 | | Re: CAN you believe it... The next Robotics game.
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In lugnet.org.ca.rtltoronto, Jeff Van Winden wrote: <snip> (...) I still ahve the playfield walls that can be easily set up anywhere on top of a smooth floor. that'd give us an 8x8 arena with white walls--if the cans are darker, a light sensor may (...) (17 years ago, 11-Jan-08, to lugnet.org.ca.rtltoronto, lugnet.robotics, lugnet.org.ca.obb)
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| | Re: CAN you believe it... The next Robotics game.
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(...) The Focus is finding the Heavist can, I think part of the challenge will be finding the cans in general... I imagined a 3 meter by 3 meter (just for you Iian) Practically 10' x 10' for you imperial lovers out there. With maybe 20 - 30 Cans. (...) (17 years ago, 11-Jan-08, to lugnet.org.ca.rtltoronto, lugnet.robotics, lugnet.org.ca.obb)
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| | Re: CAN you believe it... The next Robotics game.
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Nice one Jeff- Question on the "can density", which will of course depend on the playfield size and the # cans on the field.. If the focus on finding cans, or finding the largest cans? If the later, I might suggest wrapping the bottom of each can (...) (17 years ago, 11-Jan-08, to lugnet.org.ca.rtltoronto, lugnet.robotics, lugnet.org.ca.obb)
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| | Re: CAN you believe it... The next Robotics game.
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(...) Forgot one thing... Time Frame for the Game: How does late March, Early April sound for everyone?? Jeff VW (17 years ago, 11-Jan-08, to lugnet.org.ca.rtltoronto, lugnet.robotics, lugnet.org.ca.obb)
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| | CAN you believe it... The next Robotics game.
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Ok, so I meant to do this months ago, and I have just been swamped.. So with out further ado, here are my thoughts on our next game: ***...***The Can Game***...*** Premise of the Game: Build a robot that can find the heaviest can in the play field. (...) (17 years ago, 11-Jan-08, to lugnet.org.ca.rtltoronto, lugnet.robotics, lugnet.org.ca.obb)
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| | Re: Cleaning Battery Terminals
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In lugnet.robotics, Mark Riley wrote: <snip> (...) Ooooh... wireless remotes! Nice! Throw it at me and I'll test it when ready :) Dave K (17 years ago, 10-Jan-08, to lugnet.robotics, lugnet.trains)
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| | Re: Cleaning Battery Terminals
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(...) I just finished a second RCX and while the terminals aren't as shiny as the previous RCX, the RCX fired right up after I reassembled it. The crud on this latest RCX's terminals was bluish green so I suspect the outer silver layer got eaten (...) (17 years ago, 9-Jan-08, to lugnet.robotics, lugnet.trains)
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| | Re: Cleaning Battery Terminals
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In lugnet.robotics, Mark Riley wrote: <snip> (...) That's good news! I'm going to try this soon on some of my 4.5/9 volt battery boxes. As far as I can see, the vinegar won't harm the plastic yet should do a good number on the corroded contacts. (...) (17 years ago, 9-Jan-08, to lugnet.robotics)
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| | Cleaning Battery Terminals
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I haven't posted here in a while, my RCXs having been on a hiatus. Well, after breaking them out again, I discovered that I had foolishly left alkaline batteries in some of them and of course some of the batteries had started to leak. This caused (...) (17 years ago, 9-Jan-08, to lugnet.robotics)
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| | The Unofficial LEGO MINDSTORMS NXT Inventor's Guide
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I'm having a book signing this month for my new book The Unofficial LEGO MINDSTORMS NXT Inventor's Guide (No Starch Press), and I decided to officially announce the book here on LUGNET and invite everyone who lives in the Round Rock, Texas area to (...) (17 years ago, 4-Jan-08, to lugnet.announce, lugnet.robotics, lugnet.robotics.nxt, lugnet.events, lugnet.loc.us.tx, FTX) !
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| | NXT iterate files
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I wrote some NXC code that runs on the enhanced NBC/NXC firmware. It demonstrates how to iterate files on the filesystem. Let me know if you have any questions. John Hansen #define LOADER_HANDLE(_x) (_x&0xff) #define LOADER_ERR_BYTE(_x) (...) (17 years ago, 30-Dec-07, to lugnet.robotics.nxt, lugnet.robotics)
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| | Re: NXT Program: How to avoid stop-and-go? (US-Sensor Test Values)
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I tried to use a program to log the distance while the US-sensor is moving forward. Unfortunately, it doesn't go straight all the time. So, I simply display the US value and put the vehicle in different position manually. Here are my test values for (...) (17 years ago, 27-Dec-07, to lugnet.robotics)
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| | Individual Power-Functions elements now available
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Individual Power-Functions elements now available on H@H: battery box, both motor types, IR receiver and transmitter, and a Power-Function to 9V converter cable. Listed as shipping later in January. (17 years ago, 26-Dec-07, to lugnet.technic, lugnet.robotics)
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| | Re: NXT Program: How to avoid stop-and-go? (US-Sensor in angle)
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(...) That is a very interesting site, with some interesting information... but you might like to do those experiments yourself. For instance, the odd "ledge" in their data at 48 cm is not a feature with my US sensors - they may have been working (...) (17 years ago, 25-Dec-07, to lugnet.robotics)
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| | Re: NXC: How to read the distance of US-sensor?
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I found a piece of codes in a forum: (URL) guess I can assume it's returning cm. (...) (17 years ago, 24-Dec-07, to lugnet.robotics)
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| | NXC: How to read the distance of US-sensor?
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I'm new in NXC. In the NXC-guide, I found SensorUS() returning a value from US-sensor. But in the LEGO software I can select inch/cm. Questions: What value is it returning, inch or cm? Can I set it to inch or cm? thanks Phuoc Can HUA (17 years ago, 24-Dec-07, to lugnet.robotics)
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| | Re: NXT Program: How to avoid stop-and-go? (US-Sensor in angle)
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(...) (17 years ago, 24-Dec-07, to lugnet.robotics)
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| | Re: NXT Program: How to avoid stop-and-go? (US-Sensor in angle)
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Strangely, it slows down, i.e. it detects the further distance (less reflection?) in the same angle. I tried to put the US-sensor vertically. It still shows the same effect. I also notice the closer it comes the larger angle it needs to get a (...) (17 years ago, 23-Dec-07, to lugnet.robotics)
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| | Re: NXT Program: How to avoid stop-and-go? (US-Sensor in angle)
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(...) At a glancing angle (not approaching the wall "head on" at 90°, but at an angle) very little sound energy will be reflected back towards the sensor. If there isn't enough energy reflected back for the sensor to "hear" the echo, it won't detect (...) (17 years ago, 22-Dec-07, to lugnet.robotics)
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| | Re: NXT Program: How to avoid stop-and-go? (US-Sensor in angle)
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Brian, It works fantastic. Thanks. Now I've put 2 US Wait blocks. The 1st one to slow down for < 30cm and the 2nd one to turn for < 20cm. This works pretty well when the vehicle runs ~90 degree toward the wall. But when the angle is flat it only (...) (17 years ago, 22-Dec-07, to lugnet.robotics)
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