Power Zener Diodes as Voltage Regulators - Circuit Analysis & Efficiency

This electronics video tutorial provides a basic introduction into power zener diodes and it explains how to use them as voltage regulators. It provides a full circuit analysis on the relationship of the zener voltage and the amount of electric current flowing through the diode. It also shows how the zener diode can maintain a stable output voltage when the voltage of the power source varies. In addition, it explains how to load resistance affects the performance of the zener diode. Finally, this video explains how calculate the value of the current limiting resistor to yield maximum efficient by the external circuit.
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[@TheOrganicChemistryTutor]

Final Exams and Video Playlists: www.video-tutor.net/

[@bernardduodu5692]

He just takes his time to simplify the concept, even when it's complex. I'm really happy having such a good teacher

[@fatred777]

One of the best Zener diode videos ive run across in 10 years

[@rodericksibelius8472]

You are A Scholar, one of the Greatest Instructors of Applied Mathematical Engineering Physics in the WORLD. The Ivy league Engineering, Physics Instructors, Professors use 'obfuscation/confusion' through writing ideal theoretical equations on books and writing cryptic formulas on whiteboards, blackboards. Thank You for all these videos.

[@bombslab]

I don't know why I haven't said it sooner but THANK YOU! Your videos have helped me immensely so many times in the last 2 years. I don't want to bash any of my teachers but some are not easy for me to follow. You are so incredibly clear and concise. The part that you added at the end (about power consumption) really helped me wrap my head around how zeners work.

[@bot7070]

Everytime I search something be it advanced maths - statistics - elec stuff - chem you seem to have it all. i applaud you good sir

[@chitsaegvjide]

How does he learn all those things and explain to us? It’s just amazing

[@Bravo_L]

I wanna know how he knows so fucking much lol hes a genius

[@Undertakerfan700]

Bachelor or master in engineering

[@zeerakasim6316]

@@Undertakerfan700 My hard guess is either a masters or phD in electrical engineering? But then idek lol

[@drlnvl8133]

@@Bravo_L I bet the organic chemistry turor loves science and math. That's why he doesn't get tired studying it haha. Unlike me lmaoo

[@justforkicks192]

I want to know the same thing he's a walking calculator

[@MadlyMusick]

Hello sir, all your videos are really helpful. Didn't know how easy physics is until I came across your channel. Everything just gets inside my head when I watch your videos. You are really a great teacher. Your explanation is so clear and I am confidently able to any sum. I just don't know how to show my gratitude so thought of typing this thanks a million. 😀😀😀

[@WistrelChianti]

seconded!

[@sylvesternicoh3455]

Very helpful Sir, thanks.

[@JoeMcLutz]

Outstanding explanation of how zener diods works! Thanks a lot! 👍🏻👍🏻

[@hakanozturk7442]

The explanation is perfect and clear. Thank you for the video which solves many problems in my mind.

[@DominiqueA63]

Thank you so much i love watching and learning from your tutorials, i like the way you clearly explain everything,

[@e.seighart607]

Absolutely amazing explanation. Thank you so much for this wonderful video I learned so much!

[@ricardosanchez1638]

Best presentation I have seen. Keep it simple works best. Great Job Sir!

[@successthruknowledge]

Great video. It really helped me to understand the relationships between current, voltage, resistance and the zener diode. It answered some questions of mine about the voltage near the zener diode and about load resistors.

[@Forexmotivationss]

To be honest, This man is a legend!

[@sureshlala4525]

Nice educational description of a zener diode, I managed to lower 16v to 5 volt for a bluetooth module on my preamplifier, cheers.

[@tomheeks2830]

Thanks. just came across your channel. Some very useful learning resources 👍

[@serpih]

Finalement, une explication claire! Merci!

[@louco2]

Thank you so much for making these videos! Learned a lot!

[@tameezdevos8868]

The best zener video ever!

[@wchfg4187]

Clear explanation! Thank you! Subscribed

[@wsnippets]

Thank you Sir : Love from Sri Lanka 🇱🇰

[@Galaktica74]

Cant give you enough thanks until each one of us subscribe and like all your videos even those which we didnt watch ❤

[@sumitkamble7923]

Thank you it was really helpful 👍🏻

[@SeyavashBit]

Thanks for efficient lecture 🙏

[@sultanahmed9694]

Amazing you are a pro teacher thanks

[@Festus2022]

Priceless video.

[@myspace2502]

Awsome explanation

[@DiegoGomez-pk5tg]

Thanks for the diode name!

[@j.j.b.13]

Thank you so much!!!

[@MaxTornado61]

Great Video.....👍👍👍

[@zuhairalsaffar7001]

Sir thank you so much for your help ❤ 🙏 😊

[@theoryandapplication7197]

thank you for sharing

[@Joyce-ym8te]

THANK U THANK U AND THANK U AGAIN!!

[@joew1865]

I was taught that the correct term is "potential divider" rather than "voltage divider". However, I think my teacher was really just splitting hairs because everyone calls them "voltage divider" all over the interweb. Good video 👍

[@B1NT0N]

It's the same thing. Voltage is just a short for the difference between 2 potential voltages

[@Rev22-21]

My Major was Electronic Instrumentation some thirty years ago and I learned this among many other things. What I had forgotten since then ....this video brought back to recall. Good job. But what I didn't realize were the currents between RS and RL would be different during its op; somehow that just doesn't seem right. When the Zener falls (drops) out RS & RL current is the same....am I not correct?

[@DeDustMet]

at 16:10 he was mean R(L) decrease rather than increase. This way it make sense according with data from the chart

[@inj1979]

Thank you 🍒

[@pooisernest]

I’m not in college anymore, but if I found his videos in college.. I probably would have cried and laughed spontaneously.

[@kingsleyazubuikeabonyi3612]

I love you man. thanks

[@antonita12340]

thank you!!!!

[@logandihel]

Great video, really informative, but you have a mistake when calculating efficiency. With Rs = 1k and RL = 747 ohms, Rs dissipates 15.92 Watts, while the RL dissipates 12 Watts. While it is true that your Zener diode did not lose any power, your overall efficiency is just 43%, since the load only consumed 43% of the total power into the system.

[@SaturnAR]

I'm sorry but you're also wrong. P=VxI PRs=VRs x IRs= 15.92V x 0.01592A= 0.2534W. PRl= VRl x IRl= 12V x 0.01592A= 0.191W. Circuit total consumption is: V x I = 27.92 x 0.01592A = 0.444W from witch 0.2534W is lost at voltage regulation resistor; so circuit efficiency is 43%, yes.

[@NemerFarazdak]

Amazing

[@whatifology_official]

Thanks 😘

[@alimarowah2734]

Thanks

[@MohamadAli-xd5gs]

I hope you will contuine to post helpful videos

[@jaketuttleby9920]

Great video, however is there one where RL is a variable resistor and explains how current or voltage may cause change throughout the circuit when added or removed

[@josephdada8434]

Thank you very much, in fact your explanation in this video really helped me. Please can you help me with this question: Without a step down transformer, I rectified 220 AC voltage to 8 DC Voltage using voltage divider and I wanted to use 5 v Zener diode to regulate the 8v, I have tried all connections (I mean circuit) but its not giving me the 5 v, Please why is it so and does it mean I cannot use a Zener diode with such voltage divider? I will be grateful for your response on this

[@josianemartinez6062]

Check the last comment about using the higher RL value to choose an ideal Rs. If the RL drops, the zener will stop regulating. Otherwise, great video.

[@alexandersolon6548]

Sir, I have a question on 16:02 you said that as the "R(load) Increased it began to draw more current from the ckt, and theres less avalable current to flow from the zener diode." shouldn't it be as the Rl decreased, it will draw more current since it would take the path of least resistance.

[@vashtalelq]

You are correct, when you say the load increases you refer to the current not the resistance, so when the load increases it means that it draws more current, so Rl should be less, Rl is refered to as the load resistance.

[@alexandersolon6548]

@@vashtalelq thanks for the clarification

[@maxpolaris99]

now my head is swimming with impedance matching for maximum power transfer ,Thevenizing transformer impedance reflection ! Oh no! 🤪🤪It's been 40 years since I studied this stuff!

[@jasonmiller6424]

Can you leave a link for the Zener you used? Thanks

[@syntaxerror2409]

Hi, need an immediate response, is there any way or is it possible for us to limit or store the energy loss that from this regulator??

[@alibatebi2161]

thanks for very informing video. how did you get the Vout of (12..05 or 12.03)v. .

[@fromexoplanet21]

Our lord and saviour 🙏 thank youuuuuu💖💖

[@j0mell0]

@ 28:16 this assumes that the breakdown voltage of the zener diode is exactly at 0mA for regulation , which is not true in reality since there has to be some leakage current and minimum current(I min) to "turn on" the zener diode as a regulator. Therefore at 0mA, it's a voltage divider circuit that's regulating 12V, so the actual % efficiency is really the heat dissipated from Rs relative to the heat dissipated from RL(assuming heat from RL is for useful work to external load). P(Rs) = I^2 * Rs P(RL) = I^2 * RL % efficiency = RL/Rs ≈ 75% efficiency

[@johnnykirkpatrick1707]

I am having issues with problems i am facing I am asked to find the value of RS in order to find values of other components in the circuit but i am only given source voltage the Zener Voltage and wattage and the Load resistance how would I find these values of RS

[@vahagnmelikyan2906]

How can the output voltage stay the same? Wouldn't it just bypass the z diode? Is a diode acting as a traffic stopper? Like the speed limit is 10mph(voltage) for z diode and even if the output voltage was supposed to be the voltage of the battery the electrones cannot pass through the wire with higher speed, because diode 10mph speed slows them down?

[@calebsaheb3159]

what is the maximum input voltage for safe operation of zener diode?

[@pareshchauhan6127]

a ver good explanation video. For the selection Rl resistor if my input supply is not constant i.e solar panel is connected to the output then the value of my resistor will keep on changing. my max voltage through solar panel is 22.3 V and i am using a 3.3 V zener diode as i require voltage of 3.3 V to the mosfet for my application through phototransistor. can any one help me with this

[@jjunboxing000]

How exactly do you calculate Vout? Because im trying to do this with a Vin of 16v

[@alangriff1]

So if Im using a battery of less than 12v I dont require a Zener diode or any diode in the circuit?

[@mastershooter64]

organic chem i dont understand the graph of x! can you please make a video on the graph of x!???? plz also how exactly does a zener diode work? and will it still work if the input voltage is like 3k but it was designed to limit voltage to 1v?

[@matematikadanfisikaterapan1344]

In the real world Volt and ampere of R-load is Fix, and Zd is have impedance (For 12 Volt, Impedace = +/- 5 Ohm), and Zd have tolerance to accept i, as max power allowed ( for this, +/ - 0.25 watt), P = (id²).z., thus id not must be zero ampere. Hence the variable that must be arranged is Vs (batteray), and Rs can random fixed as product suggested. When Vs is also must be fixed than we can use comparing- op amp and bjt (or even mosfed) beside diode Zener.

[@hadisalimi8478]

If the (Rs) resistor's power consumption it taken account the output power percentage would be roughly 16%. it's so inefficient. Also I figured out that the internal resistor of the source is about 290 ohms which again has decreased the output power. (on 26':26")

[@wolfgangboettcher3126]

Der wiederstand ist zu klein fuer die belastung

[@nathanieljames7462]

Pretty good. Last point on design was ass backwards as you would want to design for the lower load resistance which will draw more than a higher one but no big deal. I despise whole number names being used to describe decimal values though. 12.15 is NOT twelve point fifteen. It's twelve point one five. Still. Decent video.

[@michaelmounts1269]

👍👍👍

[@ahmedelhadidy4768]

30:35 you should go with lower value of RL I think !!!!!???

[@Axel-jv8wb]

Is diode zener "suck" that voltage. I mean where the remaining voltage go?

[@Lime-ne3fd]

achraf into the series resistor

[@tomheeks2830]

I think the energy is just dissipated as heat i.e wasted. Hence the bit about efficiency at the end.

[@nicholaspitti8171]

10:40 15:10 17:50 19:10

[@ample982]

11:30 15:35

[@lattehour]

how did i landed here ... obviously not all zener diodes are the same to put it simple (not totally right) they are dependent on the area of the junction and the voltage is a weak function of current usually a logarithmic one with slight adjustments that it what makes a diode a diode

[@Theprasadraj]

Ac or dc

[@dimuthupraboda]

12:23

[@atambaasiimwe9618]

how can someone know this much😂😂😂😂😂 he must be related to isaac newton

[@wolfgangboettcher3126]

Nein Song

[@shaistabadar3529]

Apka electric oqatay is nizam pa fail hain 10 15 sal ma apko sab kuch mil jai ga