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Hi folks, I've just put up a page describing my latest creation, an analog clock. It's quite compact, has coaxial minute and hour hands, and uses a fiber-optic rotation sensor to stay in sync with the RCX's internal clock. Photos, NQC source and (...) (25 years ago, 4-May-99, to lugnet.robotics)
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| | Re: New creation: Lego Clock
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(...) One comment. You can get a 60:1 ratio using lego gears using a drive train like this: 8:40 driving 8:24 driving 8:16 driving 8:16. (that is 5x3x2x2 = 60) Using legOS you could build a full featured alarm clock that used the buttons on top as (...) (25 years ago, 4-May-99, to lugnet.robotics)
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| | Re: New creation: Lego Clock
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i'd love to take a look at this (and the alarm clock sounds like a fun project idea:) but when trying to resolve Ben's page, I get a problem resolving staticip.cx. Do you have an actual IP we can reach your page at, ben? Or should I just keep (...) (25 years ago, 4-May-99, to lugnet.robotics)
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| | Re: New creation: Lego Clock
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(...) This one works for me: (URL) you are the man. I'm going to try to build the FetchBot some time this week. Jonathan -- Did you check the web site first?: (URL) (25 years ago, 4-May-99, to lugnet.robotics)
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| | Re: New creation: Lego Clock
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(...) The DNS for staticip.cx is served by my little machine, and the DSL was down for a while last night. I gotta set up that secondary DNS... In the meantime, 216.100.248.143 is fine, like Jonathan said. On Tue, 4 May 1999, alex wetmore wrote: (...) (25 years ago, 4-May-99, to lugnet.robotics)
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| | Re: New creation: Lego Clock
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(...) I take it that the fiber-optic "distributor"'s LED-switching can be sensed by the RCX? Now that is an astounding multi-use of a specialized element. -gbr (25 years ago, 4-May-99, to lugnet.robotics)
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| | Re: New creation: Lego Clock
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(...) Yep, pretty cool. I can't take credit for figuring that out, does anyone recall who did? I'm sure this side-effect didn't happen by accident, there's no real reason to switch the LED when it's blocked if all you want is pretty flashing light (...) (25 years ago, 4-May-99, to lugnet.robotics)
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| | Re: New creation: Lego Clock
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(...) Ben, I still don't know really what you are talking about, this is the first that I have heard of using that FO thingee as an angle sensor/counter. How does it work in NQC? thanks, DLC (25 years ago, 4-May-99, to lugnet.robotics)
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| | RE: New creation: Lego Clock
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(...) Has anybody looked inside on of those fiber-optic light "distributors"? Maybe it's a set of LEDs in a circle, with a contact wiper mounted on the axle that turns them on one by one as the axle rotates? Tilman -- Did you check the web site (...) (25 years ago, 4-May-99, to lugnet.robotics)
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| | Re: New creation: Lego Clock
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From: Dennis Clark <dlc@verinet.com> (...) How (...) Treat the FO device as a light sensor. As you turn it you can see it switch between two values (a high value and a low value). Count those values and you have a rotation sensor. Its probably (...) (25 years ago, 4-May-99, to lugnet.robotics)
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| | RE: New creation: Lego Clock
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(...) No, there's only one LED and it moves. I haven't opened one up, but if you turn it slowly and look down the holes you can watch the LED get brighter and then dimmer as it goes past. Weird design if you just want a light chaser, but cool if you (...) (25 years ago, 4-May-99, to lugnet.robotics)
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| | Re: New creation: Lego Clock
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Is there any way to order the fiber-optic thing by itself? I can't find it anywhere in the pitsco-dacta catalog. -Luis (...) ###...### God was my co-pilot, but we crashed in the mountains and I had to eat him. -bumper sticker ###...### -- Did you (...) (25 years ago, 4-May-99, to lugnet.robotics)
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| | RE: New creation: Lego Clock
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(...) I have never seen a service pack with it. But I believe S@H has the fiber optic multi-set (8456) on sale this spring. It includes 397 additional parts. Or you can by an Mindstorms Extreme Creatures set for $49.95... Tilman -- Did you check the (...) (25 years ago, 5-May-99, to lugnet.robotics)
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| | Re: New creation: Lego Clock
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On your page I also saw your scanner / plotter. Very cool, I've been thinking about building one of those for a while. How did you get the precision control by using touch sensors instead of rotation sensors? (...) -- Did you check the web site (...) (25 years ago, 5-May-99, to lugnet.robotics)
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| | Re: New creation: Lego Clock
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(...) The touch sensors are just limit switches at the endpoints of motion. There's not much precision, it just uses time delays and assumes that the motors spin at a fairly constant rate. Seems to work well enough for some things, but that wouldn't (...) (25 years ago, 5-May-99, to lugnet.robotics)
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