Introduction: LED GLOBE

LED Globe is a light consisting of 240 LEDs, which gives a very pleasant light, at the same time lighting up the whole room. It is suitable to be hung in your Drawing room, Dining room or Bedroom. It runs on 12 volt 1 Amp. AC Transformer connected to the house mains of 220 or 110 Volts.

Step 1: Things You Will Need: -


One AC Transformer of 220 to 12 volt AC, 1Amp.

240 Bright White LED’s size 5mm.

Mild steel wire to make the supporting rings.

Electrical thin wire, solder etc.
5mm Iron Rod to make the HOOK.

Step 2: Construction of the GLOBE

Make 3 Big Rings out of the Mild steel wire of the same size and 2 small rings of same size.

Tie up the 2 Vertical rings with the Horizontal ring with thin wires as shown in the illustration. Take care to see that there is no electrical connection between the Vertical and Horizontal Rings.

Wrap cello tape around the Horizontal rings to make it a bad conductor to Electricity.

Now tie up the 2 small rings, one at the top and the other at the bottom of the GLOBE.

Take care so that there is no electrical contact between the Big rings and the Small Rings.

Step 3: Circuit for the LED's

Circuit for the LED’s.

Here we will be using two types of LED circuit for this project.

8 Double Row and 8 Single Row of LED’s.

5 LED’s have been used in one ROW because……………

12v x 1.4 = 16.8

16.8 divided by 3.5v = 4.8 or say 5 LED’s. in one row.

 

12 volt AC has been provided to 5 plus and 5 minus LED’s. In the Double Row LED’s.

The same 12 volt is connected to the single rows, See Diagram.

Step 4: Placement of the Rows

It is shown in this Diagram the placement of Double and Single Rows of LED's.

Step 5: Rows of LED's

In this step we see as to how the Rows of LED’s are connected to the wire frame.

After each Double Row of LED’s a Single Row of LED’s are placed to fill up the gap in the GLOBE.

In the Double Row LED’s the top and bottom are soldered to the two small rings at both ends and the middle (5 LED’s) are soldered to the Horizontal big ring.

The 2 Small rings are connected to one Terminal and the Horizontal big ring is connected to the other Terminal of the 12volt Transformer.

Step 6: Transformer

Place the Transformer in a box fixed to the Hook from which the LED GLOBE is to be hung in the room.

Plug in the Transformer to the mains and enjoy the light.

Comments

author
Chris Bilton (author)2016-04-24

fabulous !!

author
Dipankar (author)Chris Bilton2016-04-24

Thanks........

author
RobertC52 (author)2015-12-14

this looks awesome!! do you think you could help me out on project im working on

author
Samantha Led (author)2015-07-10

So nice !

Look our rechargeable led lights : http://rechargeable-led-light.com

author
money bags (author)2014-11-24

Great project

author
carolcycling (author)2013-02-27

Great job Dipankar! This is a simple LED ball,if you wanna some information to make a full color LED ball,I'd like to offer more some tech info,but it's very complicated,it can't make by hand,it's picture at http://www.univiewled.com/creative/led-ball.html,if you wanna more info,I can get at carolcycling@gmail.com

author
crestind (author)2011-07-17

Would be interesting to have them mounted on one of those expanding spherical sculptures.
http://images.travelpod.com/users/pbprogo12/1.1275378962.large-metal-expanding-ball.jpg

author
ray_Bond (author)2011-06-15

Congurats Dipankar bhai another good work :)
so how r u ? and wats is next in line ?

author
Dipankar (author)ray_Bond2011-06-15

Thanks Pal,
I have not yet thought about my next Project.
The inspiration should come on its own.

author
Jayvis Vineet Gonsalves (author)2011-06-13

Great job Dipankar. Check out my instructable too: https://www.instructables.com/id/Super-Simple-Automated-LED-Wardrobe-Lights/

author
jayeshshinai (author)2011-06-05

ketan...
In india, u should really start selling this kind of stuff...
I dont think iv seen something so creative around!

author
Dipankar (author)jayeshshinai2011-06-05

This piece is already SOLD.

author
qwerty156 (author)Dipankar2011-06-05

How much did you sell it for :O

btw, you could improve efficiency by wiring all the leds in series using 240v DC.

author
Dipankar (author)qwerty1562011-06-06

How do you convert 220v AC to 240v DC?

author
Algag (author)Dipankar2011-06-10

I think he means 24, cause i was confused too

author
Dipankar (author)Algag2011-06-10

I was also confused, yes I also think the same.

author
qwerty156 (author)Dipankar2011-06-11

Yeah i meant 220v.

AC supply-Bridge rectifier-220v DC


Only problem is that in places like india, there are frequent fluctuations and that could result in problems (i have seen 195-246v) in my area

author
el greeno (author)Dipankar2011-06-10

With a REALLY big bridge rectifier :-P

author
acornman (author)2011-06-08

Really neat Idea..... as there is no real need for this sphere to be hollow in terms of light emission ,instead of constructing fiddly wire hoops ,why not purchase a large polystyrene ball and mount the leds on the surface.Electrical insulation would be easier and the whole very light. Of course if you were to insulate carefully you could cover the poly ball in aluminium foil for extra reflection and for extra perzazz include a few rainbow slow colour change leds in the mix.

author
Algag (author)acornman2011-06-10

The problem with the slow change is that they would keep flashing on and off because of the AC so it wouldnt create the same effect, but it would look epic

author
Dipankar (author)acornman2011-06-08

Good idea, Thanks.
As you know all the sides are visible in the hollow sphere, whereas you can only see one side of an opaque ball.
You will agree with me that a hollow sphere has a beauty of its own?

author
acornman (author)Dipankar2011-06-09

You are not wrong It does have beauty there's no doubt, such a good springboard
though for other ideas.

author
rbland (author)2011-06-05

You WILL absolutly need current limiting resistors. LED's are very current sensitive. If your voltage rises by a few millivolts over the calculated voltage, the LED current will raise over the reccommended value of probably 20mA per LED.

Not all the LEDs will have the same forward voltage either.
You will probably soon find that one will fail, then another and then eventually all of them without any current limiting (usually a resistor in series).

author
Dipankar (author)rbland2011-06-06

My LED CHANDELIER which was published in Oct.2008 has the same circuit and till today it is glowing without a single LED packing up.
Three years is a long time for a trouble free performance, so why should I change my formula of 12 x 1.4?
SEE STEP 3 for details.

author
rbland (author)Dipankar2011-06-06

Hi again. It must be just luck that the voltage of the transformer is close enough to the correct forward voltage of the LEDs. Not everyones transformers will be the same volthage though and not everyones circuit will have the same characteristics.

author
kishore (author)2011-06-05

Its excellent,but you have not used any resistor for constant equal ant power to each LED.So till how long LED will glow continuously on 220, 12v, 1amps transformer , Previously I tried using using 236 Led in series circuit it did not worked on 220 ,12v ,1amps transformer, So I rectified with Resistor after every 4 led,8 Led then 12 LEd so on with every 4 led with resistor between value of 1,4 ups then it Glowed for continously

author
Treknology (author)kishore2011-06-05

I think this is a great looking result, but like you, I would prefer it to be a continuous string running directly from the mains rather than the losses through a transformer.

author
Dipankar (author)Treknology2011-06-05

Thanks,
You are entitled to your ideas but, there is always a risk involved with using 220 volt AC. directly.

author
Treknology (author)Dipankar2011-06-06

While prototyping and experimenting I would agree that ELV is the way to go. Errors tend to be much less painful.

author
Dipankar (author)kishore2011-06-05

In STEP-3 you will find the Maths regarding this project.

author
trike road poet (author)2011-06-03

Dipankar,

Once again you pull off the wonderful!

Just the thing for a light for my buddy's cabin, (Most of his lighting is from a solar/battery system, and this will be a hit!!!!!!!

You do have a knack for this!

author
Dipankar (author)trike road poet2011-06-05

Thanks Pal,
You got it right.

author
thecageybee (author)2011-06-05

Can I ask, what's the reason that the LEDs are arranged in strips of 2 or 1. Is it not possible to do all double strips or all single strips?

author
Dipankar (author)thecageybee2011-06-05

As the Diameter of the Globe is less at both ends and more at the center, that is why I have used double strips and single strips of LED's to adjust the gaps.

author
ElvenChild (author)2011-06-05

! Flabbergasted!

author
arbita2 (author)2011-06-04

ok

author
mary candy (author)2011-06-03

I love it !
let's the party start !

author
Jayvis Vineet Gonsalves (author)2011-06-03

Gr8 job.

author
pandyaketan (author)2011-06-02

The LED Master is back! 5 *s done!

reg
ketan
--------------------------------------------------------
"May the good belong to all the people in the world.
May the rulers go by the path of justice.
May the best of men and their source always prove to be a blessing.
May all the world rejoice in happiness.
May rain come in time and plentifulness be on Earth.
May this world be free from suffering and the noble ones be free from fears"
---- Vedic blessing

author
pandyaketan (author)pandyaketan2011-06-02

Sirji, you should also post videos on metacafe, youtube, etc - millions of ppl there!

You will get *thousands* of hits there "per day" and therefore, more ppl in the world will be able to find something useful.

Also, you can provide a link of your i'bles in your videos, so those who, after seeing the videos, want to read in detail, can visit here....

my 2 cents...

reg
ketan

author
mathman47 (author)2011-06-02

Great job. How about changing to 3-color LEDs & a micro to change colors? Now that would really be a show.

Your solution and instructions are so simple that even I can follow them. Not only do you have the ability to make the electronics simple, you have a knack for explanation too.. Thanks for sharing.

author
Soksume (author)mathman472011-06-02

no need for a micro controller just use 3 pots

author
Dipankar (author)mathman472011-06-02

Thanks Pal,
Only problem with color LED's are that they do not give enough light to light up your rooms, and my intention is to have no other lights in the room except the Globe.

author
rimar2000 (author)2011-06-02

Good work, Dipankar. How many USA dollars cost the leds?

author
Dipankar (author)rimar20002011-06-02

Thanks Pal,
In India it will be about 5$.

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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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