What is Digg?89 Comments
- inactive, on 12/10/2008, -0/+63Here is another cool levitating lightbulp http://www.youtube.com/watch?v=XHcHG63tUqM
Actually it seems to me even cooler than the posted one... - Luber, on 12/10/2008, -0/+21Wow! Cool! I want to have one at home!
- arunforce, on 12/10/2008, -0/+20Tesla did it first.
- cJw314, on 12/10/2008, -0/+14Buried for misspelling buried.
- vtbarrera, on 02/03/2009, -2/+15This would be prefect for my nephew's science project!
- diggduggDOOM, on 12/10/2008, -0/+11I thought that was a picture of Tom Servo.
- alpha19, on 12/10/2008, -0/+11A toilet at the end of the garden? What does that mean exactly?
- roomforpanic, on 12/10/2008, -0/+11You speak in riddles. Do go on.
- zephc, on 12/10/2008, -2/+12Levitation and wireless power, based on the sound science of witchcraft
- bmkalbf, on 12/10/2008, -0/+9I guess that is what the floating "idea" light bulb looked like above his head when he thought of this great contraption.
- kushin, on 12/10/2008, -0/+7Robin Massink from the Netherlands has built a cool Magnetic Levitation Light Bulb it uses Wireless Energy Transfer to power the bulb. It is always weird to see something being powered with no wires!
"I used this globe (http://www.thinkgeek.com/geektoys/science/98b8/) for the levitating part. It consists of 2 permanent magnets, and 2 electromagnets, coupled with a hall sensor to keep a third magnet (inside the globe) floating. I mounted a ordinary 20W lightbulb on this magnet, after removing the plastic globe. The light bulb is connected in parallel with a 100nF capacitor, and a coil of about 40 turns of copper wire.(diameter is about 6 cm). The base has the same coil, with the 100nF capacitor in series connected. The base-coil receives a 50volt, 30kHz square wave signal, from a half H bridge(something like this: http://lh4.ggpht.com/otp.arun/SJkzTSR90lI/AAAAAAAA ... with the coil/capacitor connected where the motor is drawn. The current is about 0.5 amps. It works by driving the primary LC combination at resonance. A induction current is generated in the secondary coil because of the resulting magnetic field generated. The current is then directly fed into the light bulb." - specialK16, on 12/10/2008, -0/+6Tesla was underrated, even by Edison himself. It's a shame he was taken as a mad scientist in his last years.
- swordedge, on 12/10/2008, -0/+6if you need shoes and a flash light (torch for the British) to go to the bathroom at night, you might be a redneck.
- bitterbug, on 12/10/2008, -1/+7Levitating light bulb gives you cancer.
- palmdalian, on 12/10/2008, -0/+6I agree that this one is more interesting. Here is the project page:
http://bea.st/sight/lightbulb/ - mwalker05, on 12/10/2008, -0/+6looks like a combination of voodoo and mirrors to me. you almost had me fooled for a moment though
- 1professional, on 12/10/2008, -4/+10It could hover like three feet above me at night lighting the way when I go to use the toilet at the end of the garden...welcome to the European Union
- jasdf, on 12/10/2008, -1/+6I hope that you have an electrical engineering degree to help him out.
- DiggitalGhost, on 12/10/2008, -0/+5Nice :)
- insanebrain, on 12/10/2008, -0/+5Nope. . it's called 'science' . . ever heard of it ?
- bitterbug, on 12/10/2008, -0/+5Joe Jackson gave me cancer. :(
- westyvw, on 12/10/2008, -0/+5Buried for not knowing that getting a CFL to glow is too easy.
- radioliar, on 12/10/2008, -1/+5And...cut to Mythbusters in 8 months.
- NipGrip, on 12/10/2008, -0/+4Yeah, what 80-100 years ago? How far we've come.
- robdiggity, on 12/10/2008, -0/+4And the music is far more funky fresh.
- jeremyduffy, on 12/10/2008, -0/+4Magnetics is the future. Imagine, no grease required, minimal friction. It's very cool stuff.
- insanebrain, on 12/10/2008, -1/+5Magnetism and induction ... cool 'trick' anyways. . ... but WTF do I see 'Intelligent design' on the bottom ?
- elfs1der, on 12/10/2008, -0/+3I think they are using some old Tesla theories about the wireless electricity with longitudinal current
- inactive, on 12/10/2008, -8/+11Burried for not using a CFL.
- k3rfuffl3, on 12/10/2008, -0/+3The contraption was made by creatures having some semblance of intelligence?
- DeFex, on 12/10/2008, -0/+3how many watts are used to levitate and light the 20 watt bulb?
i think you probably have a little heater there as well. - thcobbs, on 12/10/2008, -1/+4Several hundred grad students...... DIED.... to bring us this information....
- jeremyduffy, on 12/10/2008, -0/+3In case you're wondering why you're getting buried, you can light up lights without plugging them in
example:
http://blog.wired.com/gadgets/2008/02/1301-glowing ... - DeFex, on 12/10/2008, -0/+2DUH
thats why we get electrocuted all the time by mains transformers and radio stations putting electricity in the air.
electricity in th air is also known as a "spark" or "lightning" it is not usually used to transfer power.
electricity is changed to magnetism. then back to electricity. magnetism wont hurt you unless you have a tinfoil hat. - jasdf, on 12/10/2008, -2/+4This is obvious proof that magic is real. That is, magic really is reality, just in ways we don't normally observe.
- ayycee, on 12/10/2008, -0/+2I think whats going on is that on the base there is a wire coil (a solenoid), through which a current is run, producing an upward magnetic field. Then this field induces a current in another solenoid on the bottom of the lightbulb. This induced current also induces a magnetic field, this time pointing downward. The current also powers the light bulb. Then the downward force due to gravity and the upward repulsion of the magnetic forces balance out and now it hovers.
- peccadillop, on 12/10/2008, -0/+2never understood electromagnetics..... got a D
- JustinHopewell, on 12/10/2008, -0/+2Before we learn that, has he heard of the "Space" or "Caps Lock" keys?
- surfshaker, on 12/10/2008, -0/+2But current is only induced by a CHANGE in magnetic field so the field would have to be alternating thus causing movement?
- inactive, on 12/10/2008, -0/+2That would be expensive.
It uses upwards of 250w to power a 20w bulb (not even fully) and levitate it.
Super efficient, huh? - Battlecry, on 12/10/2008, -0/+2"Wireless energy transfer"... Pfft. It's called electromagnetic induction and it's been around since the 1800's. You might not have a levitating light bulb at home, but you probably have a "wireless energy transfer device." If you own an electric toothbrush, there's a good chance it uses electromagnetic induction to charge itself.
- jmarkow, on 12/10/2008, -0/+2Primer anyone?
- inactive, on 12/10/2008, -0/+2Umm...I'll take my flying car now plz! Hey, I watched Back to the Future, everyone should be getting one of those things in the next 6 years!
- Shakermaker, on 12/10/2008, -0/+2WTF is up with the shiatty screen ratio? Was this made on a cell phone??
- ed19, on 12/11/2008, -0/+2And it could flick on whenever you have a good idea. (like building a toilet that isn't at the end of your garden)
- PauloEskilo, on 12/10/2008, -0/+1Cool man!
- westyvw, on 12/10/2008, -0/+1Like the ones from MIT now used as art projects? http://blog.wired.com/gadgets/2007/06/levitating_w ...
- petomni, on 12/10/2008, -1/+2Someone post how to do this so I can digg you up.
- MattB123, on 12/10/2008, -0/+1"Everything gives you cancer." - Joe Jackson
- JoeRW, on 12/11/2008, -0/+1Room temperature superconductor ftw!
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