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(...) In a search at trains.com, i have found this message board: (URL) is a message board for model railroading, and may be very helpful to you. Josh (25 years ago, 23-Mar-01, to lugnet.robotics.rcx, lugnet.trains)
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| | Re: Analogue Control of Pneumatics
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Whoa. Not entirely correct. You can do accurate positioning with pneumatics, it's just harder to do than with hydraulics, because you have to take air compressiblity and seal "stiction" into account if you want to hit an arbitrary position that's (...) (25 years ago, 22-Mar-01, to lugnet.build, lugnet.general, lugnet.technic, lugnet.robotics.rcx)
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| | Re: light sensor multiplexer
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hi Nitin, I'm an energy freak to, but I can't follow your reasoning Because I'm building a multiplexer too (probably will be posted next week, so I can make still some changes) and I'm using even lower resistor values then Michael (due to a (...) (25 years ago, 22-Mar-01, to lugnet.robotics.rcx)
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| | Re: The sound of train
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I don't have any .dat or .wav files, but te create steam engine sounds, use white noise and pulse it. This is an old trick for that. Sonnich Zhengrong Zang <mikezang@iname.com> wrote in message news:3AB96E4A.45E7A5...ame.com... (...) (25 years ago, 22-Mar-01, to lugnet.robotics.rcx, lugnet.trains)
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| | Re: Analogue Control of Pneumatics
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(...) I wouldn't say that at all. Its just that you'd need a good supply of compressed air (there's plenty of compressor designs about) and a good feedback mechanism. This is by no means impossible - just a bit tricky. ROSCO trimmed lugnet.general (...) (25 years ago, 22-Mar-01, to lugnet.build, lugnet.technic, lugnet.robotics.rcx)
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| | Re: Analogue Control of Pneumatics
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(...) Ok. So you can't do it with pneumatics. Looking around for alternative ways of making a power steering mechanism, I found this link (URL) which gives an RCX based motor driven mechanism that might be of interest to others. Al Telanco (25 years ago, 22-Mar-01, to lugnet.build, lugnet.general, lugnet.technic, lugnet.robotics.rcx)
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| | Re: light sensor multiplexer
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"Nitin Patil" <gn1721@lycos.com> wrote in message news:GALoKA.Eto@lugnet.com... (...) mA (...) If you use my simple approach, you need 4.7k and around 0.1uF. You need a low enough resistance to guarantee that the voltage drops to CMOS logic level 0 (...) (25 years ago, 22-Mar-01, to lugnet.robotics.rcx)
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| | Re: light sensor multiplexer
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In lugnet.robotics.rcx, Michael Gasperi writes: Ok I agree what you say about time constant of your RC But still by using such low resistance you are wasting power. almost 1.5 mA is flowing through this 4.7K. you can keep RC constant and increase R (...) (25 years ago, 22-Mar-01, to lugnet.robotics.rcx)
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| | The sound of train
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I need the the dat of sound of train warning or alert for my RCX controlled train projects, does anyone help me? Zhengrong (25 years ago, 22-Mar-01, to lugnet.robotics.rcx, lugnet.trains)
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| | New Site
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I have created a new site as a reference for educators using RoboLab in the classroom. I would love to have some of you visit the site and provide feedback. At present we have only a few examples, but we are working on adding many more. The most (...) (25 years ago, 22-Mar-01, to lugnet.robotics.rcx.robolab, lugnet.robotics, lugnet.edu, lugnet.robotics.edu, lugnet.robotics.events.robot-arena, lugnet.robotics.rcx, lugnet.publish.html, lugnet.loc.us.in) !
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| | Re: light sensor multiplexer
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"Nitin Patil" <gn1721@lycos.com> wrote in message news:GAKC9v.F5A@lugnet.com... (...) With the 0.1uF in parallel with the 4.7K, the voltage on the clock circuit is still above the measurement voltage during the normal read interval. It doesn't (...) (25 years ago, 21-Mar-01, to lugnet.robotics.rcx)
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| | Re: light sensor multiplexer
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(...) Regarding the power used I think you are correct since it is or the order of few microamp. but even then your design can not ( rather Do not ) switch power. Also what I did not like in your desigh is 4.7K resistor. which changes reading in (...) (25 years ago, 21-Mar-01, to lugnet.robotics.rcx)
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| | Re: light sensor multiplexer
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In lugnet.robotics.rcx, Rainer Balzerowski writes: hi Rainer (...) This is not true since you need to maximum of 60ms after that time out occurs in microconterolor and it chanes the sensor. yes that is true that it is slow for your application. I (...) (25 years ago, 21-Mar-01, to lugnet.robotics.rcx)
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| | Re: light sensor multiplexer
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(...) I'll bet you can't even measure the power used in the two CMOS parts. Why don't you publish your design so we can pick on it? Michael Gasperi (25 years ago, 21-Mar-01, to lugnet.robotics.rcx)
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| | Re: light sensor multiplexer
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Hi Nitin, (...) Yes, sadly but true. That's why I have to use a battery anyway. (Or an output, but I would save it for other tasks.) (...) I understand. I should have explained what i'm doing with the sharps, sorry. I have a task running, that (...) (25 years ago, 21-Mar-01, to lugnet.robotics.rcx)
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| | Re: Bug in RCX 2.0 beta (Was: RIS 2.0 software now in beta)
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(...) Hi Sebastian I think you're right in your analysis and TLG may silently have fixed the problem, because if you look at the Vision Command installation, you'll find that some of the SDK DLLs are newer in that release. For fun, I copied the DLLs (...) (25 years ago, 21-Mar-01, to lugnet.robotics.rcx, lugnet.robotics)
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| | Re: light sensor multiplexer
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Hi Rainer, I do not understand quite your point about timing. Regarding to power sharp takes much more than what your RCX can give ( my measuremants show that RCX gives RMS current of )15 mA only this is not going to drive your sharp at all. (...) (25 years ago, 21-Mar-01, to lugnet.robotics.rcx)
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| | Re: light sensor multiplexer
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(...) Hi Nitin, okay, I see. Sorry, but then your circuit isn't interesting for me. I thought about using Sharp GP2D12 with it, but that won't work. First the Sharps have a current consumption of about 33mA up to 50mA max. Second the Sharps need (...) (25 years ago, 20-Mar-01, to lugnet.robotics.rcx)
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| | Re: Bug in RCX 2.0 beta (Was: RIS 2.0 software now in beta)
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Dear fellow Lego enthusiasts, so far I did not receive any feedback to my problem report, neither from the newsgroup, nor from Lego technical support. Could somebody please try to confirm that I am not completely stupid in my analysis! Regards, (...) (25 years ago, 20-Mar-01, to lugnet.robotics.rcx, lugnet.robotics)
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| | Re: light sensor multiplexer
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Hi Rainer What I do is that switch the power to silected sensor only I do it by using FET. since there is not enough power for all sensors. so when you switch to sensor 2 other sensors are kept off. there is enough power for one sensor since my (...) (25 years ago, 20-Mar-01, to lugnet.robotics.rcx)
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