 | | Re: Rechargeable Batteries
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In article <3B69FD3A.3DA7E73A@c...ects.com>, "Frank Caggiano" <caggiano@crystal-objects.com> wrote: I'm surprised no one has mentioned rechargable lithium as used in, e.g., laptops. Rather expensive, but the hold a fair amount of charge. Would they (...) (23 years ago, 5-Aug-01, to lugnet.robotics.rcx)
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| | Re: Rechargeable Batteries
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Jerry: What is the problem with the NiMH batteries? the low voltage? Or extra $$ ? Roger (...) (23 years ago, 4-Aug-01, to lugnet.robotics.rcx)
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| | Re: Is this an error in legOS 0.2.5?
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(...) a (...) Maybe, if you wanted to be really flash, when you get the (non-ultra) low battery warning, your robot could start seeking out the tower, and get ready to send the data. Maybe have a light near the tower that starts flashing when it (...) (23 years ago, 4-Aug-01, to lugnet.robotics.rcx.legos)
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| | Re: Rechargeable Batteries
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(...) I use NiMH and get a voltage between 7.8V freshly charged and 7V at the low end (i.e. slightly higher than NiCd). The lower voltage is not really a problem for me. The motors may be somewhat less powerful, but if you're just playing and not (...) (23 years ago, 4-Aug-01, to lugnet.robotics.rcx)
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| | Re: SubVI help screens
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Yes you can create your own help screens, make your own command icon, etc. This is explained in detail in the "Elevator" chapter (Chapter 19) of my book "Creative Projects with LEGO Mindstorms". You can create your own help menu by double-clicking (...) (23 years ago, 4-Aug-01, to lugnet.robotics.rcx.robolab, lugnet.robotics.rcx)
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| | Re: Specs for Mindstorms gearmotor?
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I have pictures of the inside of the gear motor in chapter 7 of my book, "Creative Projects with LEGO Mindstorms". The motor is geared down by a factor of 13.56 --- 10 tooth to 44 tooth gear, then 12 tooth to 37 tooth gear. 12 tooth gear and 44 (...) (23 years ago, 4-Aug-01, to lugnet.robotics.rcx)
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| | Re: Rechargeable Batteries
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Hi Frank; Do you have a 1.0 RCX? If so you can do what I did. I used 3 4.5v battery rods with NiMh (9 total) and a custom wire to power my RCXs. It works great for me because I am using multiple RCXs off one power source (I have removed the RCX AA (...) (23 years ago, 4-Aug-01, to lugnet.robotics.rcx)
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| | Re: Is anyone using Java+RCX in their intro CS teaching?
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Yes, I will be using Java and the RCX in a course at Berkeley this fall. I used NQC last spring, but switched to java to use an OO language, get more space total memory and in particular more space for variables. And because a couple of my students (...) (23 years ago, 3-Aug-01, to lugnet.robotics.rcx.java)
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| | Re: Rechargeable Batteries
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(...) Nicads have a lower cell voltage (1.2 rather than 1.5), so they won't work very well in the RCX. Personally I use rechargeable alkaline cells (e.g. Ray-o-vac Renewal batteries). The downside to rechargeable alkalines are that they don't have (...) (23 years ago, 3-Aug-01, to lugnet.robotics.rcx)
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| | SubVI help screens
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I recently discovered the feature in RoboLab that lets you compact many program steps into one icon, using the command 'Create SubVI'. It's intuitive and easy to use. I suspect you can create help screens and change and label the icon it creates, (...) (23 years ago, 3-Aug-01, to lugnet.robotics.rcx.robolab)
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| | Re: about lnp_integrety_write
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(...) Hi, the function does exactly what the name says...it sends a LNP integrity layer packet of given length. Anyway the function seems to be unused. lnp_addressing_write() is e.g. used to send the acknowledges in program.c, which makes perfect (...) (23 years ago, 3-Aug-01, to lugnet.robotics.rcx.legos)
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| | Re: Rechargeable Batteries
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(...) Frank, I would *not* use Nicads or NiMH rechargeables. Their full-charge voltage is about 1.25V while alkaline batteries are about 1.55. I have Ray-O-Vac Rechargeable Alkaline batteries. They last several hours of operating time between (...) (23 years ago, 3-Aug-01, to lugnet.robotics.rcx)
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| | about lnp_integrety_write
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anyone know what this function does? i could get no reference to it under the legOS howto written by luis villa. ive tried sending messages both with it and without it and it seems to work anyways. regards kenneth johansen kennethj@stud.cs.uit.no (23 years ago, 3-Aug-01, to lugnet.robotics.rcx.legos)
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| | Re: Is anyone using Java+RCX in their intro CS teaching?
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(...) David, I cannot answer your question directly, but I have done some work which may be related to your interest. A while back, I wrote a small-scale Java application that simulated a 2-D mobile robot. The interactions between the simulator and (...) (23 years ago, 3-Aug-01, to lugnet.robotics.rcx.java)
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| | Is anyone using Java+RCX in their intro CS teaching?
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Hi all, Traffic is a little light in this group, so I thought I would see if any of its readers is doing anything with Java and the RCX in a particular area of interest that I have. There is quite a lot of intro Java teaching (including mine) that (...) (23 years ago, 3-Aug-01, to lugnet.robotics.rcx.java)
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| | Re: Dumb Q - How to get to Robolab Level5
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(...) The Programmer section has four levels of Pilot and four levels of Inventor. Only the Investigator section has five levels. (23 years ago, 3-Aug-01, to lugnet.robotics.rcx.robolab)
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| | Re: Dumb Q - How to get to Robolab Level5
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I am new to Robolab. I find a level 5 in Investigator. There is a window in the top center that allows me to select Level 1 through 5. Hope this helps. -- Bob Fay rfay@we.mediaone.net (URL) <lwhite@pelicaneng.com> wrote in message (...) (23 years ago, 3-Aug-01, to lugnet.robotics.rcx.robolab)
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| | Rechargeable Batteries
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Hello, I'm at the point now where I need to get rechargeable batteries for the RCX. The alkaline's are just now making it anymore. Are Nicads OK or should I go the extra step and get nickel metal hydrides (Ni-MH)? How are radio shack's batteries and (...) (23 years ago, 3-Aug-01, to lugnet.robotics.rcx)
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| | LEGO mentioned in September issue of Astronomy magazine
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I just got my September 2001 issue of Astronomy magazine and there is a one page article about the LEGO MINDSTORMS Robotics Invention System, Exploration Mars, and Vision Command. Unfortunately, about 40% of the page is taken up by a picture of the (...) (23 years ago, 3-Aug-01, to lugnet.general, lugnet.robotics.rcx)
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| | Dumb Q - How to get to Robolab Level5
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I used to know this, now I can't find the reference. Anyone? Hangs his head in shame, Larry (23 years ago, 2-Aug-01, to lugnet.robotics.rcx.robolab)
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