 | | Re: motor port problem .
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Philip I would first suspect that the motor chip has blown. This is eash to check since the Handy board has two L293 chips. Swap them (disconnect your motor connections) and run testmotors(). If the problem follows the chips, replace the bad one. (...) (26 years ago, 17-Nov-98, to lugnet.robotics.handyboard)
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| | Re: I overcharged my handyboard.
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Madhu: I would be very surprised that you overcharged the batteries to the point of no function. Your batteries would have to have gotten very hot for that time (batteries deteriorate in a charger due to evaporation of electrolite water). Generaly (...) (26 years ago, 17-Nov-98, to lugnet.robotics.handyboard)
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| | Re: motor port problem
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you may have blown one of your L293D chips. try swapping the two chips to see if the problem then migrates to motor 1. if it does, then you have blown an L293D. there is more info on debugging motor problems in the FAQ. See the answer to "One of the (...) (26 years ago, 17-Nov-98, to lugnet.robotics.handyboard)
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| | RE: Which M68HC11 to use
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I am using the E1FN version myself without any problems (after getting through some problems during implementation). I believe that the F describes the type of package used (square version as needed on the 'standard' board). Ronald (...) (26 years ago, 17-Nov-98, to lugnet.robotics.handyboard)
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| | Which M68HC11 to use
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I am planning to build a HandyBoard, and am in the "Gathering Stage". I just recieved the docs from Motorola; the "HC11 Reference Manual", and the "MC68HC11A8 Programming Reference Guide". The Parts list for the HandyBoard calls out for the (...) (26 years ago, 16-Nov-98, to lugnet.robotics.handyboard)
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| | I overcharged my handyboard.
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I think I overcharged my handyboard, I chargedf it for two days. I charged my handyboard using the Normal charge method. My handyboard is not responding at all. There is no power bulb glowing. Do you have any solution. I had to complete my project. (...) (26 years ago, 16-Nov-98, to lugnet.robotics.handyboard)
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| | Please use subject headers on all mail
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thanks (26 years ago, 16-Nov-98, to lugnet.robotics.handyboard)
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| | Re: Request for Books on Robotics
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Mobile Robots: From Inspiration to Implementation by Joseph L. Jones, Anita M. Flynn; As its title suggests, this book convers everything you need to know to build a mobile robot. They discuss the design of their brain (a MC68HC11 design that looks (...) (26 years ago, 16-Nov-98, to lugnet.robotics.handyboard)
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| | correct procedure when downloading pcode_hb.s19
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hi I am at present building a handyboard from Fred's assembly manual, however it appears I might have a problem. I have connected the serial interface board to the handyboard. The hb is placed into bootstrap mode by holding down the stop button. The (...) (26 years ago, 16-Nov-98, to lugnet.robotics.handyboard)
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| | motor port problem
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hi, i really need help urgently. Currently, I running my robot using 2 DC motor on port 2 & 3. I used external power supply to the L293D (pin 8). I did not cut the trace. I used Alkaline battery 12V recharagable . when I run my robot, it is running (...) (26 years ago, 16-Nov-98, to lugnet.robotics.handyboard)
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