 | | Re: Bump switches and "aggression"
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"Russell C. Brown [RR-1]" <lego-robotics@crynwr.com> wrote in message news:001601c3baeb$9a...apophis... (...) ok :) you are right i was too touchy sorry the threshold's set no problem some of you guys said many great words to me that is precious! (...) (22 years ago, 5-Dec-03, to lugnet.robotics)
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| | RE: Bump switches and "aggression"
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Just set the threshold on your pretentiometer to 50% and you won't hear that traffic anymore! Seriously, Pixel, you have been a cheerful contributor to this list for a couple of years now. You've had creative ideas that you've been most willing to (...) (22 years ago, 5-Dec-03, to lugnet.robotics)
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| | RE: Bump switches and "aggression"
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(...) Creatures (animals and humans) do not scatter in a totally random direction. They scatter at a random vector in a direction opposite the source of whatever startled. That implies that more than one sense is being used to determine source (...) (22 years ago, 5-Dec-03, to lugnet.robotics)
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| | Re: an idea, can someone tell me if this is possible/been done before/etc?
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(...) Yes, I understand that you would have the downward pressure of the step move stop the leg movement by cutting off pressure to the piston(s) driving the foot down. Once this pressure is cut off by the switch, presumably the other legs continue (...) (22 years ago, 4-Dec-03, to lugnet.robotics)
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| | Re: Bump switches and "aggression"
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(...) Easy the bump switch jumps into a RNG, and it's important to understand that the output of a RNG does -not- need to be equi-probable, and it decides. Watch animals when they're startled, they don't stop and think, they jump around for a second (...) (22 years ago, 3-Dec-03, to lugnet.robotics)
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| | Re: Complete instructions for Linux?
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(...) $ tar xvzf brickos.tar.gz $ make or $ apt-get install brickos #for debian user ;-) nanobapt (22 years ago, 4-Dec-03, to lugnet.robotics.rcx.legos)
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| | Re: Search algorithms
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The main problem is of course memory. Under standard firmware, with 32 variables, you're not going to be able to do an A* on much of a grid - 7x7 is about the max, and even then you'd have to fiddle around and store two cells values in a single (...) (22 years ago, 4-Dec-03, to lugnet.robotics)
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| | Re: Bump switches and "aggression"
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"Gordon Elliott" <lego-robotics@crynwr.com> wrote in message news:0f7901c3b9c8$84...gateway... (...) i can see jim's doing good job !!! he's humiliating almost everyone here keep doing jim!!! maybe you will achieve that your posts will go to null (...) (22 years ago, 4-Dec-03, to lugnet.robotics)
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| | Re: Bump switches and "aggression"
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(...) That's nonsense! You are working on the very naive assumption that nothing in the environment is moving except your robot. If your strategy is to reverse direction when the robot bumps into something in *any* direction - then things will go (...) (22 years ago, 4-Dec-03, to lugnet.robotics)
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| | Complete instructions for Linux?
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Is there a complete instruction for installing BrickOS on Linux? I'm particularly interested in details involving creating a cross-compiler and getting the USB tower to work. I've looked at the windows instructions, and have tried to work from them, (...) (22 years ago, 4-Dec-03, to lugnet.robotics.rcx.legos)
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| | Bump switches and "aggression"
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To my thinking there are two approaches to this, really two levels of difficulty, - Make it deterministic, in that if a switch is bumped invert your current trajectory axis, if going forward then reverse, if going R then go L. - Make it more (...) (22 years ago, 3-Dec-03, to lugnet.robotics)
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| | RE: Bump switches and "aggression"
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(...) <SNIP> (...) I think that your example indirectly shows that there are two things to be aware of. Survival is one. Obstacle detection/avoidance is the other. In thinking about it, I can see where there is a fine line between the two. Consider (...) (22 years ago, 3-Dec-03, to lugnet.robotics)
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| | Re: an idea, can someone tell me if this is possible/been done before/etc?
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(...) So the pneumatic switch acts as a pneumatic touch sensor and stops the leg from extending fully. I'll keep that in mind. (...) I understand. Thanks for the explanation. (...) Kevin (22 years ago, 3-Dec-03, to lugnet.robotics)
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| | Re: Bump switches and "aggression"
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(...) Oh I wish I had some of those touch sensors! One person from rtlToronto has a set and there is much envy from me to him. Right now I'm using lamp bricks, which isn't that great, really, but does work :) Thanks for the heads-up! Dave K (...) (22 years ago, 3-Dec-03, to lugnet.robotics)
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| | Re: Bump switches and "aggression"
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(...) go (...) 'bumper'. (...) my (...) me, (...) alternative. (...) There is one solution for staying 100% Lego and putting 4 sensors on the same RCX input. Therefor you should be able to sense which direction you were getting bumped. Lego made (...) (22 years ago, 3-Dec-03, to lugnet.robotics)
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| | Re: Bump switches and "aggression"
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(...) <snip> (...) <snip> I'm very new to this particular thread, but I like Gordon's approach--directional sensors are needed. If I'm travelling forward and something bumps me from behind, I need to know that--If my conditional response is to do (...) (22 years ago, 3-Dec-03, to lugnet.robotics)
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| | Re: Bump switches and "aggression"
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----- Original Message ----- From: "Jim Choate" <ravage@einstein.ssz.com> (...) was (...) ## The original request was to catalog opinions on bump sensors, a "state of the art". Remember the original question was: ** ... and I'm curious if anyone (...) (22 years ago, 3-Dec-03, to lugnet.robotics)
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| | Re: Bump switches and "aggression"
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(...) You should watch my three dogs hunt. If all you've ever seen is a single dog hunt then you know nothing of how dogs actually hunt. They're pack animals, a single dog can't survive in the wild more than a few weeks. Yet three sub-200lb dogs can (...) (22 years ago, 3-Dec-03, to lugnet.robotics)
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| | Re: Bump switches and "aggression"
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----- Original Message ----- From: "Jim Choate" <ravage@einstein.ssz.com> To: <lego-robotics@crynwr.com> ... (...) think (...) ### I think this is an interesting question, relating to complexity and emergent and evolutionary behavior which has been (...) (22 years ago, 3-Dec-03, to lugnet.robotics)
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| | Re: Bump switches and "aggression"
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(...) How exactly, do you want to trigger this 'fight or flight'? It seems to me that a rabbit (for example) would use both of the methods above. If it's running along, and it's nose smacks into a tree (I mean bumps into a tree) the behavior is very (...) (22 years ago, 3-Dec-03, to lugnet.robotics)
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| | Re: Strange BrickOS Timing
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Hi Dietmar, (...) Of course :-) Ciao, Guido (22 years ago, 3-Dec-03, to lugnet.robotics.rcx.legos)
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| | Re: Strange BrickOS Timing
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Hi Guido, (...) That patch referes to an older transfer-protocol. The one we are using now, does not need SUCH a stable timing. But the Output from BrickOS is a lot worse than it was in older versions. I thing Gunther can explain this better, but I (...) (22 years ago, 3-Dec-03, to lugnet.robotics.rcx.legos)
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| | Bump switches and "aggression"
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I mentioned a 'reference platform' for the H18 group I've been working on in a previous post, and I'm curious if anyone will share their views on how they view bump switches and 'behavior'. I'm not interested in a debate but rather a 'collection'. (...) (22 years ago, 3-Dec-03, to lugnet.robotics)
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| | Re: an idea, can someone tell me if this is possible/been done before/etc?
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"Kevin L. Clague" <kevin_clague@yahoo.com> wrote in message news:HpAAsB.1Kpo@lugnet.com... (...) hmm my english is not very well so i'm explaining in weak way let's say your q242 is walking on a flat surface everything is quite well now ahead q242 (...) (22 years ago, 3-Dec-03, to lugnet.robotics)
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| | Roll up, roll up!
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Sunday - December 14 - WAMALUG meeting at GMU - Light Weight Sumo! WAMALUG get togethers are always fun. The upcoming December meeting will be great because we're having a light-weight Sumo contest. Competing 'bots will be subject to a one pound (...) (22 years ago, 3-Dec-03, to lugnet.general, lugnet.robotics, lugnet.org.us.wamalug)
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| | Seeking session/expo coordinators for sculpture/mosaic, castle, mindstorms/technic/robotics
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The BrickFest PDX organizing committee is seeking session/expo volunteers for the following areas: Sculpture/Mosaic Castle Mindstorms/Technic/Robotics These are important areas that don't yet have dedicated coordinators. If you're planning to attend (...) (22 years ago, 3-Dec-03, to lugnet.events.brickfest, lugnet.castle, lugnet.build.sculpture, lugnet.build.mosaic, lugnet.robotics, lugnet.technic, FTX) !
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| | Re: Strange BrickOS Timing
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Hi Gunther, (...) have (...) After some investigation I found this page on YOUR site: (URL) YOU state: Using Lepomux requires a stable timing on the motor port because it is used as a serial data port. Since brickOS does a lot of stuff (...) (22 years ago, 3-Dec-03, to lugnet.robotics.rcx.legos)
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| | Re: Strange BrickOS Timing
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Hi Gunther, (...) have (...) I'm NOT really an expert in brickOS, but these are the sources of delay and msleep: void delay(unsigned ms) { unsigned i; while (ms-- > 0) for (i = 0; i < 600; i++) // not well calibrated. ; } //! delay execution (...) (22 years ago, 3-Dec-03, to lugnet.robotics.rcx.legos)
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| | Re: an idea, can someone tell me if this is possible/been done before/etc?
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i regret i wrote my previous post here it will never happend again jim plays unfair but this is not proper forum to talk about that sorry to all eot !!! pixel (22 years ago, 3-Dec-03, to lugnet.robotics)
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| | Re: an idea, can someone tell me if this is possible/been done before/etc?
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(...) Roger doger on that. I understand that C. Elegins (sp?) is the current top project goal for this sort of stuff. Something like 10,000 neurons. -- -- Open Forge, LLC 24/365 Onsite Support for PCs, Networks, & Game Consoles 512-695-4126 (Austin, (...) (22 years ago, 3-Dec-03, to lugnet.robotics)
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| | Re: an idea, can someone tell me if this is possible/been done before/etc?
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(...) There's no fault involved from my perspective. The idea is to have fun. You can't do that without some sort of risk (at least I've never experienced 'fun' without some risk). The problem comes when people mix emotion/ego with curiosity. Very (...) (22 years ago, 3-Dec-03, to lugnet.robotics)
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| | Re: an idea, can someone tell me if this is possible/been done before/etc?
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Ah, I do suspect that my data was a little out of date. However the information I see ((URL) Word ".doc" file, or (URL) ) list the housefly at 10^5 or 100,000, to 10^6 or 1 million neurons. This is a little bigger than "400 neurons." In fact the (...) (22 years ago, 3-Dec-03, to lugnet.robotics)
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| | Re: an idea, can someone tell me if this is possible/been done before/etc?
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(...) That was true 20 years ago. A housefly's brain contains just 400 neurons. Your PC can easily simulate a 400 neuron neural network at faster update rates than biological neurons. The problem isn't the raw computational power. ---...--- Steve (...) (22 years ago, 3-Dec-03, to lugnet.robotics)
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| | Re: an idea, can someone tell me if this is possible/been done before/etc?
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(...) True. (...) I was just picking on you since you've spent your day publicly humiliating people (dripping with sarcasm :^) I have plenty of silly and/or stupid ideas..... Some of them lead to really great ideas. (...) No doubt. Flaws are a (...) (22 years ago, 3-Dec-03, to lugnet.robotics)
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| | Re: NQC's future
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I would like functions to be able to return something other than zero. (If there's a way to do this (other than global variables) already, please let me know!) (...) (22 years ago, 3-Dec-03, to lugnet.robotics.rcx.nqc, lugnet.robotics.spybotics)
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| | Re: an idea, can someone tell me if this is possible/been done before/etc?
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(...) Symmetry is when something 'balances', it's a kind of equilibrium. Let's look at a six legged walker for a moment and see what sort of symmetry it has. First off we have six legs and many of them (at least three in the right location) must (...) (22 years ago, 3-Dec-03, to lugnet.robotics)
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| | Strange BrickOS Timing
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Hello out there, maybe someone can explain to me why the current brickOS release seems to have msleep()-amnesia ;-) We've been testing the data transfer to our Lepomux device. For some strange reason we were still using kernel 0.2.6.07nmChg with a (...) (22 years ago, 2-Dec-03, to lugnet.robotics.rcx.legos)
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| | Re: an idea, can someone tell me if this is possible/been done before/etc?
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(...) hard. (...) About 15 years ago - in the days before RCX - I built a 6-legged walker that used "ackerman" steering on the front legs. Power to the front legs went through the kingpins. (I think "kingpin" is called something different in US (...) (22 years ago, 2-Dec-03, to lugnet.robotics)
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| | Re: GP2D12 Please help
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Hi Sebastian, (...) I don't know the schematics of that sensor interface, but I think it's basically a bad idea to drive a device that needs 30 to 50 mA from a powersource that can only output about 10 mA. I've experienced similar effects while (...) (22 years ago, 2-Dec-03, to lugnet.robotics.rcx.legos)
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| | Re: an idea, can someone tell me if this is possible/been done before/etc?
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(...) Done. -- -- Open Forge, LLC 24/365 Onsite Support for PCs, Networks, & Game Consoles 512-695-4126 (Austin, Tx.) help@open-forge.com irc.open-forge.com Hangar 18 Open Source Distributed Computing Using Plan 9 & Linux 512-451-7087 (URL) (...) (22 years ago, 2-Dec-03, to lugnet.robotics)
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