Diode Tutorial & How to build an AC to DC power supply

[@mukeshpandya4171]

Man how i hate this, as Engineering student books were the only source 20 yrs back for us. and using web sites took long time to load on 64kbps on PPP and using search like Alta Vista, AOL etc.. and now, look at this video and instructors all around the world giving easy to understand, point by point simulation and educating kids all around the world for free via videos... Great Work; loved your video and work...

[@haydenbarton96]

Its amazing, unfortunately 99% of kids these days dont bother to use the information at there fingertips and watch cat videos instead

[@mukeshpandya4171]

Hayden Barton hehe :)

[@ian_b]

I agree, except when I was a kid in the 1970s there was nothing but buying books, or the town library (we haven't got that book, we can get it from another library, it will take two weeks...). No online, no modems of any speed. I found some old astronomy books from my youth (I was born in 1966) recently and was shocked at how little information they actually contained, and most of them had the same information as the others. A child today could learn more in twenty minutes on Wikipedia or watch instructive videos. These are wondrous times.

[@absmustang]

hahaha..."Alta Vista"

[@etunimi4206]

I am in the few % of kids who actually either understand a bit or do electric gadgets/connections, etc. Not that many of us either have: The Courage, Will, or just plain old know how. I am the age of 15 years, I've been interested in electrics since I almost got my self killed by touching the mains with a pin as a little child. I'm happy that all of this information is handed to us like an golden secret. It is quite sad to see that not that many of us want to spend an (min.) hour of researching.

[@Nirotix]

WOW!! I just stumbled across your video's... This is AWESOME!! I built an unregulated 12v power supply for an Alpine car head unit I was using in my bedroom for source (CD/Radio) back when I was 16 b/c I had no need of it anymore, and wanted to use it b/c it was small and had a remote. So I strapped it underneath a shelf, bought a transformer and bridge rectifier, cap.. soldered them together and there I had it. I've forgotten how to do most everything electronic now I'm 34. TY 4 the video!

[@Afrotechmods]

Interested in learning about wireless power? Subscribers can get up to 80% off my course Wireless Power to the People - Wireless Charging 101 on udemy using the coupon code "KZbin" www.udemy.com/wireless-power-to-the-people-wireless-charging-101/?couponCode=KZbin

[@MyBigThing2010]

THAT was an AWESOME VIDEO! That's the way it should be done! The video has taken up 3 pages in my notebook (I'm in the learning/tinkering phase still) and now I FULLY UNDERSTAND what a bridge rectifier is, how it's made, how to build, all the components functions through the entire wave form and its benefits and limitations when applied to various types of builds/projects and when to and not to use one! 35 minutes ago I didn't have a clue what this "bridge rectification" alien technology was or what it was all about and now I feel way smarter because of an 11:19 video that I kept rewinding parts of and taking notes. Being smarter after a video doesn't happen often while watching KZbin! This is the gold standard of how/when/why/where electronics videos should be done. WELL DONE SIR! THANK SO YOU! YOU HAVE BEEN SUBBED! I hope the rest of your vids are just like this!

[@Afrotechmods]

Thanks!

[@theaccountant5133]

Good tutorial. Moved along fairly fast but illustrations were excellent and professional looking.

[@happysoul941]

Typed a big comment and lost it, grrrr You won me. I'd have chosen electronics for my engineering had such videos been available in my days. You make it look all so easy. Hats off to you. Please keep up the awesome work. You're better than university professors. Subscribed midway through the video. You've got me hooked.

[@multi_misa72]

got your self another subscriber dude. awesome and clear to understand video. thanks a million.

[@Arthur61987]

Awesome video. Very clear and understandable. I'm currently building a dc power supply and this video helped a lot. I thought I had bridge rectifiers pretty much figured out but I never thought of it doubling the frequency. Thank you.

[@bizeedoinnuffin]

Your Video has explained this to me well. You are better than all my electronics teachers put together. Your teaching was of such a high standard, you actually made me interested in doing something as a result. Thankyou.

[@SreenikethanI]

**ElectroBOOM sees **07:58**** I guess it's using my patented *FULL BRIDGE RECTIFIER!!!*

[@BillAnt]

Thought you were talking about a Full Bridge Rectum-fier xD Every time I hear that just cracks me up... ha-ha

[@joao.henrique]

damn .. i did read hearing him voice .;lol

[@jaynee8581]

@@BillAnt he has made a full bridge rectum frier

[@kolgax2064]

@@BillAnt FULL BRIDGE RECTIFIER!!! = ElectroBOOM Rectum Frier = AvM

[@Rainbow__cookie]

Electroboom *full bridge rectifier* Full bridge rectifiers creator: I am a joke to you

[@B.r.i.a.n.1]

Best teacher on youtube, easy to understand lessons. Awesome Channel.

[@linuxmanju]

Sir , the best thing I did this year is finding ur channel and subscribing to it 👍.. thank u

[@ElectricalTechnolog]

This video was really helpful.

[@ray6652]

After watching this tutorial and the way you explain everything is just so understanding. I ahve never made a rectifier before but with what i have just seen i can. Fantasic video, all the best ray

[@wjames092]

Awesome Tutorial i wonder if i was tought like this!!

[@benkanobe7500]

Learned more here (about electric components and how to use them) from him than while earning my BSME. Excellent Teacher. I just subscribed !!

[@tonydipietro4225]

Great video! Im a novice guitar effect pedal builder and want to build units with power supplies. This really clarified that process for me. Thanks for posting.

[@ubuntututorials]

Good to see you back. We're doing diodes in electronics classes at the moment.

[@TukieeSK]

I learn more from your videos than from 4 years of engineering school.

[@UEGUnequaled]

You've got my subscription! You explain it way better than those Indian professors at Purdue!

[@trewmika1869]

3:00 - this IS 5A diode, in theory. There is some variation, but as the forward voltage gets higher with current, other diodes start to conduct as well. In my car battery charger, I had four diodes in full bridge, but they kept burning. So I added four more in parallel and it worked. With BJTs, this is the same thing. It may not be the best, but it works.

[@YazinS]

Awesome video -- love the step-by-step approach you've taken: problem -> solution -> caveat -> better solution ...

[@hippietv]

You are an excellent teacher Sir. I knew some of this years ago, but this is excellent for a refresher course. Looking forward to trying out what I've learned here. Thank you

[@Twat2024]

Amaizing, most vids had me lost, this was so simple and sooooooo easy to understand! U are a true master

[@wairarapagates4857]

I need to watch more of your video's, this stuff is fascinating and confusing all at the same time.

[@AnonMedic]

7:55 This circuit on older cars for converting the AC from the alternator/generator, is in a module along with the voltage regulator. for older GMs it was bolted to the firewall. Most modern cars and trucks have all these circuits packaged with the alternator. Every automotive tech should know exactly what this is, and how it works.

[@Raykenn1]

Excellent video. I wish they had explained it this simply back when I was in college.

[@404gatito]

Thanks for uploading this video you really took the time to explain how things work. I'm building my own wind turbine down here in Mexico but I want to understand power first.. thanks a lot!

[@arqmediagroup390]

this video will help me complete my project of building a self powered gen-set

[@dodlaisdodla]

AM A SCIENCE GRADUATE. REALLY YOUR HELPING ME A LOT SIR. THANK YOU. PLS GO ON POSTING.

[@Teknician89]

Hello, The output of his bridge rectifier was technically DC because the voltage coming out of it never went negative. However, before he added capacitance to the circuit, the output of the bridge rectifier was still changing periodically, at a frequency of 120 Hz. Hope this helps :).

[@yonchvader]

Hi, I was going to build an AC to DC converter but luckily I watched this video before. I'm planning to covert 220VAC to 24VAC and then build a rectifier, separate the wire, on one end use a 470ohm & 130ohm (voltage divider) and feed the circuit with the two 5V and one 24V that it needs. Are my values correct? (I can make a video response if it helps) thanks in advance! Your tutorials are the best on youtube. Keep doing them!!!!!

[@lalitmali1879]

Very helpful for me I am studying in Electrical Engineering 1st year my college project very very helpful your video

[@BrittanySuellnfsisters]

Scott said it pretty good! You are great at making videos and really know your stuff. Bravo and thank you!

[@Chuechco93]

I like the style you present electronics. You should write a book like this :)

[@KrissernD]

You're considerably better than my teacher.

[@JackArn123]

so helpful!! i now understand what capacitors are actually used for!

[@Afrotechmods]

@StinkyCheese9999 The problem is that Vf drops as temp increases, so if there is ever a situation where one diode starts out with the lowest Vf and its temp rises significantly above the other diodes you get thermal runaway and that diode ends up taking all the current. Some products get away with it, but it is bad design and a single bigger diode should ideally be used.

[@cawaboonga85]

This videos are so addictive. :D Thank you Afrotechmods!

[@johnarizona3820]

Hey friend, just found your channel and wanted to say thanks, THANKS! Awesome info and explanations so again GRACIAS AMIGO!

[@bing434]

Great video. Best tutorials on YT for electronics :D looking forward to the next one.

[@erin19030]

To D.C. A cap appears to be a short circuit at first, until it charges up. Don't use an input cap too large and use a choke inductor as the Pi element. Then you can use a larger cap on the output.

[@durian789]

Excellent teaching materials mate. Spot on.

[@KKALFAKIS]

congradulations for your excelent explanations and splendid talk

[@PantsLaRue]

These videos are exactly what I've been looking. Thank you !

[@SuperToughnut]

I want more videos! Keep up the good work!

[@lykp]

Thank you very much. Very nice diagrams, explanations etc. Congratz!

[@Mandrag0ras]

Great video. It taught me a lot but it also raised some questions. Why is it shown that electricity flows from anode to cathode? Is it because the conventional current flow is used in your video? Do you happen to know if this is the reason why probes in the program National Instruments Multisim report reverse current flow? Why is there always a ground at your diagrams (4:44). What's its use? I noticed that the Multisim, the program I mentioned above also forces the user to use a ground in order for the simulation to start. But why is it necessary when a lot of electronics don't use it?

[@ArcanePath360]

Wow, super helpful and easy to understand. Thanks

[@ultrapredatorr]

you amaze me all the time great videos keep up the good work .

[@stampbou]

Thank you so much for your time and effort. This has been a great help.

[@Nadrealis]

now, knowing this knowledge, I'm gonna go get a hobby box, a PCB, transformer, and a wire so I can power whatever I want!

[@Luckylearner]

fantastic tuturials. Realy helpful

[@matthabaneyugo2538]

great video... I remember my basic electronic knowledge and thats an awesome tutorial...:)

[@cbmeeks]

That was awesome! Makes me want to build some power supplies for my old Sega's and NES's. :-) Thanks!

[@stevenismybro]

Thank you so much! Now I understand full-wave rectifiers!

[@minimeguju6868]

Just a constructive critique, If you have three capacitor on the board, u should show 3 caps in the schematic as well instead of just adding the values for beginers. Rest is great presentation, just subscribed.

[@Trevorjhk]

This is brilliant and very interesting and informative

[@joshstube]

@Afrotechmods Thanks, I really enjoy your simplification in your videos. Although in this one I had to research further to find out about the 'Transformer Center Tap' before I was able to completely understand full wave rectification. . A question ?? I was surprised to find when opening up cheap unregulated 'usb type' chargers that most do this process in reverse. (diodes first, then transformer) Do you know why? They need higher voltage parts as a result, what would be the advantages?

[@Rawman_56]

superb explanation sir............

[@amihartz]

I'm a newb at electronics and I'm trying to get this circuit to work but I get a massive voltage drop at 5:46 and I'm not sure why. The rectified AC is ~7.6 volts (9v minus two diode drops) after the diode. However, once it gets to the capacitor, depending on what resistor I use, I either measure as low as 2 volts or as high as 7 volts. I checked with an oscilloscope and the voltage is not oscillating, it is a steady 2-7 volts after the capacitor, but it drastically changes based on the resistor. The circuit is exactly the same as the one you used in 5:46 which is what I based it off of, although I used a super diode rather than a regular diode (since the voltage I'm rectifying is 0.11 volts, so I amplify it up to 7.6 as well as rectify it and then I pass the output into the capacitor and resistor in parallel).

[@reviathon360]

A way to smoth voltage out even more is to use inductors.

[@emuman100]

Explained beautifully!

[@slardar92]

One of the best video..thanks

[@kiddolols]

im not sure but i think the diode's "arrow" is the direction which conventional current flows (from positive to negative)

[@robinwilson-sauls9891]

Smart information-if you were to fill in the information not yet covered. Your only teach those who already know what your talking about. Please-break it down for we who want/need to know more!

[@kimoussitr]

ok now its clear enough i'll keep repeatin' this vid !

[@abilail]

i like it... it really good and understandable thank you .

[@StaigeFright]

I am just learning so help me out a little. If the positive half of the wave passes in the direction of the band toward the cathode, how does anything pass through on the negative ac side? I am talking about you bridge rectifier. Looking at the color code on your diagram, it suggest to me that there is a positive and negative at each half of the wave form. Or does it mean that the negative ac, have some type of current flow? I know I sound stupid but that is how we learn. Confused?

[@BhupinderSingh]

Very well explained.

[@ngmngoc]

Very nice and helpfully . Thank you

[@timnye6134]

Good shit...This makes learning fun!!!

[@abdelkader_faleh]

Nice explanation !

[@techsavantlove]

At the time mark of 2.50 you mention NOT to parallel diodes to "share" power dissipation._ Is this specifically because the voltage drop characteristic would vary slightly between different diodes, even the same part numbers?__ Hence one diode would be operating at a significantly different point on it's Ampere vs Voltage and Power Dissipation curve?__ I am working on a design for a heavy duty charger for automobile lead acid batteries. I was considering using a separate 50 amp rated power diode for each of the 4 bridge diodes. I would use huge heat sinking, of course.__ I could not afford to buy a whole basket of diodes and test each one infividually. In other words, I can't create a Ampere/Voltage curve for each one, trying to find 4 that have identical characteristics.Thank YouYour video's are very nice, and easy to understand.

[@Afrotechmods]

+douglas “The flame is dead” lee Yes it is because of the variance between diodes. In some scenarios like one-off prototypes you can get away with paralelling, but I strongly recommend against doing it in any sort of commercial product. You described wanting to make a bridge rectifier out of 4 diodes, well if you think about it none of those diodes are in parallel. So you don't have to worry about matching them or characterizing them. 4 massive schottkys with a heatsink should work.

[@techsavantlove]

+Afrotechmods Thank You

[@sreenivasanm4303]

Best explained video.

[@JG-kw1fx]

Awesome video dude, thank you!

[@anandrattu]

I opened my car door lock actuator, I found both diodes are damaged. It is a black diode with a silver ring one side and a letter 5 on it, could you please tell me what is the number of this diode and where can I find it???

[@OsmosisHD]

Thank you. this was very helpful ! gonna check more of your tutorial's

[@andreasantoniades8776]

very educating video!!Thanks

[@trance183]

I have a HUGE question! Where do you find the switching speed? Where on the datasheet can you find how many HERTZ the diode can handle? I really need to know.

[@will8649]

Lol my school really sucks i learned more here then in 3 years school

[@arielgarcia4199]

its so awesome!!! well said and explained.

[@coilsinamotor]

i watch you videos as entertainment XD

[@speedbumphu]

Awesome tutorial!

[@alexandermihailov1092]

Hi and thanks for the video! On 2:15 you are burning a component ... I'm repairing a device and there is the same one - glass body, red inside with a black strip. It should be a diode, but what kind of? On mine is written N1 28A - could you tell what is it ? Thanks ahead!

[@observingrogue7652]

Thank you so much. Now how can I convert DC to AC? I want to step up DC voltage, using a transformer, but transformers only work with AC voltage. I'm planning to convert DC voltage from a battery, to AC, so a transformer can increase the voltage. Then, after the transformer, convert that higher voltage AC, to DC, to power a motor. I must also mention, that I will be using a motor controller between the battery and the DC to AC converter. And I hope I can still control the motor like normal, using that setup to increase the voltage to it, from the controller.

[@observingrogue7652]

If you are wondering why I'm going through all of this...I'm building an electric motorcycle. From what I recently learned, connecting batteries together, in series, will combine their voltages, but connecting them in parallel, will combine their amperage. Also, apparently, amps determine how strong the torque of the motor will be, and voltage determines how fast the motor can spin. So I'm planning to connect the batteries in parallel, so I have high amps for torque, and high amp hours, high capacity, for range. And, after the motor controller & batteries, I will use the converters & a transformer, for a higher top speed. I'm not certain on what type of motor I should get. But I'm sure it should be brushless, not only for longevity, but apparently, I can send as much power as I can to a motor, as long as I can keep it from overheating, and the brushes don't start arcing from high voltages. So no brushes will be 1 less problem.

[@observingrogue7652]

I'm basically new to all of this. I hope it works. I'm also concerned about the size & weight of the converters, the transformer, and the controller. Depending on the motorcycle I obtain & the room within its frame, with the motor, my battery setup ranges at least one to three 6V 180AH batteries, or one to four 12V 70AH batteries, or, one to three 12V 100AH Batteries. www.batteriesplus.com/search?facets=Brand:Duracell%20ProCell~Duracell%20Ultra|Capacity:70AH~100AH~180AH&q=Gel+SLA+Batteries

[@briangommage3863]

You need an inverter to convert DC - AC, and a step up boost converter to increase DC voltage. I believe RPM is also determined by (for AC) the frequency (50 or 60Hz). AC motors are generally designed to work for longer periods of time - eg. fans, bench power tools, whereas DC are smaller but louder and only for short periods. Good luck with your project

[@ddegn]

Great video. Thank you.

[@salmantechnologies282]

Thanks Sir better understanding nice thanks again

[@Rob-wl8dy]

Hi there ... thx for the nice videos ... is it possible to put more than 1 thumb up ? Keep up the good work

[@LearningToFly77]

Top Tutorial!!!

[@kianoosh.]

great video !!! what is the the capacitor voltage you use? i heard the voltage spikes after rectification

[@doodben]

Great video !

[@mihkus]

The peak rms voltage 1.414x is only for few nanoseconds normally when device is running he voltage lowers by 0,3x but still, if your device has 18v absolute maxium voltage, dont use 18v ac to run it 12 does it well, after filtering the volate increases by 1,414 no just by useing bridge diode. Once i had to run 30A trough the breadboard at 82v, little flash and it was all gone. Lost 5 bucks!

[@estufa88]

very very useful. thanks

[@dickcheney6]

Any diode can emit light at least once!

[@SchwanaCARDHUT]

Thank you very much I'm from france

[@amirdefreitas3234]

Gonna just binge watch as many vids of yours as I can one day! Afrotechmods: the Carl Sagan of Electrical Engineering! :3 You explain concepts with such simplicity that it's amazing how complicated texts make these things seem! I salute you! Subscribed :)

[@Afrotechmods]

+Amir De Freitas Dawww thanks!

[@RNA0ROGER]

+Afrotechmods Why not use a mosfet rather than a diode?

[@mcdermottpeter]

+Amir De Freitas Agree. I'm finding these videos much more helpful than the beginner texts that I've been reading.

[@raddumas7341]

("RNA0ROGER") o

[@saadhegmssaadhe7661]

ممتاز

[@markistheone]

I so need a scope....

[@jotasgasco]

wayy to expensive stuff. i´m looking forward to ask in my university to keep an old one when they replace them with new ones.

[@fizzicist7678]

The lowest you could get is probably a USB one. You'd probably need to do some tricks to lower the voltages reliably if you deal with high voltage, but usable for low voltage applications and 20MHz bandwidth on the low end. They are not as good as things like a Rigol DS1000 series, but cheap and probably enough to start with.

[@ZakKohler]

Get a used analog scope

[@ZakKohler]

m.youtube.com/watch%3Fv%3DXh9FNRpta9s m.youtube.com/watch%3Fv%3DlZfbo-2sd1A

[@jimmieqkids]

Dude, this was awesome. So simple and to the point. Makes me want to take my old arse back to school.

[@johntube2525]

I am a 71 year old man that cannot hear very well anymore, but you must have taken at least 20 speech class to do this clear and concise presentation. You are truly a gifted person when it comes to talking and presentation. I Love the fact that there is no background, so called music, or any other noise to mess up me hearing someone talk. I truly hope you make more very informative and well planned videos. I have subscribed. Thank you for taking the time to teach us!

[@Afrotechmods]

Thank you! No speech classes, but I do re-read each line 5-6 times until I get something that sounds right.