He did it using HF, i was pointing out it was going to be extremely hard doing it with UHF. It's not that hard establish long range at HF.
http://wiki.whatthehack.org/index.php/Wifi_over_50 0_km%3F_Impossible%3F
I dont want to be one of those ppl that sits around and tells other what they cant do, BUT, im really skeptical on the concept that these guys will lug two huge 8 foot dishes up a 15,000ft mountain to establish a wifi link.
If we assume that each antenna is on top of a 5,000 foot mountain, with nothing in between this gives a line of sight distance of 190 miles. If we raise the mountains to 15,000 feet, the distance becomes 320 miles (though I'm not sure that sutiable mountains even exist that are that tall, that close, and have nothing inbetween to interfere. You could use an airplane or balloon instead of a mountain, but then aiming the antenna (and even getting it up there) becomes very difficult.)
So I stand corrected, it can be done by climbing a couple 15,000 foot mountains and assuming the conditions you mentioned exist. But thats an extradonary feat, and although I think its very cool that they were able to get 125 miles, i just don't see them going through that effort just to get a couple laptops talking to each other.
There is just no way they can maintain 300 miles/480km without using relay stations. Multi megawatt FM stations cannot get that range simply because the curvature of the earth causes the signal to disappear into space before reaching its destination. 125/200km is about the maximum range that is possible on frequencies much higher than HF, even with captain picard's private satellite link to france they are not going to get 480km out of it.
This happens because of what is referred to as intermodulation or just intermod. Even though the phone's frequency is waay out of the frequency of the audio transisters in your speaker's amp, the power level at that short distance is enough to overload the transisters and push them into what is called the non-linear region. In this region, the transister acts like a diode or am radio and rectifies the signal from the cell phone. As such many different frequencies are produced inside the transsiters, some of which fall into the audio spectram that you hear.
Not likely, even if the roof was covered with panels they would only produce a max of 160 -190 watts. By the time it gets to the pelties there will be some cooling effect of about 80 watts but it would be way too small to ever cool down a car.
There is one really cool thing about this project that no one has mentioned. Instant heat in the winter time!
Now that explains why they look so bad compared to HDTV. But I'm now a little confused. If DVDs are only 720x480 and NTSC regular TV is 640x480. Why do they look better than standard TV? Hmm.
"Recently I took apart a working 200MB Western Digital HDD, only because the cover would make a useful screw holding tray while working on my bike, and that use became more valuable to me than 200MB of storage ! It was a bit sad to pull apart a still working drive of such age."
I read that as 200GB, and read it several times over thinking WTF is wrong with this guy's head taking apart a 200Gig drive to store bike screws in.
Corporation are out to make Money?? HOLY SHIT BATMAN, THATS FUCKING INGENIUS!!!! Wow... What a shock. All this time I thought corporations were for helping children living in africa. I dont suppose lawyers are out to make money, too? Only you would know a thing like that Shirlock!!!
DC isn't as affective at degaussing as AC. For example, all monitor degaussers work at AC. So does the erase head on tape decks, it is typically connected to a 400khz oscillater. The reason is, for something to be magnetized, it has to be exposed to a changing magnetic field.
I would just add that another way to defeat these algorathims is to just type in random stuff for the serial, and IME after the 10th try it manages to pass and the software continues.
If I was really serious about getting long uptime, cheap, here's what i would do:
1. Plus the PC into an inverter, permanently.
2. Run the inverter from a series of deep cycle batteries.
3. Have a good battery charger running constantly.
4. Profit!
This way, the power can go out and come back in as many times as it wants, it can surge or brown out and the PC wont feel a thing. Plus, its infinitley expandable, you can use a whole bank of marine batteries and a 40 amp charger wont break a sweat.
ATI TV wonder really sucks, i have one, also seen the all in one wonder those suck as well. Too many compatibility problems, piss poor drivers, just not a good product at all.
I have always wondered about that. Everyone today has a "digital" cellphone, that supposedly sends everything up in digital packets, so how come so many people with scanners can still tune into converstations?
I think the problem has been that car manufacturers have been using the difficult and expensive solution of developing complex technology to combat the problem. What they should do instead is redesign all the roads so cars are driving down hill all the time, thus dramatically increasing fuel economy on all vehicles regardless of type.
This idea would probably not work. The spinning disk would probably have to weigh several hundred pounds in order to store enough energy to function as a generator. In addition it's extremely hard to get something that heavy to spin at 5000 rpm and its even harder when its derived from 60hz AC. I guess what i'm saying is that it probably wont work that well.:=)
That may have been the case at first but later in the pentiums all it did was turn or the secondary cache to make the cpu seem like its running at a lower clock.
This is not true. Most cars will reset the light automatically after the fault does not reoccur for some time. For example, on my maxima, after 40 drive cycles if the fault doesnt happen again it will reset the light and pretend nothing happend.
You raise a good point on bulb life. I think if i were to ever build/buy a projector, i would put in some sort of a secondary cooling system. Maybe replace the stock fan with a more powerful one. Or add a metal heat sink to the bulb. Either one will increase life, I think. I'm sure there is some nut case out there already that has installed water cooling.
Also buying a very powerful bulb and then running it at a lower power level (somehow) will yield a big boost in its rated lifestand.
I think the assumption you make is that they get all their money back for tooling the factory, engineering the product and marketing in the first year, which may not be the case. They might be spreading it across several years so the price doesn't come down. Besides, theres a million other costs associated other than labour and parts, such as energy used, marketing, management fat, car shows, destructive testing, so on and so forth. Oh yeah, and last but not least they also want to make a profit.
This is a completley wrong example!! The magnets are providing an upwards force, however placing something on a table does the exact same thing. The table pushes back on the object with equal force. It sits still and does nothing.
The magnets are doing the exact same thing. If they were able to levitate themselves against gravity and climb to the moon, that would mean some kind of energy is actually being put out. But in this example they are putting out no more energy than an ordinary table exerts back to an object placed on top of it, which is net 0.
I think the poster meant energy as in the chemical energy or extracting atomic energy that is inherently there. magnets are sources of potential energy, it takes a lot of power to seperate them but when you put them together again u get that force in attraction back, so the net energy is 0.
Unlike gas, which you can light with a match and get a lot more energy from, that's what the origanol poster was trying to say.
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He did it using HF, i was pointing out it was going to be extremely hard doing it with UHF. It's not that hard establish long range at HF. http://wiki.whatthehack.org/index.php/Wifi_over_50 0_km%3F_Impossible%3F
I dont want to be one of those ppl that sits around and tells other what they cant do, BUT, im really skeptical on the concept that these guys will lug two huge 8 foot dishes up a 15,000ft mountain to establish a wifi link.
So I stand corrected, it can be done by climbing a couple 15,000 foot mountains and assuming the conditions you mentioned exist. But thats an extradonary feat, and although I think its very cool that they were able to get 125 miles, i just don't see them going through that effort just to get a couple laptops talking to each other.
There is just no way they can maintain 300 miles/480km without using relay stations. Multi megawatt FM stations cannot get that range simply because the curvature of the earth causes the signal to disappear into space before reaching its destination. 125/200km is about the maximum range that is possible on frequencies much higher than HF, even with captain picard's private satellite link to france they are not going to get 480km out of it.
This happens because of what is referred to as intermodulation or just intermod. Even though the phone's frequency is waay out of the frequency of the audio transisters in your speaker's amp, the power level at that short distance is enough to overload the transisters and push them into what is called the non-linear region. In this region, the transister acts like a diode or am radio and rectifies the signal from the cell phone. As such many different frequencies are produced inside the transsiters, some of which fall into the audio spectram that you hear.
Not likely, even if the roof was covered with panels they would only produce a max of 160 -190 watts. By the time it gets to the pelties there will be some cooling effect of about 80 watts but it would be way too small to ever cool down a car. There is one really cool thing about this project that no one has mentioned. Instant heat in the winter time!
Then you'll have people showing up to riots and causing problems so they could get high for free.
TV resolution is 320x240.
"Recently I took apart a working 200MB Western Digital HDD, only because the cover would make a useful screw holding tray while working on my bike, and that use became more valuable to me than 200MB of storage ! It was a bit sad to pull apart a still working drive of such age." I read that as 200GB, and read it several times over thinking WTF is wrong with this guy's head taking apart a 200Gig drive to store bike screws in.
This won't be needed if you are using a Commodore 128 and have access to the Renumber command, which does all of the above automatically.
Corporation are out to make Money?? HOLY SHIT BATMAN, THATS FUCKING INGENIUS!!!! Wow... What a shock. All this time I thought corporations were for helping children living in africa. I dont suppose lawyers are out to make money, too? Only you would know a thing like that Shirlock!!!
I find it a bitch to use on any keyboard.
DC isn't as affective at degaussing as AC. For example, all monitor degaussers work at AC. So does the erase head on tape decks, it is typically connected to a 400khz oscillater. The reason is, for something to be magnetized, it has to be exposed to a changing magnetic field.
I would just add that another way to defeat these algorathims is to just type in random stuff for the serial, and IME after the 10th try it manages to pass and the software continues.
If I was really serious about getting long uptime, cheap, here's what i would do: 1. Plus the PC into an inverter, permanently. 2. Run the inverter from a series of deep cycle batteries. 3. Have a good battery charger running constantly. 4. Profit! This way, the power can go out and come back in as many times as it wants, it can surge or brown out and the PC wont feel a thing. Plus, its infinitley expandable, you can use a whole bank of marine batteries and a 40 amp charger wont break a sweat.
ATI TV wonder really sucks, i have one, also seen the all in one wonder those suck as well. Too many compatibility problems, piss poor drivers, just not a good product at all.
I have always wondered about that. Everyone today has a "digital" cellphone, that supposedly sends everything up in digital packets, so how come so many people with scanners can still tune into converstations?
I think the problem has been that car manufacturers have been using the difficult and expensive solution of developing complex technology to combat the problem. What they should do instead is redesign all the roads so cars are driving down hill all the time, thus dramatically increasing fuel economy on all vehicles regardless of type.
In addition, the monitor still requires 120V AC. It would be cool though if all PC power supplies had an auxillary 9-12VDC input.
This idea would probably not work. The spinning disk would probably have to weigh several hundred pounds in order to store enough energy to function as a generator. In addition it's extremely hard to get something that heavy to spin at 5000 rpm and its even harder when its derived from 60hz AC. I guess what i'm saying is that it probably wont work that well. :=)
That may have been the case at first but later in the pentiums all it did was turn or the secondary cache to make the cpu seem like its running at a lower clock.
This is not true. Most cars will reset the light automatically after the fault does not reoccur for some time. For example, on my maxima, after 40 drive cycles if the fault doesnt happen again it will reset the light and pretend nothing happend.
You raise a good point on bulb life. I think if i were to ever build/buy a projector, i would put in some sort of a secondary cooling system. Maybe replace the stock fan with a more powerful one. Or add a metal heat sink to the bulb. Either one will increase life, I think. I'm sure there is some nut case out there already that has installed water cooling.
Also buying a very powerful bulb and then running it at a lower power level (somehow) will yield a big boost in its rated lifestand.
I think the assumption you make is that they get all their money back for tooling the factory, engineering the product and marketing in the first year, which may not be the case. They might be spreading it across several years so the price doesn't come down. Besides, theres a million other costs associated other than labour and parts, such as energy used, marketing, management fat, car shows, destructive testing, so on and so forth. Oh yeah, and last but not least they also want to make a profit.
This is a completley wrong example!! The magnets are providing an upwards force, however placing something on a table does the exact same thing. The table pushes back on the object with equal force. It sits still and does nothing.
The magnets are doing the exact same thing. If they were able to levitate themselves against gravity and climb to the moon, that would mean some kind of energy is actually being put out. But in this example they are putting out no more energy than an ordinary table exerts back to an object placed on top of it, which is net 0.
I think the poster meant energy as in the chemical energy or extracting atomic energy that is inherently there. magnets are sources of potential energy, it takes a lot of power to seperate them but when you put them together again u get that force in attraction back, so the net energy is 0.
Unlike gas, which you can light with a match and get a lot more energy from, that's what the origanol poster was trying to say.