Introduction: 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.

Step 1: 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

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

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

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.


Step 6: STEP-6

STEP-6

Connect all the electrical wires and hang it from the ceiling fan hook.
Switch on and ENJOY…………………………….

I HAVE BEEN USING THIS FOR THE LAST 3 MONTHS, NO PROBLEMS.

Comments

author
PDXLarry (author)2017-04-25

Whoa! This is spectacular! Something like it would look so good hanging in my stairway. Looking at the photo of thre 240 LED necklace in Step 4 made me wonder if strings of LED lights [Christmas or other] would work? I'm not mechanical, and altho' you've laid it out so carefully I'm even less electrical. :-)

author
satpathi (author)2014-03-24

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

author
Dipankar (author)satpathi2014-03-25

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....

author
Dipankar (author)satpathi2014-03-25

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....

author
hambo85 (author)2013-08-28

This is awesome, man! Good job!

author
Dipankar (author)hambo852013-08-28

Thanks Pal..........

author
Dipankar (author)hambo852013-08-28

Thanks Pal..........

author
agis68 (author)2011-09-11

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....

author
TOCO (author)2011-05-16

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.

author
Dipankar (author)TOCO2011-05-17

Hi TOCO,
Tell your parents that this is a VERY SAFE Project as it runs on only 12 volts.
Getting Shocked Dose not arise.

author
TOCO (author)Dipankar2011-05-18

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.

author
siddhanth (author)2010-03-17

 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 :)

author
Dipankar (author)siddhanth2010-03-18

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.

author
handyman333 (author)Dipankar2010-09-24

haaaa haaaa haaaaa
L..D ko hole me dal do, phir uska legs ko bend karo aur solder karo.
lolzzzzzzzzzzzzzzzzzzzzzz

author
Dipankar (author)handyman3332010-09-24

Hole mein dalna is very easy nahain?

author
siddhanth (author)Dipankar2010-03-18

 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 :-)

author
Dipankar (author)siddhanth2010-03-19

Tum ne bedi samajdari ke baat ke.
Main Bangla, Hindi aur Oriya ma bhe baat kar sakta huin.

author
siddhanth (author)Dipankar2010-03-19

 aami o baangla bujhte paari :-) aami aulpo aulpo kore bolte o pari..

author
Dipankar (author)siddhanth2010-03-20

WELL DONE.

author
daleme1 (author)2010-06-11

Nice project and just keep having fun.

author
rimar2000 (author)2009-11-23

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

author
Dipankar (author)rimar20002009-11-23

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.

author
redote (author)Dipankar2009-12-16

hi,Dipankar
so do I, also give me the concept. my id is redote@hotmail.com
thanks for yr help

author

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)

author
tantai (author)2009-11-30
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...“



author
Dipankar (author)tantai2009-12-01

See my answer to maxwelltub where I have explained  the 1.4 puzzle.

author
DAG1030 (author)2009-11-30

 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.

author
Dipankar (author)DAG10302009-11-30

Dear DAG 1030,
Capacitor will not work on AC and I want it to work on AC.

author
DAG1030 (author)Dipankar2009-12-01

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

author
Dipankar (author)DAG10302009-12-01

Dear DAG1030,
Thank you for the link, will go through it.

author
electrosam (author)2009-11-29

Well you should say " Conduction Proof" not Insulation Proof.

author
Dipankar (author)electrosam2009-11-30

Thanks for the correction.
English is not my mother toungue, mistakes are bound to happen.

author
drzcyy (author)2009-11-28

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!

author
Dipankar (author)drzcyy2009-11-29

Hi drzcyy,
Please read my answer to verence's comments and you will know the theory behind this Instructable.

author
drzcyy (author)Dipankar2009-11-30

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.

author
Dipankar (author)drzcyy2009-11-30

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.

author
Dipankar (author)2009-11-29

Dear texasclodhopper,
I am really very sorry if I have in any way offended you though I did not mean to.
Many people do the same thing in many different ways, but the outcome is important.
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.
This design was inspired by my friend qs who has posted many such Instructable in this site, before making any judgement I request you to go through them.
THANKS.

author
Dipankar (author)2009-11-29

Hi texasclodhopper,
Please read my answer to verence's comments and you will know the theory behind this Instructable.

author
ghoru (author)2009-11-28

 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

author
Dipankar (author)ghoru2009-11-28

Could do that but the light will get dim.

author
Dipankar (author)2009-11-28


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.

author
wozlaser (author)2009-11-27

This would look rad with a semi-transparent t-shirt on it.

author
KoenB (author)2009-11-27

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.

author
unibomb bk (author)2009-11-25

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.  

author
mdog93 (author)2009-11-24

how come you only drew the red (+) wire going to the first led, surely both need to be connected to the first led in the circuit.

Is there something I don't know or what?

author
rogueleadr (author)mdog932009-11-24

dude these are wired so 8 LED's act as one "light bulb". So the black wire going into the last negative end feeds into the first as well. So these are groups of 8 LEDs wired in series and the 15 groups of 8 are wired in parallel.

author
Dipankar (author)rogueleadr2009-11-25

Groups of 8+8=16 -------(+8 & -8 )
16 LED one set
16 x 15 sets
= 240 LED's.
15 sets connected in parallel.
RIGHT.

author
mdog93 (author)Dipankar2009-11-25

k, i think i know, i don't fullt know what you are referring to at times, but i get the series thing, just doesn't lok like it's wired in series cus its no layed out how i imagine it to be in a circuit diagram

author
killersquirel11 (author)2009-11-24

Just a note:  it is a bit dangerous for LEDs to be in series.  If one of them fails and gets an internal short, all of the other LEDs in series with it will probably get blown out.  much safer to use two rails and just have all of the LEDs in parallel.  And make sure you use resistors

author
Dipankar (author)killersquirel112009-11-24

Please see minutely that the LED's are interconnected so if one fails by chance the others will work.

About This Instructable

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Bio: Now I am a retired person, who enjoys life and making small things to pass the time keep myself busy.
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