 | | RE: Is an RCX Output Amplfier, possible ?
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I think John Barnes has designed such a beast. John, maybe you can answer here? (...) (25 years ago, 8-Feb-01, to lugnet.robotics.rcx)
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| | Re: Is an RCX Output Amplfier, possible ?
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(...) Maybe you're looking for a DC motor driver like L293D (used with handyboard) from STMicroelectronics (former SGS-thomson) (URL) for all available driver this driver is suitable for use in switching applications up to 5 kHz. I don't know the (...) (25 years ago, 8-Feb-01, to lugnet.robotics.rcx)
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| | Re: Is an RCX Output Amplfier, possible ?
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Dean, Your motor multiplexer is cool, but not really what I'm after. What I need is a way to have a single output drive several motors in the same direction at the same time (IE Hook them all up in parallel.) After reading some of the posts here and (...) (25 years ago, 8-Feb-01, to lugnet.robotics.rcx)
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| | Re: Lght Sensor & Three colors?
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(...) The light sensor doesn't actually "see" colors, it only distiguishes between dark and light. Therefore I have found that using different grey scales is a good way to make distinguishable "colors". Different grey scales can be made by printing (...) (25 years ago, 7-Feb-01, to lugnet.robotics.rcx)
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| | Re: Lght Sensor & Three colors?
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(...) My card reader 2 reliably reads cards built with yellow, grey and black plates ((URL) problem in brick sorters is that slight modifications of brick positions can cause more variation in reflected light than color. Take care too of specular (...) (25 years ago, 7-Feb-01, to lugnet.robotics.rcx)
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| | Re: Is an RCX Output Amplfier, possible ?
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(...) (URL) you 6 outputs from 3. Dean -- Coin-Op's For Sale!: (URL) Lego Workshop: (URL) Lego Club: (URL) (25 years ago, 7-Feb-01, to lugnet.robotics.rcx)
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| | Is an RCX Output Amplfier, possible ?
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I'm a not an electrical engineer and I couldn't even play one on TV : Ok. That being said, would it be possible to amplify the PWM output from the RCX to run multiple (2-4) motors off a single output connector using an external nicad battery ? Can (...) (25 years ago, 7-Feb-01, to lugnet.robotics.rcx)
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| | Re: Lght Sensor & Three colors?
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Just a thought: Couldn't one make a "rosetta stone" wheel of the various LEGO(R) colors that uses an angle sensor for indexing them and then just compare the brick being "measured" to the known bricks on the wheel ? It'd be cumbersome, but not very (...) (25 years ago, 7-Feb-01, to lugnet.robotics.rcx)
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| | Re: Mindstorms for Dummies
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Huh, I hope that "Lego Mindstorms pour Les Nuls" will be soon available in France ;-) Waiting this great happening, I will stay with my Oreilly Unofficial Guide... -- Alexandre BEC laleks@free.fr (URL) (25 years ago, 7-Feb-01, to lugnet.robotics.rcx, lugnet.books)
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| | Re: Lght Sensor & Three colors?
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Le Mardi 06 Février 2001 21:50, vous avez ?rit : (...) I think that the identification of colors can be quite accurate, assuming that we may need spend time for retrieving several sample values from the sensor, and doing thus a kind of average and (...) (25 years ago, 7-Feb-01, to lugnet.robotics.rcx)
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| | RE: Mindstorms for Dummies
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(...) I felt a bit guilty after I posted my review because it was written with a lot of....well, let's just call it emotion. Rereading my opening phrase I realize there may be opportunity to take it out of context... (...) In case there is any (...) (25 years ago, 6-Feb-01, to lugnet.robotics.rcx, lugnet.books)
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| | Re: Evolvable mindstorms
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Doh!!!!!! www.geocities.com/ciaranjessup (...) (25 years ago, 7-Feb-01, to lugnet.robotics.rcx)
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| | Re: Evolvable mindstorms
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What's the URL? Jerry (...) (25 years ago, 6-Feb-01, to lugnet.robotics.rcx)
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| | Evolvable mindstorms
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A couple of people have expressed an interest in my Dissertation on evolvable Lego mindstorms Code, now I hadn't intended to publish anything on it until it was complete, but I was trying to avoid working :) So I knocked up a quick (very very dirty) (...) (25 years ago, 7-Feb-01, to lugnet.robotics.rcx)
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| | Re: Lght Sensor & Three colors?
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I'm pretty sure there were no filters involved. This was the basic robot arm that can be built from the 9740(?) Control Lab Starter Set for the Serial Interface Box. She slightly modified it so that there were multiple bins for all of the different (...) (25 years ago, 6-Feb-01, to lugnet.robotics.rcx)
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| | Re: Lght Sensor & Three colors?
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Ben, did this designer use any filters? Or was this simply the response of the LED and detector in the Light Sensor? (25 years ago, 6-Feb-01, to lugnet.robotics.rcx)
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| | Re: Jin Sato Book about Mibo
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Ok, I'll answer my own question: (URL) I think I saw this a long time ago, but I had assumed that the "Mibo in Book!" link was referring to the Mibo on the cover of a Japanese magazine that Jin Sato had on display at Mindfest. I didn't realize it (...) (25 years ago, 6-Feb-01, to lugnet.robotics.rcx, lugnet.books)
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| | Re: Lght Sensor & Three colors?
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I saw a 6th grade girl with a lego robot arm that could sort about 10 different lego colors using the light sensor. It was amazing. It wasn't the RCX, but the light sensor was the same. She actually brought in her pink and purple LEGOs from home (...) (25 years ago, 6-Feb-01, to lugnet.robotics.rcx)
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| | Re: Gearing down a lego motor
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I think a worm gear and a 40-tooth gear worked for me. A string was fixed above, and wound around the axle connected to the 40-tooth gear. This wasn't fast though, more like a slow climb. But I think you definitely want a worm gear or some kind of (...) (25 years ago, 6-Feb-01, to lugnet.robotics.rcx, lugnet.robotics)
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| | Re: Mindstorms for Dummies
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I got Mindstorms for Dummies sent to me as soon as it was ready from Amazon, since I'm curious what my competition looks like. :) And I kept quiet for a while, but I'm glad you wrote something first, Ralph, because I feel the same way. I was (...) (25 years ago, 6-Feb-01, to lugnet.robotics.rcx, lugnet.books)
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