حسیب بھائی جان السلام علیکم جی کیسے ہیں آپ امید کرتی ہوں آپ ٹھیک ہونگے جہاں بھی رہیں خوش رہیں ہم ہمیشہ آپ کیلئے دعا کریں گے اللّه پاک آپ کو بہت کامیابی دے اور صدا سلامت رکھے آمین
Sir thank you for the informative video. I have just started learning. I roughly understand what you have said. My question is why did you put a zener diode? I see that you have already placed a Resistor to drop the voltage to 24v. So based on my little knowledge, the resistor will become break when it goes beyond the 24v.
So what drops all the volts is the series resistor and not the zener itself. This is a nice circuit to use in DIY projects. Nice explanation as always. Thank you! 😊
Hi, sir i would like to ask you about this : could we substitute ss8050 & ss8550 to s8050 & s8550 and vise versa because we can't find the same transistor code.....?
وعليكم السلام ورحمه الله وبركاته Thank you brother Haseeb for the good info. I was just wondering how can we replace a Zener diode with a 5v regulator for example. Will be there a common Ground GND?
yes we can, but in this condition IC cannot determine UVLO thersholds, so it will not able to able to adjust duty cycle properly and the protection will not work moreover if it is used for permanent work, it will consume current above 20mAmp, so it will dissipate power all the time, then you have to select high wattage resistance and the soft start will not work, the ic will start in quick mode, that will decrease the converter's life and the power rail components will expire soon due to frequent surges
Don’t you also need about 21mA through the Zener that is required by the Zener to keep it’s voltage regulation? If so, wouldn’t that require a current of about 31 mA through the resistor?
Sir, I want to ask about again atx smps power supply, yesterday green cable show me 0,44 volt, today I see green cable show me 3.10 volt and purple cable show me 5.1 volt but the power supply no work, no start, why? and where is the problem? Do you have any idea? Thank you.
If a simple resistor would be used in place of the zener, then a voltage divider needs to be calculated taking the paralleled load (the connected IC) into account. As the load current (in function of time) is not a constant, this would generate a non constant and load dependent changing voltage
Thanks for the video But you calculated resistor for 10mA current Ir, then again the current will divide Iz and Iload (Ir=Iz+Iload), then load will not get 10mA current (Iload=Ir-Iz), right..???
Sir, thanks for enhancing my circuit design knowledge as wel as understanding fault finding techniques in various circuits. Pls share phine no. I want to thak u verbally.
![[396] 400V to 24V SMPS Circuit Reference Design](http://i.ytimg.com/vi/K9v1PzaBA5I/mqdefault.jpg)
![[396] 400V to 24V SMPS Circuit Reference Design](/img/tr.png)
zabrdast working
🙏आपकी शिक्षा से शिख कर बहुत खुष है 🙏
best regards and special thanks
My only trust account ,when I want to learn power supply troubleshooting and design , thanks a lot sir ,thumbs up ....
Fantastic work
Like from 🇸🇦
May Allah Pak bless you always
Interesting and great explanation
thanks a lot
Nice sharing 🌷
Super vlogs 🌷
Keep it up 🌷
Good luck 👌🏻🌷🇮🇹
حسیب بھائی جان السلام علیکم جی کیسے ہیں آپ امید کرتی ہوں آپ ٹھیک ہونگے جہاں بھی رہیں خوش رہیں ہم ہمیشہ آپ کیلئے دعا کریں گے اللّه پاک آپ کو بہت کامیابی دے اور صدا سلامت رکھے آمین
nyc sharing haseeb bhai
Very useful information on zener regulators calculation. Thanks sir.
You are most welcome
Thx ,, great videos and clear and easy to understand Mr
MASHA ALLAH another superb superb vlog, liked it, thanks for sharing, stay blessed, KAUP STUDIO
Very informative. Pls make vedeo on smps output capacitor calculations. Because u can explain Theoretically and practically. Thank u God bless you,
Very beautiful and smart my brother 😍 give you big 👍 keep safe
Big thanks
Perfect timing. Great explination as always
Great haseeb sir
May you live long!
Sir thank you for the informative video. I have just started learning. I roughly understand what you have said. My question is why did you put a zener diode? I see that you have already placed a Resistor to drop the voltage to 24v. So based on my little knowledge, the resistor will become break when it goes beyond the 24v.
Think you so much sir. Can you please explain the transforless circuit. شكرا لك استاذي الفاضل حسيب على معلوماتك القيمة
Excellent knowledge sharing.
thanks a lot
Mashallah nice sharing
Fantastic job dear friend/!!
Wonderful, well explained.
nice job dear bro thanks for sharing
stay blessed
Excellent and educative tutorial...
So nice and educative sir may ALLAH bless you
best regards
Hi friend i'm here again. Great sharing. Big like 👍🏻 Stay safe!. See you around.
Sir, very nice video. You are great.
Thanks and welcome
Salaam Janab Bhai Sahib
Lk 16 👏👏👏👍👍
thanks a lot
Very useful information sir thanks for sharing this knowledge to us
best regards
Thanks for sharing good knowledge my friend thanks welcome please God bless you
An important one sir.
best regards
Superb job big thumbs up thanks for sharing good job best regards
Best sharing
very informative...thanks...keep safe
thanks a lot
So what drops all the volts is the series resistor and not the zener itself. This is a nice circuit to use in DIY projects. Nice explanation as always. Thank you! 😊
Hi, sir i would like to ask you about this : could we substitute ss8050 & ss8550 to s8050 & s8550 and vise versa because we can't find the same transistor code.....?
thank you sir for the explanation
You are most welcome
w salam bhai two lk
Yes it is informative video
الحمد للہ
Excellent! Thank you.
You are welcome!
Very useful video
thanks a lot
وعليكم السلام ورحمه الله وبركاته
Thank you brother Haseeb for the good info. I was just wondering how can we replace a Zener diode with a 5v regulator for example. Will be there a common Ground GND?
Explanation is always beyond expectations 👍.Sir I have sent you a small circuit diagram on your WhatsApp, to clear my doubts, please do needful.
Sir, the 10ma going through the load. How can you assume it is going through the zenor diode?
it works as shunt regulator, it regulates the voltage across its junction, the load current is considered as zener current
Excellent thanks for sharing this information
All The Best
Hi.
I believe that R must be:
R = (V - Vz) / (Iz + I load)
because both the Zener diode and load are draining current via R.
Am I correct?
Tank you ! Can I use this type of circuit to supply vcc permanently to an IC, like uc3842, not just for start up?
yes we can, but in this condition IC cannot determine UVLO thersholds, so it will not able to able to adjust duty cycle properly
and the protection will not work
moreover if it is used for permanent work, it will consume current above 20mAmp, so it will dissipate power all the time, then you have to select high wattage resistance
and
the soft start will not work, the ic will start in quick mode, that will decrease the converter's life
and the power rail components will expire soon due to frequent surges
@@HaseebElectronics My sincerest thankful; extremelly good and technical explanation.
@@ministeriomundialliberando8403 you are welcome dear
Don’t you also need about 21mA through the Zener that is required by the Zener to keep it’s voltage regulation? If so, wouldn’t that require a current of about 31 mA through the resistor?
first we need to know the knee current of zener and required current
finally we can select the zener as per our requirement
@@HaseebElectronics Thank you for taking the time to respond to the many questions you get. You are a real gentleman.
Sir, I want to ask about again atx smps power supply, yesterday green cable show me 0,44 volt, today I see green cable show me 3.10 volt and purple cable show me 5.1 volt but the power supply no work, no start, why? and where is the problem? Do you have any idea?
Thank you.
good tutorial sir ,which app are you using for caliculator ?
it is Hyper Scientific Calculator fro google playstore
Hello, does it become a voltage divider ? why a zener and not a simple resistor ?
If a simple resistor would be used in place of the zener, then a voltage divider needs to be calculated taking the paralleled load (the connected IC) into account. As the load current (in function of time) is not a constant, this would generate a non constant and load dependent changing voltage
Thank you very much
You are welcome
next video is also coming for you
Thanks good video
thanks a lot
Good sir
thanks a lot
Nice haseeb.
Are you professor?
Prof.Er.Arun-India
welcome sir
it is my pleasure that a Professor is here on my video.
i am avionics engr.
please accept my best regards
@@HaseebElectronics The concept of "Engineers makes the world" becomes real such like you best youtubers.
Wow super
Pls how to calculate 2 resistors in parallel to no the value codes
Thanks sir I understand
Thanks
Awesome 👍👍👍
Thanks....sir ji....
Good
So nice
Nice sir
Very good very nice
Thanks for the video
But you calculated resistor for 10mA current Ir, then again the current will divide Iz and Iload (Ir=Iz+Iload), then load will not get 10mA current (Iload=Ir-Iz), right..???
you are right,
it is a continuation video to video number 386, to calculate startup resistor and its next video is 403 for loading effect
because i try to address the questions of my viewers and i reply their questions in form of video
Thanking you ❤
Sir, thanks for enhancing my circuit design knowledge as wel as understanding fault finding techniques in various circuits. Pls share phine no. I want to thak u verbally.
In this circuit what is the use of capacitor please explain me sir
The capacitor is there to keep the output voltage stabilized.
🙏🏻👍
sir iss lecture main app nay capacitor ki rating calculate nahi ki. capacitor kitnay volt aur uf ka hona chahiye?
okay dear, i will try to do that as soon as possible
Sir u r greeat
best regards
Thank you
You're welcome
Nice
احلى لايك 👍 بالتوفيق يارب
نشرت جديد ياريت يدوم التواصل
Thanks bro
Welcome
👌👌👌👍
Best regards
Asalm aliykum sir
best regards
Capacitor calculation?