 | | 68HC11S IN THE UK
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Hi everyone.. Okay, today's million dollar (or pounds actually!) question is ... WHERE THE HECK CAN I GET 68HC11's (A1) from in the United Kingdom?? Any suggestions would be much appreciated. Thanks -Dave [daveh@liteon.co.uk OR (...) (27 years ago, 3-Mar-98, to lugnet.robotics.handyboard)
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| | Re: Sonar Multiplexor Question
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Ed, I don't understand your response, but it sounds interesting. Can you elucidate? Stephen stephen.michael@mci.com (...) (27 years ago, 3-Mar-98, to lugnet.robotics.handyboard)
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| | Re: Sonar Multiplexor Question
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My $0.02 Transducers poled in sequence can us a count to four (or more) circuit/chip. One digital output can be used to advance the count. (...) ---...--- Ed Spike (27 years ago, 3-Mar-98, to lugnet.robotics.handyboard)
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| | Several different questions
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Hello everybody, I'm a new owner of the handy board and I have sereval problems to use the outputs and, as I'm new on the mailing list, I may ask questions already asked before or stupid questions so I apologize in advance. Today, I have several (...) (27 years ago, 3-Mar-98, to lugnet.robotics.handyboard)
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| | Re: V2X Compass
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Bill, I have not been able to try that with the v2x onboard the bot so far, every time I try to load anything while the v2x is running my handyboard wants to crash. Someone out there must have a code that they would be willing to share with some of (...) (27 years ago, 3-Mar-98, to lugnet.robotics.handyboard)
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| | Re: Sonar Multiplexor Question
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You get 4 SPI output digital ports in the HB. Read the section in the FAQ about the HB's digital outputs. These 4 can be used to select your transducer. You can pull one motor driver chip and get 2 more digital outputs. Kent has routines that uses (...) (27 years ago, 3-Mar-98, to lugnet.robotics.handyboard)
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| | Re: Sonar Multiplexor Question
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(...) I notice that Adam's circuit uses all 4 available SCI outputs to select the transducer, but the sonar board itself requires two of them already. Why not just get a 2-to-4 line demultiplexor, and use the remaining 2 SCI outputs to select the (...) (27 years ago, 2-Mar-98, to lugnet.robotics.handyboard)
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| | Re: Sonar Multiplexor Question
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(...) Ive never done this before, but couldnt you do this? Buy a multiplexer that will take 2 outputs and multiplex it to 4 outputs, since you will only be driving one at a time. To each individual output of the multiplex, wire the power to one (...) (27 years ago, 2-Mar-98, to lugnet.robotics.handyboard)
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| | Sonar Multiplexor Question
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To anyone on the list: I would like to drive 3-4 transducers from a single Polaroid sonar ranging unit. Adam Cox posted a circuit for doing this on the HandyBoard page -- I have a few questions regarding this and possible alternative solutions. Has (...) (27 years ago, 2-Mar-98, to lugnet.robotics.handyboard)
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| | Re: V2X Compass
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I have a question for you, how much does the compass deviate when the motors turn on. As an ex-sailor, one of the major consideration in using magnetic compasses is deviation, and on a small bot, the deviation would vary due to the changing (...) (27 years ago, 2-Mar-98, to lugnet.robotics.handyboard)
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| | IR sensor
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I am having troubles getting my ir sensor to work I did everything that is said in the technical reference and when I try to retrieve the data all I get is 255 the first time and 0 all the other times. I tried to deactivate it then activate it and (...) (27 years ago, 2-Mar-98, to lugnet.robotics.handyboard)
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| | Re: downloaded
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Hi German, I'm not sure why this message got re-forwarded to the handyboard mailing list. I was cc'd on the key that our order department e-mailed to you last week; if you still have not received it please let me know. We appreciate everyone's (...) (27 years ago, 2-Mar-98, to lugnet.robotics.handyboard)
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| | Polaroid sonar module connector
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Does anyone know where I can buy a couple of the sockets that are designed to accomodate the flat cable from the Polaroid sonar modules? Thanks. --Will , , __@_/ \_@__ |/ | /__, o @_/ )\ ) ( \ (\/\\, ~~~...~~~ ' ` ~~~...~~~ ` ~~~...~~~ Wendy Parson, (...) (27 years ago, 2-Mar-98, to lugnet.robotics.handyboard)
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| | Re: ir sensor
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(...) said in the technical reference and when I try to retrieve the data all I get is 255 the first time and 0 all the other times. I tried to deactivate it then activate it and retrieve the data but I still get 255 when I press a different button (...) (27 years ago, 2-Mar-98, to lugnet.robotics.handyboard)
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| | Re: ir sensor
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(...) Make sure you don't have any bright light shining down on your board. Too much light saturates the sensor and you get 0 or 255 all the time. I thought my IR port was bust for a long time until I turned off my desk lamp one day. I hope your (...) (27 years ago, 2-Mar-98, to lugnet.robotics.handyboard)
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| | ir sensor
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I am having troubles getting my ir sensor to work I did everything that is said in the technical reference and when I try to retrieve the data all I get is 255 the first time and 0 all the other times. I tried to deactivate it then activate it and (...) (27 years ago, 2-Mar-98, to lugnet.robotics.handyboard)
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| | Re: SPI?
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Thanks for all the info guys :) Clancy (27 years ago, 1-Mar-98, to lugnet.robotics.handyboard)
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| | SPI?
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What is the SPI part of the handyboard an what dos SPI stand for. pardon my ignorance (27 years ago, 28-Feb-98, to lugnet.robotics.handyboard)
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| | Re: V2X Compass
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John, My v2x has these numbers on the cpu 6448 PN11096 V2XC JJJ I have a handyboard , a v2x compass and small robot platform with left and right steering motors. Everything works, I can run the motors,load compass.icb and compass.c and the lcd will (...) (27 years ago, 28-Feb-98, to lugnet.robotics.handyboard)
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| | RE: downloaded
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(...) President (URL) (27 years ago, 28-Feb-98, to lugnet.robotics.handyboard)
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| | RE: V2X Compass
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I didn't actually buy the clock, the company that I work for was scrapping a load of stuff from one of it's buildings and these clocks were some of it. The company said if we gave 2 pounds to charity we could have a clock. They have been very (...) (27 years ago, 27-Feb-98, to lugnet.robotics.handyboard)
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| | Help for problems with Polaroid 6500 sonar board
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Hi all if anyone has problems using the 6500 series for distances below 35cm by using the binh signal I have a possible solution to the problem. We also expierienced problems using the sensors for distances between 15cm and 40cm. We finally found (...) (27 years ago, 27-Feb-98, to lugnet.robotics.handyboard)
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| | Re: Sonar questions (technical ones!)
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(...) Yes! I have been working from your sonar page, but as a sanity check I checked the Polaroid sheet again. Whoops! At least we were both tripped up by it. I'm used to seeing the "speed of sound" (ft/ms) quoted, not the "slowness of sound" (...) (27 years ago, 26-Feb-98, to lugnet.robotics.handyboard)
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| | Re: Sonar questions (technical ones!)
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Good questions!! (...) The polaroid number/widely quoted number is 0.9 MILLISECONDS PER FOOT -- or 1.11 ft/ms. hence the conversion matches! I think also I have this wrong on my HB sonar page! This confused me for a while too. (...) Yes, this is (...) (27 years ago, 26-Feb-98, to lugnet.robotics.handyboard)
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| | Re: Sonar for cheap
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... still a good book though- I recommend it highly :) (27 years ago, 26-Feb-98, to lugnet.robotics.handyboard)
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| | Re: Sonar for cheap
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(...) parts should be under $10.00. Has anyone tried this circuit? Yeah, it doesn't work :) That's why I designed my circuit in the first place. I tore my hair out for a couple of weeks trying to figure out what I was doing wrong. I finally realized (...) (27 years ago, 26-Feb-98, to lugnet.robotics.handyboard)
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| | thanks
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Thansk for the quick reply, everyone! phil (27 years ago, 26-Feb-98, to lugnet.robotics.handyboard)
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| | Re: Sonar for cheap
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That was probably my web page, the URL changed (my provider's doing) so its now (URL) (which I don't mind as that's my domain, but it confused the hell out of millions :) The old URL (which is no longer) was: (URL) (27 years ago, 26-Feb-98, to lugnet.robotics.handyboard)
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| | Re: Sonar for cheap
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Also. The Robot Builders Bonanza has a similar circuit. The price for the parts should be under $10.00. Has anyone tried this circuit? (...) information (...) site (...) ___...___ ___...___ Jonathan Swaby 305 Sparks Bldg Computer Support Specialist (...) (27 years ago, 26-Feb-98, to lugnet.robotics.handyboard)
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| | Re: Sonar for cheap
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(...) Yep, check out: (URL) Mike Vande Weghe (27 years ago, 26-Feb-98, to lugnet.robotics.handyboard)
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| | Sonar for cheap
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A long time ago, someone had posted a link to a website that had information on how to make a sonar sensor pair for $10. Does anyone know where that site is? It must have been about 10-12 months ago. thanks! phil thehahns@nconnect.net (27 years ago, 26-Feb-98, to lugnet.robotics.handyboard)
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| | V2X Compass
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I have recently obtained a digital compass circuit as part of a clock (it lights an led that points north) but haven't yet tried to interface with it. I think it will be communicating via SPI but I'm not sure. The question I want to ask anybody with (...) (27 years ago, 26-Feb-98, to lugnet.robotics.handyboard)
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| | Serial problems
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Hello, I am trying to get my handyboard working after it has been in a box for a long time. It used to work flawlessly but now I am having trouble downloading the pcode. I did all of the checks for the serial/charger board in the assembly (...) (27 years ago, 26-Feb-98, to lugnet.robotics.handyboard)
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| | Re: Sonar questions (technical ones!)
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My sonar seems to be pretty accurate. I would notice a 25% difference. ??? Check your calculations. Maybe you missed something. ---...--- ericson mar Master of Engineering Candidate Project: Mobile Robotics mar@cooper.edu (212)353-4356 Department of (...) (27 years ago, 26-Feb-98, to lugnet.robotics.handyboard)
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| | Sonar questions (technical ones!)
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Hello everyone, A few sonar questions (other than where to buy them): 1: The speed of sound has been widely quoted to be 0.9 ft/ms (274m/s), but my Physics text lists it as 343 m/s (at 20C/70F), which is about 1.13 ft/ms, or 25% faster. So why the (...) (27 years ago, 25-Feb-98, to lugnet.robotics.handyboard)
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| | Re: Sonar kits (jluijk, willbain,)
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(...) At the bottom of the following page are a couple links to vendors: (URL) page is on the Handy Board site; hit the Software link, then Libraries, then follow the Polaroid sonar link.) In addition, the Robot Store in California sells 'em, but (...) (27 years ago, 25-Feb-98, to lugnet.robotics.handyboard)
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| | Re: Sonar kits
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(...) I would recommend buying the one transducer and module for $50. The extra circuit that you would get with the designer's kit is totally unnecessary if you have the Handy Board already. You only save a few dollars by buying more than one unit, (...) (27 years ago, 24-Feb-98, to lugnet.robotics.handyboard)
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| | IR connections
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Hi!. I´m trying to connect a IR emitter/receiver boar (Rur Warrior scheme) . I´m going to convert SPI pins in two digital outputs. Can I use the sony receiver?. Can I read this input?. Where?. Is it better connect another IR receiver in an analog (...) (27 years ago, 23-Feb-98, to lugnet.robotics.handyboard)
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| | UNSUBSCRIBE
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Can you unsubscribe me please: My address is chauhan@csee.usf.edu Regards Sonam (...) - Sonam Chauhan ---...--- WWW Homepage: (URL) sonam@acm.org Phone: (1-813) 6151435 ---...--- (27 years ago, 23-Feb-98, to lugnet.robotics.handyboard)
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| | Sonar
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Hi WW, is your sonar a Polaroid 6500 series or something else ? Where did you get it ? What did you pay for it ? Thanks, Jan (Giovanni). (27 years ago, 23-Feb-98, to lugnet.robotics.handyboard)
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| | Sonar kits
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Hallo, I am thinking about buying one of these things: Designer's Kit: 1 transducer, 1 ranging module, electronics display accurate to 1/10th meter. Cost is $169 OEM kit: 2 transducers, 2 ranging modules. $99. or: #01, Transducer and Sonar Module (...) (27 years ago, 23-Feb-98, to lugnet.robotics.handyboard)
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| | Add me
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Hi from Paris, please add me to the Handy Board mailing list. e-mail : gab@biomath.jussieu.fr Thanks :-) (27 years ago, 23-Feb-98, to lugnet.robotics.handyboard)
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| | HOW TO UNSUBSCRIBE
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1. Please *DO NOT* send unsubscribe messages to the handy board mailing list. 2. Instead, send unsubscribe messages to Fred Martin, fredm@media.mit.edu. 3. The only person who can unsubscribe you is Fred Martin, fredm@media.mit.edu. 4. Thank you. (...) (27 years ago, 23-Feb-98, to lugnet.robotics.handyboard)
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| | unsubscribe
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Hi Please unsubscribe me from this list regards Rina (27 years ago, 23-Feb-98, to lugnet.robotics.handyboard)
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| | Please unsubscribe
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Hi Please unsubscribe me from this list regards Bruce (27 years ago, 23-Feb-98, to lugnet.robotics.handyboard)
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| | Re: RJ11 cable
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please see the FAQ on this, look for the entry on "help my interface board is smoking and R11 is turning black!" (that's what happens if you get it wrong) fred (...) (27 years ago, 22-Feb-98, to lugnet.robotics.handyboard)
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| | Re: IC 3.2 announcement
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On a related note ... Sometime ago, someone(???) mentioned that he would attempt to build the new motor routines into IC3.1. Would this by any chance be already in IC3.2? Jun Nolasco nolasco@inx.net (...) (27 years ago, 21-Feb-98, to lugnet.robotics.handyboard)
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| | Ordering IC
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Dear Laurent and German, I wish to publicly apologize for Newton Lab's slowness of response to your messages of last fall. You should know that the employee in charge of handling IC sales and support during that time is no longer with the company. (...) (27 years ago, 20-Feb-98, to lugnet.robotics.handyboard)
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| | IC 3.2 announcement
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After seeing some of the recent e-mail to this list, I realize that we should send out the following announcement to the Handyboard list. IC 3.2 for Windows fixes the problems that a percentage of folks reported about pcode download problems. (...) (27 years ago, 20-Feb-98, to lugnet.robotics.handyboard)
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| | Re: downloaded
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(...) Laurent -- just to be clear -- your problem is that you can't bootstrap your board from a G3 Mac, but after you do get it booted, everything's OK? Fred (27 years ago, 20-Feb-98, to lugnet.robotics.handyboard)
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| | RE: downloaded
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I have the same problem too. I sent thousands of e-mail to newton labs without any answer. Could someone help ? Thanks. (...) (27 years ago, 20-Feb-98, to lugnet.robotics.handyboard)
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| | Expansion board test code
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Duncan, The expansion board test code you sent worked quite well, It was very useful in testing and trouble shooting my expansion board. Thanks, Clancy (27 years ago, 19-Feb-98, to lugnet.robotics.handyboard)
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| | downloaded
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Finaly I have got to download pcload in my HB!!!! You are rigth, I´ve load in a Macintosh CI. Now with IC system in the board, I can work in my Mac G3. ?:-( . Fred, thanks for all. I am trying to buy the key password for IC 3.1, but is impossible, (...) (27 years ago, 19-Feb-98, to lugnet.robotics.handyboard)
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| | Download troubles
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Hello I´m a beginner. I have problems download pccode in my HB. I´ve a Mac G3 and I use Init board HB 7.2 modem & 6811 Downloader. I,ve check connections, batteries and the board is in download mode. Bat/pwr LEDs light on (1/3 second) and turn off. (...) (27 years ago, 19-Feb-98, to lugnet.robotics.handyboard)
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| | IR receiver hookup
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Hi all, What is the procedure for hooking up the Radio Shack GP1U52X IR receiver to the digital inputs of the Handyboard?, do I need a transistor between the units output an the HBs digital input?. Thanks, Clancy. (27 years ago, 19-Feb-98, to lugnet.robotics.handyboard)
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| | RE: Expanding the memory of the handyboard
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We used OEM barcode reader (IS4120-41 scanner decode engine) from Metrologic Instruments, Inc.. The output of this reader is the barcode ASCII format transmitted across an RS232 line. We read this with the handy board's RS232 serial port. You can (...) (27 years ago, 19-Feb-98, to lugnet.robotics.handyboard)
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| | Re: Expanding the memory of the handyboard
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(...) How did the board read the barcode label? What equipment/algorithm was used? I've been screwing around with a train, and haven't really had any luck with reading a barcode from the track as it passes over. --- Chris Osborn FozzTexx Enterprises (...) (27 years ago, 18-Feb-98, to lugnet.robotics.handyboard)
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| | Thanks Fred et al...
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My first scratch-built HamdyBoard has passed all of it's tests and is up and running. I've only been looking for something like this for about twelve years, so I'm REAL happy. I especially appreciate the emphasis on both hardware and software (...) (27 years ago, 18-Feb-98, to lugnet.robotics.handyboard)
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| | Pulsewidth Functions
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Does anyone know if you need IC 3.x to run the pulsewidth measuring functions provided by Thomas Hauri?? Joshua Stark j-stark@uiuc.edu Aspiring Computer Engineering Major (27 years ago, 18-Feb-98, to lugnet.robotics.handyboard)
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| | (no subject)
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assuming the battery is not yet connected (which would be the case of you're building the HB and following the directions), the charge LED means that the HB is drawing some current. fred In your message you said: (...) (27 years ago, 17-Feb-98, to lugnet.robotics.handyboard)
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| | (no subject)
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I'm just wondering, is the "charge" LED supposed to come on on the I/C board when you're running code on the Handy-Board? I don't think it should, but I'm not sure. Thanks, Rob O' Neill (27 years ago, 17-Feb-98, to lugnet.robotics.handyboard)
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| | Re: IC 3.x Reg Code
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Newtonlabs will give you one if you ask them. ic@newtonlabs.com (...) (27 years ago, 17-Feb-98, to lugnet.robotics.handyboard)
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| | 1998 MIT LEGO Robot Design Contest videos on-line
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Hi everyone, Quicktime and RealVideos of this year's contest highlights can be had at (URL) (27 years ago, 17-Feb-98, to lugnet.robotics.handyboard)
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| | IC 3.x Reg Code
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Does anyone have a temp 3 week reg code for IC 3.x that I could use?? Im having problems loading the frequency measuring routinues provided on this mailing list and I believe it might be because I'm still using IC 2.8 and the routines have been (...) (27 years ago, 17-Feb-98, to lugnet.robotics.handyboard)
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| | Re: Lego 9V motors work well?
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(...) The Lego motors are sized such that they can be "pinned" to the frame of a Lego robot easily. With a horizontal beam beneath the motor and another across the top, a pair of six-unit beams can be pinned vertically to the horizontal beams using (...) (27 years ago, 17-Feb-98, to lugnet.robotics.handyboard)
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| | Re: Sonar
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Sure did. I used a ceramic disk capacitor... Hope that was okay to use. I just can't find what the problem is with the ranging board. For all I know, it has never worked. This is my first attempt at using it. There really isn't a whole lot to the (...) (27 years ago, 17-Feb-98, to lugnet.robotics.handyboard)
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| | RE: Expanding the memory of the handyboard
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Dear Fred, The Mechatronics class competition was to build autonomous miniature forklifts that would navigate a complex course. In the course, the forklifts had to identify, pick up, and deliver three. The path that the forklifts had to negotiate (...) (27 years ago, 17-Feb-98, to lugnet.robotics.handyboard)
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| | Re: Lego 9V motors work well?
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I'm curious how you went about securing the motors to your robots. I picked up a couple yesterday, and they do seem to be very good quality motors, but just sticking them on "the LEGO way" doesn't work too well. They keep ripping themselves loose (...) (27 years ago, 17-Feb-98, to lugnet.robotics.handyboard)
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| | Re: Expanding the memory of the handyboard
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Dear Kevin, Please forgive this non-answering of your question, but I am curious as to what kinds of hardware projects/software objectives were your students working on when they ran out of 'hc11 memory, and how did they deal with this circumstance? (...) (27 years ago, 16-Feb-98, to lugnet.robotics.handyboard)
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| | bouncing ball
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Hey! Im a realitivly clueless High school guy. Our Adventures in Supercomputing group is making a mobile robot using a handyboard and 3 or 4 infared sensors. Is tyhe bouncey ball method a good one for having a rover permeate a halled area? the (...) (27 years ago, 16-Feb-98, to lugnet.robotics.handyboard)
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| | Expanding the memory of the handyboard
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A number of students that used the handyboard in our Mechatronics competition needed substantially more memory than the 16,320 bytes currently available. What options are there to add memory to the handyboard? Thanks to everyone who contributes to (...) (27 years ago, 16-Feb-98, to lugnet.robotics.handyboard)
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| | Re: Interrupt for serial data
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I have been using very successfully for two months now, the code in the attached zip file. It has Interrupt Driven Transmit & Receive functions, both are buffered. I found the code easy to adapt for my specific task. Messages can be "Canned", Fixed, (...) (27 years ago, 16-Feb-98, to lugnet.robotics.handyboard)
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| | Re: Interrupt for serial data
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I have been using very successfully for two months now, the code in the attached zip file. It has Interrupt Driven Transmit & Receive functions, both are buffered. I found the code easy to adapt for my specific task. Messages can be "Canned", Fixed, (...) (27 years ago, 16-Feb-98, to lugnet.robotics.handyboard)
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| | Digital input cct
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Hi there, I'm in the middle of building a handyboard and I'm having a lot of problems. I'm on part 7.2 (Digital Input cct) and the testdigitals(); function in hbtest.c doesn't respond to the start button. All the chips and RP1 are installed properly (...) (27 years ago, 16-Feb-98, to lugnet.robotics.handyboard)
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| | Re: pa7 9600 serial output
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(...) You have to re-write the bit_delay loop to take up four times as much time. Just multiply the delay count value by four, e.g., "LDAB #148". Fred (following is the 9600 code.) * take up 0.1042 millisecs * 208 cycles bit_delay LDAB #37 bit_loop (...) (27 years ago, 16-Feb-98, to lugnet.robotics.handyboard)
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| | using the MC34064 LVI
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Hello, This is a warning for anyone considering using the Motorola MC34064 to replace the DS1233. I have just built a couple handyboards and I had some problems getting them working. I finally tracked the problem done to the LVI. I used the MC34064 (...) (27 years ago, 16-Feb-98, to lugnet.robotics.handyboard)
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| | Measuring PW
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Has anyone been able to successfully use Thomas Hauri's PW measuring routines?? For some reason whenever I try to load them they crash my IC. Any thoughts?? Joshua Stark j-stark@uiuc.edu Aspiring Computer Engineering Major (27 years ago, 16-Feb-98, to lugnet.robotics.handyboard)
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| | L293D
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where does the pwm go? ...the "cs" or the "in" pins? ---...--- ericson mar Master of Engineering Candidate Project: Mobile Robotics mar@cooper.edu (212)353-4356 Department of Mechanical Engineering The Cooper Union for the Advancement of Science and (...) (27 years ago, 16-Feb-98, to lugnet.robotics.handyboard)
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| | Speech Synthesizers
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I am wanting to add speech to the Handy Board. I am currently looking at interfacing a SPO256-AL2 speech synthesizer chip and have a very limited schematic that came with the chip many years ago. Does anyone have a nice set of schematics for doing (...) (27 years ago, 16-Feb-98, to lugnet.robotics.handyboard)
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| | Infrared port on the HB is not working: need help!
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hello! I pulled out my HB today and rtied playing around with the IR port. it does not work for some reasons. I checked the remotes: they are still transmitting! Here are the steps I took: am I missing a step? 1. loaded sony-ir.icb 2. sony_init(1); (...) (27 years ago, 15-Feb-98, to lugnet.robotics.handyboard)
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| | pa7 9600 serial output
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Hi, I'm trying to interface the FerretTronics Servo Controller Chip FT639, to the handyboard using PA7. How can i modify the pa7_9600.asm file to transmit at 2400 baud? thanks, phet (27 years ago, 15-Feb-98, to lugnet.robotics.handyboard)
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| | Re: 68HC11 modes
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The handyboard has to stay in special test mode so that it can switch into and out of 'single chip' mode at will. This is necessary to operate the LCD (which uses either a clever or gross hack depending on your taste). If you are writing code using (...) (27 years ago, 14-Feb-98, to lugnet.robotics.handyboard)
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| | RE: encoders
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(...) In my experience, it doesn't matter how slow the pulse is. The count is increased each time the analog port value crosses outside of the middle range defined by the two threshold values as shown below (please note that you'll need to view this (...) (27 years ago, 14-Feb-98, to lugnet.robotics.handyboard)
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| | RE: encoders
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-----Original Message----- From: Will Bain [SMTP:willbain@cs.umt.edu] Sent: Saturday, 14 February 1998 12:50 To: handyboard@media.mit.edu Subject: Re: encoders (...) trouble.When I try to load the file fencoder0.icb I get a message that ic cannot (...) (27 years ago, 14-Feb-98, to lugnet.robotics.handyboard)
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| | Re: encoders
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(...) trouble.When I try to load the file fencoder0.icb I get a message that ic cannot find the file.Any hints? (...) pulse or what dictates how the count is incremented. I think the file is named fencdr0.icb by default (not fencoder.icb). Maybe (...) (27 years ago, 14-Feb-98, to lugnet.robotics.handyboard)
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| | public apology
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Yes -- I didn't think very hard and in retrospect it's fairly evident that Jan-Sipke's code is just the starting step. Sorry for being such a blunderhead. (Jan-Sipke and I have been exchanging some private messages and I think he's closing in on a (...) (27 years ago, 14-Feb-98, to lugnet.robotics.handyboard)
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| | Re: Sonar
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If the diodes are getting hot, it does indicate a short. Fred In your message you said: (...) (27 years ago, 14-Feb-98, to lugnet.robotics.handyboard)
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| | Re: 9v lego motors
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Everyone is complaining about the price of LEGO motors. There is a new product, a gear reduction motor, that is a great value. It is a super efficient DC motor with a built in gearbox that can be used for direct drive, or with one stage of gear (...) (27 years ago, 13-Feb-98, to lugnet.robotics.handyboard)
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| | Re: Interrupt for serial data
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(...) Sipke obviously realizes that more work is needed, and justs want to get to step 1 first by recognizing the interrupt. That is exactly what I would do too. I've been thinking about writing an interrupt-driven serial receive routine too, but (...) (27 years ago, 13-Feb-98, to lugnet.robotics.handyboard)
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| | Re: Interrupt for serial data
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Jan-Sipke, You're really pretty far away from having this work. It's not just a matter of redirecting the serial interrupt; when you get there, you have to: * store incoming character in a buffer * advance the buffer pointer * check the buffer for (...) (27 years ago, 13-Feb-98, to lugnet.robotics.handyboard)
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| | Re: 'uploading' data?
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(...) Yes, this is very possible, and I've done a fair amount of work for various experiments where I needed to get data back from the board. First, you should check out (URL) the routines that the 6.270 and Handy Board that let you disable the (...) (27 years ago, 13-Feb-98, to lugnet.robotics.handyboard)
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| | Re: Lego 9V motors work well?
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In article <v03007807b10a2f11bb...4.217.7]>, Greg Starr <starr@unm.edu> writes (...) I've used lego motors and have found them much better than other motors i have tried for torque. The ease of integrating them into lego buggies is obviously a major (...) (27 years ago, 13-Feb-98, to lugnet.robotics.handyboard)
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| | Re: Sonar
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In article <v03020900b10948ab85...2.4.189]>, Michael S. Reiling <macman@inreach.com> writes (...) Did you remember to solder the C7 capacitor in? ___ IAN | |__ _______ ______ ___ ______ ___ ___ | _ \| _ | ___| | | _____|\ \/ / | |_ ) | _ | |_--- (...) (27 years ago, 13-Feb-98, to lugnet.robotics.handyboard)
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| | Re: Lego 9V motors work well?
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Hi Greg, I have been using LEGO 9v motors for a few years and I am very pleased with the results. I run freshman and sophomore engineering design and computer science courses using LEGO kits and HB's. The motors are well worth the price if you are (...) (27 years ago, 13-Feb-98, to lugnet.robotics.handyboard)
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| | Re: Lego 9V motors work well?
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LEGO motors work great. Fred (...) (27 years ago, 13-Feb-98, to lugnet.robotics.handyboard)
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| | using relays to run a motor
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Hi Ive elected to use 2 relays to run a motor. Im going to put one motor on with the power coming in 'straight' and the other one in reverse of the first one: [RELAY 1] [RELAY 2] ++ -- -- ++ (power is inverted) |--------| |---...---| | \_______ | (...) (27 years ago, 13-Feb-98, to lugnet.robotics.handyboard)
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| | Re: Lego 9V motors work well?
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[Greg Starr] spake unto the ether: (...) Performance-wise, they are okay (i.e., they are powerful enough). I don't like the short axle they have on them, though (compared to e.g. a Mabuchi motor with a LEGO 2x drilled axle Super-Glued onto the motor (...) (27 years ago, 13-Feb-98, to lugnet.robotics.handyboard)
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| | Lego 9V motors work well?
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What has been people's experience in using the Lego 9V motors with the Handyboard? I know they're overpriced, but they are easy to use... We've used small RC car motors etc. in our Lego robot course in past years, but some students have been looking (...) (27 years ago, 13-Feb-98, to lugnet.robotics.handyboard)
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| | re: 9v lego motors
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Lego motors are OK ptrformance wise (if youre talking about small robots), but the cost is really bad. What I would recommend is taking surplus motors and superglueing them together to lego bricks. Especially for photsensors and switches. phil (27 years ago, 13-Feb-98, to lugnet.robotics.handyboard)
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| | Interrupt for serial data
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I've decided to write an interrupt routine for the handling of serial data on the Handy Board. An example of an interrupt routine is given in the Handy Board technical reference. This works like a charm. I've modified it to use the SCI interrupt. (...) (27 years ago, 13-Feb-98, to lugnet.robotics.handyboard)
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