 | | AND gate brick?
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I saw someone's (sorry can't remember who) diagram for constructing an AND function with two touch sensors and three wires and this got me to thinking, it would be relativly easy to make an AND gate brick (it could even have a little schematic AND (...) (25 years ago, 24-Dec-99, to lugnet.robotics)
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| | Re: AND gate brick?
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Hi. I sincerely doubt that LEGO has ever released logic bricks. However, I think that it is a great idea. However, a two input NAND brick and a bridge would be much more useful. As for symbols. Are you refering to the traditional pictorial symbols (...) (25 years ago, 24-Dec-99, to lugnet.robotics)
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| | RIS 1.5; question about the RCX version
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I just received the Lego Mindstorms RIS v1.5 as an early Christmas present, but the RCX unit itself says "1.0" on it. Do all of them say this? It doesn't have the AC adapter plug anywhere, and the serial number is 371372 so I'm pretty sure it's a (...) (25 years ago, 24-Dec-99, to lugnet.robotics)
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| | Re: RIS 1.5; question about the RCX version
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Yes, you have the 1.5 version. You can tell because it doesn't have the AC adapter. Lego didn't mark the units "1.5", they left "1.0" on them for some reason. -Mike Daniel A. Segel <lego-robotics@crynwr.com> wrote in message (...) (25 years ago, 24-Dec-99, to lugnet.robotics)
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| | Re: AND gate brick?
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Hi Andy. The reason for symbols for AND or NAND or whatever is because those are what are used when you draw circuit diagrams. Essentially, the idea is pedagogical. Once you are familiar with them, the tradiitional AND, NAND, NOR, XOR, &c. symbols (...) (25 years ago, 24-Dec-99, to lugnet.robotics)
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| | Re: AND gate brick?
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(...) Additionally, if you had bricks for all these types of functions, you could build logic systems with the bricks directly from schematics or circut diagrams... Imagine being able to say something like, "signal the RCX if touch sensor 1 and 2 (...) (25 years ago, 24-Dec-99, to lugnet.robotics)
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| | Re: AND gate brick?
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Why put a drawing or IEEE boxes or whatever? You could just write on the side AND. I think it would be much simpler. Andy (...) (25 years ago, 25-Dec-99, to lugnet.robotics)
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| | RCX 1.5 vs 1.0 (for the record)
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Just pointing out that one visible difference between a 1.0 RCX and 1.5 RCX is that the the 1.0 unit has a "jack" for an AC adapter while the 1.5 does not (neither unit includes an "ac adapter" or an "ac plug", as posted here recently). The jack can (...) (25 years ago, 25-Dec-99, to lugnet.robotics)
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| | Re: AND gate brick?
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I meant on the bricks. Put the word "AND" or "NAND" or "OR". Like this: :---...---: : AND : :---...---: On diagrams, you could still use the symbols. (...) (25 years ago, 25-Dec-99, to lugnet.robotics)
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| | Re: AND gate brick?
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The use of blocks with logic, comparison and input/output functions is part of a kit from the UK called LOGIBLOCS. The small plastic blocks have an internal circuit board that has inputs around the edges and one output connection. It is very easy to (...) (25 years ago, 26-Dec-99, to lugnet.robotics)
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| | Re: AND gate brick?
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(...) (25 years ago, 26-Dec-99, to lugnet.robotics)
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| | IR tower/cable
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Is the IR tower cable straight-through or what? Tried to use the shipping version with our new Christmas 1.5 and the fit is so tight that it pushed 6 of 9 pins back through the connector on my laptop. The lesson is to use a better cable I think. (...) (25 years ago, 27-Dec-99, to lugnet.robotics)
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| | Re: IR tower/cable
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(...) I think its effectively a null-modem (switching TXD/RXD and RTS/CTS). Dave Baum (25 years ago, 27-Dec-99, to lugnet.robotics)
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| | Re: AND gate brick?
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(...) There was a Scientific American article about 'photovores' that had simple (virtual) robots governed by basic logic circuits and motors. It was published circa 1986-7, and was really cool w/r/t the behaviours that arose out of really trivial (...) (25 years ago, 27-Dec-99, to lugnet.robotics)
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| | Re: AND gate brick?
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Hi, What about LEGO AND-OR matrices, like in PALs. We could use one stub to indicate each wire crossing, and use metallic 1x1 plates to "burn" contacts. The plates would be rather large though... and the electronics complicated... :-( Just a thought (...) (25 years ago, 30-Dec-99, to lugnet.robotics)
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| | Re: AND gate brick?
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Hi Andy. Your drawing works just fine for ONE gate. Now imagine a 135 x 44 piece of paper covered with 50 or more of the things. Folks didn't come up with the special symbols in order to make things harder. Imagine trying to do arithmetic if you (...) (25 years ago, 30-Dec-99, to lugnet.robotics)
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