You are very organized. Makes the explanation of the circuit very clear, very visible. One of the best Electronics channels I've ever seen on KZfaq. And the best ????? Without those horrible songs that take the focus away from the explanation. Very good ! Congratulations !!! 👏👏👏 (from Brazil)

Thank you for being so clear in your instructions: I really appreciate the time and effort you put into this tutorial. Thanks from Australia.

Your teaching style is beautiful. Thank you.🙏❤

Thank you very much for this clear video, Now I understood how my home rechargeable torch light works. I am becoming fan of you. :)

Great! Good explanation about how to select the polyester capacitor based on the required output voltage. Thanks for sharing.

Consumers friendly technological designing are always different from business friendly. So many extra components and complicated designing are good for business.

This is the only video as to how to choose correct particular based on physics calculation.

Sir gi your explain is very Quite Amazing

Thank you for a very good explanation

The AC and DC capacitor name are not clear. Please write with voltage limits.

you have forgotten to add a series resistance with zener diode (current limiting resistance )

The videos was very good and informative, you calculation and description of the components are good. If you can explain the about resistors and their values that would be great.

How did you calculate the value of the bleeder resistor and the 100ohm/2watt resistor in series with the neutral and the value of the smoothing capacitor

Simple, Salvy. An L7806 is more costly than a zener

super bro thank you very much

dangerous . solution was practical when transformers were expensive and big. Now phone chargers are available everywhere.

For those that as of Amp rating, this is in the area of 10 to 50mA, depending of the input cap A 470nF X2 cap gives some 10mA This is not isolated power suplly, it has potential to ground or null in the range of 220V, it can shock or kill if you make a contact whit it

Very cool project...but I really dont know what the function of R3?

Want to try making it

Bro excellent project. I have been requesting you to provide complete project kits (sale) those who wants build the same..

thank you, can we power a microcontroller using this supply

Hi, A good effort of details in your video. It does not show the AC voltage before the bridge and DC voltage after the bridge prior to filter.

This ckt.will certainly give a shock! 100mA output is very high. Actually such high currents should never be drawn from non-isolated sources. Fortunately Triac gating circuts that need 5 voIts on the input side will work very well even at 10 mA! So will be much safer to reduce current! Another trick to make it safer will be to have another capacitor with bleed resistor on the 2nd instead of the 100 ohm resistor! This way both wires on AC side of rectifier will become safe to touch.

Sir, R1 &R2 are 270 k but in video u r telling 220 which is right? U r using one 2w resistance but in in details u have written 1 w what is correct ? Pl explain regards nice tuitor

Explained nice and clearly. Good job.

Excellent explanation

Useful video 👍 very good

can you explain, how you get the value of r1 ,r2, and r3

How can change DC polarity for Motor reverse Forward?

How much maximum current allowed for averall the power supply circuit when we connect to any larger load?instead only LED...how to estimate it?

Many thanks.🇬🇧😷👍

In your calculation, your AC capacitor value to be used is 1uf....but practically you are using the capacitor marked 155 J the value 1.5uf. I think you should be using 105 (1uf) to be exact instead of 155 (1.5uf). I wonder if there are changes in the output voltage at point A if the capacitance of the AC capacitor are changed. Please clarify.

Thank you very much for your video, can I have a question on avoiding of shocking on touching the output: 1. Can we you a phase cut at 5 VAC wave from using Zero cross protection stuff like MOC3021 and a small micro controller, triag to handle the trigger for wave form cut so that the overall voltage will never bee too high? 2. Of course with this, the synchronous wave form will be cut and have some time no power, can we use capacitor/ inductor to supplement the loss of power during the cut of AC wave form?

how can i get 1 amp output current cz i wanna glow 40 rgb leds connected in a parallel

Explained pretty smooth and crystal clear. My question is, what will be the voltage after the 470micro f capacitor (C2)?

What determined the value of C2 and R3?

Good. But the circuit is shock hazard at dc point which is very dengerus..

hey dude does bleeding resitor require any calculations ?

I made it.Awesome Project.Whats the difference between tramsfomerless and transformer powersupply?

Sir plz help transformer less 12v supply my filter capacitor is heatup what reason

Great job I require that C2 ( capacitor value ) Please calculate method & including all formula.. I am waiting

Well explained but text appearing on the video blocks the ckt and components.let the text scroll at the bottom of the video please. B lore.

can we measure the output voltage of transformarless powersupply wihout connected to the load?

All led drivers can have transformerless power supply, but why we don't.

Remove the load n check the output still high voltages only the current very small it will not give any lower voltages except the zener

Hi, can you please tell me what the R3 does, couldn't you connect it directly to the full bridge rectifier and ignore adding it? If you or someone else can shed some light on my question I would be forever grateful.

Sir good morning, no Gerber file in description ?

Good description of a capacitive dropper but too many annoying pop-ups to subscribe, share and comment.

I'm not getting the correct voltage for my 12v .... It's only giving .2v

How to determine the resistor which is connected parallel with this 1uF capacitor??

could you please make a video same for 24dc 10 amps to 12v dc 5amps

Kindly suggest component values to get 48v dc output from 230v ac by using above method.

Witch capastor use for 12 volt

How if i need 24 volt dc?.. could you give the values of all the component?

btw, the impedance seen by the source is the parallel network of the capacitor and the resistor ..

Web site is not clear to order

Please, how much value for bleeder resistance

Not sure how you're reaching the figure of 6v across the input to the bridge rectifier. You're dealing with AC up to the point of the bridge rectifier, so your 6v would rectify to root 2 times that, minus 2x the forward voltage of the diodes you're using in the bridge. That's 8.4v minus 1.2v = 7.2v. dc output of the bridge. This would hammer your zener diode, (which should also have a series resistance to protect it?) I can't see how you can try to use DC voltages on the AC side of the rectifier. It just doesn't make sense to me.

thanks.but i test many times but never cant do this.i use 1 m ohms and 750 nf.i dont want a specefic voltage ,i just want to test but never succeed.i make circuit on bridboard bread board. 😭😭😭😭

If I want 5V, 2 A current DC output without any transformer (with 2 DC capacitor and Inductor) what will be the circuit diagram?

For 150volt dc pls let me know the value of component

Can I use only a resistor to imitate the value of the Impedance? like a resistor with impedance 3192.6?

well done, i have a question regarding the zener, does the zener has current limit?

explain really well, is it possible to power this circuit without a load ? In the video you use a motor as a load.

These capacitor output is not safe, if the input voltage raises to a high voltage, the capacitor might blast. This happened to me twice.

why 100 ohm resistor is used at the AC input and how to determine the filter capcitor uF and voltage rating for the rectifier circuit?

Sir from where you got the printed pcb , I need some pcb

Can you please send me the pcb board link

Please show the calculation for choosing the correct capacitance and voltage value of the filter capacitor .

Do you have circuit in PDF or JPEG format? I want to make pcb at home instead of ordering on online store. In my country, it's expensive.

great instructions, but your formula C= 1/ 2x3.14 x50 x3192.6 = 9.975 (not 0.97). still about 1uF but not accurate or i am still missing something???

Respected Sir If i need 12v output , it is enough to do change the capacitance value.. help me

how to have 2 A in this design?

WOULD GREATLY APPRECIATE IF YOU. COULD MAKE A VIDEO OF LED EMERGENCY LIGHT SIMILAR TO " DP LED " SERIES 'EMERGENCY UNITS THAT ARE AVAILABLE IN MARKETS.

Sir ye 4v batry charger bana sakty hy

How many ampere at 5v sir thank's.

Hi thank you for your video and the time you took in making it. Is it possible to use this type of circuit to drop ac to a lower ac voltage. I have two 220v 30w LED flood lights. I want to reduce the voltage to about 200v for maximum led life. The LED are very bright and I think are being over driven. The units are sealed so I can not get inside them to lower the DC voltage. Is my only option to install a mains dimmer switch? Help, advise please.

Hi, why are you use ac capasitör is 1.5 uf ? You calculate approximative 1 uf.

Where did you get (2x3•14)x50x3912.6

How much is the self consumption of power

I want pcb board with components another one 12v pcb board with component.

Can i use capacitor of 2.2 micro farad instead of 1.4 micro farad?

Thank you for this video. Is R3 really important? Why?

I don't get why you use P-P instead of RMS.

What is the value of bleader resistor

Where can i go to catch up and learn what each one of these devices does?

Where to purchase biard

You had a bunch of different loads in your circuit. Can you please tell us how they are connected to the output? Excellent video, thank you.

Nice

what happens if and when C1 shorts out? 220 thru everything?

This is not the right way....You did not consider the 100 ohm resistor

Why you have used that 2w resistance and how you calculated the resistance value

Hello Sir, Can I able used this circuit for the load of 5V , 500mA...?

Hi! the voltage at point B is much lower than the voltage at point A because the capacitor C1 has no time to completely charge?? If Im right, is not this ciruit dangerous? because if the capacitor breaks, the voltage in the output is too big... (Im not sure if the zener can keep it low)

Can you pls snd gerber file and circuit diagram

What is the value of DC capacitor you have used

Can we use this for esp32?

Why is the output voltage more..... 5.45V when a 5.1V zener diode is used

What is shipping cost of pcb shipping to india?

Eski life kitni hogi agar ese regular supply (24x7 h) ke liye use kare