 | | 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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