 | | Re: Faster NXT LCD Screen Refresh
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(...) <snip> (...) This is really interesting. If I understand correctly, to get colors, or at least shades of grey, you have to refresh the screen quickly and the "darker" the pixel, the more often it shows up in the pattern. For example, let's say (...) (19 years ago, 22-Mar-07, to lugnet.robotics.nxt.nxthacking)
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| | Re: Adding syscalls/opcodes to NXT-G
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(...) John - I know you don't like this and I agree that the best solution is NI changing their compiler to allow extending firmware with new syscalls. The way things work, I'm afraid, this will not happen anytime soon. I'm trying to suggest (...) (19 years ago, 22-Mar-07, to lugnet.robotics.nxt)
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| | Faster NXT LCD Screen Refresh
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Here's a trick to get a faster rate on the LCD display refresh. It currently takes 16 milliseconds to refresh the NXT LCD. 16 "messages" are sent to the LCD. One message is sent per millisecond. There are two messages from the ARM to the LCD for (...) (19 years ago, 22-Mar-07, to lugnet.robotics.nxt.nxthacking)
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| | Robo Quad - Stage Two and Three
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(URL) Robo Quad - Stage One notes> Stage Two - Completed Stage Three - Completed Stage Four - Work in progress (URL) Robo Quad - Gallery> Stage One - Completed (URL) drive system>> (URL) front paw - top>> (URL) front paw - rear>> (URL) front paw - (...) (19 years ago, 22-Mar-07, to lugnet.announce, lugnet.robotics, lugnet.technic, lugnet.build.mecha, FTX)
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| | pbLua Beta 3 - Available
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All, pbLua beta 3 is available now at: (URL) This new version has the bug in the regulation fixed, and the default motor mode is brake, not float. I've also updated the API docs to correct errors (there are probably more) and added an install doc (...) (19 years ago, 22-Mar-07, to lugnet.robotics.nxt, lugnet.robotics.nxt.nxthacking)
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| | Re: BrickFest™ PDX 2007 - Robotic Easter Egg Hunt
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Do we loose points for melting the eggs? At any rate, it makes the foil stay on better. ;-) --Peter (19 years ago, 22-Mar-07, to lugnet.events.brickfest, lugnet.robotics, FTX)
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| | Re: pbLua Fun at OSX
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(...) Finally, I did something right - by accident! Christian, could I ask you to please send me (off list if you like) some screen shots of what happens when you connect the NXT? I can't remember if I sent you Mac instructions, but you just look (...) (19 years ago, 21-Mar-07, to lugnet.robotics.nxt)
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| | pbLua Fun at OSX
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Hello World, pbLua-Beta2 is out and 90% of my wishes are true now :D Running pbLua with OSX worked out of the box... 1. Flashing NXT and reboot the box once 2. checking for new NXT-Device (ls -la /dev/tty.usb*) 3. connecting with screen to NXT (...) (19 years ago, 21-Mar-07, to lugnet.robotics.nxt)
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| | Re: The standard NXT firmware & the case of the missing opcodes
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(...) I guess what I'm saying is '<<=', 'OP_ASL' and 'OP_LSL' are all the same thing (zero fill). '>>=' means either 'OP_ASR' (smear fill) or 'OP_LSR' (zero fill) depending on whether your target is signed or not. If you wanted direct equivalents (...) (19 years ago, 21-Mar-07, to lugnet.robotics.nxt.nxthacking)
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| | Re: The standard NXT firmware & the case of the missing opcodes
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(...) Having used shifts in Z80 assembly before, I can see the uses of the different types. However, I can't see how I'd want anything other than arithmetical in the NBC opcodes. The only times I used logical, rotating, or with-carry-bit shifts was (...) (19 years ago, 21-Mar-07, to lugnet.robotics.nxt.nxthacking)
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| | Re: BrickFest™ PDX 2007 - Robotic Easter Egg Hunt
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(...) Will, If you do manage to combine RCX & NXT, I expect it will look mashed-up, but unlike all the other stuff at BF, this is not a how-does-it-look competition. No matter how it looks, I'm sure people will cheer for robots that try to give them (...) (19 years ago, 21-Mar-07, to lugnet.events.brickfest, lugnet.robotics)
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| | Re: BrickFest™ PDX 2007 - Robotic Easter Egg Hunt
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(...) I'll give it a whirl! I wouldn't want you to get the NXT prize just because you were the only one entered. :) My 'bot may be a mashup of RCX & NXT. It will likely be horrible ugly, and exhibit questional operational effectiveness, but fame and (...) (19 years ago, 21-Mar-07, to lugnet.events.brickfest, lugnet.robotics, FTX)
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| | Re: Adding syscalls/opcodes to NXT-G
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(...) Can you flesh this out a bit? What do you have in mind when you say "create from it a new program clump"? The current version of the firmware limits the size of this buffer to 64 bytes. I increased that limit in my recent changes to be 800 (...) (19 years ago, 21-Mar-07, to lugnet.robotics.nxt)
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| | Adding syscalls/opcodes to NXT-G
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One of the biggest problems with extending the current FW is that the NI compiler for NXT-G/NXTToolkit is not so flexible. In particular, one can't add new syscalls. Here's a suggestion I would be happy to hear your ideas on - the NXT-G compiler has (...) (19 years ago, 21-Mar-07, to lugnet.robotics.nxt)
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| | Re: Boosting power in a gear train / torque amplifier
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I think one way to do this uses a differential (URL) and a pole reverser (URL). I don't have a picture to hand but the idea is simple. One side of the differential is connected to the low torque "input axle". The differential housing is connected to (...) (19 years ago, 21-Mar-07, to lugnet.technic, lugnet.robotics)
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| | The standard NXT firmware & the case of the missing opcodes
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There are several opcodes defined in c_cmd_bytecodes.h which are missing from the VM implementation in c_cmd.c Here are the ones that are not implemented: //Family: Bit manipulation #define OP_CMNT 0x0A // dest, src #define OP_LSL 0x0B // dest, src (...) (19 years ago, 21-Mar-07, to lugnet.robotics.nxt.nxthacking)
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| | Re: Boosting power in a gear train
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(...) A torque amplifier is EXACTLY what I need; thank you! Now I just need to figureout how to build one. Google has a few pix, two lego ones actually. I hope this will get me where I need to go! Thanks for the help, Rafe (19 years ago, 21-Mar-07, to lugnet.technic, lugnet.robotics)
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| | Re: Boosting power in a gear train
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(...) The original Mindstorms rotation sensor turns very easily - I think that three stud-balls of torque would be plenty to turn it. The more recent NXT stuff is another matter - I don't have a NXT system so I have no clue as to the problems of (...) (19 years ago, 21-Mar-07, to lugnet.robotics)
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| | Re: BrickFest™ PDX 2007 - Robotic Easter Egg Hunt
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(...) The walls are going to be about two inches tall. The houses will be considerably taller than that. Probably on the order of three to five times taller. By the way, there's only a bit over a week before BrickFest. If anyone else is considering (...) (19 years ago, 20-Mar-07, to lugnet.events.brickfest, lugnet.robotics, FTX)
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| | Re: Boosting power in a gear train
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More information about your application would be helpful. The first thought that jumps to mind is "Use a more powerful motor. Duh!". So there must be something that I am missing. There must be some reason you need to use the puny motor. Maybe you (...) (19 years ago, 20-Mar-07, to lugnet.technic, lugnet.robotics)
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