 | | Re: RCX Virus? - battery output and RCX performance
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(...) I think that NiMH should be up to the task at that power level (difference between NiMH and NiCd occur at much higher discharge rate). But maybe there is one or more dead cell that cant't hold its charge? Since NiMH provide 7.2V instead of 9V, (...) (19 years ago, 19-May-06, to lugnet.robotics)
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| | Re: RCX Virus? - battery output and RCX performance
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(...) The Lego geared motors can pull about 250 mA when stalled, and close to that when heavily loaded. So for three motors, that may be more current than your batteries can deliver. Rechargeable batteries, esp NiMH, don't deliver the same peak (...) (19 years ago, 19-May-06, to lugnet.robotics)
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| | Ultrasonic sensor interactions
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Can someone from the MDP comment on how multiple robots using the ultrasonic sensor interact. It is possible to use this sensor reliably when one or more other robots nearby are using theirs? -Tim (19 years ago, 19-May-06, to lugnet.robotics)
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| | Re: RCX Virus?
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ok, I finally got to trying some of the stuff you recommended. I recharged the batteries and tried downloading the firmware. It can run the whole program without the motors being plugged in. It can even run the program with all motors plugged in but (...) (19 years ago, 19-May-06, to lugnet.robotics)
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| | Re: Thoughts
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Hi Andrew, (...) there are actually 3 I/O lines on each sensor port: - 1 legacy sensor A/D with appropriate power supply on the same line. - 2 digital I/O lines, one of which can also be configured as analog in. The remaining lines are 2 GND pins (...) (19 years ago, 19-May-06, to lugnet.robotics)
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| | Re: Thoughts
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(...) That's correct. In fact, the only completely digital sensor in the NXT set is the ultrasonic sensor. -- David Schilling (19 years ago, 18-May-06, to lugnet.robotics)
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| | Thoughts
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While sitting in an incredibly boring IB Spanish I class this afternoon (no teacher=no work=no progress=boredom=idle thoughts), I had an idea. It may have been said already in the flood of NXT-based messages which crossed my inbox several months (...) (19 years ago, 18-May-06, to lugnet.robotics)
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| | Re: Lego Research- Please Help!
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Glad to help... I have an interest, also, in how to use these types of products to create interest in the math/science subjects. There is so much information on the Internet and from organizations like FIRST/FLL... good luck. Jim -- View this (...) (19 years ago, 18-May-06, to lugnet.robotics)
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| | Re: RCX Virus?
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(...) The original firmware is a very stable piece of software. The only moment that we ever had serious problems with it was linked to our robot GASTON while being used in the same room with a 10 desktop Mindstorms robotics course. Some parasite IR (...) (19 years ago, 16-May-06, to lugnet.robotics)
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| | Re: RCX Virus?
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(...) I use rechargeable batteries too but I use Rayovac Renewals, Manganese Alkaline which have a full-charge open-circuit voltage of 1.55 and a fairly linear discharge curve (sloping downward, of course). I don't use NiMH rechargeables because (...) (19 years ago, 16-May-06, to lugnet.robotics)
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