 | | University meets NXT
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Just enjoy this site: (URL) (in German) They developed a project "NXT meets Matlab" at (URL) (in English) (17 years ago, 16-Feb-08, to lugnet.robotics)
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| | 5th METU Robotics Days @Ankara/TURKEY
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If you want to see the developments in robotics, learn how to make a simple robot, and compete your own robots with others, don't miss METU ROBOTICS DAYS! In order to participate in the competitions and join the workshop study, sign up now from the (...) (17 years ago, 15-Feb-08, to lugnet.robotics.events)
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| | Some questions on batteries and AC power for lego
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There seems to be a difference between the voltage outputs of battery boxes and wall powered sources like the train speed regulators. From just listening to the sounds that motors make, a battery box puts out the same voltage as a speed regulator on (...) (17 years ago, 15-Feb-08, to lugnet.technic, lugnet.robotics, FTX)
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| | NXT on the Subway
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LOL, the School in Brooklyn where I teach Robotics, gave me an NXT Kit (consumer version) to create a robot for them to use at the Science Fair. [LEGOSet 8527] I did not have a bag to carry the box, so I carried it on the Subway. LOL, everyone was (...) (17 years ago, 14-Feb-08, to lugnet.robotics.nxt, lugnet.general, FTX)
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| | Re: nxt controller specification
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(...) Strangely enough, the AVR does NOT read motor encoders, the lines coming from the encoder directly enter the ARM processor... Philo (17 years ago, 14-Feb-08, to lugnet.robotics.nxt)
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| | Re: nxt controller specification
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(...) Yep. But note that Philo was talking about *torque*, not force. A torque of 50 N•cm means that it could supply a force of 50 N with a lever arm of 1 cm, or a force of 500 N (more than 100 lbs) for a lever arm of 1 mm... but that would imply an (...) (17 years ago, 13-Feb-08, to lugnet.robotics.nxt)
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| | RE: nxt controller specification
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Thank you for clarifying this, Brian. I was reading (URL) It stated that the NXT with "Stalled torque) up to 50 N.cm. 50N... it equates approximately 10lbs?! That is without any further gearing down, but just the NXT motors!? Wonder if anyone has (...) (17 years ago, 13-Feb-08, to lugnet.robotics.nxt)
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| | Re: PF IR RC protocol released! - NXC
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(...) Many thanks John and Jason for your work on this. I am a comparative newbie to NXC programming but I have my NXT working like a PF IR remote handset now that I set up the sensor correctly! NXC has given me the programming environment to (...) (17 years ago, 5-Feb-08, to lugnet.general, lugnet.technic, lugnet.trains, lugnet.robotics)
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| | Re: Power Functions infra-red RC protocol released!
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(...) Many thanks John and Jason for your work on this. I have been using the NXC functions to control PF IR receivers from my NXT. TLG has just released the following information: "We have been testing the LPF RC Receiver today and discovered an (...) (17 years ago, 6-Feb-08, to lugnet.general, lugnet.technic, lugnet.trains, lugnet.robotics)
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| | Re: nxt controller specification
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(...) Yes. The AVR is responsible for a number of things, including PWM and encoder reading on the motor ports (IMS), the reading of the front panel button state, power management, and A/D from the input lines for analog sensors. It is not (...) (17 years ago, 13-Feb-08, to lugnet.robotics.nxt)
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| | nxt controller specification
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Hi, I wonder if anyone may be familiar with the spec about the nxt brick: I found this on the ww.hobbyengineering.com . NXT Brick * 32-bit ARM7 microcontroller * 256 Kbytes FLASH, 64 Kbytes RAM * 8-bit AVR microcontroller * 4 Kbytes FLASH, 512 Byte (...) (17 years ago, 13-Feb-08, to lugnet.robotics.nxt)
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| | Re: Power Functions infra-red RC protocol released!
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(...) It looks like the PF IR receiver will be very useful for train control and other continuous duty applications. But the only remote available is for intermittent operation. So the only LEGO option to running in PWM/continuous duty is to use a (...) (17 years ago, 31-Jan-08, to lugnet.technic, lugnet.trains, lugnet.robotics)
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| | BricxCC Scripting
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BricxCC now has preliminary but fully functional support for compiling and executing PC-based scripts to control your programmable brick (NXT, RCX, Spybot, whatever). These scripts can be edited in BricxCC with syntax highlighting and (coming soon) (...) (17 years ago, 12-Feb-08, to lugnet.robotics, lugnet.robotics.nxt, lugnet.robotics.rcx)
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| | Re: Power Functions infra-red RC protocol released!
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(...) Here's my fantasy: implementing prototypical ATC (Automatic Train Control) signalling with sensors (e.g. counting coupler magnets, as the best functional equivalent to axle counters) at block boundaries to detect block occupancy, and IR (...) (17 years ago, 2-Feb-08, to lugnet.technic, lugnet.trains, lugnet.robotics)
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| | Python on the NXC
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Hey robo folks, Abstract: I want to run Python on the NXT, not on my PC and connect to the NXC remotely. Did I understand the architecture correctly? Any hints on translation? As far as I know, the NXT is so far lacking support for high-level (...) (17 years ago, 9-Feb-08, to lugnet.robotics)
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| | Researchers use Lego Mindstorms robot to improve ATM security
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(URL) the article: "When the researchers created their prototype, which is called Undercover and was built with a Lego Mindstorms robot, they attempted to come up with a system that would be easy to use but would limit vulnerability to common (...) (17 years ago, 8-Feb-08, to lugnet.robotics, lugnet.robotics.nxt, lugnet.mediawatch)
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| | Re: Power Functions infra-red RC protocol released!
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(...) rats! (...) Thanks for the heads up, John Looks like I really have to start brushing up on my NXT 'bot building now. Dave K (17 years ago, 4-Feb-08, to lugnet.general, lugnet.technic, lugnet.trains, lugnet.robotics)
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| | Re: Power Functions infra-red RC protocol released!
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(...) Dick Swan's replacement RCX firmware also does not support directly manipulating the IR led and it doesn't support microsecond timing control. Both of these features would be required in order to send the IR messages to a Power Function or R/C (...) (17 years ago, 4-Feb-08, to lugnet.general, lugnet.technic, lugnet.trains, lugnet.robotics)
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| | Re: Power Functions infra-red RC protocol released!
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In lugnet.general, Jason J Railton wrote: <snip> (...) I'm runnign Dick Swan's alternate firmware that he sent me a while back. Dave K (17 years ago, 4-Feb-08, to lugnet.general, lugnet.technic, lugnet.trains, lugnet.robotics)
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| | Re: Power Functions infra-red RC protocol released!
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(...) I doubt that's possible - a bytecode program just can't run fast enough to do the timing for the IR commands, on either brick. The NXT can only manage it because it sends them over a slow comms link to a HiTechnic IRLink sensor, then that (...) (17 years ago, 3-Feb-08, to lugnet.general, lugnet.technic, lugnet.trains, lugnet.robotics)
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