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146 Comments
- ChuqAU, on 07/19/2008, -1/+111I'd like to see him build a NOT gate :)
- daniking, on 07/19/2008, -1/+63This should be presented to kids in elementary school. I remember setting up dominoes from time to time, but never anything beneficial.
Groups of 3... race to create the most working logic gates in one hour. Winners get candy. Learning IS fun. - arjie, on 07/19/2008, -1/+461 XOR 1 = 0
1 XOR 0 = 1
0 XOR 1 = 1
0 XOR 0 = 1
If 1 is fallen, and 0 is standing, then construct a XOR gate and always hit the second one when beginning calculation. There you go, NOT gate. - gkskillz, on 07/19/2008, -1/+46I think you meant, 0 XOR 0 = 0, but I'm not going to bury you since you are correct about the NOT gate.
- XeN0cidE, on 07/19/2008, -14/+38Someone stole this from Reddit.
I wonder who? - topgun553, on 07/19/2008, -24/+47My Digg Logic:
(Do I Like the Article/Video) & (is Not From MrBabyMan) = dugg
This Video:
1 & 0 = buried - john2kx, on 07/19/2008, -0/+20Is it confusing, though? I've seen 9 year olds grasp the concept.
For each gate, you have 2 inputs and one output.
For an AND gate, both inputs need to be true for the output to be true, else, the output is false.
For an OR gate, only one input needs to be true (but it's ok if both are true) for the output to be true.
For an XOR gate, only one input must be true (NOT both, and NOT none) for the output to be true.
That's seriously it. Nothing more. - webkami, on 07/19/2008, -1/+21Sadly, most diggers use OR gate on this one.
- spammishking, on 07/19/2008, -0/+17Or some of us don't even realize who posted it till we are subjected to the endless tirades of I hate Mr Babyman complainers
- batmanz, on 07/19/2008, -3/+17But can it run Crysis?
- Pinkertinkle, on 07/19/2008, -15/+28MrBabySpam
- lukemit, on 07/19/2008, -5/+17I guess I'm not nerdy... ah hem... I mean "cool" enough to get it...
- inactive, on 07/19/2008, -7/+18But will it run Linux?
- im2emo4myshrt, on 07/19/2008, -2/+13I dugg because he moved his hands so fast!
- smoorman1024, on 07/19/2008, -1/+11Very interesting but everything can only go from up to down. Can anyone think of a practical way to build a nand or a nor?
- halfdirt, on 07/19/2008, -1/+11Now make a dominoes Turing Machine!
- Duncster, on 07/19/2008, -1/+10Yeah... post something he finds on Reddit.
- VinnieDaMac, on 07/19/2008, -0/+9Creativity, but extremely boring watching someone set up dominoes.
- halfdirt, on 07/19/2008, -3/+12Almost all of us don't care about any submitter on this site, not even a little bit.
- NeonGod, on 07/20/2008, -0/+7This is one of those submissions that is targeted for the geeks. If you're not a CompSci or Engineering grad, move along and don't feel bad. You're not stupid if it doesn't make sense. It's for us and it's fuggin awesome (though I must say that guy has too much time on his hands) :)
- NeonGod, on 07/19/2008, -0/+7http://en.wikipedia.org/wiki/Logic_gate
- Futurejunior, on 07/19/2008, -1/+8From the description "Replacement for TTL and CMOS."
Hilarious - jull1234, on 07/19/2008, -1/+7the XOR was positively riveting.
- Retrospekt, on 07/19/2008, -1/+7I'd be happier with slightly fatter smart americans then slightly skinnier idiot americans.
- Alexio, on 07/19/2008, -0/+5What about setting up these logic gates with a not too powerful spring attached to each domino, which would allow them to self-righten after each cycle? Hopefully, gravity would still have enough force for the end output to make it. Then we would see domino turing complete machines indeed. Now to figure out how to make dynamic memory...
- NathanielJ, on 07/19/2008, -0/+5It's not unusual to have fun with dominoes.
- john2kx, on 07/19/2008, -0/+5Simple - used mixed logic.
Build a regular AND or OR gate, operate as normal, and if the output dominoes fall, consider the output false, and if they're still standing, consider the output true. - NathanielJ, on 07/19/2008, -0/+5Just kick the table.
- pak314, on 07/19/2008, -0/+5Actually there is such a thing as Domino Logic Gates.
http://en.wikipedia.org/wiki/Domino_logic - netneutrality, on 07/19/2008, -1/+6Super creative! If only it worked more than once, I could see primitive programs running on that!
- matroosje, on 07/19/2008, -0/+4Dugg for Mozart
- TheyHate, on 07/19/2008, -0/+4then they lost everyone's respect when they released that Oreo Pizza to the public
- ijacker, on 07/19/2008, -1/+5my dad does exactly that
the result? fat kids who are good @ science - aadnk, on 07/19/2008, -0/+4You can construct a NOT-gate by using the Xor-gate (as mentioned by arjie above):
In 1: In 2: Out:
0 Xor 0 = 0 (1)
0 Xor 1 = 1 (2)
1 Xor 0 = 1 (3)
1 Xor 1 = 0 (4)
If you look at (2) and (4), Xor operates just like the Not-gate on Input 1. Thus, to make Not, you just have to Xor the value with one, supplied from the initial domino (as it's trivial to replicate a domino fall/signal). - inactive, on 07/19/2008, -1/+5A nand and nor gate would require a domino to fall over without an input, so that's not really possible
- Ardentfrost, on 07/19/2008, -1/+5In for 4 bit adder!
- inactive, on 07/19/2008, -0/+4Great. Waiting for synchronic counters.
- TsuruchiBrian, on 07/19/2008, -0/+4The problem with domino gates is the dominoes can't get back up.
This is fine for or gates and and gates because for these gates you can model the problem as merely requiring some threshhold for knowing when it is time to trigger the output (any inputs triggered or all of them)
For the Xor gate it appeared that both inputs had to be triggered at precise times to cause the 1^1=0 result. If you timed it wrong, the answer would be 1^0 = 1 but then that second input propagates and you find out it's actually 1^1=1 (because you can't turn the output back into a 0). - Red1000, on 07/19/2008, -1/+5Crap, you beat me to it!
- Arngautr, on 07/19/2008, -1/+5Adding a clock and one gate per clock 'tick' would make this work. But that may be considered cheating.
- inactive, on 07/19/2008, -1/+5A few more boxes of dominoes and you have a celeron.
I want domino DSP! - jull1234, on 07/19/2008, -0/+4err warning: assignment inside conditional
- FeargusMcDuff, on 07/19/2008, -0/+3Can anyone figure out a nand gate?
- NathanielJ, on 07/19/2008, -0/+3Yeah, your comment was infinitely more insightful than "music was gay".
- Elsewhere42, on 07/20/2008, -0/+3I think I just had a Geek-Gasm.
- Paranoidmarvin, on 07/19/2008, -0/+3That was actually quite clever
- moolcool, on 07/19/2008, -0/+3I hope amazon hasnt sold out of the DDL cookbook (domino domino logic)
- f4nt0m4s, on 07/20/2008, -0/+3Dugg for being geeky and cool. I was half expecting to see a half-adder or a flip-flop :p
It's hard to imagine that the modern processor, with over a billion transistors, was built on a foundation using simple logic circuits. - NathanielJ, on 07/19/2008, -0/+3I foresee vegr's comment ending up on FailBlog.
- TheCoreh, on 07/20/2008, -0/+3He's building logic gates out of Dominoes. Logic gates are the base of modern digital electronics. Each gate has two (or more, but let's consider just two) inputs and one output. Inputs and outputs are digital signals and can be either 1 (on) or 0 (off). Depending on the type of gate, certain input combinations will provide certain outputs.
The types of logic gates shown are AND, OR, and XOR.
AND outputs 1 if the first AND the second output are 1. So:
1 AND 1 = 1
1 AND 0 = 0
0 AND 1 = 0
0 AND 0 = 0
OR outputs 1 if the first OR the second input are 1. So:
1 OR 1 = 1
1 OR 0 = 1
0 OR 1 = 1
0 OR 0 = 0
XOR, which stands for exclusive or, will output 1 if either the first input or the second input are set to 1, but will output 0 if both or none are set to 1.
1 XOR 1 = 0
1 XOR 0 = 1
0 XOR 1 = 1
0 XOR 0 = 0
In his domino-based logic gates, the digital signals are the falling dominoes. Notice how on the OR gate, the last domino (output) will fall if either the left or right input dominoes fall. And on the AND gate, it will only fall if both fall. -
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