 | | Re: Racing Line Follower
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I think I would take your stop watch back to the jeweler. -- Bob Fay rfay@we.mediaone.net (URL) Fasting" <lego-robotics@crynwr.com> wrote in message news:3.0.6.32.200104...line.no... (...) (24 years ago, 2-Apr-01, to lugnet.robotics)
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| | List software?
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What software runs this mailing list? I ask because I'd like to find out what it would take to get it to put the ML address into messages as the Reply-To address. I run a couple of lists myself (using 7-line SED scripts) and it seems like this (...) (24 years ago, 2-Apr-01, to lugnet.robotics)
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| | Re: Shutting off illumination LED on Light Sensor for LIDAR
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(...) Yes, this is the result I discovered this weekend. My conclusion is that setting the sensor to raw mode does not fully remove the light produced by the LED, and detrimentally impacts the sensor performance. I think my next approach is to try (...) (24 years ago, 2-Apr-01, to lugnet.robotics)
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| | Racing Line Follower
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Hello I've built a line follower which is quite fast (approx 4 secs per lap on the testpad). It consists of two motors, each powering a 2/3 geared large wheel. Two light sensors are attached to the front pivot wheel. The distance between the sensors (...) (24 years ago, 2-Apr-01, to lugnet.robotics)
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| | Re: David Schilling
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Oh I see. thanx....good luck! (...) (24 years ago, 2-Apr-01, to lugnet.robotics, lugnet.org.us.smart)
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| | Re: David Schilling
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(...) I built the Killough platform for the March SMART meeting mini-challenge. (SMART is the Seattle Mindstorms and Robotic Techies group.) The basic idea was to build a robot to wander around a table, without falling off, and stop beside a heavy (...) (24 years ago, 2-Apr-01, to lugnet.robotics, lugnet.org.us.smart)
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| | Re: David Schilling
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I built a Killough platform based on Leo Dorst's site and Doug Carlson's site. I have a quicktime movie and links to Leo's and Doug's sites available at: (URL) this helps! (...) (24 years ago, 2-Apr-01, to lugnet.robotics)
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| | Re: David Schilling
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Looks like a form of the Killough platform on Leo Dorst's site. The rods appear to provide a 'shell' to keep the blue base from getting stuck in the v area. There are movies of the motion on Doug Carlson's site. I do not have any links handy, but (...) (24 years ago, 1-Apr-01, to lugnet.robotics)
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| | RE: Curved Feet
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Scott, I see this set frequently on eBay. There are six there now. Just search for "8880". I got two that way. It's a great set, though I feel that the suspension and joints to transmit driving power to the wheels are rather inflexible. Most of the (...) (24 years ago, 2-Apr-01, to lugnet.robotics)
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| | Re: Solar Cell Output (Shell logo)
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Here's another link. (URL) Regards Micah J. Mabelitini - LUGNET #918 The University of Kentucky SECC Middlesboro Academic Skills Resource Center accutron@kih.net - (URL) (24 years ago, 2-Apr-01, to lugnet.robotics)
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| | Re: Solar Cell Output (Shell logo)
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(...) I believe the cell is made by Shell's photovoltaics division. (URL) Regards Micah J. Mabelitini - LUGNET #918 The University of Kentucky SECC Middlesboro Academic Skills Resource Center accutron@kih.net - (URL) (24 years ago, 2-Apr-01, to lugnet.robotics)
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| | Re: Solar Cell Output (Shell logo)
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This is may be a bit Off Topic With all the talk about the lego solar cell, (and cap) I went and got one of each. They are a nice curiosity, but as of right now, I can't seem to find any robot applications. Maybe when the sun comes back to Toronto, (...) (24 years ago, 1-Apr-01, to lugnet.robotics)
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| | David Schilling
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This has an unusual drive-train, I'd like to see what i does and how it moves. (URL) (24 years ago, 1-Apr-01, to lugnet.robotics)
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| | Re: Ideas for new sets?
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(...) Pokemon Jürgen (24 years ago, 1-Apr-01, to lugnet.robotics)
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| | Re: Shutting off illumination LED on Light Sensor for LIDAR
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(...) Actually you don't need LegOS, any input set to raw mode with the LEGO firmware will do fine. This is because even in passive mode there is a pull up of 10k to 5V, and in fact the LED is glowing dimly in this mode. Just tried it, I can get raw (...) (24 years ago, 1-Apr-01, to lugnet.robotics)
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| | Re: Question about RIS 1.0
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(...) The RIS 1.0 can be run from either 12VAC or 12VDC. In either case an internal bridge rectifier supplies the internal circuitry with the proper polarity. Internal power is supplied through an LM2936M 5V regulator (maximum input of 45V BTW) The (...) (24 years ago, 1-Apr-01, to lugnet.robotics)
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| | Re: Question about RIS 1.0
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(...) Transformers do NOT convert AC to DC. They only convert AC to AC. The DC conversion is performed by four diodes in the RIS1.0. Maximum input is rated at 12V AC or DC (the diodes will take care of the polarity for DC inputs) although the (...) (24 years ago, 1-Apr-01, to lugnet.robotics)
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| | Re: Solar Capacitor
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(...) Yeah it's for real. There's been alot of discussion about the capacitor on here recently, just do a news search. (24 years ago, 1-Apr-01, to lugnet.robotics)
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| | Solar Capacitor
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I have been playing with a couple of Lego solar panels and the Capacitors. (URL) label on the capacitor claims a value of 1 farad. Is this value possible in such a small component? I always thought a 1 farad capacitor would need a huge plate area. I (...) (24 years ago, 31-Mar-01, to lugnet.robotics)
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| | Re: Ideas for new sets?
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(...) ...and they are marketing to children raised on Nintendo. We are responsible to teach children how valuable a "highly flexible mechnical building toy" is. ---...--- $50,000 for Jill Behrman (URL) (24 years ago, 31-Mar-01, to lugnet.robotics)
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| | Re: Lego Remote Control - Here's The Scoop
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what about newmatic switches? all lot of sets have them to (...) (24 years ago, 31-Mar-01, to lugnet.technic, lugnet.robotics)
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| | Re: Shutting off illumination LED on Light Sensor for LIDAR
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(...) I strongly suspect this is a myth. A transistor is a transistor is a transistor. They all require biasing in order to function properly and that requires power. Mind you, even so-called passive devices must either generate a voltage or have a (...) (24 years ago, 31-Mar-01, to lugnet.robotics)
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| | Re: lego cap, polarity, etc
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(...) This is generally true, but not as dire as you make it sound. (...) Actually, electrolyte is a good conductor of electricity (in any direction). It comprises one of the terminals in an electrolytic capacitor. The other terminal is aluminum, (...) (24 years ago, 31-Mar-01, to lugnet.robotics)
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| | Re: Ideas for new sets?
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(...) What exists in the real world and what exists in the minds of some marketing personnel is often radically different. The play and educational value of Technic IS still present, but isn't valued as much by the marketing people at Lego. I (...) (24 years ago, 31-Mar-01, to lugnet.robotics)
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| | Re: Question about RIS 1.0
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(...) The RCX accepts AC voltage, all it needs to convert to DC is 4 diodes, or a small bridge rectifier. It takes anything from 9-12VAC. Apparently you can do some damage by plugging in DC, as in the long term you will only be passing voltage (...) (24 years ago, 31-Mar-01, to lugnet.robotics)
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| | Re: Question about RIS 1.0
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(...) Is that right? Wouldn't the AC adapter be a AC to DC Converter? I have seen the RCX circuit board and I do not remember there being enough room for a transformer built-in to convert the AC signal to DC. Steven B. Combs, MS, CIT Associate (...) (24 years ago, 31-Mar-01, to lugnet.robotics)
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| | Re: Question about RIS 1.0
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(...) The RCX uses AC input, not DC. The AC/DC conversion is internal, so what you need is a power adapter that outputs AC. I've heard that you can toast your RCX with an AC/DC adapter as well, so be careful. (24 years ago, 31-Mar-01, to lugnet.robotics)
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| | (canceled)
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| | Question about RIS 1.0
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Dear Gang, I recently got the Robotics Invention System 1.0 and I would like to know which would be the positive for the AC adapter, the inside or outside. I have an adapter, but I am not sure how to set the Positive/Negative switch. Thanks, Bryan (...) (24 years ago, 31-Mar-01, to lugnet.robotics)
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| | Re: 2001 Model
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(...) This is very true! I had all sorts of fun "improving" the four legged walking mechanism on the Darkside Developer thing. The way the instructions defined it, it was much too wobbly! With a little care redoing the key leg joints, it work a lot (...) (24 years ago, 30-Mar-01, to lugnet.robotics)
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| | LEGO capacitor cares about polarity
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I found some information about the LEGO capacitor that might help close this discussion at (URL) Characteristics - 1 Farad @ 2.5 Volts Capacity or about 3.125 joules - Operating voltage 2.5 Volts normal, 4 Volts Charging Max. - 250 mA Maximum (...) (24 years ago, 30-Mar-01, to lugnet.robotics)
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| | RE: Ideas for new sets?
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(...) While it's true that Dacta products aren't exactly readily available to the average consumer at the local mall, you can easily mail-order them. The catalog is on-line at (URL) are a few mail-order places in the US that carry the Dacta. I have (...) (24 years ago, 30-Mar-01, to lugnet.robotics)
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| | Re: Ideas for new sets?
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(...) Don't forget the selling of Lego Technic to George Lucas! I agree the Dacta Catalog is repleat with wonderful kits that are unavailable to the consumer. The solar kit is one of the most fascinating and would be a wonderful way for children and (...) (24 years ago, 30-Mar-01, to lugnet.robotics)
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| | Re: Shutting off illumination LED on Light Sensor for LIDAR
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(...) Thanks. I had seen this technique (and noticed this effect myself) but had heard rumor that this impaired the sensitivity of the detector. I'm going to try some rigorous tests and see if I can verify this. (...) We almost needa Yahoo-style (...) (24 years ago, 30-Mar-01, to lugnet.robotics)
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| | Re: Ideas for new sets?
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(...) Basically what you're asking is, "Why has LEGO completely lost their mind?". I think the "Technic concept" is still valid. I think it's just being re-marketed under the Mindstorms product line. Who knows what LEGO was thinking when they came (...) (24 years ago, 29-Mar-01, to lugnet.robotics)
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| | Re: Shutting off illumination LED on Light Sensor for LIDAR
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(...) That's not a legOS feature. You just set the input port to passive mode, and read it in RAW mode. There is an example in NQC at (URL) (I forgot to add the address in my previous post :-). (...) You can find light sensor schematics on Michael (...) (24 years ago, 29-Mar-01, to lugnet.robotics)
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| | Ideas for new sets?
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I have a very basic question, on the subject of new sets and themes and so on; If technic "was" a viable medium for kids with latent engineering skills to learn with, why are those kinds of sets not still available? If Lego were selling to the same (...) (24 years ago, 29-Mar-01, to lugnet.robotics)
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| | Re: Shutting off illumination LED on Light Sensor for LIDAR
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(...) Thanks for all the tips, everybody. I set out last night to open up my light sensor and add a jumper to allow me to take the LED out of the circuit. I was unsuccessful in getting the casing open, even after cutting the underside latching tabs (...) (24 years ago, 29-Mar-01, to lugnet.robotics)
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| | Re: lego cap, polarity, etc
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(...) <snip> The polarity markings Andy Gombos was referring to are printed on the LEGO-compatible package itself. The LEGO "capacitor" is in fact an electrolytic cap with plenty of support circuitry, and I assure you there is no danger of blowing (...) (24 years ago, 29-Mar-01, to lugnet.robotics)
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| | Re: Shutting off illumination LED on Light Sensor for LIDAR
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I drilled a hole in a 1x2 brick to give the light sensor a better sense of direction and to block the LED. The goal was to have the light sensor seek an IR beacon. (...) (24 years ago, 29-Mar-01, to lugnet.robotics)
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