But if you convert the data to digitial information right on the electrode, you can use the off-the-shelf wireless networking transciver to move the data and not suffer from the shortcomings of analog wireless transmission, as well as the noise problems associated with conventional EEG cabling schemes?
Yeah, shortcutting around the 20Hz filter seems a little silly. I did a fair amount of work with this EEG business not too long ago, creating an ad-hoc sensor network, indegrating ADC directly on the electrode. (Available here) These ADCs cost less than 20 bucks a channel, (total, with COM and everything) and in even modest quantites could be made for much much cheaper. I think there is simulaneously too much excitement over the possibilites of EEG, and too little work done to further the technology for both medical and nonmedical purposes.
I think in this case a microcontroller was needed... what are the odds that the pulse train coming from your mouse, given the deg/step of the steppers is adequate for turning those dials in a manner that makes for an easy to operate etch-a-sketch? More likely, some sort of scaling (read: counting) needs to take place, which the microcontroller probably handles nicely.
Thats what I was going to suggest (damn proxy at work is BLOCKED from slashdot:/)
You could hijack a dime store laser pointer for the gun, and use a lens to increase the beam width. Then replace the infrared phototransciever with an ordinary photodetector, and blank it out with a cheap red gel.
Those laser challenge thingies are pretty crappy, I've never understood why they don't just use real lasers... it's nothing but a damn IR diode and a lens to increase the beam width.
good luck!
I find that for a task like this, motors from those "power wheels" vehicles (you know, those little motorized cars kids can drive around in) are the best way to go. They've got a good deal of torque, modest speed, and they're fairly easy to control: a pair of LMD18200s (from National I think?) will hold up just fine under this kind of load. These motors can be had surplus for like 8 dollars a piece if you remain vigilant. Even if an automated avoidance system is out of your league, you could get some walkie talkies and put you together a bitchin RC system for under 30 bucks, exempting the cost of your drive batteries. For those you could go a number of ways... I'm partial to electric wheelchair batteries, but those can get pricey new... a smaller car battery may be the best bet, wouldn't run you too much, and you could get an off the shelf charger for cheap.
That's why java is so much faster to learn if you already know C... in C++, if you don't feel like learning, you can just fall back on C as a crutch. I'm not saying that having C as a subset of C++ is a bad thing, I certainly use it *all* the time, however, having it there doesn't help you to learn C++ any faster (and in fact slows you down!)
I disagree... if I'm not yet "comfortable" with java (or C, or ML or whatever) but I can write what I'm doing to be twice as fast in half the code, I should sure as hell get comfy real fast. To say "xyz is a couple 'seconds' faster doesn't matter" depends on the context. If I'm doing an 8 hour render, a couple seconds is nothing, but if I'm waiting for google to load, a couple seconds is an eternity.
I think that adding any kind of IE compatibility adapter would radically alter the way firefox does business, and would definitely cause a "noticeable delay" in your browsing experience. As we move on to slimmer faster browsing technologies, we have to be ready to leave the proprietary quirks and unecessary bloat of the old stuff behind. Nobody ever complains because a DVD-ROM drive doesn't have a "floppy disk compatibility mode"
No, simply noting that saying "maybe you have asperger's syndrome" is a bit like saying "maybe you have down syndrome" Asperger's syndrome is a social disorder, kin to autism, and is very debilitating socially, which is certainly not what was described. And though it's possible, I maintain, "no way."
You remind me a bit of me. You're not exceptionally bright, you just don't care. The misconception is caused by the fact that most people who don't care, don't care because they're rather dull witted. So to be more clear, you _are_ uniquely bright, only you're merely bright for the demographic that doesn't give a shit, rather than the population on the whole. It's a rough job though, not giving a shit. It's not to be taken lightly. At college, you're going to need to come to grip with the fact that you don't care, and make sure you're ok with that. Leading a life of mediocre accomplishments isn't so bad, as long as you're willing to accept the fact that you are a deplorable mass of dead weight, that does only what is necessary to stay above water. Not giving a shit is a big responsibility...
But it's not a lot of work. And that rocks.
All these assumptions are made presuming that the battery will be recharged by a convential current flow recharger. There is nothing that suggests that the charging isn't done with some electric/magnetic field mechanism instead (read: alignment of magnetic domain, redistribution of charge in a lattice, etc...)
I suspect the first priority of the technology *is* for paralyzed people... EEG systems have been helping injured patients redevelop their muscular abilities since the sixties, but games are perhaps the best form of biofeedback to be used in training a patient to manipulate his or her own brainwaves. I'm developing a similar system that is scalable and flexible, as to handle everything from video games to the treatment of ADHD, autism, paralysis, etc...
Slashdot Mirror
I'm gonna wait for "Windows XP: Reduced resource consumption edition." [/troll]
But if you convert the data to digitial information right on the electrode, you can use the off-the-shelf wireless networking transciver to move the data and not suffer from the shortcomings of analog wireless transmission, as well as the noise problems associated with conventional EEG cabling schemes?
Some of this work was done at North Carolina State university, in conjunction with some work overseas (with, as you said, mixed success)
Yeah, shortcutting around the 20Hz filter seems a little silly. I did a fair amount of work with this EEG business not too long ago, creating an ad-hoc sensor network, indegrating ADC directly on the electrode. (Available here) These ADCs cost less than 20 bucks a channel, (total, with COM and everything) and in even modest quantites could be made for much much cheaper. I think there is simulaneously too much excitement over the possibilites of EEG, and too little work done to further the technology for both medical and nonmedical purposes.
I think in this case a microcontroller was needed... what are the odds that the pulse train coming from your mouse, given the deg/step of the steppers is adequate for turning those dials in a manner that makes for an easy to operate etch-a-sketch? More likely, some sort of scaling (read: counting) needs to take place, which the microcontroller probably handles nicely.
Thats what I was going to suggest (damn proxy at work is BLOCKED from slashdot :/)
You could hijack a dime store laser pointer for the gun, and use a lens to increase the beam width. Then replace the infrared phototransciever with an ordinary photodetector, and blank it out with a cheap red gel.
Those laser challenge thingies are pretty crappy, I've never understood why they don't just use real lasers... it's nothing but a damn IR diode and a lens to increase the beam width.
good luck!
Yeah, you gotta remember, some stuff *is* actually easy in windows. btw, earl grey sucks.
I find that for a task like this, motors from those "power wheels" vehicles (you know, those little motorized cars kids can drive around in) are the best way to go. They've got a good deal of torque, modest speed, and they're fairly easy to control: a pair of LMD18200s (from National I think?) will hold up just fine under this kind of load. These motors can be had surplus for like 8 dollars a piece if you remain vigilant. Even if an automated avoidance system is out of your league, you could get some walkie talkies and put you together a bitchin RC system for under 30 bucks, exempting the cost of your drive batteries. For those you could go a number of ways... I'm partial to electric wheelchair batteries, but those can get pricey new... a smaller car battery may be the best bet, wouldn't run you too much, and you could get an off the shelf charger for cheap.
CELL PHONES RIVALING PCS WITH 3D GRAPHICS???
I see this only as a good thing... finally a driving force to move pc gaming into 4D!!!!!
That's why java is so much faster to learn if you already know C... in C++, if you don't feel like learning, you can just fall back on C as a crutch. I'm not saying that having C as a subset of C++ is a bad thing, I certainly use it *all* the time, however, having it there doesn't help you to learn C++ any faster (and in fact slows you down!)
I disagree... if I'm not yet "comfortable" with java (or C, or ML or whatever) but I can write what I'm doing to be twice as fast in half the code, I should sure as hell get comfy real fast. To say "xyz is a couple 'seconds' faster doesn't matter" depends on the context. If I'm doing an 8 hour render, a couple seconds is nothing, but if I'm waiting for google to load, a couple seconds is an eternity.
If you know C, I would still say that Java is faster to learn than C++
I think that adding any kind of IE compatibility adapter would radically alter the way firefox does business, and would definitely cause a "noticeable delay" in your browsing experience. As we move on to slimmer faster browsing technologies, we have to be ready to leave the proprietary quirks and unecessary bloat of the old stuff behind. Nobody ever complains because a DVD-ROM drive doesn't have a "floppy disk compatibility mode"
Yeah, well your mother is a bitch.
No, simply noting that saying "maybe you have asperger's syndrome" is a bit like saying "maybe you have down syndrome" Asperger's syndrome is a social disorder, kin to autism, and is very debilitating socially, which is certainly not what was described. And though it's possible, I maintain, "no way."
I love OCaml! I suppose it depends on what you're rapidly developing, but it is quite a nifty language. Man I'm drunk.
You remind me a bit of me. You're not exceptionally bright, you just don't care. The misconception is caused by the fact that most people who don't care, don't care because they're rather dull witted. So to be more clear, you _are_ uniquely bright, only you're merely bright for the demographic that doesn't give a shit, rather than the population on the whole. It's a rough job though, not giving a shit. It's not to be taken lightly. At college, you're going to need to come to grip with the fact that you don't care, and make sure you're ok with that. Leading a life of mediocre accomplishments isn't so bad, as long as you're willing to accept the fact that you are a deplorable mass of dead weight, that does only what is necessary to stay above water. Not giving a shit is a big responsibility... But it's not a lot of work. And that rocks.
No way, aspergers is a much more debilitating disorder than what he's described.
All these assumptions are made presuming that the battery will be recharged by a convential current flow recharger. There is nothing that suggests that the charging isn't done with some electric/magnetic field mechanism instead (read: alignment of magnetic domain, redistribution of charge in a lattice, etc...)
I suspect the first priority of the technology *is* for paralyzed people... EEG systems have been helping injured patients redevelop their muscular abilities since the sixties, but games are perhaps the best form of biofeedback to be used in training a patient to manipulate his or her own brainwaves. I'm developing a similar system that is scalable and flexible, as to handle everything from video games to the treatment of ADHD, autism, paralysis, etc...
I hacked my kitchen sink via an electric screwdriver, a cheap mouse, and a fax machine to produce the POWER SINK DUN DUN DUHHHHHH... http://gogglemarks.homelinux.net/cgi-bin/display.c gi?file=projects/powersink