 | | Re: LEGO design patterns... you know, there's a book in that, I'm sure of it!
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Hello, let me reply to a number of related postings at once here ... (...) Not being exactly the GUI expert you may have envisioned, I think the GUI would need to offer sensible categories and potentially more powerful mechanisms to really find the (...) (21 years ago, 26-Jun-03, to lugnet.technic)
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| | Re: A better full adder!
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(...) Ah... it took me a while to figure out what you were doing, but I see now... (reviewing your pics) If your inputs to the XOR were A and B, you use A to drive the piston, and require the presence of both B and NOT B to make the piston move. I (...) (21 years ago, 26-Jun-03, to lugnet.technic, lugnet.robotics)
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| | Re: A better full adder!
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(...) AND takes 1 piston + 1 switch using your design. XOR takes 1 piston + 2 switches using my design. OR takes 1 piston + 2 switches using my design. But AND and XOR can be done using the same piston, so 1 piston + 3 switches gets you a half (...) (21 years ago, 26-Jun-03, to lugnet.technic, lugnet.robotics)
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| | Re: A better full adder!
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(...) Finally I can compete again! ;^) I can do a half adder with 1 piston and seven switches, plus you get dual polarity pressure. Three switches for AND and four for XOR. This says that I can do single pressure logic line with one piston and three (...) (21 years ago, 26-Jun-03, to lugnet.technic, lugnet.robotics)
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| | Re: A better full adder!
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(...) It sure is. Thanks. Using the same pattern (setting up specific switches "backwards"), I can do a half adder with two pistons and 4 switches (2 switches on each piston). Again, no need for inter-piston bracing, just the requirement that a (...) (21 years ago, 26-Jun-03, to lugnet.technic, lugnet.robotics)
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| | Re: A better full adder!
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(...) Kevin (21 years ago, 26-Jun-03, to lugnet.technic, lugnet.robotics)
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| | what parts are left over after building 8448 gull wing?
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Trying to sort out all the parts that should be in a 8448 supercar set. I have built the gull wing version. What parts should I have left over, if any, that are needed to build any of the other versions? (21 years ago, 26-Jun-03, to lugnet.technic)
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| | Re: Mechanical Memory for Computing
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(...) Actually a byte is whatever you define it to be - a nibble is generally half a byte, and a word is generally 2 bytes. I haven't seen a machine using 4 bit bytes, but I've seen 8, 16, 32 and 64. And I'm sure there are other weird ones floating (...) (21 years ago, 26-Jun-03, to lugnet.technic, lugnet.robotics, lugnet.build, lugnet.off-topic.geek)
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| | Re: Mechanical Memory for Computing
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Very cool design. (...) Question: Why are you calling 4 bits a byte? 4 bits is a nibble, while 8 bits would be a byte. Obviously the design can be extended to 8 bits like you mentioned. They you would have your byte. Michael (21 years ago, 26-Jun-03, to lugnet.technic, lugnet.robotics, lugnet.build)
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| | Re: A better full adder!
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Hey, that's great! Now it's nice and symmetrical with 3 columns of 4 switches... something satisfying about that. :-) Now, all I need is 4 more switches and I can build it! Cheers, Mark (R) (...) (21 years ago, 26-Jun-03, to lugnet.technic, lugnet.robotics)
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| | A better full adder!
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I realized this afternoon that I could cull a switch from my earlier design. It's now down to 12 switches from 13. 4 switches ganged onto each piston. The wiring schematic is here: (URL) on how to interpret the diagram can be found in an earlier (...) (21 years ago, 26-Jun-03, to lugnet.technic, lugnet.robotics)
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| | Re: Mechanical Memory for Computing
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(...) About half-way down this page (URL) is a diagram and short discussion of a possible design for molecular level RAM. The diagram shows 2 memory cells of 2 bits each and the mechanism to select which memory cell is being read/written. In my LEGO (...) (21 years ago, 25-Jun-03, to lugnet.technic, lugnet.robotics, lugnet.build)
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| | Re: Mechanical Memory for Computing
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(...) <SNIP> (...) Do you happen to have any links to the molecular RAM design you are referencing? It would be very cool to compare and contrast your excellent model with the "real world" counterpart. Jona (21 years ago, 25-Jun-03, to lugnet.technic, lugnet.robotics, lugnet.build)
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| | Re: Mechanical Memory for Computing
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(...) I concur. It's only a matter of time now before someone figures out how to build Babbage's Difference Engine from Lego. Becky (21 years ago, 25-Jun-03, to lugnet.technic)
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| | Re: Mechanical Memory for Computing
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Brilliant! Positively brilliant! >> Mark (21 years ago, 25-Jun-03, to lugnet.technic, lugnet.robotics, lugnet.build)
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| | Mechanical Memory for Computing
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Inspired by the recent pneumatic computing thread I have created some LEGO mechanical memory. It is an adaptation of a possible design for molecular level RAM. The folder is at (URL) with details below. In this overall view of it (URL) the sliding (...) (21 years ago, 25-Jun-03, to lugnet.technic, lugnet.robotics, lugnet.build, lugnet.announce.moc)
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| | First Reaction to the Takanuva set (8596)
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There is no way that, in the movie, Takanuva does not come to a screeching halt in front of the other Toa and throw a shower of dust on them. Is there a biker term for that maneuver? (21 years ago, 24-Jun-03, to lugnet.technic.bionicle, FTX)
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| | Re: LEGO design patterns... you know, there's a book in that, I'm sure of it!
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(...) LOL actually most (all?) Harleys are belt drive. When is belt drive a better option? But I agree a compendium of such "secrets" would be a good thing. But it'd take a lot of time & effort to compile, and that's after you've taken the abstract (...) (21 years ago, 24-Jun-03, to lugnet.technic)
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| | Re: LEGO design patterns... you know, there's a book in that, I'm sure of it!
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(...) No, you're spot on. Gears and chain drives are both viable ways of transmitting power... but the real trick is to know when each one is a good choice, It's not even enough just to say "chains are good for bikes and gears are good for cars".... (...) (21 years ago, 24-Jun-03, to lugnet.technic)
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| | Re: Blacktronicle II: Bohrokitron
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(...) I was a bit less than surprised, actually. Paul Coombs already mentioned that his Gremlin MOCs weren't very well-received, and this one is quite similar in concept. (...) Isn't that like saying a team is on a two-game winning streak? I've made (...) (21 years ago, 24-Jun-03, to lugnet.technic.bionicle, lugnet.build.mecha, lugnet.space, FTX)
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