Instructables
Picture of SPIRAL LED CHANDELIER
INTRO

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.

 
Remove these adsRemove these ads by Signing Up

Step 1: STEP-1

Picture of STEP-1
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.

Step 2: STEP-2

Picture of STEP-2
Circuit-001.jpg
STEP-2

In this step connect the LED’s as shown in the circuit diagram.

I have taken +8 & -8 LED’s in 2 rows so that it can be powered by a 16 volts 1 Amp. AC Transformer.

The calculation is as follows:

16 volts transformer without load shows 18 volts output.

So 18 x 1.4 =25.2volts

25.2 volts divided by Led voltage 3.5. = 7.2

OR say you can use +8 LED’s per row, and –8 LED for the next row.

16 led x 15 times is 240 LED’s in total can be powered by this Transformer.

Take care to connect the LED’s as per the polarity shown in the circuit diagram.

Step 3: STEP-3

STEP-3

Now you have 15 sets of 16 LED’s. Join them together and make a
LED Necklace out of it.

In this step connect the set of 15 LED’s in parallel to the transformer output.

See Diagram for guidance.

The Input of the Transformer is to be connected to your house voltage of 220 volts. AC.

Step 4: STEP-4

Picture of STEP-4
SP-004.jpg
SP-004A.jpg
STEP-4

In this step you can see the close up Photograph of the LED Necklace.

The electrical wires run along with the LED Necklace.

Step 5: STEP-5

Picture of STEP-5
SP-005.jpg
STEP-5

In this step Insulation PVC Tape is wound around the
steel wire to make it insulation proof.

You can also use flexible plastic sleeves for this purpose.

The Transformer is tied to the steel hook by locking wires.


1-40 of 67Next »
satpathi5 months 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)  satpathi5 months 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)  satpathi5 months 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....

hambo8511 months ago
This is awesome, man! Good job!
Dipankar (author)  hambo8511 months ago
Thanks Pal..........
Dipankar (author)  hambo8511 months ago
Thanks Pal..........
agis682 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....
TOCO3 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)  TOCO3 years ago
Hi TOCO,
Tell your parents that this is a VERY SAFE Project as it runs on only 12 volts.
Getting Shocked Dose not arise.
TOCO Dipankar3 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.
siddhanth4 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)  siddhanth4 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.
lolzzzzzzzzzzzzzzzzzzzzzz
Dipankar (author)  handyman3333 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)  siddhanth4 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)  siddhanth4 years ago
WELL DONE.
daleme14 years ago
Nice project and just keep having fun.
rimar20004 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)  rimar20004 years ago
Rimar,
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 Dipankar4 years ago
hi,Dipankar
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)
tantai4 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)  tantai4 years ago
See my answer to maxwelltub where I have explained  the 1.4 puzzle.
DAG10304 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)  DAG10304 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)  DAG10304 years ago
Dear DAG1030,
Thank you for the link, will go through it.
electrosam4 years ago
Well you should say " Conduction Proof" not Insulation Proof.
Dipankar (author)  electrosam4 years ago
Thanks for the correction.
English is not my mother toungue, mistakes are bound to happen.
drzcyy4 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)  drzcyy4 years ago
Hi drzcyy,
Please read my answer to verence's comments and you will know the theory behind this Instructable.
drzcyy Dipankar4 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:
http://en.wikipedia.org/wiki/LED_power_sources
under the topic "Power Sources".
There's a topic on "Lighting LEDs on mains" too. Good day.
Dipankar (author)  drzcyy4 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.
(removed by author or community request)
Dipankar (author)  texasclodhopper4 years ago

Sorry texasclodhopper,
NO my polarities are not screwed up.
I am not an engineer and know nothing of SCHEMATIC drawing but I have tried to explain this with another diagram in step 2.
All the LED's are interconnected in the middle.
Both the Rows of +8 and-8 are opposite to one another.
As AC current flows in both directions alternatively so all the LED's are not glowing at the same time but alternately.
Hope you understand my point.
(removed by author or community request)
Dipankar (author)  texasclodhopper4 years ago
Hi texasclodhopper,
Please read my answer to verence's comments and you will know the theory behind this Instructable.
(removed by author or community request)
1-40 of 67Next »