 | | RE: true realtime event?
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It's not a true realtime interrupt. Some events may be recognized immediately (e.g. a new "mailbox" message, and some may be recognized on a 100 millisecond background scan (e.g. a "click" event). The event monitoring code does not put the task into (...) (21 years ago, 19-May-05, to lugnet.robotics.rcx.robolab, lugnet.robotics.rcx)
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| | Re: true realtime event?
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I can't answer your actual question, but have a close look at the way your tagline comes across. It looks (unintentionally, I'm sure) like you are closely affiliated with the LEGO company. I googled for your name and found a link to a post where you (...) (21 years ago, 19-May-05, to lugnet.robotics.rcx.robolab, lugnet.robotics.rcx)
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| | true realtime event?
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Hi I am trying to find out whether the event in Robolab is a truly realtime interrupt. Once the event is triggered, does it truly preempt the current running process? Input or suggestion to reading material will be appreciated. ---...--- -------- (...) (21 years ago, 19-May-05, to lugnet.robotics.rcx.robolab, lugnet.robotics.rcx)
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| | tips to handle firmware download problem
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Hi, Is it easy way to unload the firmware from the RCX without having to remove the batteries? I have had problems with downloading firmware... Thank you in advance for your input. -- Elizabeth (21 years ago, 14-May-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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| | RE: rcx brick fail to download
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Yes. Out of desperation, I removed all batteries. After waiting for a few minutes, redownload works fine. Thanks to all who have offered help, as always. -- E (...) (21 years ago, 29-Mar-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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| | Re: rcx brick fail to download
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(...) It could also be the first piece of the communications in progress icon thing. (...) Yeah, remove the batteries and then press the red power button. This will discharge the caps. Then put the batteries back in. I have had odd problems loading (...) (21 years ago, 29-Mar-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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| | Re: rcx brick fail to download
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(...) The upside down arrow in the lower left sounds like the view indicator for output A - but turning the RCX off and on should clear that. The dark circle (I'm guessing in the upper right) sounds like the Datalog indicator (when all four (...) (21 years ago, 29-Mar-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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| | rcx brick fail to download
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Hi, There are two unknown symbols on the RCX, I wonder if anyone could help me to understand it: 1) It had this upside down arrow at the bottom left of the LCD screen. This particular RCX 2.0 brick fails to download the firmware. I tried different (...) (21 years ago, 28-Mar-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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| | RE: roboball experience?
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Thanks to both Tom & Bernard for your input. I noticed they have a roboball compass. Have you incorporated this with the RCX brick? Or, will it work? --thanks in advance! --Elizabeth Mabrey -----Original Message----- From: news-gateway@lugnet.com (...) (21 years ago, 24-Mar-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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| | Re: roboball experience?
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(...) I can't comment on the sensors, but I do have experience w/the balls. The balls are of good quality, well-balanced, and they are a brilliant IR source. (Standard light sensors see them just fine.) However, battery life is quite short (approx. (...) (21 years ago, 23-Mar-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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| | roboball experience?
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Hi I have been looking into the roboball and the sensors kit. (URL) I wonder if there is anyone out there can share the experience of using this with the RCX. What does it take to install on the RCX? Thanks in advance for your help! -- Elizabeth (...) (21 years ago, 23-Mar-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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| | Re: Robolab Programs for FLL
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On Wed, March 16, 2005 4:31 pm, Dick Swan said: (...) Dick, Last night I sent an e-mail to our "keeper of the code". I'll try to get the programs to you today or tomorrow. Do you want the robolab files, or screenshots? I can tell you a little info. (...) (21 years ago, 17-Mar-05, to lugnet.robotics, lugnet.robotics.rcx.robolab)
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| | Robolab Programs for FLL
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The recent threads concerning Robolab and FLL has prompted my interest in how big theRobolab programs for FLL are. Are there any FLL coaches or team members out there who want to send me a copy of their Robolab program for a past competition so that (...) (21 years ago, 16-Mar-05, to lugnet.robotics, lugnet.robotics.rcx.robolab)
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| | Robolab Conference - Call for Papers
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1) The Call for Presentation and Papers for the Annual ROBOLAB Conference (August 15-17th, Austin, Texas) has been extended to APRIL 1st. Please consider submitting a presentation or a paper for the conference. Details are available at the (...) (21 years ago, 16-Mar-05, to lugnet.events, lugnet.edu, lugnet.robotics, lugnet.robotics.edu, lugnet.robotics.events, lugnet.robotics.rcx.robolab)
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| | Northeast Region ROBOLAB Conference
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I don't work for the LEGO Company, but I felt that this announcement should be posted in the official .lego group. -Suz (URL) reposting the announcement of a special event. This conference, at the LEGO Enfield HQ, is a big deal! For those who don't (...) (21 years ago, 14-Mar-05, to lugnet.lego.announce, lugnet.robotics.rcx.robolab, lugnet.robotics, lugnet.events, lugnet.robotics.edu, lugnet.edu, FTX)
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| | Re: power levels clarification
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(...) I couldn't call myself an expert either! In your second way of looking at it, the full voltage and full current are already multiplied to give full power for part of the time. I=(Vcc-Eb)/R Current I, Voltage Vcc, Back EMF Eb and motor (...) (21 years ago, 14-Mar-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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| | Re: power levels clarification
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Hi Mark, (...) is it really true that there is a square law for PWM? Can you explain the reason why this is so? I understand that this is true if you change the voltage (half the voltage gives half the current so a quarter of the power). But I (...) (21 years ago, 14-Mar-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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| | RE: Motor port status for Robolab
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Hi Yes, I indeed did try all those steps, but they did not work. I will greatly appreciate it if you could post the individual vi files. Thank you so much in advance! ---...--- -------- Best Regards, Elizabeth Mabrey -----Original Message----- From: (...) (21 years ago, 13-Mar-05, to lugnet.robotics.rcx.robolab)
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| | Re: Motor port status for Robolab
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(...) You ought to be able to just double click on the .llb. If that doesn't work, try opening it from within Robolab. Either use the open command or the select .vi from the tools pallet. If there are still troubles, let me know and I'll post the (...) (21 years ago, 13-Mar-05, to lugnet.robotics.rcx.robolab)
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| | Re: power levels clarification
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(...) Others have explained Pulse Width Modulation. However, if the kids are old enough to understand the difference between linear (straight line) and square law (curving ever upwards) and electrical voltage, resistance and power, you could say (...) (21 years ago, 13-Mar-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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