 | | Re: explain polarity to middle school children
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(...) Hmmmm, that is a challange, because any cursory example leaves out the physics. I was just thinking perhaps if you likend polarity to a visual of a two lane highway. Trafic going in opposite directions. Flow and return. On the surface, (...) (20 years ago, 9-Nov-05, to lugnet.robotics.rcx.robolab)
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| | explain polarity to middle school children
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I tried to create a couple of images to explain give children, age 10 to 12, a good understanding of what polarity is. They all know changing the direction of the motor. However, I am trying to provide more details without going over their head. (...) (20 years ago, 9-Nov-05, to lugnet.robotics.rcx.robolab)
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| | Re: programming tips
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(...) With the standard firmware, not that I know of. You *can* block all incoming signals by continuously broadcasting. Having a task repeatedly transmit a simple message endlessly means that the RCX can't recieve normal messages, possibly (...) (20 years ago, 2-Nov-05, to lugnet.robotics.rcx.robolab, lugnet.robotics.rcx)
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| | programming tips
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Hi, I am contemplating if it is smart way to intercept un-welcoming signal to the RCX, such as the remote shutdown, etc. ---...--- -------- Best Regards, Elizabeth Mabrey (20 years ago, 2-Nov-05, to lugnet.robotics.rcx.robolab, lugnet.robotics.rcx)
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| | Re: roboarm activities
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(...) I found that either rotating a colour wheel in front of the sensor(with its distance LED off) in combination with a white light -or- using a coloured LED at a _very_ close distance works well; i.e. most materials give a marked response as long (...) (21 years ago, 3-Oct-05, to lugnet.robotics.rcx.legos, lugnet.robotics.rcx.robolab)
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| | roboarm activities
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Hi, questions to all the guru out there. I have spent 20 hours on this roboarm. I am hoping to make it work like a color sorter. - pick up a ball wrapped in tin foil and drop it off at a container wrapped up in tin foil as well. - pick up a ball (...) (21 years ago, 2-Oct-05, to lugnet.robotics.rcx.legos, lugnet.robotics.rcx.robolab)
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| | Re: different output power at different ports?
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(...) I've discovered a thread in legofan (URL) that talks about new features of a possible RCX 3.0. Is there more information that can be handed out? - Dave (21 years ago, 22-Aug-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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| | Re: container in a container error
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(...) Thanks Claude. I look forward to implementing the correction. Tom (21 years ago, 17-Aug-05, to lugnet.robotics.rcx.robolab)
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| | Re: container in a container error
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(...) This just was an forgotten bug that with older Robolab versions didn't harm. The solution is to remove the "Value of red container" and replace it by a blue container constant list ("User3") while selecting "RED". -Claude (21 years ago, 15-Aug-05, to lugnet.robotics.rcx.robolab)
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| | container in a container error
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I have been working with the RoboLab programs created by the Convict School to help me with a project of mine and to teach myself RoboLab. Recently I found the new work done by the school in 2002 (URL) download the files and placed them into the (...) (21 years ago, 13-Aug-05, to lugnet.robotics.rcx.robolab)
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| | RE: good way to detect the proximity of the RCX?
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Yes, that requires the RCX to receive. What I am looking for is a function which is much like the "is RCX in view" in the direct mode. This function allows the IR tower to detect any RCX in range, even the RCX is in in idle state, but just on, .... (...) (21 years ago, 10-Aug-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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| | Re: good way to detect the proximity of the RCX?
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(...) Not sure what you mean here. You could certainly program some RCX's to "ping" each other to determine if they are in mutual IR range. RCX-A sends out a message & listens for a reply, while any other RCX that "sees" such a message immediately (...) (21 years ago, 10-Aug-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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| | good way to detect the proximity of the RCX?
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Hi I understand that Robolab has a feature to detect if the RCX is in view thru the direct mode. However, this only means it has to face toward the IR tower which connected to the PC. Then, how about the way a RCX's capability to detect the whether (...) (21 years ago, 9-Aug-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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| | Re: arrays or for loops
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(...) It's a pleasure! (...) Have a look at an application of the For loop in my pump testing setup here: (URL) look at the waveform graphs that are produced: (URL) try to do that in NQC! CS (21 years ago, 28-Jul-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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| | RE: arrays or for loops
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This is cool! Thanks a bunch. In terms of feasibility and more sophisticated coding, I would perhaps think coding in NQC will be more desirable as far as teaching high school or college kid. My assumption, of course. ---...--- -------- Elizabeth (...) (21 years ago, 28-Jul-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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| | Re: arrays or for loops
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(...) At the main ROBOLAB startup menu, go to Investigator. Create a new project, say Young Brother. Choose Program level 5. Open the diagram window. Right click your mouse to bring up the function palette. Click on the G-code option to bring up the (...) (21 years ago, 28-Jul-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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| | RE: arrays or for loops
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Sorry, I forgot to supply the link... It is at (URL) Mabrey (...) (21 years ago, 28-Jul-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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| | arrays or for loops
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Hi I know how to put in a simple loop to, e.g., zero out an array of containers in inventor level 4. But, I found this on the net, it is nice and neat for loop - loops through 10 times to zero out 10 containers. All that was included inside a (...) (21 years ago, 28-Jul-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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| | Re: different output power at different ports?
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(...) Sounds like more friction in the drive mechanism to one wheel than the other. I've had the same problem with tank-driven robots. I was using the fast 9V motors geared down, but they were under-powered for the application. The friction in the (...) (21 years ago, 15-Jul-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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| | Re: different output power at different ports?
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You're absolutely sure it's not a sticky wheel? Thomas (...) (21 years ago, 15-Jul-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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