possible to get electricity without wires?

[0roo0roo]

electricity transmission isn't 100% efficient the way we do it now. no need to waste even more power, bad for enviroment.

 

[XZeroII]

I was going to mention the tesla thing. Apparently he 'charged' the earth itself. Normally we use the earth as a ground to dissipate energy, but he actually charged the earth (I don't know the details). I also read that if what he did were done today, the charge would travel up all our ground wires and fry anything that is grounded. Pretty cool if you ask me.

 

[Shalmanese]

lol, theres so much BS going on around tesla now. 99% of what people claim he did never happened.

 

[Menelaos]

Bluetooth incorporates power transmission.

Menel.

 

[jetsam]

yeah, I got one. Put a windmill on the gzmo you need remotely powered. Then plug a really big fan into a nearby outlet, and point the fan at the gizmo.

 

[lobadobadingdong]

hahaha, this makes me think about my sonicare toothbrush :Q,

it charges with a simple coil at the base and another inside the toothbrush, of course they need to be close together before they transfer any juice.

 

[Lanik]

there is no way to make the transfer "selective" enough (tranfer energy only from transmitter->reciever) for it to be safe.

Why? You could send only enough power to make it work using a communications signal, ramping up the signal until you get a reply. Also, instead of boasting the gain to improve the quality of the communication, you could spread the signal over a larger spectrum.

 

[Smilin]

Having some sort of communication would let you restrict when power was available, but once available it would be open to anyone willing to stick an antenna in the air.

 

[JediJeb]

The problem I see is if you use electromagnatism to transmit the power it needs to be in the Ghz range to be efficient and that is dangerous to health.

 

[f95toli]

Originally posted by: Lanik
Why? You could send only enough power to make it work using a communications signal, ramping up the signal until you get a reply. Also, instead of boasting the gain to improve the quality of the communication, you could spread the signal over a larger spectrum.

I thought we were discussing transmitting energy, not just powering communication devices. If you only want to power a simple transmitter/reciever circuit that can be done, but that does not mean that you can run your microwave owen using the same technique

 

[Epimetreus]

Tesla's ideas actually were less hazardous than the current technology when you factor in second-level threats present in our current approach.
However, his technology is VERY imcompatible with the current infrastructure; if you built a high power device based on his ideas it would destroy every conventional electrical device connected to the power grid if the power grid were anywhere NEAR it(The wires would actually pick up and transmit the massive electrical charge from the device to any devices plugged in at the time).

 

[Shalmanese]

Originally posted by: f95toli

Originally posted by: Lanik
Why? You could send only enough power to make it work using a communications signal, ramping up the signal until you get a reply. Also, instead of boasting the gain to improve the quality of the communication, you could spread the signal over a larger spectrum.

I thought we were discussing transmitting energy, not just powering communication devices. If you only want to power a simple transmitter/reciever circuit that can be done, but that does not mean that you can run your microwave owen using the same technique

You send a low powered signal to make sure there are no obstructions and then you send a high powered pulse.

 

[GoHAnSoN]

the sun is transmitting enerygy....
we receive it "wireless" with solar panel.

well, so someone just create a "mini-sun" pls ?

 

[Sonnday]

It's important to remember that the entire theory and purpose behind Tesla's coil was to create a way to transport electricity with minimal losses. That's what a tesla coil does, it increases the voltage and frequency to the point where it no longer has the same properties. It won't go into your body, but can only travel over the surface. True, it can burn you, but that''s besides the point.
The purpose is that it is damn near impossible to ground electricity at about 2,000,000 volts and 2Mhz. Therefore, the electricity only goes to the nearest and best conductors, hence a line of tesla coils would pass the electricity very efficiently for the simple fact that it has nowhere else to go. The air no longer becomes an insulator, and the electricity passes easily through it. If you really want a way to tranfer electricity like that, a tesla coil may just be the way to go.

 

[pX]

John Galt, the man who carried the world on his back, did it in Atlas Shrugged

 

[Smilin]

Originally posted by: pX
John Galt, the man who carried the world on his back, did it in Atlas Shrugged

Who is John Galt?

 

[PowerEngineer]

Originally posted by: JediJeb
The problem I see is if you use electromagnatism to transmit the power it needs to be in the Ghz range to be efficient and that is dangerous to health.

Actually, the power lines we use today are actually wave guides for the electromagnetic radiation that carries the power from one end to the other. It's generally easier to talk about power systems in terms of alternating voltages and currents, but these alternating voltages and currents are linked to alternating electrical and magnetic fields that travel down the lines too. Low frequency electromagnetic radiation (like 60 Hz) tend to spread widely (not directional); the wire acts as a wave guide to lower the impedance of the path and to keep them going in the right direction. Higher frequencies (like microwave) are much more directional and therefore don't need a wire.

 

[Harabecw]

This is about the recharge pad...if you can use it to recharge, why not use it for data? Have the desk plug into a cable/ADSL modem and, er, invent new tech for LAN cards.

 

[Shalmanese]

Uh, thats called wifi . On a slight tangent, the IEEE have now ratified a new power over ethernet standard which allows laptops and similar devices to be powered via cat5. Thats sort of the same thing isnt it?

 

[Red Squirrel]

When I was young I was alot into electricity, and I built a radio that ran on nothing. I could only get one station though, the receiver was not that powerful. It was a crystal radio. The waves actually powered it, but because of such low ammount of power, it needed this low voltage earphone so you can hear it. I remember I had tried to hook it up to a speaker and it did not work.

 

[CTho9305]

Originally posted by: RedSquirrel
When I was young I was alot into electricity, and I built a radio that ran on nothing. I could only get one station though, the receiver was not that powerful. It was a crystal radio. The waves actually powered it, but because of such low ammount of power, it needed this low voltage earphone so you can hear it. I remember I had tried to hook it up to a speaker and it did not work.

It's called a crystal radio.

 

[Red Squirrel]

Yes I mentioned that.