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 | | brief hiatus
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| hi all, i'm out of the country and probably out of e-mail touch through sunday. mailing list unsubscribe requests, etc. will be handled next week. best, fred (27 years ago, 10-Jun-97, to lugnet.robotics.handyboard)
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fred
(score: 0.073)
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| | No messages since May 5,1997
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| Dear Fred: I have not received any messages from [handyboard] since May5, (exactly the date when my credit card was charged $100 for the professional copy of IC3.1). I also have not received any printed manuals (promised just after May 5th) and my (...) (27 years ago, 26-Jun-97, to lugnet.robotics.handyboard)
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fred
(score: 0.073)
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fred
(score: 0.072)
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| | Motors: Please help! Going out of my mind...
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| Please somebody help! Actually it's not quite that bad, but I've been searching and hunting trying to find some motors to use for a new robot base. Does anyone have any suggestions for where to find motors with gearboxes that can carry a few pounds (...) (27 years ago, 25-May-97, to lugnet.robotics.handyboard)
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fred
(score: 0.071)
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| | RE: weird headers
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| (...) Thanks, I stuck a pot in it's place and fiddled with it until I got 4.49k and it worked great. I came up with the 4.49k by taking 1/x*.0068 = 32.75. Where .0068 is the cap, and 32.75 was my desired frequency. So x was determined to be 4.49 (...) (27 years ago, 23-May-97, to lugnet.robotics.handyboard)
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fred
(score: 0.071)
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fred
(score: 0.071)
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| | Handy Board - Interface/Charger Board
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| Hi, I have started a project to build a Handy Board and everything was going fine until I started checking voltage in step 3.2.2. I get around +5 volts going from pin 2 of U16 to pin 7 of J9. Also, when checking pin 6 of U16 I'm getting nothing. I (...) (27 years ago, 12-Jun-97, to lugnet.robotics.handyboard)
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fred
(score: 0.071)
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| | weird headers
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| That particular weird header is originated by John Whitten, aka root@snotnose.wizard.org, not my mail list program. All my mail list program does is forward along any mail sent to "handyboard@media.mit.edu" to each person on the distribution list. (...) (27 years ago, 22-May-97, to lugnet.robotics.handyboard)
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fred
(score: 0.071)
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| | RE: IR
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| Brett, Since I'm going through a couple of corporate LANs and WANs, it would be no easy task to reconfigure my mailer. Perhaps you could tell Eudora to filter your messages if the To: field *contains* the word handyboard, rather than the whole (...) (27 years ago, 22-May-97, to lugnet.robotics.handyboard)
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fred
(score: 0.071)
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| | IR
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| Hello all, I've been playing with IR proximity sensors, and wonder if anyone can provide some suggestions. I hooked up an IR LED (Radio Shack 'high output IR LED') to the Handyboard's IR output with a 330ohm resistor in series (the smallest value (...) (27 years ago, 22-May-97, to lugnet.robotics.handyboard)
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fred
(score: 0.071)
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| | Re: IR signal
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| Sounds to me like your LED is just not focused straight ahead. I found that sticking the IR LED in a Radio Shack panel mount LED holder (cat no 276-080a) worked the best for focusing the beam of IR. I had tried soda straws and other things, but the (...) (27 years ago, 21-May-97, to lugnet.robotics.handyboard)
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fred
(score: 0.071)
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| | 6500 Sonar and HandyBoard
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| Kent, I read your quick explaination of how to connect the Polaroid 6500 sonar board to the HandyBoard, and I have a couple of questions.... Mainly, you mention that the INIT signal plugs into pin 9 of the second motor driver chip socket, and that (...) (27 years ago, 20-May-97, to lugnet.robotics.handyboard)
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fred
(score: 0.071)
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| | Soldering...
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| (...) Mirco >System, since I'm a bit tight with money. However, I'm a bit hesitant >about assembling the kit because I have no experience at all with (...) like the HB before (I'm a software type guy), but thanks to Fred Martin's concise (...) (27 years ago, 20-May-97, to lugnet.robotics.handyboard)
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fred
(score: 0.071)
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fred
(score: 0.071)
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| | Re: Generic 68HC11 board question-
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| w/o the ds1233, the contents of the ram will become corrupted during power-up or power-down of the 6811. an r/c could protect during power-up, but wouldn't reset the 6811 during power down. remember it's still trying to execute code as system (...) (27 years ago, 20-May-97, to lugnet.robotics.handyboard)
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fred
(score: 0.071)
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| | Handy Board Weight
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| Hmm.. Seems my reply address was wrong in my original message, so i'm re-posting this with the right address. (Thanks Fred for pointing this out). I'm working with a robot where weight is very important. I was wondering if anyone had the exact (...) (27 years ago, 9-Jun-97, to lugnet.robotics.handyboard)
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fred
(score: 0.071)
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| | re: Digital Micro Systems
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| (...) I called them up a couple of weeks ago to order complete boards, and they said they were backordered on the completed kits, but could send an unassembled kit. So I ordered a kit and it arrived in 3 days. It turned out that I had received a bad (...) (27 years ago, 20-May-97, to lugnet.robotics.handyboard)
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fred
(score: 0.071)
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| | HOW TO UNSUBSCRIBE
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| Greetings, This is the periodic message about unsubscribing. Please DO NOT send unsubscribe messages to the whole list. To unsubscribe, send email to fredm@media.mit.edu. Regards, Fred (27 years ago, 19-May-97, to lugnet.robotics.handyboard)
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fred
(score: 0.071)
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fred
(score: 0.071)
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| | Maze madness
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| Maze-running competitions are one of the earliest ways used to test mobile robots. They force developers to build mechanical mice that quickly learn the most effective path to a goal and reach it in the shortest time. The mazes range from tabletop (...) (27 years ago, 9-Jun-97, to lugnet.robotics.handyboard)
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fred
(score: 0.071)
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