 | | LEGO Computers & Logic Gates —Martin Howard
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| | | Hi everyone, OK I've not actually built a LEGO computer, but I have recently been considering the idea. The first step has been to develop logic gates. Rather than go down the pneumatic route, which has been pretty successful, I've tried to do it (...) (20 years ago, 13-Mar-04, to lugnet.announce.moc, lugnet.robotics, lugnet.technic) !
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| | | | | Re: LEGO Computers & Logic Gates —Steve Baker
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| | | | | (...) The problem seems to me that the power to run the machine comes only from the logic inputs. Thus, you'll have to push insanely hard on a one bit input in order for it to operate any reasonable amount of logic. Maybe you need motorized (...) (20 years ago, 14-Mar-04, to lugnet.robotics)
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| | | | | | | Re: LEGO Computers & Logic Gates —Martin Howard
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| | | | | | | (...) That definately is a problem, after a couple of gates it grinds to a halt - a mixture of the slippage between gears and the problem you have identified. I had envisaged that I could use a piston arrangement to drive the clock signal backwards (...) (20 years ago, 14-Mar-04, to lugnet.technic)
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| | | | | | | | | Re: LEGO Computers & Logic Gates —James Ryan
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| | | | | | | | I'm not much on Boolean calculations -- if it stops part way through, does that make it a MAYBE gate? Jim "Martin Howard" <goldfishwbp@yahoo.com> wrote in message news:HuL5rn.4vq@lugnet.com... (...) halt - a (...) signal (...) logic (...) shift (...) (20 years ago, 15-Mar-04, to lugnet.technic)
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| | | | | | | Legway with Standr5ad Lego Light Sensors —B. Shahian
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| | | | | | Hi: I am sorry if this is a repeat question. Did anyone successfully stabilize the Legway using standard Lego light sensors ? Any links or proofs, code, etc ? Thanks Barry (20 years ago, 16-Mar-04, to lugnet.robotics)
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| | | | | | | | Re: Legway with Standr5ad Lego Light Sensors —Steve Baker
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| | | | | | | (...) I recall someone put a pair of light sensors out on the end of very long arms out in front and back of the robot. This meant that they moved a much larger distance than if they were mounted close to the wheels so that their relative lack of (...) (20 years ago, 16-Mar-04, to lugnet.robotics)
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| | | | | | | | Re: Legway with Standr5ad Lego Light Sensors —Philippe Hurbain
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| | | | | | (...) Hi Barry, Have a look to YAL... (URL) (20 years ago, 17-Mar-04, to lugnet.robotics)
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| | | | | | | | LejWay (Re: Legway with Standard Lego Light Sensors) —Juergen Stuber
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| | | | | | Salut Philippe, hi everybody, (...) a Lejos version. The hardware is the same with two sensors, and the program is loosely based on yours. Tweaking was not easy, but with a little luck the program below now manages to stand on a sheet of white paper (...) (20 years ago, 17-Mar-04, to lugnet.robotics, lugnet.robotics.rcx.java)
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| | | | | | | | Re: LejWay (Re: Legway with Standard Lego Light Sensors) —Philippe Hurbain
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| | | | | | Bonjour Jürgen, (...) I just tried LejWay, it works fine! (it was also the opportunity to install Lejos under BricxCC. Works great too...). The behaviour is somewhat different from BrickOS version, less shaky but it falls if tilt angle is too high. (...) (20 years ago, 17-Mar-04, to lugnet.robotics)
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| | | | | | | | Re: LejWay (Re: Legway with Standard Lego Light Sensors) —Juergen Stuber
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| | | | | | Hi Philippe, (...) nice to hear, for me it didn't work any more when it was darker. I would like to have some automatic calibration of the parameters to be more robust w.r.t. conditions, but I guess that is difficult. (...) Yes, probably one could (...) (20 years ago, 18-Mar-04, to lugnet.robotics)
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| | | | | Re: LEGO Computers & Logic Gates —Ross Crawford
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| | | | | (...) just a lever, like a 3L liftarm. May reduce backlash a little. It would be interesting to investigate a way to make them with a +V input of some kind - maybe a motor somehow - that does the switching of the output, similar to the compressor (...) (20 years ago, 14-Mar-04, to lugnet.technic)
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| | | | | | | Re: LEGO Computers & Logic Gates —Martin Howard
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| | | | | | (...) Thanks for the comments. The 3L liftarm is a good idea. I did originally try something similar, but went with the rack and pinion system instead in the end. At the moment I'm trying to simplify the gates to the extent that I don't need any (...) (20 years ago, 16-Mar-04, to lugnet.technic)
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| | | | | | | | Re: LEGO Computers & Logic Gates —Ross Crawford
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| | | | | | | (...) Oh that was just my way of saying "amplifier" LOL. Getting an external power source (+V is electronics talk) to power the output rather than just the input. ROSCO (20 years ago, 16-Mar-04, to lugnet.technic)
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| | | | | | | | Re: LEGO Computers & Logic Gates —Kevin L. Clague
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| | | | | | (...) This is the same thing as the amplification issue mentioned in other posts. In our pneumatic gates, we can sometimes use pressure directly from the pumps as inputs to pneumatic switches, thus providing the "amplification" people are talking (...) (20 years ago, 16-Mar-04, to lugnet.technic)
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| | | | | | | | Re: LEGO Computers & Logic Gates —Martin Howard
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| | | | | | (...) Thanks for the comments, hints and suggestions. Designing something without the pieces - that's impressive! I think the idea of a motor to amplify the signal could be used and it should be possible to put in some sort of lever that switches (...) (20 years ago, 21-Mar-04, to lugnet.technic)
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| | | | | Re: LEGO Computers & Logic Gates —Robert Fay
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| | | | | "Martin Howard" <goldfishwbp@yahoo.com> wrote in message news:HuJDsu.20sL@lugnet.com... (...) That is some very interesting work. It reminds me of the discrete component machines I have worked on. As Steve mentions, you will need a lot of (...) (20 years ago, 14-Mar-04, to lugnet.technic)
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| | | | | | | Re: LEGO Computers & Logic Gates —Martin Howard
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| | | | | | (...) Discrete component machine - now they sound interesting. Is there a good overview of such things on the web anywhere? Amplification seems to be the common comment. I'll have to try and find my thinking cap again ;-) Cheers, Martin. (20 years ago, 16-Mar-04, to lugnet.technic)
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| | | | | Re: LEGO Computers & Logic Gates —Stephane Simard
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| | | | (...) Fascinating. Stephane S. (20 years ago, 15-Mar-04, to lugnet.technic)
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