 | | 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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| | 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 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: 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: 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: 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 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: 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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| | 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: 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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| | 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: 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: 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: Ideas for new sets?
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(...) Pokemon Jürgen (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: 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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| | 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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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: 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: 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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