 | | Re: Question?
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(...) No, there's no bridge in the RCX, just a pull-up to 5V (10kOhm IIRC). If you look at the schematics (say at (URL) see that there is another bridge rectifier in the sensor between ground and the raw sensor output. The ground half of the bridge (...) (23 years ago, 4-Feb-02, to lugnet.robotics)
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| | Re: true tcp/ip on the RCX
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(...) The C64 server survived the "Slashdot attack" without problems, even though it served tenths of thousands of pages over a period of only a few hours. Since it is configured to allow only 10 simultaneous connections, it could more or less serve (...) (23 years ago, 4-Feb-02, to lugnet.robotics.rcx.legos)
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| | Re: JAVA for 9751 Lego interface - SOS
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(...) It seems this thing connects to a serial port. So you need a Java interface to the serial port like rcxcomm, and you need to write a few classes that talk to the thing (see (URL) would be nice to have some common abstractions of the RCX (...) (23 years ago, 3-Feb-02, to lugnet.robotics)
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| | Re: multiplexor and legOS
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(...) Don't ask me for a cite, but I seem to remember something about msleep only having 20ms granularity. If that's the case, your msleep(10) is either not sleeping at all or is sleeping 20ms, either one of which could cause problems. I'd suggest (...) (23 years ago, 4-Feb-02, to lugnet.robotics.rcx.legos)
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| | Re: Question?
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(...) My guess (having never looked at the schematics, or taken one apart) is that when connected backwards, "dark" would be 0V and "light" would be -8V. Again, a simple bridge rectifier (this time in the RCX) would get it sorted out. It might be (...) (23 years ago, 4-Feb-02, to lugnet.robotics)
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| | Re: Question?
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(...) What I don't understand is how this works if the sensor is connected backwards. Sure, a bridge rectifier will get the power sorted out but how does the sensor send back a voltage in the right range? If say "light" is 8V and "dark" is 0V then (...) (23 years ago, 3-Feb-02, to lugnet.robotics)
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| | Re: multiplexor and legOS
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well anyone who looked at the code I attached may have notcied that I had one of the msleeps commented out. Oops, with this now uncommented I at least see the second and third light sensors pulse on, but only for an extremely short time. Suring the (...) (23 years ago, 3-Feb-02, to lugnet.robotics.rcx.legos)
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| | This week in Robotics:
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THIS WEEK IN ROBOTICS: Here is a calendar of events coming up this week - February 2rd - 9th, 2002. Details are on our web site at (URL) you know of an upcoming event of have a robotics club or organization, please drop us a note at (...) (23 years ago, 3-Feb-02, to lugnet.robotics)
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| | Re: Power to RCX
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Regarding the data sheet for the Melexis MLX1040B that everyone is talking about, and which I've been looking for for years.... This link: (...) (URL) comes back as NOT FOUND The fact that some people are claiming to have seen it implies that it was (...) (23 years ago, 3-Feb-02, to lugnet.robotics.rcx)
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| | Vision Command $29.99 @KB Toys online
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FYI - at least their markdowns are sometimes worthwhile. This was online through what used to be eToys - any KB toys should work. Almost as cheap as the eToys markdowns. There's still the Windows 98 requirement but...... (24 years ago, 2-Feb-02, to lugnet.market.shopping, lugnet.robotics)
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| | multiplexor and legOS
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Does anyone have expierence using the active multiplexor sold by www.mindsensors.com with legOS? If you are not farmiluar with this multiplexor it is really cool as it lets you multiplex three active sensors on one port. You tell the mux which "sub" (...) (24 years ago, 2-Feb-02, to lugnet.robotics.rcx.legos)
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| | Re: "Servo" Driver for NQC
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(...) That was explained earlier. They are using an 8 bit number to store the *pattern* of the modulation. With 8 bits, there are only 8 different ratios of 1's to 0's - and one of those is to have no power at all. Hence there are seven power (...) (24 years ago, 2-Feb-02, to lugnet.robotics)
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| | Re: "Local Positioning System" for lego-vehicles with mice
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Hi, if you are interested : sources now available (URL) (24 years ago, 2-Feb-02, to lugnet.robotics.rcx.legos)
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| | LNP + USB under windows
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Hi, has anybody experience in communicating with the RCX over USB (Windows)? So far I managed to get legOS working with the USB-patch from Jin Sato; then I tried to use winLNP, but it didn't work (the light in the tower is not blinking) Now I'm (...) (24 years ago, 1-Feb-02, to lugnet.robotics.rcx.legos)
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| | Re: true tcp/ip on the RCX
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Ok, the website is up at: (URL) Christ (24 years ago, 2-Feb-02, to lugnet.robotics.rcx.legos)
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| | Re: Power to RCX
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"Matthias Jetleb" <Jetleb@Netcom.ca> wrote in message news:3c5b6892.134862...net.com... [snip] (...) Check out this timely post: (URL) this is indeed the same part, then it looks like 12V is the max. (Figure 1 of the datasheet is a little confusing, (...) (24 years ago, 2-Feb-02, to lugnet.robotics.rcx)
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| | Re: Power to RCX
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I investigated this issue a while back an have taken apart all four of my RCX's (1.0 w. adapter, 1.0 w/o adapter, and 2 2.0's from an RIS1.5 and and RIS2.0). They all have internal voltage regulators. I've written the number down somewhere on this (...) (24 years ago, 2-Feb-02, to lugnet.robotics.rcx)
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| | Re: Question?
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The three main outputs are Pulse Width Modulated. These are generally used for motors, but work for lights as well. The three main "inputs" can use "active" sensors that require power and can therefore be considered as outputs in their own right (...) (24 years ago, 2-Feb-02, to lugnet.robotics)
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| | Re: Constructopedia replacement
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I bought an all German RIS2.0 at the Sears Clearance Center in Brampton a few weeks ago (how it ever landed in Canada, I'll never know). Anyway, I asked Lego for replacement manuals an received them within a week, no questions (or proof) asked. (...) (24 years ago, 2-Feb-02, to lugnet.robotics)
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| | Re: "Servo" Driver for NQC
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(...) Yes, but only one of 8 settings (why not all 256??? I don't understand why they limited this). Sometimes only 8 settings doesn't give you enough finesse. Matthias Jetleb (24 years ago, 2-Feb-02, to lugnet.robotics)
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