 | | Re: lego light sensor's capability of distinguishing colors
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On Tue, June 28, 2005 6:50 am, Brian Davis said: (...) That sounds like a really smart idea. At least, that's what I thought when Philo did it: (URL) he just said... (URL) (19 years ago, 28-Jun-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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| | Re: lego light sensor's capability of distinguishing colors
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(...) How about one sensor with a color wheel the RCX can drive (this is how just about all NASA spacecraft take those beautiful pictures)? Another option that might work (read: I've not tested this at all) is using more than one color of light to (...) (19 years ago, 28-Jun-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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| | Re: lego light sensor's capability of distinguishing colors
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(...) The problem is that LEGO light sensor is basically color blind, all you get is different reflectivity levels. Take care of dark shiny surfaces that can reflect as much as lighter ones (try to place the sensor at an angle to avoid direct (...) (19 years ago, 28-Jun-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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| | Re: lego light sensor's capability of distinguishing colors
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(...) Alone - it is not very good. I have seen a custom sensor with three light sensitive elements and filters. you might be able to build a crude one with one light sensor, one motor(slowed down with worm gear or the micromotor), a wedge belt (...) (19 years ago, 28-Jun-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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| | Re: lego light sensor's capability of distinguishing colors
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(...) My guess is you would have to use colour filters to get reasonable results. I did toy with that idea for doing a colour photocopier once, but haven't got around to actually testing it yet. The downside is a 3-colour scanner would either use 3 (...) (19 years ago, 27-Jun-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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| | Re: lego light sensor's capability of distinguishing colors
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On Mon, June 27, 2005 2:07 pm, Elizabeth Mabrey said: (...) I built an M&M sorter that used a LEGO light sensor... (URL) worked out pretty well, because I could just dispose of any evidence of mis-sorting. As far as real results, I think it sorted (...) (19 years ago, 27-Jun-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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| | lego light sensor's capability of distinguishing colors
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Hi Just wonder if there is anyone who has attempted to have lego light sensor to distinguish more colors than just black & white. Blue is too close to black... white is too close to white... ---...--- -------- Elizabeth Mabrey (19 years ago, 27-Jun-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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| | Re: vex robotics kit
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(...) I think you're paying not for the compiler, but for the "programmer" (a sort of serial adapter with an integrated PIC that massages the data somehow). But either way, yes, it's an extra $100 to program the thing. And without the ability to (...) (19 years ago, 23-Jun-05, to lugnet.robotics.rcx, lugnet.robotics.edu, FTX)
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| | Re: vex robotics kit
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(...) I don't think so. (...) Sure, but it seems of not much value regarding programming. The informations on the vex site are sparse and not easy to decipher, but I think you will have to: - pay aditional $99 for somethink called easyC, that is (...) (19 years ago, 23-Jun-05, to lugnet.robotics.rcx, lugnet.robotics.edu)
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| | RE: vex robotics kit
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Hi Joe, Their website seemingly offers a lot of other gadgets. However, I have serious doubt about the programming platform though. Or, perhaps I have not found much about the programming language which can interface with it. ---...--- -------- (...) (19 years ago, 21-Jun-05, to lugnet.robotics.rcx, lugnet.robotics.edu)
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| | Re: vex robotics kit
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(...) I haven't used it, but I thank you for pointing it out. (For others, the link is (URL).) I hate to say it, but this looks like it rather blows the socks off of standard LEGO robotics. The starter kit is $300, which is a 50% pricier, but comes (...) (19 years ago, 21-Jun-05, to lugnet.robotics.rcx, lugnet.robotics.edu, FTX)
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| | Re: dll 'error deleting program' with briskOS-0.9.0
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(...) [snip] (...) [snip] (...) Igor, I just got mine up and running this weekend under Debian (thanks to apt-get / Synaptic). Since you have already successfully loaded firmdl3 this may not be relevant but I had to setup a legotower0 device. sudo (...) (19 years ago, 21-Jun-05, to lugnet.robotics.rcx.legos)
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| | vex robotics kit
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Hi I wonder if anyone has had a chance to use the new VEX robotic kit by radio shack. I am trying to collect the info to evaluate this product vs LEGO RIS + robolab in terms of educational values. ---...--- -------- Best Regards, Elizabeth Mabrey (...) (19 years ago, 20-Jun-05, to lugnet.robotics.rcx, lugnet.robotics.edu)
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| | Re: position calculating for robots
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(...) You don't need advanced math for navigating, but sin and cos for calculating coordinates in an X/Y coordinate system. This you need independently from your steering system. Brickos has no math lib, but there where some posts on this list some (...) (19 years ago, 20-Jun-05, to lugnet.robotics.rcx.legos)
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| | dll 'error deleting program' with briskOS-0.9.0
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Hello, according to informations that brickOS is the most powerfull of all Mindstroms OS's, I have tried to start it. I work with a Linux 2.6 (Fedora Core 3). I have compiled it with rcx-egcs cross compiler C and C++ cross compilers (version 1.1.2) (...) (19 years ago, 19-Jun-05, to lugnet.robotics.rcx.legos)
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| | Re: brickOS-0.9 and 'error deleting program' message
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(...) IR tower inference probably is not the case since I have previously downloaded the whole brickOS system with the firmdl3 program. Only the dll does not work. Just the same, the original Lego Mindstorms sotware works and gets downloaded in the (...) (19 years ago, 17-Jun-05, to lugnet.robotics.rcx)
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| | Re: roboball
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(...) Here's what the kids can do to get started. Build a simple robot with a forward pointing light sensor. Place the activated roboball right in front of the robot and take light readings as the robot moves backwards. This can be done manually or (...) (19 years ago, 15-Jun-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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| | Re: brickOS-0.9 and 'error deleting program' message
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On Wed, June 15, 2005 12:25 pm, igor podolak said: (...) This sort of thing can happen when there is other IR interference (I'm sure there are other things that can also cause it) Try covering the tower & brick, to shield them from lights in the (...) (19 years ago, 15-Jun-05, to lugnet.robotics.rcx)
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| | brickOS-0.9 and 'error deleting program' message
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I am new to Mindstorms, but not new to computer science. Anyway I am unable to load any program to the RCX robot using the dll. I have built the brickOS system using a egcs (v. 1.1.2) hitachi cross compiler on a Linux platform running the 2.6 (...) (19 years ago, 15-Jun-05, to lugnet.robotics.rcx)
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| | RE: roboball
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Hi Mr Soh, Thank you very much for your input. Would you share your experience and views regarding tackling roboball with the LEGO RCX and light sensors, without other soldering electronic components. I have a bunch bright young 11-14 kids, I want (...) (19 years ago, 15-Jun-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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