 | | Re: A better full adder!
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(...) Not sure what you mean. If an output isn't producing any airflow, how do you invert that? BTW, I've been wracking my brains on this for several hours now, I can't figger out how you possibly could have built a full adder with only 3 pistons (...) (21 years ago, 27-Jun-03, to lugnet.technic, lugnet.robotics)
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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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(...) Hi all, What about using the ample and growing infrastructure provided by the Brick Instruction Portal for this project? (URL) a builder who takes the time to fully document my MOCs for some of the reasons mentioned in this thread. However, (...) (21 years ago, 27-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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(...) That sounds rather overengineered to me. Why not make a Wiki like the software patterns people do? Jürgen (21 years ago, 27-Jun-03, to lugnet.technic)
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| | Re: YAPNQ II
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(...) Okay... so no exhaust from the switch's inaccessible exhaust port. That's what I needed to know. I've never exploited the center position in any design I've done so far primarily because I wasn't sure what would happen. >> Mark (21 years ago, 27-Jun-03, to lugnet.technic)
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| | Re: YAPNQ II
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(...) All three ports are blocked. (...) Kevin (21 years ago, 27-Jun-03, to lugnet.technic)
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| | Re: YAPNQ II
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Mark Tarrabain's utterance expressed in news:HH4J8v.20Aw@lugnet.com: (...) Absolutely nothing happens.. the switch is made of two pieces - one which is the grey case - the other is a piece with a hole just big enough to fit over the center hole and (...) (21 years ago, 27-Jun-03, to lugnet.technic)
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| | Re: A better full adder!
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(...) Yes. B and NOT B into the mux formed by two switches that are arranged to never release. (...) But with LEGO pneumatics you can typically get it for free. (...) Yes. When I wrote my post up yesterday I'd forgotten that I needed NOT B as an (...) (21 years ago, 27-Jun-03, to lugnet.technic, lugnet.robotics)
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| | YAPNQ II
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(Still designing, even without any pneumatics... what can I say, I'm a sucker for theory) When a pneumatic switch is in the center position, What happens if you pump air into either of the side valves? What happens if you pump air into the center (...) (21 years ago, 27-Jun-03, to lugnet.technic)
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| | Lego Links
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Lego Links now has 275 categorized creations with working picture links in 22 categories. As you view the website you will notice that some categories have more creations than others. I started collecting links to gain inspiration for certain (...) (21 years ago, 26-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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(...) Excellent example. Yes, it was really the organizational aspect that I was thinking of. This is partly a facet of the GUI... in how the user navigates to the data, how it is presented etc. But on second thought, it's also a data (...) (21 years ago, 26-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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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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