This is a “SPIRAL LED CHANDELIER” with 240 LED’s working on AC current.

It looks very decent when you switch off all the room lights at night.

Gives a soft light throughout the room and you can use it while watching TV.

Hang it in the Dining room and have a candle light dinner.

This is a sister model of my instructables “LED CHANDELIER” posted earlier.

Step 1: STEP-1

Picture of STEP-1
Take a piece of Mild Steel wire of 1/8 inch diameter and 12 to 14 feet long.

Wind the wire into a spiral with a hook at the top.

This is used as a support for the LED Necklace and the Transformer.

See the Photograph for guidance.
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satpathi1 year ago

Multiplying Factor of 1.4 used in STEP 2 is for AC. Is the same Multiplying factor of 1.4 applicable for DC supply? Satpathi

Dipankar (author)  satpathi1 year ago

Multiplying Factor of 1.4 used in STEP 2 is for AC. Transformer to find out the numbers of LED to be used in one segment.

For DC you do NOT need to do this because you already know the DC voltage, so divide the LED voltage 3.5 by the DC voltage and you get the number of LED per segment....

Dipankar (author)  satpathi1 year ago

Multiplying Factor of 1.4 used in STEP 2 is for AC. Transformer to find out the numbers of LED to be used in one segment.

For DC you do NOT need to do this because you already know the DC voltage, so divide the LED voltage 3.5 by the DC voltage and you get the number of LED per segment....

hambo852 years ago
This is awesome, man! Good job!
Dipankar (author)  hambo852 years ago
Thanks Pal..........
Dipankar (author)  hambo852 years ago
Thanks Pal..........
agis683 years ago
wow...this is really epic....my wife gonna love it for the dinning room....if I ever have the patience to make something like this....
TOCO4 years ago
This thing is epic. But I dont think my parents would let me put this up anywhere if I built it. Well, my mom was looking for a new lighting fixture for our dining room. Nah, she still wouldnt.
Dipankar (author)  TOCO4 years ago
Tell your parents that this is a VERY SAFE Project as it runs on only 12 volts.
Getting Shocked Dose not arise.
TOCO Dipankar4 years ago
Oh, Im not worried about that. I just dont know where to put it if I built it. I have worked on plenty of dangerous things before. I dont have anywhere close to an outlet either. for some reason my house has a lack of electrical outlets by my standards. Im sure that it probably has more than most houses.
siddhanth5 years ago
 yaar deepankar how have you joined the leds in zigzag motion?

kucch aur use kiya hain kya uske saath or bas directly 2 leds ko unke connectors ko ek saath solder kar dia hain?

chandelier accha hain.. but din me utna hi bhadda hain :) well how uses it during the day anyways.. accha project hain.. will be making soon as i finish up with my aieee... but usme ill put alternate color leds :)
Dipankar (author)  siddhanth5 years ago
Step 3 ka photo dekho,
Hum ne perforated hardboard ka use keya hai jo LED ka support deiya hai soldering ke leya.
LED ko hole me dal do, phir uska legs ko bend karo aur solder karo.
haaaa haaaa haaaaa
L..D ko hole me dal do, phir uska legs ko bend karo aur solder karo.
Dipankar (author)  handyman3334 years ago
Hole mein dalna is very easy nahain?
 samajh gaya.. accha hain.. dhanyawaad.. sab log spanish etc me baat kar rahe the.. toh maine socha kyoun na main bi apni matra bhasha ka prayog karu idhar :-)
Dipankar (author)  siddhanth5 years ago
Tum ne bedi samajdari ke baat ke.
Main Bangla, Hindi aur Oriya ma bhe baat kar sakta huin.
 aami o baangla bujhte paari :-) aami aulpo aulpo kore bolte o pari..
Dipankar (author)  siddhanth5 years ago
daleme15 years ago
Nice project and just keep having fun.
rimar20005 years ago
Interesting design, Dipankar.

LEDs are something which I have not yet dared to face.
Every time I tried to do something with them, I burned several, so that's why I fear them
Dipankar (author)  rimar20005 years ago
Do not worry I will send you some lessons in LED and you can do it.
It is very easy once you understand the concept.
redote Dipankar5 years ago
so do I, also give me the concept. my id is redote@hotmail.com
thanks for yr help
you need to use resistors if you aren't.  The average power supply will give way to much current for an LED (even a microcontroller can supply ~40mA of current which is enough to fry an unprotected LED)
tantai5 years ago
nice spiral...

but i am not understand in step-2
1.4 come from ?

“....16 volts transformer without load shows 18 volts output.

So 18 x 1.4 =25.2volts...“

Dipankar (author)  tantai5 years ago
See my answer to maxwelltub where I have explained  the 1.4 puzzle.
DAG10305 years ago
 Fantastic project! I am going to make something similar with my own flair! One question...Have you considered using a capacitor for current limiting and omitting the transformer? Put enough LED's in series to divide up the voltage. This could add to your creative possibilities.
Dipankar (author)  DAG10305 years ago
Dear DAG 1030,
Capacitor will not work on AC and I want it to work on AC.
Try looking up capacitive reactance. In an AC circuit, capacitors and inductors will limit current. You can then divide your voltage between the LEDs to an acceptable level.

An excellent tutorial: http://www.allaboutcircuits.com/vol_2/chpt_4/2.html
Dipankar (author)  DAG10305 years ago
Dear DAG1030,
Thank you for the link, will go through it.
electrosam5 years ago
Well you should say " Conduction Proof" not Insulation Proof.
Dipankar (author)  electrosam5 years ago
Thanks for the correction.
English is not my mother toungue, mistakes are bound to happen.
drzcyy5 years ago
LEDs have an inherent death-wish. They are supposed to be connected to a FIXED-CURRENT circuit, not a fixed-voltage circuit.  What happens is, in a fixed-voltage circuit, the LED will produce some heat when lighted. When its temperature increases, the LED's internal resistance will reduce, therefore the current (ampere) will increase. (remember this simple formula?:voltage=current x resistance). When the current increases, the temperature will increase more, reducing the internal resistance further, therefore increasing the current further. And so forth.
So, what you will see is, when you switch on your circuit, all will be fine at first. After a while, the LEDs will burn brighter. Further on, your white LEDs will change color, usually yellow, or greenish. And if you still dont switch it off, it will burn out very soon.
With all due respect, sir, what you need are "LED drivers", which are actually circuits which produces fixed currents, therefore eliminating excessive current in your LED circuits. You can actually build these "LED drivers" yourself. Maybe write an instructable on it? :)
Thank you, Good instructable anyway!
Dipankar (author)  drzcyy5 years ago
Hi drzcyy,
Please read my answer to verence's comments and you will know the theory behind this Instructable.
drzcyy Dipankar5 years ago
Yes, I fully understand your theory. Basically, you are merely halving the current by utilising an alternating current, and the the diode properties of the LED, ie one cycle of the alternating current drives this line of LEDs, then the other cycle drives the other line of LEDs.
And yes, you are right, halving the current, halves the heat production. But that doesnt mean that the temperature doesnt increase. And when an LED heats up, it draws more current, therefore heating it up further. Maybe a good heatsink will alleviate this problem. Or an inclusion of a capacitor in your circuit will cap off the voltage peaks found in the AC.
Take a look at this:
under the topic "Power Sources".
There's a topic on "Lighting LEDs on mains" too. Good day.
Dipankar (author)  drzcyy5 years ago
Dear drzcyy,
I like to do things differently which is hard for the learned people to digest, but if it works for a long time without any problem then my work is sucessful though it may not be what the BOOK says.
I have read all about LED;s in Wikipedia. Thanks for the link.
I had posted my LED chandelier about a year back with the same circuit and to this day it is working very nicely without any LED blowing off, so I made this on the same principal and circuit in a bigger scale.
Maybe my methods is unorthodox but I can garentee you that it woirks perfectly.
ghoru5 years ago
 perhaps wrapping ricepaper around the whole thing like a paper lantern could be a good way of hiding the transformer etc as i think during the day it looks somewhat unfinished.
merely a suggestion
Dipankar (author)  ghoru5 years ago
Could do that but the light will get dim.
wozlaser5 years ago
This would look rad with a semi-transparent t-shirt on it.
KoenB5 years ago
looks sweet when turned on in the dark but a bit dodgy during the day. Maybe you could try covering up the wiring a bit more.
unibomb bk5 years ago
this was pretty cool. i might keep it as a project idea. but its true that its more professional to do parallel n safer. but a great project.  
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