 | | Re: Any experience with measuring rotations?
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(...) Well... there's two things here, and Steve solution actually addresses them both. Do you actually need a continual series of states, and the "weight" of the thing on the end of the beam, or just know if something *is* on the end of the beam? (...) (18 years ago, 20-Jan-07, to lugnet.robotics.nxt)
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| | Re: Any experience with measuring rotations?
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(...) In the document (URL) find a paper-disk with grey gradient. The document was part of my presentation at the 2005 Annual Robolab Conference in Austin/TX. There was a second part (URL) don't remember, if those documents ever have been available (...) (18 years ago, 20-Jan-07, to lugnet.robotics.nxt)
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| | Re: Any experience with measuring rotations?
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(...) I am not really an NXT guru, but seems the best way would be to simply measure the distance and calculate the angle. Tommy Armstrong (18 years ago, 20-Jan-07, to lugnet.robotics.nxt)
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| | Re: Any experience with measuring rotations?
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(...) I am not rally an NXT guru, but seems the best way would be to simply measure the distance and calculate the angle. Tommy Armstrong (18 years ago, 20-Jan-07, to lugnet.robotics.nxt)
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| | Re: Any experience with measuring rotations?
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(...) Don't mess with colors. Just use a gradient. You'll have a mostly linear set of values. With my black & white studs, there are also several shades of gray in between (like a little black & mostly white...) (...) no. :) Steve (18 years ago, 20-Jan-07, to lugnet.robotics.nxt)
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| | Re: Any experience with measuring rotations?
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(...) "It's foolproof!" (...) This sounds like a good idea. I'm thinking I'm going to have to work out a sequence of more than just two shades, but that's what weekends are for, right? So, if I could make of sequence of colors that have increasing (...) (18 years ago, 20-Jan-07, to lugnet.robotics.nxt)
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| | Re: Any experience with measuring rotations?
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(...) Easy. A light sensor. Point the sensor at a disk that's shaded from white to black. I've used that to detect the distance a robot is from a wall (wall following), using just a black & a white dot (1x1) which are moved in front of the sensor. (...) (18 years ago, 20-Jan-07, to lugnet.robotics.nxt)
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| | Any experience with measuring rotations?
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Hi all, I am working on a "project" where I want to measure some reasonably small rotations, things on the order of +/- 10 degrees or less. Just to make it hard, the force acting on the thing being rotated is small, like, completely hypothetically, (...) (18 years ago, 20-Jan-07, to lugnet.robotics.nxt)
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| | Re: Like A Rock Crawler Hauler
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(...) Very cool Steve... I can also atest the turn radius will stink since I did the same mod to the red tow truck set last year. You said you are using old style light sensors...Interfacing them to the NXT with the converter cables I assume? B (18 years ago, 20-Jan-07, to lugnet.robotics.nxt, lugnet.robotics, lugnet.org.us.laflrc)
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| | Re: Text Based Programming for NXT - pbLua is Available
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(...) Nothing, it restarts back to blank screen, samba clicking mode. (...) Same thing. I also tried pulling the batteries for a few seconds. Telling USB Probe to refresh. 100 different combinations of resetting with and without usb plugged in, (...) (18 years ago, 20-Jan-07, to lugnet.robotics.nxt)
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| | Re: Text Based Programming for NXT - pbLua is Available
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(...) Tony, thanks for the work so far. What happens if, after the firmware is loaded you do any of the following: 1. Reset the NXT (press reset for less than 1 second) 2. Unplug the USB cable, wait 5 seconds, and plug it back in again (...) Here's (...) (18 years ago, 20-Jan-07, to lugnet.robotics.nxt)
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| | Re: Text Based Programming for NXT - pbLua is Available
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Here are my notes on what I've been able to accomplish so far in OSX on my MacBookPro. Loading pbLua firmware on nxt running standard firmware: 1. plugin usb 2. rename nxt-lua.bin to nxt-lua.rfw 3. open NXT-G, goto Tools -> Update NXT Firmware. (...) (18 years ago, 20-Jan-07, to lugnet.robotics.nxt)
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| | Re: Apology
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(...) Uh, Dave. Aren't you an american? Last time I checked, Canada was on the top of the north American continent :^P Kevin (18 years ago, 19-Jan-07, to lugnet.robotics.nxt)
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| | Re: Text Based Programming for NXT - pbLua is Available
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(...) Ralph, I can wait for API-docs 8-) In the meantime I try to find out how USB-communication (with libusb and terminalemulation) can work on OSX (10.4.x) and Linux. Is the NXT acting like an USB-Modem (asynchronous communication) What are the (...) (18 years ago, 19-Jan-07, to lugnet.robotics.nxt)
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| | Re: Text Based Programming for NXT - pbLua is Available
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(...) I think pbLua is actually running. The problem is that the signon screen does not get displayed until the USB connection is made. Which is why I need to find out how USB enumeration happens on a Mac. The pbLua firmware makes the NXT look like (...) (18 years ago, 19-Jan-07, to lugnet.robotics.nxt)
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| | Re: Text Based Programming for NXT - pbLua is Available
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(...) I'm still building and finalizing the API. I should probably start posting some questions on this forum... Eventually I'd like to get the API and the Lua table out there but I need to get docs set up. If you can help with install instructions (...) (18 years ago, 19-Jan-07, to lugnet.robotics.nxt)
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| | Like A Rock Crawler Hauler
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We've been playing around with Rock Crawlers for a while, so I finally put up a web page with a bunch of pictures and descriptions on it. (URL) addition to my Rock Crawler (and a link to John's trucks), about half way down the page, there are (...) (18 years ago, 19-Jan-07, to lugnet.robotics.nxt, lugnet.robotics, lugnet.org.us.laflrc)
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| | Re: Text Based Programming for NXT - pbLua is Available
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(...) It sounds like you DID get it loaded right here. At this point, I believe you need to unplug the NXT from the USB, then reconnect it. (...) You need to reset the NXT. Press and hold the reset button for 5 seconds. Then, you should be able to (...) (18 years ago, 19-Jan-07, to lugnet.robotics.nxt)
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| | Re: Text Based Programming for NXT - pbLua is Available
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What is the method to load the pbLua firmware, preferably in OS X? It's a .bin file so NXT-G doesn't recognize it. I tried renaming it to a .rfw file and it succeeds but then gets stuck in samba click mode. Then I tried libnxt's fwflash, holding (...) (18 years ago, 19-Jan-07, to lugnet.robotics.nxt)
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| | Re: Apology
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(...) You know, if this was an international forum, you'd at least expect the second letter of Jürgen's name to print properly... Jason R (18 years ago, 18-Jan-07, to lugnet.robotics.nxt)
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