As someone who has watched hundreds of video's on electronics trying to learn hobby electronics, I have to say your explanations are the absolute best. You break things down and keep my head from exploding. haha Thank you so much for your concise, interesting method of teaching! Please keep up the wonderful work and God bless you!
I thought this was excellent. Watched it over the weekend and decided to look for part 2 today, which was coincidentally posted on the same day.. !! I've actually just pulled apart my PIR and was thinking that it must have been using some sort of voltage divider to bring down the voltage as there was no transformer... the schematic for that was helpful in understanding.
There are a lot of variations in these divider circuits inside PIRs. For example sometimes youf find a circuit like I the one I've shown in the video and other times it's a bit different in that you might have only one cap and one resistor as a complex divider. But the idea is always the same: getting around using an expensive transformer :D. It's realy funny to hear about the "chain of events" you described in your post: I mean what are the odds ? Maybe it's just teaching us one thing: The worls is big and no matter how obscure your hobbies are, there is always another guy somewhere in the world who is thinking about the same thing at the same time :D
Excellent... I find that not just knowledge proper, but the organization thereof is as important. I like your explanations so much. They are very clear, precise and in order. Thanks. Keep the good spirit up. :)
I'm glad to hear that. I put a lot of work in it. Part 2 is in the making, but it requires a lot of drawing, scanning, filming and editing too. It will come out some time in the next weeks. I'm very busy right now working on several new videos. If you like it then please subscribe. That way you will see immediately when I have uploaded it.
For someone just getting into electronics field, thank you! Your video's have explained a varying topics much better then the teachers I have at the moment, its is most appreciated!
Thank you so much for making these instructional videos. They reinforced concepts I learned from school. I just wished my college professors are half as good as you.
Thank you for these video tutorials. Having no formal electronic background I find them very informative, albeit for now a bit abstract on first watch. Thanks for the effort putting the videos together and I am looking forward to your future episodes broadening my understanding of SMPS. P.S. The white board graphics are very helpful and quite fitting the channel and content structure.
What I did was pick up throw away dvd players and stuff, I pulled the power supply boards and then experiment with them. You can connect light blubs and power them on use your oscilloscope to check signals.
Just found this video and upvoted it!!!Good stuff mate...keep up the good work. And who on earth posted those 4 downvotes...seriously...its free,clearly explained concepts available in video format...
I love the tutorials. I wish I would've had a high school shop teacher like this....but then I wish I would've spent less time smoking weed during high school.....East Detroit High....very high
High power triacs and SCRs (thyristors) are commonly used in variable power heating appliances. They are usually "burst controlled" as phase angle causes too much EMI.
I uploaded a new video about another topic two days ago. It's basically about stabilizing and inverting voltages obtained from a DC generator. It doesn't go into depth about smps yet, but it involves two switching topologies and might have some interesting ideas for you. I guess that part 2 of the tutorial will be ready next week. At this moment however I work on a system of remote control circuits that I want to finish first. If you want to stay up to date about my videos then please subscribe !
The_Post_Apocalyptic_Inventor Yes , I watched your latest video already , I like your way of teaching , easy to follow , I already subscribed your channel . keep up your good work . Thanks
+dogintwater Sorry to be a nitpicker ( That's how we Germans are :D) He's called "Nikola" and not "Nikolay". Yes I know it sound's like a girl's name, but that's how it is.
Herr Inventor, as you develop your SMPS series, would you consider commenting on how to reduce or eliminate RFI in your design discussions? From tearing down old SMPS I see tiny ferrite toroids on FET leads and such, but perhaps there are other techniques? I am a radio amateur and seek to eliminate computer generated RFI which can interfere with reception on lower HF bands such as 160M and 80M, and 30M which pick up fundamental and harmonic noise from so-called colorburst video chips during reception. FWIW I use a lot of 31 material ferrite toroids to choke common mode on outdoor antennas and on equipment leads inside to some advantage. Bis spater! chuck ab1vl
HI I have a problem I encounter that my supposed to be -15Vdc output in my old power uspply measured only -13Vdc. I checked the capacitance of the capacitor and it is within 20% tolerance. what is the possible cause of the problem. TIA...
ich habe eine frage an sie: In englischsprachigen videos ist oft von "Variacs" die Rede, mich interessiert ob und wo man so etwas in Österreich bekommen könnte! Vielen Dank im Vorhinein
lego getriebe Ich glaube es heisst Stelltransformator oder "Stelltrafo" auf Deutsch. Ich habe es auf Amazon gefunden: www.amazon.de/Ringkern-Stelltrafo-McPower-V-2000-0-250V-500W/dp/B000NI4QGS/ref=sr_1_2?ie=UTF8&qid=1430327624&sr=8-2&keywords=stelltransformator (Entschuldigung, Deutsch ist nicht meine erste Sprache.)
The schematic of "full wave rectifier with center tap" (16:47) confuses me. It seems that the polarity of the upper Elco and the direction of the U1 Arrow are reversed....
Habati 65 The circuit is correct. Are you familiar with the concept of "negative voltages" ? This circuit is used to obtain one "positive" and one "negative" voltage with respect to the chassis ground. During the positive half cycle of the sine wave the filter capacitor for the positive voltage is charged and during the negative half cycle the other capacitor is charged. Why do you need such a circuit? Well amplifier circuits need theese "symmetrical" supply voltages so that they can deliver an AC-Signal at their outrput.
The Post Apocalyptic Inventor Hi, thanks for the quick reply. You mentioning the chassis ground leads me to think that you are referring to the second drawing while I was referring the the third one. Is there no relation between the direction of the Arrow and the polarity of the the elco in the third/bottom drawing? Must compliment you for the thorough and thoughtful way you have made your video's. It is a stark contrast to many improvised and long-drawn other video's on the same subject.
Habati 65 Yes you are right the arrow of v_out2 should be drawn the other way around. I have overseen this when scanning the pictures for the video. I will make an annotation for that. Thank you for the hint ! ( In general: Normally you can draw the arrows in any direction you want, as long as the voltage-values that belong to that arrow have the correct polarity (- or + ). In this case there are no values for the voltage. So it is strictly speaking not wrong to draw the arrows like I did. But since the direction of the arrows are supposed to give a hint towards the polarity of the output voltages, I should have drawn it the other way round.)
![ไลฟ์สุ่ม iPhone 295 บาท... โกงมั้ย?[ โกงมั้ยครับ ep.97 ] | DOM](http://i.ytimg.com/vi/gdstHEE4UUE/mqdefault.jpg)
As someone who has watched hundreds of video's on electronics trying to learn hobby electronics, I have to say your explanations are the absolute best. You break things down and keep my head from exploding. haha Thank you so much for your concise, interesting method of teaching! Please keep up the wonderful work and God bless you!
this guy makes it so easy and my instructor make it seem as if he's teaching quantum mechanics
part 2 is now online:
SMPS Tutorial (2): DC to DC Converters(1), Linear Regulators and Voltage References
Excellent video, it deserves far more views than it's got. I'm anxious to watch the other parts!
hey I've send you a personal message just yesterday. I didn't no that you answered me to an older message until yesterday. I beg you pardon.
I thought this was excellent. Watched it over the weekend and decided to look for part 2 today, which was coincidentally posted on the same day.. !! I've actually just pulled apart my PIR and was thinking that it must have been using some sort of voltage divider to bring down the voltage as there was no transformer... the schematic for that was helpful in understanding.
There are a lot of variations in these divider circuits inside PIRs. For example sometimes youf find a circuit like I the one I've shown in the video and other times it's a bit different in that you might have only one cap and one resistor as a complex divider. But the idea is always the same: getting around using an expensive transformer :D.
It's realy funny to hear about the "chain of events" you described in your post: I mean what are the odds ? Maybe it's just teaching us one thing: The worls is big and no matter how obscure your hobbies are, there is always another guy somewhere in the world who is thinking about the same thing at the same time :D
Excellent... I find that not just knowledge proper, but the organization thereof is as important. I like your explanations so much. They are very clear, precise and in order. Thanks. Keep the good spirit up. :)
This is a great introduction - I'm looking forward to part 2!
I'm glad to hear that. I put a lot of work in it. Part 2 is in the making, but it requires a lot of drawing, scanning, filming and editing too. It will come out some time in the next weeks. I'm very busy right now working on several new videos. If you like it then please subscribe. That way you will see immediately when I have uploaded it.
For someone just getting into electronics field, thank you! Your video's have explained a varying topics much better then the teachers I have at the moment, its is most appreciated!
What a nice assortment of power supplies you have there!
Yeah an 'assortment' it sure is, but it is actually only a small fraction of what I have ;)
I have learnt more about electricity from watching these excellent Post Apocalyptic Inventors videos than from my physics teacher.
+Earl of Destruction I couldn't agree more. and your comment, prompted me to leave one of my own.
Thank you so much for making these instructional videos. They reinforced concepts I learned from school. I just wished my college professors are half as good as you.
Thank you for these video tutorials. Having no formal electronic background I find them very informative, albeit for now a bit abstract on first watch. Thanks for the effort putting the videos together and I am looking forward to your future episodes broadening my understanding of SMPS.
P.S. The white board graphics are very helpful and quite fitting the channel and content structure.
Just wanted to say "Thank You" for all the work you have done! I have learned a lot and appreciate your efforts!
What I did was pick up throw away dvd players and stuff, I pulled the power supply boards and then experiment with them. You can connect light blubs and power them on use your oscilloscope to check signals.
Just found this video and upvoted it!!!Good stuff mate...keep up the good work.
And who on earth posted those 4 downvotes...seriously...its free,clearly explained concepts available in video format...
I love the tutorials.
I wish I would've had a high school shop teacher like this....but then I wish I would've spent less time smoking weed during high school.....East Detroit High....very high
Your videos are very good and really add up very much to my knowledge of smps.
High power triacs and SCRs (thyristors) are commonly used in variable power heating appliances. They are usually "burst controlled" as phase angle causes too much EMI.
Great explanations so far, I will watch the next parts now!
This is SO useful! Sincerely, thank you so much for your effort! Definitely a treasure for lots of people around the world.
Great videos . Please keep making more and more detailed
Sir you are so good... I am waiting for smps next video plzzz tell me when you will upload it... Thx
Your teaching way is awesome love it
Can't wait , please upload the videos sooner. Thanks
I uploaded a new video about another topic two days ago. It's basically about stabilizing and inverting voltages obtained from a DC generator. It doesn't go into depth about smps yet, but it involves two switching topologies and might have some interesting ideas for you. I guess that part 2 of the tutorial will be ready next week. At this moment however I work on a system of remote control circuits that I want to finish first. If you want to stay up to date about my videos then please subscribe !
The_Post_Apocalyptic_Inventor Yes , I watched your latest video already , I like your way of teaching , easy to follow , I already subscribed your channel . keep up your good work . Thanks
Excellent video. Watched it twice... Thanks
Thank you very much for your time. Highly interesting and easy to understand.
you are the greatest. a fountain of knowledge.
A job well done.Quite informative.
it was very intresting ...and knowledgable
you have an accent of the world my friend!
Nikolay Tesla called, he wants his transformers back, ALL of them.
+dogintwater Sorry to be a nitpicker ( That's how we Germans are :D)
He's called "Nikola" and not "Nikolay". Yes I know it sound's like a girl's name, but that's how it is.
Sir
A video on designing the buck and boost converter would be helpful
Herr Inventor, as you develop your SMPS series, would you consider commenting on how to reduce or eliminate RFI in your design discussions? From tearing down old SMPS I see tiny ferrite toroids on FET leads and such, but perhaps there are other techniques? I am a radio amateur and seek to eliminate computer generated RFI which can interfere with reception on lower HF bands such as 160M and 80M, and 30M which pick up fundamental and harmonic noise from so-called colorburst video chips during reception. FWIW I use a lot of 31 material ferrite toroids to choke common mode on outdoor antennas and on equipment leads inside to some advantage. Bis spater! chuck ab1vl
man ... you are awesome very well done... keep the good work.. :-D
great video man, thank you a lot
HI I have a problem I encounter that my supposed to be -15Vdc output in my old power uspply measured only -13Vdc. I checked the capacitance of the capacitor and it is within 20% tolerance. what is the possible cause of the problem. TIA...
ich habe eine frage an sie:
In englischsprachigen videos ist oft von "Variacs" die Rede,
mich interessiert ob und wo man so etwas in Österreich bekommen könnte!
Vielen Dank im Vorhinein
lego getriebe Ich glaube es heisst Stelltransformator oder "Stelltrafo" auf Deutsch. Ich habe es auf Amazon gefunden:
www.amazon.de/Ringkern-Stelltrafo-McPower-V-2000-0-250V-500W/dp/B000NI4QGS/ref=sr_1_2?ie=UTF8&qid=1430327624&sr=8-2&keywords=stelltransformator
(Entschuldigung, Deutsch ist nicht meine erste Sprache.)
Vielen dank!
Very good basis
excellent
can anyone suggest where one might purchase the grey rubber table cover with the circles in it?
nice intro!
I just Subscribed
Can i buy from you transistors and ICs?
Can any one explain to me whats a quasi resonant zero current dc-dc converter?
where Can I find part 2
You can the link to part two in the video description
bravo
The schematic of "full wave rectifier with center tap" (16:47) confuses me. It seems that the polarity of the upper Elco and the direction of the U1 Arrow are reversed....
Habati 65 The circuit is correct. Are you familiar with the concept of "negative voltages" ? This circuit is used to obtain one "positive" and one "negative" voltage with respect to the chassis ground. During the positive half cycle of the sine wave the filter capacitor for the positive voltage is charged and during the negative half cycle the other capacitor is charged. Why do you need such a circuit? Well amplifier circuits need theese "symmetrical" supply voltages so that they can deliver an AC-Signal at their outrput.
The Post Apocalyptic Inventor Hi, thanks for the quick reply. You mentioning the chassis ground leads me to think that you are referring to the second drawing while I was referring the the third one. Is there no relation between the direction of the Arrow and the polarity of the the elco in the third/bottom drawing? Must compliment you for the thorough and thoughtful way you have made your video's. It is a stark contrast to many improvised and long-drawn other video's on the same subject.
Habati 65 Yes you are right the arrow of v_out2 should be drawn the other way around. I have overseen this when scanning the pictures for the video. I will make an annotation for that. Thank you for the hint !
( In general: Normally you can draw the arrows in any direction you want, as long as the voltage-values that belong to that arrow have the correct polarity (- or + ). In this case there are no values for the voltage. So it is strictly speaking not wrong to draw the arrows like I did. But since the direction of the arrows are supposed to give a hint towards the polarity of the output voltages, I should have drawn it the other way round.)
Great
svp jaimerais quon traduise vos commentaires en francais
+raoul bamenou
Quand c'est en arabe tu fais pas ce genre de reflexions, et pourtant y en a des tonnes en informatique, réseaux, electronique etc...
arar