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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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| | Re: NXT Ultrasonic sensor
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(...) Well it sounds promising, I'm going to try it. I really appreciate your input. -Ben (19 years ago, 6-Sep-06, to lugnet.robotics)
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| | Re: NXT Ultrasonic sensor
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(...) Well, sort of. First, what the US sensor returns is the range of the nearest sound-reflecting surface: but it's not a pencil thin laser beam of sound, so the same object might be detected at slightly different angles, making the object apeear (...) (19 years ago, 6-Sep-06, to lugnet.robotics)
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| | Re: GBC at BrickFest 2006
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(...) Actually, my counter was mechanical, in that each ball temporarily opened a normally closed touch sensor, and the RCX was just counting touches. For an optical one, you can use a ball breaking a lightbeam (two light sensors pointed at each (...) (19 years ago, 6-Sep-06, to lugnet.robotics)
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| | NXT Ultrasonic sensor
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I haven't bought an NXT yet and I have a question about the ultrasonic sensor it comes with. Can I use it to take a bunch of readings and then use them assemble up a 3D picture of what is around the sensor, kind of like how a radar works? How long (...) (19 years ago, 6-Sep-06, to lugnet.robotics)
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| | Re: GBC at BrickFest 2006
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(...) That got me thinking...we had a few ball counters going: Rafe's impressive digital counter, Greg's analog one, and Brian's optical one in the "penalty box" with all of my modules (heh heh). My question is this: is there agreement on what the (...) (19 years ago, 5-Sep-06, to lugnet.robotics)
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| | Re: GBC at BrickFest 2006
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Hi Brian, hi everybody, (...) I'd like to suggest to use e.g. Google Video instead of YouTube, as long YouTube requires Flash to view the videos. Google Video allows to download the videos in their native format, so it is usable with free players (...) (19 years ago, 5-Sep-06, to lugnet.technic, lugnet.robotics, lugnet.events.brickfest)
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| | Re: GBC at BrickFest 2006
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(...) It was quite an impressive array of modules. I wonder where the trains got emptied, and if there ever was an overflow in some module, given the enormous number of balls? Cheers Jürgen (19 years ago, 5-Sep-06, to lugnet.robotics)
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| | Re: GBC at BrickFest 2006
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(...) I have a GBC video on YouTube...search for "Brickworkz" - (it's currently being processed so I don't have a URL yet) Unfortunately some of the devices weren't working when I came by. (...) I also posted (URL) footage of Droidy>. Enjoy! Folks, (...) (19 years ago, 5-Sep-06, to lugnet.technic, lugnet.robotics, lugnet.events.brickfest, FTX)
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| | Re: GBC at BrickFest 2006
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(...) Done. (URL) Brian Davis (19 years ago, 3-Sep-06, to lugnet.robotics)
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| | Re: GBC at BrickFest 2006
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Hi Brian, (...) how about Google Video? Jürgen (19 years ago, 3-Sep-06, to lugnet.robotics)
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