Friends. in today’s lecture we will learn about the “Transformerless power supply” today i will tell you some secrete formula’s by using these formula’s you can design your own power supply of required current and voltages i already poste a video about “Transformerless power supply” but some friends have doubts abut transformerless power supply i am making this video for clearing those doubts. table of contents of today’s video are as follows. A- Block Diagram in this section we will see the purpose of different blocks. and we will see which components are use in this block and which component is necessary and which is for protection B -we will see some formula’s that you can use for design a power supply of your requirement. C – we will solve an example the example will help you to understand the formula’s D – we will perform an experiment E – and then you can ask your questions in comment section , i will answer you . Did you like this video? and what you learn in this video tell me I am waiting. if you like the video thumb up for me . we will start form block diagram this is the input voltage section and this is the output voltage section. at this point we will apply input voltage and after step-down we will run this load i use an led and current limiting resistor as a load the first component of this block diagram is a series resistor or current limiting resistor the purpose of this resistor is to protect the x-rated capacitor form switching harmonics. if you don’t block these harmonics , this will blow up the x-rated capacitor the x-rated capacitor is the heart of this power supply so we can say the series resistor is the protection of x-rated capacitor we use another resistor in parallel with the capacitor the purpose of this resistor is to provide a reverse path for charges stored in cap. after switch off supply. this resistor is known as Bleeder Resistor after step down the voltage we will use a bridge rectifier the purpose of the bridge rectifier is to convert AC voltage into DC voltages. but the DC voltage form bridge rectifier are not pure DC these are the pulsating DC voltages. for making a pure DC a filter unit is used and here i use a capacitor for filtration. and then we will use a regulator the purpose of regulator is to remove variations which are coming from input. to protect the load form variations. in regulator section we can use zener diode or 78xx series regulator and finally this is our load. this is the simplified block diagram of this power supply. many friends were asking me where is the actual voltage drop occurs in this circuit. the voltages at every point are shown as the input voltage the answer of that question is the voltages at these two points are low but if you will check the voltage between any point of this circuit reference to ground the voltage will be equal to 220 or 230 volts which are the same as suppl volts. according to the question, where is the drop take place ? the answer is so simple the voltage between -ve and +ve lead are low and step down occur between these leads but high or same as the supply voltage , between ground and any lead of this circuit so don’t touch at any part of this circuit in reality the voltage between these two leads are low and i will prove this by running an LED with this circuit . so the purpose of the filter unit is to remove ripple for Smooth DC output at load point. in the next section we will look some formula’s the formula’s in previous video was in detail so many friend was confused so, today i will show you only tow simplified formula’s which you can use to find the value of components. these are the simplified formula’s 1st formula can be use to calculat the impedance and the 2nd one can be used to find the capacitor value. the most important formula is the 2nd one. actually we use these tow formula’s to find the capacitor value. but we need Xc in 2nd formula which we calculte form 1st formula. here the vaue of Z and Xc are same first of all we have rms voltage which are supply voltage if we will say 220 or 230 volts . these are the rms voltages we can’t use these voltage for calculation we will convert rms voltage into peak voltages for peak voltages we will multiply with root 2 in this way rms voltages will convert into peak voltages after that we will subtract the required voltage or load v. and then we will divide this with output current make sure the value of Iout will be in ampare if you have mA then convert them in amp befor putting we will do an example of this in a mint. after calculating the value of z put in 2nd formula and you can check the frequency with frequency meter. and the value of pi is 3.1416 and the answer of this equation will be the value of x-rated capacitor and now we will solve an example here is the required data to solve an example here i chose 5 volt for deriving the led, but the voltages of the led are 3.6 volts . the remaining 1.4 will drop in bridge rectifier now we will put the data in formula. i already show you the formula’s simply put the given data in formula here i convert the mA into Amps. for finding the value of capacitor we will use Z=Xc simply put the data in formula Now we will perform an experiment if you learn something from this video like the video and also share this with your friends press subscribe button and bell icon for new updates give me the feedback in comment section i am waiting your feedback so here is our final circuit for experiment this is the series resistor . i use 560 ohm and 1/2 watt resistor i can’t tell all about this resistor in this video the calculation of this resistor is little difficult . i will make another video about current limiting resistor as soon as possible if you need the calculation of this resistor ask me in comment section for this time use 500 to 560 ohm and 1/2 to 1 watt don’t use less power resistor the capacitor which i use here is the non polar capacitor after that i sue a bridge rectifier and finally i use the led and resistor as a load here i am not using the filter unit and regulator unit because some friends were thinking that the actual voltage drop is because of regulator. i will show you that this circuit will work properly without regulator unit now Switch the Ac supply ON and check the circuit here you can see the led is switched ON please don’t touch any part of this circuit if you will touch it will cause serious injure you can see the led is blinking slowly because the the output of bridge rectifier is not perfect DC to solve this problem use a filter capacitor before load the another problem is the variation of dc supply to fix the output voltage constant use a regulator unit we can use any regulator of 78xx series according to your need you can also use a ziner diode for regulator if you have any doubt about this section ask me in comment section i will make a separate video of this section don’t miss to ask any question share your suggestion about this video what you learn new in this video . if you want to give any suggestion please post in comment section i am waiting you comment and questions

good viedeo

Bhai is circuit se kitne amp ka current le sakte hai hum

if all you want to do is power an led from mains check out big clives video on this subject

Brilliant

Learn new calculation rhanks

thanks

Sir plz Stablizer k circuit k bare me detail bataen k vo kse kam krta h

Thanks sir

My doubts clear

Cap 225j ka lagana hai

Hon.nice explanation.how to find voltage rating value.

Nice and useful video

Sir os suplay me outpot volte hatarnak he ya normal

Nics sir aap ko es video ke liye main ek like dunga

Our mere ye gujaaresh hai

Ke aap eise he video

Banaeye

Masha Allah zbardast teach style

Sir, please explain about different value of nonpolar capacitor usage.and higher ampier power supply through transfermer less power supply.

How to find X rated capacitor out put voltage

Nicevidio

great job bro

What is the exact use of non – polar capacitor used here??

awesome

12v 2amp. ke liye capacitor or rasistance btao

How safe to use x rated capacitor. What's it's life duration.

sir what should i do if my required current is above 10Amps?

please make a video on working of RC circuits

How to calculate filter unit capacitor capacity and other components capacity?

I want to reduce voltage from 220ac to 110ac without transformer. Pls give me the instructions. Because the sound of my analog ding dong calling bell is very high. So I want to connect a circuit that can reduce the voltage.

How to find the value of series and bleeder resistor

ڈائون سٹیپ پاور سپلائ کی وڈیو اچھی ہے۔اسے عملا" استعمال کے لئے اگر 3_6_9_12وولٹ 1 ایمپئر آوٹ پٹ کے لئے کپیسٹر اور رزسٹرز کی ویلیو کا چارٹ مہیا کر دیں تو بہت مفید ثابت ہو سکتا ہے۔یوسف سپرا فیصل آباد

Very well understood, everyone will understand it completely

sir many capacitor ki value calculate kr k us value ka capacitor use kia lakin voltage drop 220 sy 110 tk hogay lakin ac voltage mari calculation ka mutabk 12 volt nhi ary asa kun hora ha

sir 1 issue ha mari calculation k mutabik output volts or amps nhi ary asa kun hora ha

Mày nói nhảm nhiều quá.

sir g agr 12 v or 15 amp chya ho tu ky krna pra ga

How to calculate bleeder nd series resistance??

آسلام علیکم ورحمتہ

مجھے 60 ولٹ کی بیٹری چارج کرنی ھے جو تقریبا جو الیکٹرک بائیک کے استعمال میں ھے ۔اس طرح کا ایکسپیرمنٹ ااس بیٹری کو چارج کر سکے گا ؟؟؟؟

subtitle making disturbens to watch vedio

में आपका नया नया वीडियो बहुत देखता हूँ मैने इनमेसे कई नए प्रोजेक्ट भी बनाएहे हालमेंही मेने 12 LED बोर्ड़ के लिए एक ट्रांसफॉर्मर लेस सर्किट बनाई है इनमे एक प्रॉब्लम है LED ज्यादा होनेके कारण कम जलती है cap 105 250v का डबल करके देखलिया फिरभी 12 v पूरा नही होता जिससे LED थोड़ी डिम रहती है तो PLS आप बताइए 12 V के लिए क्या चेंज करना चाहिए।?

Shukrya

Can I run any amplifier using this circuit

Can i run a 12 v relay on this circuit and also suggest me resistor value for using this for relay… Input supply is 220v ac and i need output of 12 v

How many amps will get

How many amps will get

Ise kahte he ake diagram

Very nice video

Simple and lucid explanation.

Hello, thank you so much for such an amazing tutorial. I need 5v power supply for my NodeMCU (esp8266 based board) with 300mA. I tried using your formula and seems like its giving a value which I am not able to understand how to get that value capacitor here is my formula values I have used.

((230*4)-6.5)/0.5 = 1827

1/( (2*3.1416) * 50 * 1827) = 0.000001742250366

So what capacitor should I use here? As it looks a bit complicated for me to understand why you used "x10^-6".

Please show how to calculate current dropping resistor, that is in series with x rated capacitor

IS IT SAFE TO USE FOR MOBILE CHARGING

Phase va nutal ka dhan

Zeenor Amp KO limit karta ha k nahe

Sir ye formula DC Me kamkarega

Please makes a 40 led power supply design video

Excellent

12v5amp Pawer supplay daigram

sir is trah ke power supply se hm maximumkitne ampere ke supply desighn krskte hen

You R great….

My dear sirji good evening sirji Ian old man but my friend some led bulbs circuits explained in Hindi is slowly sirji God ii hopefully God prayers my life send of your thanks for you

Sir micro farad calcuator karna batao

Ass/alkm firstly. I am very happy to found you. Hopefully i can say my problems will shortout shortly. I watched your YouTube vedio. Your teaching style is very fine and you have lots of materials also to teach. Sorry thora long discussion ho gaya. Thanks

It gives very low current. Can u tell me how to obtain more current 500-1000 ma frm this circuit ?

Mujhe x rated capiciter value bataye 7805 lagana h saath me series resistance bhi bataye plese tell koi video dekhne ke liye mat bolna thk

Sir muje, 10 raise to power -7 kaise aaya or Apne ise -6 me kaise convert kiye, ye nahi samaj aaya, Maine apki calculation manually ki to calculater ke last me e-7 tha means 10 raise to power -7 but meri alag calculation me 10 raise to power -6 AA Raha hai to ise to nahi further calculate karne ki means 10 raise to power – 6 me convert karne ki because it is already in -6

Why are we using peak value of voltage in farmula??

Please make a video on how to calculate that series resistor which is connected to non polar capacitor .

Thank you very much bro. but can u please tell resistor value in watt?? I can calculate ohms as per my requirement but i don't know how many watts resistor and bridge diode(I m using 4* 1n4007) can be calculated.. please tell me..

transforlar less pusre DC kibave pabo

60 volt ac to 30volt ac convert bato

sri 3phase kee transaformare less how to du 2phase 440 volt input .output 18 volt 100ma

Sir, pl.x-rated capa ke aage wala resistor value find par ek video banaiye pl……

Bhaki video jo aapne banaya uske liye daynwad …..excellent explain…bahoot kuch sika

Blender resister ki bat main nahi bataya

السلام علیکم ورحمۃ اللہ! بہت شکریہ پیارے بھائی، بہت اچھی ویڈیو تھی مگر ایک سوال ہے؟؟؟

آپ نے یہ تو بتا دیا کہ کپیسٹر کی کپیسٹینس کیسے معلوم کریں گے مگر ہمیں یہ کیسے پتہ چلے گا کہ کپیسٹر کتنے وولٹ کا لگے گا۔ براہ کرم وضاحت کیجیے۔ شکریہ

sri 3phase kee transaformare less how to du 2phase 440 volt input .output 18 volt 100ma

ok sri

AOA bhai. kindly 12v + 10amp ki power output ka sample bana kr ya sirf components bata den. thnx

The capacitive power supply always needs a zener diode for voltage regulation because is a current device and the output voltage depends from the current consuming.Without a zener and a load being connected the output voltage is 220V.So capacitors will blown along with other components and here its the real dark side danger.It is not isolated from mains and this is well known.

Sir, how to calculate microfarad

Sir tell me the regulator component name and number, filter valve.?

And I need the regulator value as same as in SMD

Bhaijan aap mere liye FTA SET TOP BOX ki power supply ki circuit ka vedio daigram ke sath banaye please bhaijan

Good explain aisa hi lecture resistor pr b banae k transformerless k liye resistor ki value kia ho gi

Awesome bhai resistor ka video banavo

Marvellous

Kisi led ke lie kitna voltage & kitna amp required honge ye kaise pata karna hain?

Sir how to find series resistor, parallel resistor value and filter capacitor value thanks for this valuable information

sir can you provide formula if we add a ntc resistor for inrush current

Good video

Sir please series resistor ka value 560 ohm kaisay aap nay calculation kiya hay woos par thora bataye ye…. aur parallel resister (for discharge) ka value 1 mega ohm ka bhi calculation batayega please : )

What should be done to get 12 v and 2amp at the output?

Why usr the resistor in output led

Hi…very good video…can 48VDC 300mA or 150mA output be designed using the same formulas ? Thank you

Is this a constant current supply sir

Are you sure

Sir can I connect 10 1 watt LED in this circuit

After using a capacitor can I touch the led terminals reply me fast plzzzzz

masla ye ha k capacitor jaldi discharge ni hota aur electric shock lagta ha

Mera math kamjor hai lekin aapne bahut acha samjhaya

the value of capacitor in joules how to to convert it in farad

Thank you sir

Aap k ye lecture mera sare doubt clear kar di….😋😍😍😍😍😍😍😘😘😘😘😘

Good information

Superb video, every thing is clear. Thanks.

Good bro very good

Bhai formulas Ka use be karna sikya bhai