Instructables
Note :- THIS INSTRUTABLE SHOULD NOT BE ATTEMPTED UNLESS YOU ARE 
FAMILIAR WITH THE RISKS OF WORKING WITH MAINS VOLTAGE



To make this project you will need only few components.
And you could make your own led lamp or decorating light and many more things that you can imagine. This project is just an example to how to build the circuit for glowing led's using 220-250v.
 
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Step 1: Components Required.

Picture of Components Required.
>Led's (number as ur choice)
> 4007 Diode (4).
> 250v Polyfilm Capacitor (1) .
> 50v (100 uf) Capacitor (1).
> 1000 m ohm Resistor (1).
> 0.220 k ohm Resistor { should be big in size else the curcit would not work }  (1). or something near this value. 

Step 2: Adding diodes.

IMG_0008.jpg
IMG_0007.jpg

Place the diodes on the PCB board as shown in the picture.
and follow the image instructions.

 

Step 3: Adding Resistors.

1st add the 1000 m hm resistor.

Step 4: Adding the LED's.

Picture of Adding the LED's.


I added up only 3 leds. You could add more leds as your requirment.
The current flow would be automaticly divided or multiply itself as required. 

Step 6: Implementation.

Using this circuit i created.

>Led Lamp.
>Led Decorative Lights.

You could construct something else using this circuit.
Use Your Brains and start working on it..
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jone0051 month ago

How to 300 picces 3V led connect To AC current (220-250V)

Please anyone help me. My E-mail: jone005@gmail.com

jone0051 month ago

How to 300 picces 3V led connect To AC current (220-250V)

sogseal4 months ago

This is a perfect project for me! my buddy gave me his oscilloscope, and i havent used it yet, so its a win win for me ! Thanks bud

Hi Sahil, with all respect, why using full rectifying? You use more components and series resistor dissipates 4 times the energy (heating).

An half wave rectifying (just one diode) would do the same job with less components and dissipating 1/4 of the energy !!!

Best regards, Arnoldo.

nvaishnav7 months ago
Kindly note R1= 1M ohm ( or 1000 k ohm ) and not 1000 M ohm!
gollu1 year ago
sir, i need 2 connect 5 different colour 3v leds in series. it should glow like flickering iam gng 2 use for decrotive purpose..plz gve a example circuit as soon as possible....
despond1 year ago
*IMPORTANT*
The comments here are full of dangerous errors and confusion.
An AC mains mistake can *KILL* you or someone else.

Read this page, which explains the theory properly:

http://www.marcspages.co.uk/tech/6103.htm
pro52002 years ago
Can I use this scheme, for 16 pieces LED?
u used only 2k2 1w Resistor (6) and Diode 4007 (4)
25LED

220v and 240v only
OK, i don't know how much value farad the polyfilm capasitor ?
google the 474j...part written on it and you should get a value
how to calculate wattage of a resistor
e.g 200 ohm 1/2 watt etc what is it's formula
hello there
does diode used as bridge can u tell me what is its purpose
sahil263 (author)  chnaveed.alam2 years ago
hi there,

read this

http://en.wikipedia.org/wiki/Bridge_rectifier
thanks frnd
samalert2 years ago
Very Glad !!!! that u made such a wonderful thing. I was searching for this since i didn't want an adapter hanging from above over ceiling, this will help me a lot.... but i have some doubts.
1> output is 50v - so parallel connection not possible since single LED will carry only 3v [ now since 50 v if i try to connect 16 LEDs in series it shud suffice isnt it 3x16 = 48v] then why in some comments below it is 25 - 30 LED ?
2> if i want to decrease the voltage from 50v to like 12v or less what can be altered and to what amout (since am not into electronics and have least knowledge with not even the basic knowledge of multimeter) if you can suggest the amount and which part i would be glad
3> in your picture above i have seen you have just used 3 leds hw are those able to handle 50v o/p.
4> Now as u specified that circuitry gets a little hot now till how much time can this be left ON.

Tnx a ton for lending time and responding .
This prj is one of my favourite.
seaspac2 years ago
Dear Sahil I think you dont know any thing about the circuit, and in many questions you have been misleading the people. I can see the values of the resistors from the color codes in the photos those are R1=1 Mega ohm - 1/4 Watt and R2= 220 Ohm 1 watt. while you said in a post that resistor R1 is 1000 Milli Ohm, and the big resistor is 0.218 Killo Ohm.

I will repeat the parts list agin for clearity R1 = 1 Mega Ohm 1/4 Watt, R2 = 220 Ohm 1 Watt, Capacitor in parrallel to R1= 0.47 Microfarad 450V, Diodes = 1N4007, Capacitor after the bridge is 100 Microfarad 50V.

Its a nice circuit but lot of confusion from your side about it.
kushalverma2 years ago
i'm not getting a resistor of value 0.218/0.220 excluding this i've got everything now what should i do plz rply me fast as u can.....
KUSHAL
sahil263 (author)  kushalverma2 years ago
hello there,

The resistors are mandatory for this Project.
You Cannot Build the project without the Resistors.
0.220 k ohm Resistor is 1/2watt or 1/4 ?

i thk its 1/2watt

mkrieg2 years ago
How nice to bring to light these LEDs!
This is music to my electronics - ears.
If you fear the risk of an electric shock, my advice is to simply use ready LED lights!
Here at home I for example use led spots from LEDoptix;-)
sahil263 (author)  mkrieg2 years ago
Thank's for the suggestion.
btmnet2 years ago
Hi, can i use different led like red colour and blue colour?
sahil263 (author)  btmnet2 years ago
Hi,
Ya sure you can use red and blue led's.
kushalverma2 years ago
Hi Sahil i'm not getting the resistor of value 0.220 k ohm what should i do now plz help me it's very imp... plz help plzz....
ijibang3 years ago
Thank you for sharing your project.
I intend to make several pieces of 4 LED's as night lights.
Could I ask your help to reconfirm the resistor value (both of them). Also why must you use 50V 100uF capacitor ? Does it mean that you can connect 1 to 17 LED's assuming they are 3V 20mA each?
One last thing, can the LED's be connected in parallel? Advantage/Disadvantage?

Thank you very very much dude!
sahil263 (author)  ijibang3 years ago
@ Ijibang, I am very sorry for a late reply.

the bigger resistor is of value 0.218 k ohm (note that when you purchase this resistor it should be big is size than normal resistors).

the 2nd resistor is of value 1000 mili ohm

you can use capacitor according your requirement of the LED's, as you have calculated.

and lastly i would not recommend you to connect the LED's in parallel (disadvantage).
msaeed3 years ago
And One more thing...
You said its output Dc voltage depends upon the orange capacitor...
How ? if we use a 50 v capacitor then, would its voltage be 50 v..? or so?
sahil263 (author)  msaeed3 years ago
Msaeed, if we use 50v capacitor the output won't be 50v, but it would be some were around below 50v.
msaeed3 years ago
Sory Sahil but i can't understand the resistor values.... is that 1000 mili ohms? or is it 1000 mega ohms...? i m new with these things.... Plz help ,
Regards.
sahil263 (author)  msaeed3 years ago
Msaeed, the resistor's value is 1000 mili ohms.
sonyslave23 years ago
does it put off any heat?
sahil263 (author)  sonyslave23 years ago
yes it dose gets little bit hot. but not to very.
Yusufi4 years ago
Your project is very nice guiding,but I have little confusion that maximum how many numbers of LED we can use.....?
sahil263 (author)  Yusufi3 years ago
thanks for your comment......
you could use approx. 30 led's
depending upon which led's you use...
Ned Kelly4 years ago
Hi your resistor values are 220 ohms   Ie red red brown and the other is a  1 megohm Brown black green , Go for it young un  good trying from an old 80 year old technichian
Actually, if you look closely, there is a grey band between the two reds, and a gold one after the silver band. however, he is still off, I believe.
My Question is, How can we Attach Chargeble Battery (4.V) with this circuit,

actully I have made one lamp base upon the above mentioned circuit, i want

to make this lamp chargeable.
siddhansh914 years ago
what is d output DC voltage of this circuit?
can anyone help me?
sahil263 (author)  siddhansh914 years ago
The DC output depends on the orange cap i.e. 50V(100uf) in this project. You could change the cap according to your requirement. But the uf value should remain same i.e. 100uf 
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