of electrical circuit are dependent (related to each other).
It is other form of second law of Newton -- 'nothing appears from nowhere and nothing disappear into nothing', law of constant energy in isolated (inclosed) system (the body in motion can not accelerate/decelerate without external force)
en.wikipedia.org/wiki/Conservation_of_energy
en.wikipedia.org/wiki/Second_law_of_thermodynamics
You need to watch this video again and again until you will not understand how it works -- then your questions will not have any meaning for you, it will be obvious that this circuit perform functions which you asked for (although Sorin for simplicity did not taken into account some parameters -- as current flowing through zener diode slightly affects voltage drop on it, it can be easily corrected by placing zener diode in output circuit, how it used in precision power supplies).
Well but otherwise Sorin gave reasonable explanation how to build regulated power supply with current limit which protects from short circuit (current can not go higher preset value).
You are simply amazing and thank you so much for sharing your information with the network There are not many people willing to help like you
Great video Sorin. For the next video do temperature regulated fan control and add output feedback control.
Very useful sir. waiting for the next fan control video
That's a very good video thanks a lot
I have a question however, in my country I failing to get BJTs so how can I go about it if I want to create a power supply using a mosfets?
Wow, wow and wow. Sorin you have hit the jackpot now, look at all of the feedback. Well done and please keep the good work up.
I like all your videos but this one is the most important one for me.. Thanks alot
Nice video, thank you for explaining. I hope you will find time to do a second part where you replace the 1ohm resistor with a lower one, maybe 0.1ohm, use an opamp and maybe some feedback from the output. And yes, design a board and build the damn power supply with a fan, LEDs and other cool stuff. You know people will try to replicate this so why not give them a real power supply, something to use all day, every day :)
Really enjoyed getting back to basics. Keep up the good work Sorin
Bravo Sorin! M-a ajutat foarte mult acest video. Multumesc si iti urez succes.
The best teacher ever
Thank you Sorin never comment on a video but ive been watching you for a long time and your videos help me a lot. You made me like electronics. Thank you for everything!
its good that you are uploading videos these days, when you stopped uploading i forgot the days haha
Thank you for your help to the student who is studying electronic field especially power circuits
That was a nice and simple explenation and demonstration on how to build a simple power supply.
Great explanation Sorin.
Maybe you can use an operational amplifier to sense the voltage different between the reference voltage and the output to drive the transistor.
That way you will compensate the voltage loss between the transistors and the current sensor.
Anyway nice to see such a power supply from design to a functional circuit.
Keep up the great videos and please do more building pojects I love it.
Hi Sorin, I've done tomorrows work today, so I'm going to build for fun a power supply, it's been years since I built one, where has the time gone, I'm leaving plenty of space for any mods you decide on , I have all the parts here, and tomorrow the build begins, this is more fun than fixing TV's :)
GREATEST CHANNEL ON UA-cam
Very nice work explaining Thanks Sorin
What a good teacher! I appreciate.
This was for me, one of the best video that i ever saw at UA-cam. Thank you very much for your explanation! I understood you very well!
Thanks so much. Really enjoyed this project. Got blinking meter display, , but fixed by changing to 1000 micro Farad. Even got the magic smoke! Now need to source better rectifier.
Good work. good knowledge excellent example to do on sundays with kids. Thank you for the time you give us. We are with you.
Thank you, Sorin, for sharing knowledge! This is great thing!
Great video Sorin, would love to see more like this :) Good work!
Modern day breadboarding! Great explanation of power supply fundamentals! Very useful.
Hello I am a new follower from Sudan to your channel really really distinctly distinctly channel, and although I do not speak English and nonetheless I understand very well every explanation of the problem provided so thank you very much and I am very happy to be among your followers sincere greetings Mister.
you so awesome you can write with left and right hands.love your stuff bro
15.27 "Ok, this is plugged..."
He just had an ElectroBOOM moment!
Sorin, thank you so much. Great video. Good explanation. Please make more of this.
all good so far - cant wait for feedback circuit
have always been into electronics as hobby, never learned power supplies, thank you for this
I like your explanations with drawing the schematic - this is missing at your work in the shop. Keep going on. Thx Sorin.
Sorin Sir, Thank you so much. You are always helpful. I think I will try to make with your schematic soon!
Yes lets use the board. Would be nice to learn a variable power supply from start to finish and what is happening during the process ;)
Great job Sorin, beautifully explained in layman's terms! PLEASE do a video for the controlled fan!!!! Looking forward...
It was very entertaining to watch this video, even though I have a degree in electronics.
Excellent vid, your explanation is so clear and makes things much clearer.
Thank you so much for sharing your knowledge with us. This video made quite a few things click in my brain.
Brillant ! You made your point to the naysayers and educate perhaps a lot of beginners and people inclination toward electronics, so you made good ! Thanks
1st of all, I'm so grateful for all this effort and great explanations, I liked the playing with transistors to solve a puzzle.
2nd I don't understand two things here and would appreciate your support with;
-for the last transistor (current releaser) I understand that the Ic should be directed from the collector to the emitter, looks like it goes oppositely to the var resistor direction?!!!
-I'm wondering if this released current would affect the biasing of the 1st Darlington transistor? can we release this current directly to ground?
I made my own linear PSU with a 317 and some fancy features but no current control, so the video was good at explaining how that all worked, cheers
we love your work and teaching skills Sorin. Thank You
I can finally build a bench power supply..thank you sorin..
Best teacher right here!
I like this design. It's simple and easy to understand. For example, it's easy to figure out that we need to lower the current sensing resistor and add a series resistor on the 'right' side of the current setting potmeter, in order to limit it to be set for no more than the transformer's rating: 3 amps. Next step would be to add an NTC, another resistor and a transistor. Make that transistor shunt the control voltage to ground when the heat sink gets too hot. With this, you will be able to use this power supply for locating shorting components with petrol, for a short duration. If you want to locate shorts all day long, then you will need to buy a fan or a bigger heat sink.
Another idea: use a flat aluminium plate as a heat sink and add the NTC temperature limiter. If you short this, it will double as a smartphone heater, so you'll be able to open up Samsungs.
Sorin multumesc frumos pentru ceea ce faci am citit in multe carti despre surse de alimentare dar in niciuna nu am gasit asa de bine explicat cum ai facut tu, deci pot spune ca faci cat 6 carti citite de mine am sa pun si o intrebare poate stupida nu ma pricep prea bine. daca pui 2 tranzistori de aplificare ca cel care l-ai prins pe racitor in paralel oare se mai incalzeste asa de tare?
absolutely excellent tutorial on building an adjustable current and voltage power supply, enjoyed watching it from start to finish. A small perf board for a PCB to fit the components on is one idea for this it might also help with the fan controller aspect. This is a great beginners and expert course and yet you still did and excellent job at explaining, even with English as a first language we can find it hard to explain things.
Like this one. Next -make a simple class A audio amplifier.
Why somebody would be using class A audio amplifier? Efficiency of such amplifier is very low -- too much energy converted into heat, plus non-linearity of the amplifier which limits amplification range!!!
www.tutorialspoint.com/amplifiers/class_a_power_amplifiers.htm
Class A amplifier is used only in very cheap pre-amplifiers and has a lot of disadvantages -- thermal noise for example (random electron migration through semiconductor junction , a special low noise transistor are used to solve this issue which cost significantly more)
www.allaboutcircuits.com/textbook/semiconductors/chpt-4/bjt-quirks/
Class AB is more efficient and compensates for non-linearity of BJT transistor -- but still has it limits.
www.circuitstoday.com/class-b-power-amplifiers
Class D is more efficient (more than 90%) in power consumption and does not require 'ultra expensive' power supplies. Cheap to build and recent tests show that at high power amplification there is no competitor in line.
en.wikipedia.org/wiki/Class-D_amplifier
Try to build 2x15W Class A amplifier to beat following Class D amplifier
tinyurl.com/y22djaj4
and then compare just complexity of power supply for Class A amplifier.
For PAM8610 Class D amplifier any switching power supply with output of more than 3A will do just fine.
I believe most people do not have a specially equipped 'music rooms' in their homes to remove ambient noise coming from outside of their building.
If you intend to build Class A amplifier -- then do it on vacuum tubes, they have very low thermal noise and give best results. But remember vacuum tubes work at high voltages and precaution should be used when you work inside of the amplifier (disconnect power otherwise you can get electrocuted).
Only very good head phones and pretty high volume can mask external ambient noise.
I hope that you will find next information useful
www.electronics-tutorials.ws/amplifier/amplifier-classes.html
@ I agree with everything but in the same time class A amplifiers are great lesson in beginners guide to electronics so why not he build one? In the end everyone will use digital ones (sound is great and cost of build is low) but building them they will not learn a thing.