 | | Johnny 5
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Hello Everyone: Does anyone have or know where I can get the plans to build a Johnny 5 type robot? Dan has plenty of pics on his site but no build plans.I have been searching for days on the web with no luck. Being an old timer I simply do not have (...) (19 years ago, 8-Sep-06, to lugnet.robotics)
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| | Re: inverted pendulum
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(...) There are a few nice updates. (19 years ago, 7-Sep-06, to lugnet.robotics)
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| | Re: GBC at BrickFest 2006
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(...) That's the method I used on my own ball counter. During testing, I fed it with (counted) hundreds of balls, it never missed (or over counted) one. During LW2005 it counted about 15000 balls a day during a week... some wear now but still (...) (19 years ago, 7-Sep-06, to lugnet.robotics)
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| | Keynote speaker
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Hi all, I'm part of the organising committee on a conference all about social interactions between humans and artificial creatures and we're looking for potential keynote speakers we might invite. I suggested to the others as a possible, a 'Lego (...) (19 years ago, 7-Sep-06, to lugnet.robotics)
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| | Re: NXT Ultrasonic sensor / Retreiving 8 OBjects at Once
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(...) (URL) Hansen (19 years ago, 7-Sep-06, to lugnet.robotics)
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| | Re: GBC at BrickFest 2006
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(...) LOL!! That may be an idea for next year. To come up with a mindstorms concept/competition that appeals to the other gender as well...maybe Bunnie or our significant others can come up with it! Dave (19 years ago, 7-Sep-06, to lugnet.robotics)
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| | Re: GBC at BrickFest 2006
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(...) I raised this issue in June when discussing GBC reliability, seeing that 1 bps implies a measured time interval. Of course, what is the interval?, I asked. The general consensus is that it is a 30 second time interval. As such, the worst you (...) (19 years ago, 7-Sep-06, to lugnet.robotics)
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| | Re: NXT Ultrasonic sensor / Retreiving 8 OBjects at Once
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This here: (...) Is exactly what I want to do! Do you have any links? If any of your friends have any of their work online I'd love to check it out.. Thanks! Ben (19 years ago, 6-Sep-06, to lugnet.robotics)
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| | RE: NXT Ultrasonic sensor / Retreiving 8 OBjects at Once
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(...) Unfortunately, you cannot operate a ultrasound sensor at this rate. I think it is much slower than this. Before you start a new "ping" you have to ensure that all the echoes from distant devices on first ping have been received before starting (...) (19 years ago, 6-Sep-06, to lugnet.robotics)
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| | Re: NXT Ultrasonic sensor
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(...) Yeah the speed of light is pretty darn fast! Sound is quite turtle-like in comparison ;) Ben (19 years ago, 6-Sep-06, to lugnet.robotics)
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| | Re: GBC at BrickFest 2006
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(...) You're correct, I was streaming it from Google which was probably the issue. (...) It doesn't matter how much quicker than the standard a single module is - if it only gets 1 bps, then it can only pass them to the downstream module at 1 bps... (...) (19 years ago, 6-Sep-06, to lugnet.robotics)
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| | Re: GBC at BrickFest 2006
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(...) I downloaded it completely and don't see any jerkiness, maybe that was due to streaming it as the bandwidth from Google was a bit low (< 100kB/s). (...) But then it may need to accept a lot of balls, if the other modules are quicker. I know (...) (19 years ago, 6-Sep-06, to lugnet.robotics)
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| | Re: NXT Ultrasonic sensor
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(...) It never ceases to amaze me how astoundingly slow sound is compared to the speed of a computer. It's one of those rare cases when your view of the universe around you shifts into a completely new perspective. (19 years ago, 6-Sep-06, to lugnet.robotics)
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| | Re: GBC at BrickFest 2006
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(...) There are actually three ways to approach this: 1) Using something reflective on the far side of the ball chute - have the sensors light bounce back into the sensor - so the reading decreases when something gets in the way of the reflected (...) (19 years ago, 6-Sep-06, to lugnet.robotics)
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| | Re: NXT Ultrasonic sensor
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Hi, (...) since sound travels at about 333 m/s (depending on temperature and pressure), a meter takes 3 milliseconds. At the maximum range of 2.5 meters, times two that would be 15 milliseconds per reading. Cheers Jürgen (19 years ago, 6-Sep-06, to lugnet.robotics)
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| | Re: GBC at BrickFest 2006
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(...) I found a yellow LEGO rubber band on the TECHNIC table, so I took it home with me since most everyone was gone by that point. That's probably not a big deal, unlike an entire train regulator. :( (19 years ago, 6-Sep-06, to lugnet.robotics)
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| | Re: GBC at BrickFest 2006
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(...) Now that is a nice solution, and not one I'd thought of. Not having the silver brick, I could still use a (non-LEGO! Aaah!) solution of a small pice of reflective tabe or something. Cool. (...) I know that there's one power transformer that is (...) (19 years ago, 6-Sep-06, to lugnet.robotics)
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| | Re: GBC at BrickFest 2006
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(...) I had success with a ball detector using only one light sensor in my little interactive get-the-ball-in-the-hole module. If the ball went into the hole, it rolled past a light sensor (old RCX version; is there a new nxt one?). Across from the (...) (19 years ago, 6-Sep-06, to lugnet.robotics)
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| | Re: GBC at BrickFest 2006
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(...) Yeah, that's suspiciously absent from my video. I'm uploading another one now: (URL) Google version is really jerky I'm afraid.) This one starts with the train being loaded, but then follows the train to the next unloading module so you can (...) (19 years ago, 6-Sep-06, to lugnet.robotics)
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| | Re: NXT Ultrasonic sensor
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(...) PS - the thing I would want the radar to do is to guide a bucket for an excavator. The goal being to dig lego bricks from a pile with the bucket. So I think I can get away with it not being super-accurate or resolute. I'm really looking (...) (19 years ago, 6-Sep-06, to lugnet.robotics)
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