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 | | Re: Another update for WIRRL
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| "Gareth Bestor" <bestorga@us.ibm.com> wrote in message news:H4E4uq.JvL@lugnet.com... (...) in (...) eyeing (...) receiver (...) reveiver (...) I've also followed this intresting thread. And now I'm wondering why Lego have used the infrared (...) (22 years ago, 22-Oct-02, to lugnet.robotics)
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frequency
(score: 1.479)
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| | Re: Project WIRRL Update
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| I'm looking for an RF solution for PC-RCX communication as well, been thinking along very much the same lines as Rob seems to have so far, I too was pondering how to deal with TX/RX switching (though I've not got as far as building a circuit, and (...) (22 years ago, 21-Oct-02, to lugnet.robotics)
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frequency
(score: 1.479)
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| | RE: Another update for WIRRL
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| I just noticed at least one glaring error with the new schematic... Say, for argument, an RCX sends "1001", which, in IR, would be "0110". The IR detector of WIRRL would do nothing for the first bit ("0"), but the next bit ("1") should be sent over (...) (22 years ago, 22-Oct-02, to lugnet.robotics)
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frequency
(score: 1.479)
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| | Re: Electronic brick (1968) schematics?
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| (...) I've recently reverse-engineered the earlier unit from the 118 train set: Circuit: (2 URLs) would gladly do the same with a 139 unit if someone has one open. If anyone has a 139 unit but does not want to open it, please could they post the (...) (14 years ago, 13-Apr-10, to lugnet.trains)
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post, frequency
(score: 1.478)
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| | Re: X-10 Wireless Camera Train Car
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| (...) Michael Hader built one of these in 2000 and brought it to a few NGLTC shows. Michael's car had headlights for the tunnels and was very functional in design. It didn't have a motor of its own, so it was either towed or pushed around the track. (...) (22 years ago, 23-Nov-02, to lugnet.trains)
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frequency
(score: 1.473)
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| | RCX and batteries
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| Is the RCX considered a "high-drain" or "moderate-drain" device? If one is using the motors, I'd almost say yes, but how does frequency of use factor into this? Is anyone using rechargeable NiMH batteries in their RCX? What kind of performance to (...) (22 years ago, 24-Nov-02, to lugnet.robotics)
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frequency
(score: 1.473)
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| | Re: Why...
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| -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 (...) The OS should not impose conditions on the programmer. Just put in the docs "numbers less than 5ms (the default) are not recommended" or something to that effect. (...) My code isn't a task. It's (...) (22 years ago, 23-Nov-02, to lugnet.robotics.rcx.legos)
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frequency
(score: 1.473)
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| | Re: Polling sensor values with wait_event
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| Thomas, I had a thought about this situation. You could write a function that sets a flag when the event is triggered, do nothing otherwise. You could call this function from within each of the tasks you write (at a somewhat high frequency ... say (...) (22 years ago, 28-Nov-02, to lugnet.robotics.rcx.legos)
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frequency
(score: 1.472)
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| | Re: Feedback thoughts?
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| (...) That's true, I used to always check Brickshelf's recent updates, but now I never check them. Lately I only view the folders in thumbnail form. Of course I would help support Brickshelf if a monetary donation was needed. (...) I disagree here, (...) (22 years ago, 17-Dec-02, to lugnet.general)
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frequency
(score: 1.468)
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| | Re: Posting frequency?
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| I think what we can safely conclude from this thread is that: 1) there are lies, damned lies and statistics (I apparently have posted 287, 321 or 481 times in 2002) 2) no matter how you caculate it, Larry posted most :-) 3) people need to learn to (...) (22 years ago, 2-Jan-03, to lugnet.people)
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frequency
(score: 1.468)
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| | Re: Posting frequency?
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| (...) Indeed there are. The real fun comes when you start treating the first two as the third. (Not to be confused with treating the third as either of the first two of course :-) ). I think that this thread must be the longest (chronologically) on (...) (22 years ago, 2-Jan-03, to lugnet.people)
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frequency
(score: 1.468)
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frequency
(score: 1.468)
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frequency
(score: 1.468)
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frequency
(score: 1.467)
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| | Re: A Generic Idea
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| Nick Tarleton wrote: > I don't know how fast the speaker can change frequency > or how soon it can be reacted to, so I can't get a bandwidth estimate. The telephone system can (at best) transmit at 56Kbaud (that's the speed of the fastest possible (...) (22 years ago, 5-Jan-03, to lugnet.robotics)
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frequency
(score: 1.466)
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| | Re: 8475 -- motors and steering Oh My
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| (...) Th - Time signal is High Tl - Time signal is Low Tt - total time ------________ Th Tl <---- Tt --------> Matthias Jetleb P.S.: Th/Tt is defined as the duty cycle, expressed as a percent. Therefor: Th=2ms, Tt=3ms = 66% duty cycle. This is (...) (22 years ago, 30-Dec-02, to lugnet.org.ca.rtltoronto)
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frequency
(score: 1.466)
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| | Re: A Generic Idea
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| "Steve Baker" <lego-robotics@crynwr.com> wrote in message news:3E171F4A.400050...ail.net... (...) :) (...) inventions (...) I'm (...) IR-connected (...) enough (...) would (...) processing. (...) legally (...) country. (...) at (...) Ok, if radio (...) (22 years ago, 5-Jan-03, to lugnet.robotics)
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frequency
(score: 1.465)
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| | Re: A Generic Idea
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| (...) You could use an alternate firmware that can generate any tone, a custom modulation-demodulation protocol, and a condenser microphone soldered onto a sensor wire to send at reasonable bitrates for robot communication. Of course, it would take (...) (22 years ago, 5-Jan-03, to lugnet.robotics)
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frequency
(score: 1.465)
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| | Re: Interesting BrickOS Timing Results
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| Mark, ANOTHER great find! You are pushing BrickOS to new heights! Ok, so what can we do about this? 1) Provide a constant to set the update frequency at compile time. 2) Provide a variable to set the update frequency at run time. 3) Optimize the (...) (22 years ago, 14-Jan-03, to lugnet.robotics.rcx.legos)
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frequency
(score: 1.464)
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| | Re: I2C device for the RCX
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| (...) Erm...no...you have some trouble with your numbers! 1000us == 1ms so: 4.7us == 0.0047ms !! (...) Yikes! Nooo...ooo! 250ns == 0.25us == 0.00025ms Remember: ms is a millisecond which is 1/1000th second. us is a microsecond which is 1/1000000th (...) (22 years ago, 11-Jan-03, to lugnet.robotics)
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frequency
(score: 1.464)
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