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 19 More: Spiffy, Museum of Science
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3633 clicks; posted to Video » on 05 Apr 2014 at 7:46 PM (3 years ago)   |   Favorite    |   share:    more»

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Give us a round of applause anyway!

That sucked.

I'll watch again when they kill the continuous scroll...

Cute, but a circuit isn't a computer.

murray208: Cute, but a circuit isn't a computer.

And he's not British.

This video gives a much better explanation of how each domino logic gate works:
http://youtu.be/lNuPy-r1GuQ

murray208: Cute, but a circuit isn't a computer.

The problem with domino machines is that they are not reusable. You have to rebuild them for each computation. This is sort of analogous to a method for calculating the average penis size in Britain that has the first steps of cutting off all penises and laying them down in a line.

A better and simpler model of a computer can be constructed with a marble machine, particularly if it has motors to lift back the marbles back to the top.

It is much simpler than the domino version and it can be reused without reconstruction.

I've  seen some very elaborate marble machines some of which are said to simulate some aspects of computers though I've yet to see a full stored program Turing complete marble machine.

HairBolus: murray208: Cute, but a circuit isn't a computer.

The problem with domino machines is that they are not reusable. You have to rebuild them for each computation. This is sort of analogous to a method for calculating the average penis size in Britain that has the first steps of cutting off all penises and laying them down in a line.

A better and simpler model of a computer can be constructed with a marble machine, particularly if it has motors to lift back the marbles back to the top.

It is much simpler than the domino version and it can be reused without reconstruction.

I've  seen some very elaborate marble machines some of which are said to simulate some aspects of computers though I've yet to see a full stored program Turing complete marble machine.

That marble adding machine is cool... until you realize that to read the results you need to add, which kind of defeats the purpose it was built for in the first place since the machine doesn't do that addition for you - presumably necessitating the building of another, larger machine. I mean, unless the purpose is to build a completely pointless but clever machine, in which case mission accomplished.

If you can't even grow a decent moustache, growing your hair out everywhere else will not compensate.  Only women should tuck their hair behind their ears.

Beardy Red is adorable. And I thought that video was very cool. So my taste is obviously in question.

mongbiohazard: That marble adding machine is cool... until you realize that to read the results you need to add, which kind of defeats the purpose it was built for in the first place since the machine doesn't do that addition for you - presumably necessitating the building of another, larger machine. I mean, unless the purpose is to build a completely pointless but clever machine, in which case mission accomplished.

No, the marble machine provides the output in binary notation. You only need to perform an additional addition if you want to read the result in a different radix. The base 10 numbers at the top are only there to help the operator remember where to place the marbles.

studebaker hoch: Give us a round of applause anyway!

That sucked.

I found it kind of like Apollo 13, a successful failure. He predicted the error that occurred, and it was nice physical analogical demonstration of a real issue in integrated circuit production: the bleed-over of one circuit to another at very small scales. I'm not an electrical engineer but as a demo it was a functional failure but a theoretical demonstrative success.

ABQGOD: mongbiohazard: That marble adding machine is cool... until you realize that to read the results you need to add, which kind of defeats the purpose it was built for in the first place since the machine doesn't do that addition for you - presumably necessitating the building of another, larger machine. I mean, unless the purpose is to build a completely pointless but clever machine, in which case mission accomplished.

No, the marble machine provides the output in binary notation. You only need to perform an additional addition if you want to read the result in a different radix. The base 10 numbers at the top are only there to help the operator remember where to place the marbles.

So... either way, what you're saying is, to use the machine to do math you have to use math yourself both on the output AND input sides of it.

Don't get me wrong, it's a cool machine... It's just self-contradictory in function.

whither_apophis: I'll watch again when they kill the continuous scroll...

Between the continuous scroll and insipid techno-beat I started to feel like an idiot. Made it about a minute in.

John Percival Hackworth is not impressed.

I really hate how everyone is trying to define switches and gates as computers (especially in minecraft).  Yes, technically anything that has some sort of logic can be called a computer, but really this is just carefully placed dominoes representing circuits.  By this definition, if I throw a ball at a pole, by mere chance it might bounce to the left or to the right., I can call this pole a switch gate.

ABQGOD: No, the marble machine provides the output in binary notation. You only need to perform an additional addition if you want to read the result in a different radix.

Huh?
It is non trivial to convert from binary to decimal. I once had to drive a display on a computer without hardware multiplication/division. To convert a positive number I set up the following table and then counted how many times I could subtract the entries without the number going negative.

0: 1111101000 (1000)
1: ^Y00 (100)
2: ^B10 (10)
3: 0000000001 (1)

HairBolus: Huh?
It is non trivial to convert from binary to decimal. I once had to drive a display on a computer without hardware multiplication/division. To convert a positive number I set up the following table and then counted how many times I could subtract the entries without the number going negative.

0: 1111101000 (1000)
1: ^Y00 (100)
2: ^B10 (10)
3: 0000000001 (1)

Yours is the exactly the kind of extended answer that I was trying to avoid. I was merely trying to make the point that computers only operate in binary - even the representation of decimal numbers is a series of binary calculations resulting in the particular arrangement of pixels resembling the answer in a human-readble format.

mongbiohazard: So... either way, what you're saying is, to use the machine to do math you have to use math yourself both on the output AND input sides of it.

No. He's saying that the marble adding circuit has its inputs and outputs both in binary. Your inability/unwillingness to count in binary is not the circuit's problem.

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