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| Universalsorrow |
 Posted: Sat Nov 17, 2007 11:15 pm Post subject: Lighting a LED lightbulb using electromagnetic Induction. |
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Forum Freshman
Joined: 17 Nov 2007
Posts: 1
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Well, I have technically two questions and they are as following.
1.) I found this diagram which I'm sure many of you have already seen, but it's a diagram of Nikola's Tesla's famous no wire light bulb.
http://upload.wikimedia.org/wikipedia/en... the website for the picture. Anyway, I was just wondering if anyone could please explain the diagram and the parts and of course if anybody knows, how it works. As I am a student trying to research upon this topic, I was wondering if anyone could please shed some light upon whether this could be easily built and if so how, and any tips or experiences.
2.) A PHD student at MIT (which im sure many have also heard of) has done the wireless levitating light bulb. I am trying to research that and on his website
http://bea.st/sight/levitation/
There is a few schematics, primarily this one as following,
http://bea.st/sight/levitation/resonantT...
Could any please explain the diagram and instructions in colloquial terms? Thank you very much. |
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| atomicthumbs |
| Posted: Mon Dec 03, 2007 1:40 pm Post subject: |
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Forum Freshman
Joined: 19 Nov 2007
Posts: 16
Location: Marin County, California
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The way it works:
It's basically a big transformer. One coil is hooked up to an AC source, and the other one (resonant) is placed some distance away. The coils working together act as a transformer, and the LED lights up (acting as a diode, and a lamp).
The "levitating" bit is probably a bit of string doing its thing. |
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| Harold14370 |
| Posted: Mon Dec 03, 2007 5:50 pm Post subject: |
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Forum Professor
Joined: 13 Apr 2007
Posts: 1578
Location: Pennsylvania
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The second link you posted doesn't work.
I don't think it could be easily built. The LED part wouldn't be too hard. Basically, it is an air core transformer with the LEDs connected to the secondary. Most transformers have an iron core to couple the magnetic field of one coil (the primary) to the secondary coil. By coupling the coils through air, it make it look like the bulb is glowing without a power supply. But without the iron core to couple the magnetic flux, the coupling is inefficient so the two coils have to be close together and tuned to a resonant frequency. The current is relatively weak so he used LEDs, which don't use much current.
The magnetic levitation part is the hard part. The current in the coil makes an electromagnet and the repulsion of this electromagnet with the permanent magnet is what keeps it levitated. It's unstable which means that the control system has to keep making minute adjustments to keep it from either flying off or falling down. Tuning that conrtrol circuit would be very tricky. |
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| Pumblechook |
| Posted: Wed Dec 05, 2007 1:24 pm Post subject: |
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Forum Freshman
Joined: 05 Dec 2007
Posts: 43
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| Transmitting power is inefficient. The aerials or coils required tend to nearly as big as the gap they are trying to bridge. |
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| luxlighting |
| Posted: Sat Apr 26, 2008 7:44 pm Post subject: re:Lux led household bulbs ,autobulb |
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Forum Freshman
Joined: 26 Apr 2008
Posts: 3
Location: 904,124Building,Mingle new village,Longhua,shenzhen
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Dear All ,
How are you ?
We manufacture led household bulbs,autobulbs ,project lamps .
Nowadays ,Led household bulb become very popular and widely substitute incandescent bulbs for indoor lighting because of high luminous and excellent heat sink solve
We are one of the manufacturer of these bulbs :
Led household bulbs:
MR16 1W,3W,3*1W .GU10 1W,3W,3*1W ,JDRE27 1W,3W,3*1W .E14 1W,3W,3*1W .
PAR20 3*1W .PAR30 5*1W .7*1W .PAR38 12*1W .
Low power MR16 ,GU10 With 12LEDs.with reflector ( 0.72w) .PAR30 with 60LEDs( 3.6W)
Led deocration bulbs .led wall washer ,led underground lamps .
Led autobulbs : T10 ,T15Wedge,BA9S ,Festoon 33mm ,37mm 42mm (.single chip .3chips) .red,yellow,blue,green ,cool white (6500k) .warm white (3000-3200k). .T25BA15S .
Thanks and best regards 
Danny Duan
Export manager
shenzhen lux lighting technologies co.,ltd
E-mail : danny@Luxledlight.com ( Welcome to ask more ) .
_________________
Danny Duan
Export manager .Lux team .
Shenzhen LUX LIGHTING TECH CO.,LTD |
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| luxlighting |
| Posted: Tue May 20, 2008 10:07 pm Post subject: re: Sell Led autobulb ,T8 ,Festoon ,BA9S ,Led spotlight |
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Forum Freshman
Joined: 26 Apr 2008
Posts: 3
Location: 904,124Building,Mingle new village,Longhua,shenzhen
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Dear All ,
We are manufacturer of led household bulbs and autobulbs .Project lamps .
1.)Led household bulbs:
MR11 9LEDS .G4 Bulb .
MR16 1W,3W,3*1W .
GU10 1W,3W,3*1W ,
JDRE27 1W,3W,3*1W .
E14 1W,3W,3*1W .
PAR20 3*1W .
PAR30 5*1W .7*1W .
PAR38 12*1W .
(12V or 85-265V .)
Low power MR16 ,GU10 With 12LEDs.with reflector ( 0.72w) .
PAR30 with 60LEDs( 3.6W).PAR38 With 108LEDs .
2) Led deocration bulbs .led wall washer ,led underground lamps .Led linear lamp
3) Led autobulbs : .T8Wedge. T10Wedge ,T15Wedge,BA9S ,
Festoon 33mm ,37mm 42mm (.single chip .3chips) .red,yellow,blue,green ,cool white (6500k) .warm white (3000-3200k). .T25BA15S .
We accept small sample order ,sample cost should pay by Customers .And We also can check Shipping cost for customers .
Time warranty : One year .
Thanks and best regards
Danny Duan
Export manager
shenzhen lux lighting technologies co.,ltd
www.luxledlight.com
Add: 904 ，124Building ,Mingle New village ,Longhua ,shenzhen ,china ,
Tel：0086-755-28096562 。0086-755-28096561-888
Fax：0086-755-28096562
E-mail: luxlighting@126.com / danny@luxledlight.com
Msn; gtl-guangzhou-danny@hotmail.com
Skype; sinocolighting
_________________
Danny Duan
Export manager .Lux team .
Shenzhen LUX LIGHTING TECH CO.,LTD |
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| luxlighting |
| Posted: Mon Aug 11, 2008 6:08 am Post subject: Led strip lamp : LX-RLM001 |
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Forum Freshman
Joined: 26 Apr 2008
Posts: 3
Location: 904,124Building,Mingle new village,Longhua,shenzhen
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Now we have led strip lamp for choice :
LUX LED Linear lamp :
① Housing material :
Soft PCB
② LIGHT SOURCE :
High quality SMD 3528
③ FIXTURE OUTPUT VOLTAGE
DC12V
④ POWER SUPPLY INPUT VOLTAGE :
DC12V
⑤ BEAM SPREAD
120Deg
⑥ Dimension :
1.32/2 Inches spacing of LEDs .
Can cut every 3 or 3 times LEDs : Approx 1.97Inches .( Standard 50mm ) .
5000mm ,1000MM OR 500MM
⑦ LED QUANTITIES :
60LEDs ( 1000MM) .500MM ( 30LEDs)
⑧ Waterproof Rank :
IP66
5 meter/reel .can bent ,cut every 3 or 3 times ( 6,9,12 LEDs) .Choice of color .RGB fast change with remote controller .
Thanks for choice .
Best regards
Danny Duan
shenzhen lux lighting technologies co.,ltd
www.luxledlight.com
Add: 904 ，124Building ,Mingle New village ,Longhua ,shenzhen ,china ,
Tel：0086-755-28096562 。0086-755-28096561-888
Fax：0086-755-28096562
E-mail: luxlighting@126.com / duanjian_2006@yahoo.com.cn
Msn;gtl-guangzhou-danny@hotmail.com
Yahoo ID : duanjian_2006
Skype; sinocolighting
_________________
Danny Duan
Export manager .Lux team .
Shenzhen LUX LIGHTING TECH CO.,LTD |
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