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DevilsReject

DevilsReject

Cleveland, OH
February 2007

JAN 15, 2010 09:31 PM

Astolphe said:

Coyotemike said:
Flying.

Cars.



Agreed. My brother saw a film in junior high that said we'd have flying cars by the year 2000. They lied. Bastards.



We can't get people to drive cars that don't fly correctly, putting a flying car in the hands of the general public would be insane.....

Coyotemike

Coyotemike

USA
May 2006

JAN 15, 2010 09:33 PM

DevilsReject said:

Astolphe said:

Coyotemike said:
Flying.

Cars.



Agreed. My brother saw a film in junior high that said we'd have flying cars by the year 2000. They lied. Bastards.



We can't get people to drive cars that don't fly correctly, putting a flying car in the hands of the general public would be insane.....



Self-flying cars?

osbjmg

osbjmg

Durham, NC
August 2007

JAN 16, 2010 03:43 AM

I am with you, this is a big step forward away from all these proprietary cables that are marked up a billion % and nowhere near standard.

Next stop, actual wireless power.

nixiepixel

nixiepixel

NEWSWIRE

Sacramento, CA

JAN 16, 2010 10:25 PM

DevilsReject said:

nixiepixel said:

Sick said:

DevilsReject said:
The "technology" is "mum" because it really isn't cutting edge technology. We were working with wireless power in my electronics course. It is highly inefficient and extremely touchy.

I owned one of the Power Mats. Complete waste of my money. I wouldn't suggest it to anyone. Stick with your cords for now until some other company one-ups Power Mat. I have an easier time living without it then i did with it.



C'mon, the technology is only 100 years old.

I suspect the guy on the TV did a lot of ranting about Tesla. They always do.

I think near-field transmission like in the Power Mat could be useful when they figure it out. But far-field...there's just no way of getting around how inefficient it is. Has to do with one of those damned inverse-square laws.



Supposedly it charges at double the speed than that of wired devices.. think it's just hype?



There is a couple problems with this. Like Sick said.

For one, i never trust anything that claims to "double" anything. Ethernet connections that double the speed of connection, chargers that double the speed of the charge and other things like that are usually bogus.

A long explanation under the spoiler:

SPOILERS! (Click to view)


Ethernet cable (Cat5e and Cat6) both have information transfer rate limits. Cat 6 (200MHz) is double the frequency of Cat5e (100MHz), this is double the bandwidth (basically). When doing new installations I install Cat 6 in everything, it's truly has the capability to be faster and is more reliable. It's also a touch more expensive (usually about $40-$50 more when buying in 1000 foot rolls).

There. I doubled your speed right?

Wrong. The transmitter and the receiver still operate at less than 100 Mhz, well within the capabilities of Cat5e cable. Without changing the transmitter and the receiver, i haven't done anything. Cable companies use this ploy all the time.

They claim upgrades to the coaxial is going to increase speeds for digital TV and internet access. The truth is, if they're doing "upgrades" and not changing anything on the receiving end, they're technically doing "repairs". If you don't enhance the transmitter and receiver and still use coaxial cable, nothing is going to change. (Unless the coaxial is really beat to shit, then you'll notice a slight improvement).

Now on to the trouble of charging something at "double" the speed. Any time you charge DC items, be it a car battery, a cell phone battery or even rechargeable AA batteries, heat is created. Ever grab your cell phone right off the charger and it's warm?

That comes from the transfer of power. When you charge something you're basically cycling DC voltage through the battery from negative to positive. The battery is engineered to "store" the power and uses it as necessary. The charging circuit of the phone is engineered to only accept a certain amount of power flow. Any more and the phone will shut down (or if it doesn't you'll ruin the battery)

So this is a bottleneck issue. Your IPod, DS, Blackberry, I-phone are all engineered to charge at a certain rate. I-phones supposedly take about 2 hours to charge (i don't own one it is what i have read, so i may be wrong). if the phone gets too hot, it will shut off and stop charging, the safeguard, shut down so the heat doesn't do any permanent damage.

This can potentially happen when it's being charged in somewhat hot conditions with it's OEM charger. It's also a safeguard usually worked into any Smart Phone, for that matter any cell phone at all.

When charging at normal speeds, the phone heats up to an acceptable, engineered temperature, what that charging circuit sees as acceptable. Now "double" the speed of that charge, and you "double" the power being transferred in which you "double" the heat. If you truly "doubled" the speed of the charge, you would be operating outside of the engineered safe guards in the charging circuit, near impossible. The Phone would probably just shut down, even if you're not in the blazing sun of Vegas. The double rate would create too much heat for the safeguards.

This doesn't mean you can't speed up charge times. The charging circuit is engineered to accept a certain amount of power and the charger usually delivers slightly less than what is acceptable (another safeguard). You can get chargers that deliver more power and probably shave 10 to maybe 20 minutes off that charge time, but you are not going to double it. You would have to break a bunch of laws of electronics, like Ohm's law and Kirchoff's law to double it and you would probably just ruin the charging circuit if you did double it.

Not to mention the fact that batteries start getting ornery if you fuck with their charge cycle.




So yay, another marketing ploy. Now if they could make this puppy solar powered and actually efficient at charging, then I would be really impressed. 8-)

I suppose this is just one jump above a fancy cable management or charging center, and I'm cool with that.. for now.

So all batteries have a memory?
Hmm.. learn something new every day.

I wonder if a new piece of tech like this could actually be detrimental to the charge of the battery..

IKCSmiley

ikcsmiley

Asheville, NC
July 2003

JAN 16, 2010 11:03 PM

DevilsReject said:

Astolphe said:

Coyotemike said:
Flying.

Cars.



Agreed. My brother saw a film in junior high that said we'd have flying cars by the year 2000. They lied. Bastards.



We can't get people to drive cars that don't fly correctly, putting a flying car in the hands of the general public would be insane.....



I don't ever need to see this above my house:

Otoki

Otoki

SUICIDEGIRL

Minnesota, USA

JAN 17, 2010 02:13 AM

mydogfarted said:
I was hoping this article was going to be about this:


A Haier HDTV sits on top of a clear plastic stand, playing a movie from a Blu-ray player. Except as you walk around the display, you realize the HDTV is not connected to anything, not to the Blu-ray player and especially not to a power source.

Nikola Tesla believed he could broadcast power over the air. A company called WiTricity, founded by an MIT professor, is getting close to accomplishing it. A foot or so behind the HDTV is a black monolith. Inside the monolith, and inside the Haier HDTV, are matching coils resonating at 240 KHz . Using highly-coupled magnetic resonance, the coil in the black monolith wireless transfers power to the HDTV at about 80 percent the efficiency of wired AC.



I have such a geek boner right now.


I CAME.

Largely because my apartment is an interior design nightmare because of the lack of three prong outlets in the right places.

Dick_Hertz

Dick_Hertz

I'm lost
September 2008

JAN 17, 2010 06:26 AM

It's just high voltage intense magnetic inductance. It has as many down falls as gains. It can distort signals (both wired and wireless) can wipe out magnetic data, and whatever magnetic waves are not captured by the receiver is energy lost (and it's a lot). Just pick up a college level Physics text book and see for yourself.robot

Mr_Matt_

Mr_Matt_

Pompano Beach, FL
July 2005

JAN 17, 2010 07:42 AM

Buzzkill.

SalemXIII

SalemXIII

Schenectady, NY
December 2005

JAN 20, 2010 12:03 PM

Why is this news? This is basically the same thing that has already been out for some time now. I appreciate the innovation of this device, but until companies smarten up and make a wireless charging standard this is kind of pointless.

corsair

corsair

Greer, SC
July 2004

JAN 20, 2010 12:27 PM

I was hoping this thread would be about eliminating our "bondage" to the cable companies . . to include satelite TV companies. What I want to see, is a company that lets us select stations from a menue, and only pay a small fee per station selected. Out of a current list of 2 or 3 hundred channels . . . I can easily pick 10 or 12 that I actually watch, including 1 HBO. Having to pay so much, and in effect subsidize unpopular or lesser used stations, pisses me off!

videoeye

videoeye

Los Angeles, CA
July 2005

JAN 21, 2010 06:11 AM

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