 | | Re: Control lego motors and rotation sensors
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(...) That's not really any different from what the RCX's firmware does though. You are doing pulse-width modulation and so does the firmware. The only difference is that you are using a longer time-constant. ---...--- Steve Baker ---...--- Mail : (...) (23 years ago, 26-Apr-02, to lugnet.robotics)
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| | Re: Control lego motors and rotation sensors
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Changing the motor 'speed' (pulse wave modulation) really only changes the torque. It will only change the speed if the motor is heavily loaded. Another technique that is more successful is to create a control loop in which the motor is on for 5 (...) (23 years ago, 26-Apr-02, to lugnet.robotics)
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| | Re: Control lego motors and rotation sensors
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(...) It's possible - but if you crank up the resolution you soon run into the problem that your software cannot run fast enough to keep count of the pulses. Also, it's hard to distinguish clockwise from anticlockwise rotation with a (...) (23 years ago, 26-Apr-02, to lugnet.robotics)
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| | Re: WELCOME to lego-robotics@crynwr.com
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For the robotics class I teach (& FLL team), I have RIS 2.0 (& 1.5) on multiple computers running Win98 and/or Win2000. No problems with either OS. Called Lego for support with a sound problem (had to get a new sound card compatible (...) (23 years ago, 26-Apr-02, to lugnet.robotics)
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| | Re: Control lego motors and rotation sensors
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(...) There are commands for the RCX to use different 'power levels' - which will translate into a change in speed if there is sufficient load. (...) lego (...) No - but you can use a gear train to make the rotation sensor spin more than once for (...) (23 years ago, 26-Apr-02, to lugnet.robotics)
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| | Sharp GP2D12 Distance Measuring Sensor
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Has anyone made this sensor compatible with the RCX? For only $8 bucks it seems ideal. (URL) (23 years ago, 25-Apr-02, to lugnet.robotics)
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| | Re: Help request : LegOS 2.5, demo/c++.cpp make failure
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(...) Thanks for that info - I was thinking *I* must have done something stupid ! (...) Good point ! I hadn't yet considered the overhead aspect. Thanks for the help ! jl (23 years ago, 24-Apr-02, to lugnet.robotics.rcx.legos)
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| | Re: Control lego motors and rotation sensors
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(...) You can set a power level, but it doesn't seem very effective at controlling speed. (...) Usually you just gear it up so that it spins faster. If you're gearing down a motor to drive a wheel or an arm, arrange to put the rotation sensor (...) (23 years ago, 25-Apr-02, to lugnet.robotics)
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| | Re: Who makes the lego webcam?
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(...) It a Logitech QuickCam Web: (URL) have to install the driver for this instead of the one that comes with the Lego cam if you want to run it under Windoze 2K or XP. It worked fine for me that way. I don't see a driver for that on the Logitech (...) (23 years ago, 25-Apr-02, to lugnet.robotics)
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| | Control lego motors and rotation sensors
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1) Can you have diferent tension levels aplied to a lego motor, for speed control purposes ? Or, one can only make it turn at a constant speed. 2) Are there more precise rotation sensors than the ones that came with lego mindstorms (only 16 ticks (...) (23 years ago, 25-Apr-02, to lugnet.robotics)
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| | Re: Who makes the lego webcam?
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I believe it's got Logitech guts. (...) (23 years ago, 25-Apr-02, to lugnet.robotics)
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| | How to orientate a robot?
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Hello! I just wanted to to tell about a project that we are working at. We are two students and our instructor at the university in Gavle, Sweden. You can find more information about the project at: (URL) expected result for this work is to show how (...) (23 years ago, 25-Apr-02, to lugnet.robotics.rcx.legos)
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| | Re: constructing a new network protocol for LegOS
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I'm a teaching assistant for a course at brown university that uses legOS and the RCX extensively. I've added quite a bit to legOS (0.2.5) to suit our course needs, but the rest is all still there. I've written up some documentation and an API for (...) (23 years ago, 25-Apr-02, to lugnet.robotics.rcx.legos)
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| | Re: install on Windows ME?
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Fredrik, (...) Please install following the instructions (INSTALL-cygwin) which you cite and let us know how you fare. I believe it should work. If it does work let us know (reply to this message) and I'll add WinME to the list of supported (...) (23 years ago, 25-Apr-02, to lugnet.robotics.rcx.legos)
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| | Who makes the lego webcam?
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I know lego makes the casing and stuff but who makes the camera internals? Also, can you use it under linux? (23 years ago, 25-Apr-02, to lugnet.robotics)
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| | [OT] cats (was RE: Not totally satisfied with the Lego Mindstorm concept: Mathematical variables and direct connection PC/mechanical device)
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(...) there is a school of thought that says there is no such thing as too much time spent dismembering cats (23 years ago, 24-Apr-02, to lugnet.robotics)
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| | install on Windows ME?
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Hello. I wonder if it's possible to install legOS 0.2.6 according to the new docs at: (URL) on Windows ME? If not I wonder which version would be ok to install? (23 years ago, 24-Apr-02, to lugnet.robotics.rcx.legos)
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| | Re: Interactive communication with the RCX
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I don't think collision detection will be possible since the hardware/firmware does a checksum (at least in lego firmware), and no message is provided to the VM software (LASM), this prevents ACK/NAK protocols working. The Message() function does (...) (23 years ago, 24-Apr-02, to lugnet.robotics.rcx)
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| | Re: Two RCX with one IR-Tower
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The 'usual' way to get status data is to poll the the RCX memory for status information, but you can't do that because of the number of RCX bricks; so how about getting each RCX to send a response message (or series of messages) to the PC encoding (...) (23 years ago, 24-Apr-02, to lugnet.robotics.rcx)
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| | OfficeRunner
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Hi, i've uploaded some Pictures and *.DAT files to (URL) is a small car style modell with 2 drive motor engine and a normal rack 'n pinion steering, 2 rotation sensors. 1 for the steering angle and one for the distance. It is very powerfull. Can (...) (23 years ago, 24-Apr-02, to lugnet.robotics)
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