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Do you have any NQC code? Zhengrong (...) (25 years ago, 26-Mar-01, to lugnet.robotics.rcx, lugnet.trains)
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| | Re: cannot download RCX Code
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(...) You might try disableing the FIFO (if it has one) in the serial port configuration. Depending on what other applications use the serial port, you will probably want to re-enable the FIFO when using those applications. Mike (25 years ago, 25-Mar-01, to lugnet.robotics.rcx)
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| | Re: Analogue Control of Pneumatics
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Perhaps TLG should be meeting companies that produce valves of the same quality as those mentioned. It also sounds like the timing belt used for the test bed could be replaced or reinforced even more. -- Cheers ... Geoffrey Hyde "Xanthra47" (...) (25 years ago, 25-Mar-01, to lugnet.build, lugnet.general, lugnet.technic, lugnet.robotics.rcx)
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| | Re: Analogue Control of Pneumatics
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Yep, and if you combine those high-speed, high-precision pressure regulators with low stiction cylinders and a fast PID controller you can get even better accuracy and repeatability. When I was working for an encoder company, I scavenged some parts (...) (25 years ago, 25-Mar-01, to lugnet.build, lugnet.general, lugnet.technic, lugnet.robotics.rcx)
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| | Re: Analogue Control of Pneumatics
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Hi I did some 'research' in this area about three years ago for the control of a pneumatic robot arm. It was quite simple positional control ie position the piston at any point in the cylinders stroke and hold it there. The controller was just a PC (...) (25 years ago, 24-Mar-01, to lugnet.build, lugnet.general, lugnet.technic, lugnet.robotics.rcx)
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| | Re: The sound of train
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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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