 | | Pneumatic Presure sensor
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Mindsensors Has recently developed a low cost pressure sensor, which measures pressure up to 35 Psi (241 Kg/scm) using Motorola Pressure sensor. If your are interested visit us at www.mindsensors.com/pps.htm www.mindsensors.com Mindsensors Robotics (21 years ago, 30-Jul-03, to lugnet.robotics.rcx)
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| | Re: light sensor question
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(...) A friend of mine suggests that the poor response of the sensor to the LED is because the light from the LED is a single color. Where as the light from the incandescent bulb is white light which apparently contains many if not all of the (...) (21 years ago, 29-Jul-03, to lugnet.robotics.rcx)
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| | Re: light sensor question
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"Jona" <jona@24tooth.com> wrote in message news:HIM3z8.t92@lugnet.com... (...) react and it (...) LEDs. (...) the light (...) something (...) sensor itself? I suspect that the spectral composition of the lights are quite different. As to what the (...) (21 years ago, 26-Jul-03, to lugnet.robotics.rcx)
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| | Re: light sensor question
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(...) Here is another question...does incandescent light differ from the light given off by LEDs in terms of how the light sensor sees it? I am experimenting with some LEDs trying to get the light sensor to react and it seems to only see the light (...) (21 years ago, 26-Jul-03, to lugnet.robotics.rcx)
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| | Re: light sensor question
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(...) According to Kekoa Proudfoot's RCX Internals webpage ((URL) if (raw < 187) // bug? this allows percent=101, should be raw < 189 sensor->value = 64 else sensor->value = (3ff - raw) * 19 / 9c Numbers are in hexadecimal (base 16). Jürgen (21 years ago, 24-Jul-03, to lugnet.robotics.rcx)
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| | Re: light sensor question
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(...) The Analog to Digital converter of the h8/300 (the brains of the lego mindstorms) is 10 bits, so it has a range of 0-1023. I'm not sure how it converts that to the 0-100, it may do it by just dividing by 10 and rounding. If you want to see (...) (21 years ago, 24-Jul-03, to lugnet.robotics.rcx)
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| | Re: light sensor question
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(...) What I'm looking for is really the latter of the topics. It seems to me that it must have some sort of units, because I've never seen it hit zero even with alterations (as Ralph Hempel has described on his site). It seems like it should be (...) (21 years ago, 23-Jul-03, to lugnet.robotics.rcx)
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| | Re: light sensor question
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(...) Is this what your looking for? (URL) terms of what units it mesures it in I don't think it really has any. it is just a relative reading from 0-100. (21 years ago, 23-Jul-03, to lugnet.robotics.rcx)
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| | light sensor question
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I am writing a research paper about work I have done with Mindstorms this summer. One thing that I used a lot was the light sensor, but I am having a hard time finding what exactly the sensor measures. I was wondering if anyone could give me any (...) (21 years ago, 23-Jul-03, to lugnet.robotics.rcx)
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| | Zooming in robolab, printing in RCX
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Is there any way to zoom into the icons in robolab, they are a bit tiny and I wanted to know if I could make them look bigger so its easier to see. Also does the RCX Code (or RIS program that comes with the mindstorms kit) have the capability to (...) (21 years ago, 18-Jul-03, to lugnet.edu, lugnet.faq, lugnet.general, lugnet.robotics, lugnet.robotics.edu, lugnet.robotics.rcx, lugnet.robotics.rcx.legos, lugnet.robotics.rcx.robolab)
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| | USB/Serial Converter
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Hi, folks. I've tried to connect to my RCX 1.0 (firmware 0328) from my laptop. Since I have only a serial IR tower, it works fine on my desktop PC, but communications won't work when I use a USB/serial converter to connect it to my laptop (there (...) (21 years ago, 18-Jul-03, to lugnet.robotics.rcx, lugnet.robotics.rcx.legos)
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| | Re: Programming in Assembly
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(...) (how the manual says to do data)? That's because I don't like to type more than is necessary! :-) Take this line for example: mov.b #0x02:8,r0h This line is doubly redundant. The destination operand is an 8-bit register so the other qualifiers (...) (21 years ago, 18-Jul-03, to lugnet.robotics.rcx, lugnet.robotics.rcx.legos)
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| | Re: Programming in Assembly
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Ok, the motor stuff makes sense, I got a little confused with the shift thing. I looked at the proggamming manual some more and it explaned the @ (Register inderect) but I don't see why it is needed, also in you example you specify the data as (...) (21 years ago, 18-Jul-03, to lugnet.robotics.rcx, lugnet.robotics.rcx.legos)
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| | Re: Programming in Assembly
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(...) You should look at Kekoa Proudfoots documentation of RCX internals ((URL) and his librcx library to understand the calling convention for the ROM. Then get yourself the H8300 tools (gcc et al) somewhere, this includes assembler and (...) (21 years ago, 16-Jul-03, to lugnet.robotics.rcx, lugnet.robotics.rcx.legos)
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| | Re: Programming in Assembly
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(...) mentioned previously) that describes the on chip I/O features of the H8 if you plan on doing any work with the sensors. (...) to (...) that (...) To turn on motor C forward you would do this: mov #0x02,r0h mov r0h,@0x80:8 The second (...) (21 years ago, 17-Jul-03, to lugnet.robotics.rcx, lugnet.robotics.rcx.legos)
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| | Re: Programming in Assembly
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Cool, thanks I was able to find the doc here: (URL) post about the motor seems helpful, so if I understand right the way to run motor A forward would be "mov 0x030003,r0h mov 0x80,r0h" and for the motor C the same except 0x06? How does the (...) (21 years ago, 17-Jul-03, to lugnet.robotics.rcx, lugnet.robotics.rcx.legos)
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| | Re: Programming in Assembly
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Here's a more direct link for the H8 docs: (URL) down to the literature section and download the two PDFs. For assembly, I would recommend starting off with an installation of BrickOS and perusing the various source code files for the kernel. You'll (...) (21 years ago, 16-Jul-03, to lugnet.robotics.rcx, lugnet.robotics.rcx.legos)
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| | Programming in Assembly
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I was interested in writing some assembly code for the lego mindstorm, I don't plan on writing an incredibly complex program though. I am learning asm for the z80 chip so I have a little experience. I only want a single threaded application with one (...) (21 years ago, 16-Jul-03, to lugnet.robotics.rcx, lugnet.robotics.rcx.legos)
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| | Re: Touch Switch 2974
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"Philippe Hurbain" <philohome@free.fr> wrote in message news:HH8tDw.B8I@lugnet.com... (...) metallic (...) with (...) No capacitor as far as I can tell. I looked at it on the scope and the transitions were no different than if I just used a 2.2K (...) (21 years ago, 1-Jul-03, to lugnet.robotics.rcx)
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| | RE: Port 5 Bit 2
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Mark, Good information. I was wondering what else got powered down by that bit. Once again, I think we need to take a moment to think about what life would be like without LUGNET. Just having those old archives to look through can help save a large (...) (21 years ago, 30-Jun-03, to lugnet.robotics.rcx)
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