 | | 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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