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Tell me how many nickels it takes to depress the keys on your keyboard! - Page 7

post #61 of 267
12/5/10 at 10:26pm
Sidewinder X6 55g on the "K" key, 65g on the "Space".

Nostromo N52: 80g on the main keyset. (Makes me want to do a switch swap)
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post #62 of 267
12/6/10 at 2:39am
If you weigh with some foreign coin currency you must give the weight as a number of them, because one digit of the converted weight in grams is not significant. If someone says 65g when he measured with nickels it could be 60.01g, so 65g suggest a false sense of precision. Since they coins aren't stacked perfectly across the center of the key, the variation of the downward force vector will make it even less accurate.
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post #63 of 267
12/6/10 at 5:56am
Quote:
Originally Posted by ripster View Post
80g. I think rubber domes are often more stiff than people think. I've seen some numbers even higher.

Hope you glued those. Or you should start playing this game.
Nope, just put them on one by one. I guess it's not as hard as it sounds.
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post #64 of 267
12/6/10 at 8:39am
Quote:
Originally Posted by webwit View Post
Does that translate to picking some random coin from a random country representing a tiny fraction of the world population where they haven't even got simple rights such as free speech, and corporations execute state censorship? If only there was some metric system of unity.. hmm I KNOW.. what about grams?
Last i checked force was in newtons not in grams.

and also last i checked most nickels were majorly within the accuracy of 5grams compared to the accuracy used for mechanical switches, thus rendering any more accurate a test just accurate falsehood.

and lastly last time i checked there was a higher margin of error in assuming the earths gravitational pull is an exact amount everywhere in the world than there was error in mass of nickels.

in short your unit of measurement is wrong
you're using flash accuracy
and you seem to think gravity is constant [and at 10 m/s^2 no less)
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post #65 of 267
12/6/10 at 9:01am
Quote:
and also last i checked most nickels were majorly within the accuracy of 5grams compared to the accuracy used for mechanical switches, thus rendering any more accurate a test just accurate falsehood.
In a similar story, you can't measure bricks with a gram scale, because bricks have variable weight. Fail. Perhaps you should re-read the high school stuff about significant figures. It is not about the bricks. But if you only want to measure all types of bricks with one type you can find in a small area on earth, as a matter of inaccurate reference, be my guest.

I like how you try to argue for simplicity and at the same time try to impress with Newtons. Now for your homework assignment, please calculate the the difference between 13 nickels pressing down on a key on the North Pole, and a similar setup on the equator. And in your next assignment, you can tell us about the difference between mass and weight and about your experience of using nickels in Space, out of reach of the gravitational pull of the Earth.
Edited by webwit - 12/6/10 at 9:05am
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post #66 of 267
12/6/10 at 9:30am
As I mentioned earlier here under "Caveats" (look it up - it's not a South American Rodent) :
Quote:
1) Grams does not equal force. But it's close enough to CN for our purposes (1 cn = 1.019716213 gm-force).
Meanwhile In Australia

Edited by ripster - 12/6/10 at 9:33am
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post #67 of 267
12/6/10 at 9:44am
Quote:
Originally Posted by ripster View Post
1) Grams does not equal force. But it's close enough to CN for our purposes (1 cn = 1.019716213 gm-force).
Uhm, how many American nickel-force is that?
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post #68 of 267
12/6/10 at 11:09am
Just did a test on some nickles just to provide some evidence that it is not as inaccurate as it might seem.

Mass of 4 nickels = 20g...avg. of 5g/nickel



Mass of 4 nickels = 20g...avg. of 5g/nickel



Mass of 3 nickels = 14g...avg. of 4.666g/nickel (must have 1 random nickel that is closer to 4g, than 5g)



Mass of 15 nickels = 74g...avg of 4.933g/nickel



So, while yes, there is some error in this way of measuring the amount of force required to depress a key, it isn't much. Once you get up to 15 nickels we are only talking about 0.134% error. So, the less nickels it takes, the less accurate the results might be. Over 10 nickels it should be pretty accurate (not nearly +- 10%).

Also, I know the scale only has a sensitivity of 1g, but at 20g each gram is 5% of the total, which means that in every test there is less than 5% error because it would show 19g or 21g if it was more than 5%.




Edited by turbocharged - 12/6/10 at 11:13am
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post #69 of 267
12/6/10 at 11:27am
I think your scale is off because of all the dirt.

You put dead animals on that thing or something?
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post #70 of 267
12/6/10 at 11:48am
This actually makes me want to buy a mechanical keyboard now, Since blues are around 45g till activation and buckling springs are around 70~ i think.

I will try what the rave is about.
For those who want to try with me
http://www.overclock.net/online-deal...-keyboard.html
Are dell black alps mechanical ~$20 shipped.
Edited by lilraver018 - 12/6/10 at 11:56am
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