 | | train control
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hi I want to use rcx to control a lego train, but the fact that lejos only have 7 levels makes it dificult to set the speed. Jürgen Stube wrote in september2001: "Yes, the standard LEGO routines make it very hard to control speed. Basically with an (...) (22 years ago, 28-Jun-04, to lugnet.robotics.rcx.java)
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| | RE: Bluetooth and firmware query
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Mike, If you're interested, pbForth replacement firmware may be the answer for many of your issues. My serial driver for the RCX is a straight half duplex that turns off the receiver when transmitting to avoid echoes from the IR. It could be (...) (22 years ago, 5-Apr-04, to lugnet.robotics.rcx.java, lugnet.robotics.rcx.legos, lugnet.robotics.rcx.robolab)
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| | Bluetooth and firmware query
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As some of you may know, we have been hacking RCXs and adding bluetooth modules. What would make life easier is some help modifying the firmware to increase the speed of the serial protocols to the max the Hitachi chip can handle, which is a lot (...) (22 years ago, 5-Apr-04, to lugnet.robotics.rcx.java, lugnet.robotics.rcx.legos, lugnet.robotics.rcx.robolab)
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| | LejWay (Re: Legway with Standard Lego Light Sensors)
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Salut Philippe, hi everybody, (...) a Lejos version. The hardware is the same with two sensors, and the program is loosely based on yours. Tweaking was not easy, but with a little luck the program below now manages to stand on a sheet of white paper (...) (22 years ago, 17-Mar-04, to lugnet.robotics, lugnet.robotics.rcx.java)
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| | Re: Driver for Linux USB Tower
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How did you do to specify that it is an 2.4.20-4GB-athlon kernel version? When I'm trying to compile it using : ./configure make su make install the complier says : /lib/modules/2.4.20-...usbtower.o was compiled for kernel version 2.4.20-4GB while (...) (22 years ago, 10-Mar-04, to lugnet.robotics.rcx.java)
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| | Re: Voltage>10V????
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Hi, I think it is better to continue the discussion here so everybody can profit. (...) The difference is probably negative, often the voltage increases after batteries get a little exercise, maybe because they get warmer. Can you try to display it (...) (22 years ago, 10-Mar-04, to lugnet.robotics.rcx.java)
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| | Re: Voltage>10V????
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Hi, (...) maybe your RCX is broken? What value do you get, >28000? Jürgen (22 years ago, 9-Mar-04, to lugnet.robotics.rcx.java)
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| | Voltage>10V????
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Hi and thanks to all that answered my questions. I'm using the method 'getVoltageMilliVolt()' in my robot. But i don't understand the value that i get, more than 10000 mV, why? if 9600mV is the total voltage that batteries provide. Bye and thanks (...) (22 years ago, 9-Mar-04, to lugnet.robotics.rcx.java)
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| | rcx communications
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hello, for the needs of a robotic course, I am looking for programs for 2 rcx that will make 2 robots communicate and enable some "team play". if you have examples to send me, I will be pleased to get some help. my email: gros_chacal@hotmail.com (...) (22 years ago, 2-Mar-04, to lugnet.robotics.rcx.java)
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| | Re: getVoltage???
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(...) That's not true. The accuracy is exactly the same, as the value is calculated from the internal one and none is lost through rounding. Jürgen (22 years ago, 25-Feb-04, to lugnet.robotics.rcx.java)
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| | Re: getVoltage???
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Hi Sole, I've used the getVoltageMilleVolt() in projects to measure how much voltage was used to complete a task. It is the most granular, hence the best accuracy. Don't worry about the other methods. The getVoltageMilleVolt() method is all you (...) (22 years ago, 25-Feb-04, to lugnet.robotics.rcx.java)
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| | getVoltage???
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Hi!!! I'm trying to test my robot executing certain programms. I take the voltage value in mV with the method getVoltageMilliVolt() before and after the execution. Then i subtract these values in order to get the voltage wasted. But i don't really (...) (22 years ago, 24-Feb-04, to lugnet.robotics.rcx.java)
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| | Re: where leJOS firmware ?
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(...) In RAM, as specified. RAM will hold onto the data just fine, as long as you supply power to it. And the RCX RAM is powered, via battery (that's why if you remove the batteries, you loose the firmware... and everything else). (22 years ago, 12-Feb-04, to lugnet.robotics.rcx.java)
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| | Re: where leJOS firmware ?
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(...) The 32K RAM in the RCX is powered by the batteries even when the RCX is turned off. This is why the firmware (leJOS or otherwise) does not get erased when you turn the unit off. But if you remove the batteries for a few minutes, it does get (...) (22 years ago, 12-Feb-04, to lugnet.robotics.rcx.java)
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| | where leJOS firmware ?
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Hi everybody. I'm trying to guess where exactly the leJOS firmware is stored. All domcuments i've read say that it's in the 32K RAM. But i ask my self why they say RAM; if you turn off the RCX neither the firmware or the user programms doesn't (...) (22 years ago, 12-Feb-04, to lugnet.robotics.rcx.java)
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| | communication pc/rcx
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hello, for the needs of a robotic course, I need to find a lejos program for the rcx. the program running on the pc side is supposed to ask the x,y coordinates of a point and then, when entered, transfer them to the rcx, then, whith the program (...) (22 years ago, 12-Feb-04, to lugnet.robotics.rcx.java)
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| | RotationNavigator again, does it have a bug?
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I have another problem with the RotationNavigator class. I try to program a navigating, behavior controlled robot. At the moment it has two behaviors: behavior1 (b1): moving to a specific point with gotoPoint(...) and back to the starting point with (...) (22 years ago, 5-Feb-04, to lugnet.robotics.rcx.java)
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| | Re: RotationNavigator accuracy
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"Michael Wisse" <mwisse@hs-harz.de> wrote in message news:40065F0D.70202@...harz.de... (...) a (...) Check out (URL) the "Peeves" Mindstorms robot. If page is not accessible then just do a search on "peeves mindstorm lego" and you'll probably find (...) (22 years ago, 15-Jan-04, to lugnet.robotics.rcx.java)
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| | Re: RotationNavigator accuracy
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Hi Robert, thanks for your response. Indeed, the main problem seems to be slippage. The more speed the motors produce, the bigger the slippage is and the less is the resulting angle. Probably a tank is bad for odometric navigation. It is a pitty, (...) (22 years ago, 15-Jan-04, to lugnet.robotics.rcx.java)
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| | Re: RotationNavigator accuracy
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(...) rotation sensor counts tread rotation, but, because of skidding, the tank doesn't turn exactly the same way as treads do (...) rotation point position/drive length depends on tread width, center of weight position, speed and geometry of treads (...) (22 years ago, 14-Jan-04, to lugnet.robotics.rcx.java)
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