 | | RE: 32V DC Motor
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Just a quick note.. As i remember if you stack the SN??? chips to get the current rating you also have to piggyback a L293D as these incorporate the anti-spike protection diodes as the others don't Russ..... -----Original Message----- From: MAR (...) (26 years ago, 17-Nov-98, to lugnet.robotics.handyboard)
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| | LEGO: looking for gears
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Is there an inexpensive way to get a large assortment of many LEGO gears? Third parties? -Doug Blank (26 years ago, 17-Nov-98, to lugnet.robotics.handyboard)
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| | Re: 32V DC Motor
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There's an alternative to th4e L293D chip that fits the Handy Board. This chip can supply 1A. I know you need 2+ Amps but a common method adopted by some people is piggybacking two or more chips. (You put one on top of another to allow the curent to (...) (26 years ago, 17-Nov-98, to lugnet.robotics.handyboard)
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| | Re: Please use subject headers on all mail
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(...) Thanks Liddy PLEASE !!! Use subject headers on your e-mail. Beam; Handyboard; PIC; MICROE; MicroMouse; Motors; LEGO; and etc. Any letter case is better than no classification of the subject. Thanks Ed Spike 73,33 -- (26 years ago, 17-Nov-98, to lugnet.robotics.handyboard)
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| | Re: 32V DC Motor
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Edmund, I recently received 2 LMD18200 chips from National Semiconductor through their free samples order (limit 2/day, 5/week). These chips deliver up to 3A continous output, and up to 6A peak. They are ideal for driving DC/ Stepper motors. All the (...) (26 years ago, 17-Nov-98, to lugnet.robotics.handyboard)
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| | 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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