 | | low-cost robot platform
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A couple of weeks ago, someone wrote and said that Todd Graham had told them where to get a "cool, low cost" robot platform. I was wondering what, where, and how much was that platform? Information would be appreciated. thanks james jones James C. (...) (26 years ago, 18-Nov-98, to lugnet.robotics.handyboard)
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| | Re: Serial Communication %!*#!!--Please Help
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Hi Peter, There was recently a discussion on the list where it was revealed that the network style cable does NOT work to connect to HB's together. If you go back to the FAQ there will now be correct instructions for making a cable to link two HBs. (...) (26 years ago, 18-Nov-98, to lugnet.robotics.handyboard)
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| | finding handyboard parts
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Hi all This is a list i compiled when building my handyboard. I found some parts Quite hard to find and spent a lot of time reading through catalogs etc. So i thought it might save someone a lot of time. The list is pretty much complete and i now (...) (26 years ago, 18-Nov-98, to lugnet.robotics.handyboard)
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| | Re: 32V DC Motor
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While on the subject of motors and H-bridges. I recently ordered a L298 based motor controller kit from JCM Electronics. Unlike the L293, the L298 supports breaking and has two bits for direction and one enable bit. It would be easy to add use an (...) (26 years ago, 18-Nov-98, to lugnet.robotics.handyboard)
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| | 32V DC Motor
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hi i'm trying to use the handy-board to drive a 32V DC motor. a webpage at the handyboard website showed that this can be done by cutting the original power trace and simply plugging in a new external power source(a 36V battery pack?). what i would (...) (26 years ago, 18-Nov-98, to lugnet.robotics.handyboard)
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| | Serial Communication %!*#!!--Please Help
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I need for two HBs to communicate via the serial port. I'm using the "network" style cable. With Randy Seargent's serialio routines and the code that is in the HB FAQ. Please Help my project is due the Monday after Thanksgiving. Any input would be (...) (26 years ago, 18-Nov-98, to lugnet.robotics.handyboard)
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| | HB not responding
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Hi, I have successfully downloaded the pcode_hb.s19, but my computer can't synchronized with my Handy board. It always return the message "Handy board not responding". What should i do now ??? I'm using Windows 95 on a 233Mhz machine, and i have try (...) (26 years ago, 18-Nov-98, to lugnet.robotics.handyboard)
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| | Availability of Expansion board?
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What is the status of the Handyboard expansion board? The latest page update from Fred appears to be Jul 20th, and indicated that the board might be available at the end of the summer. Todd (26 years ago, 17-Nov-98, to lugnet.robotics.handyboard)
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| | PE4
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Hi : It is given in the standard ir_detect() routine that the detector should be connected to PE4? Can anyone tell me what is PE4 ? Is it the same as analog input 4 ? Thanks . Rajbala (26 years ago, 17-Nov-98, to lugnet.robotics.handyboard)
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| | RE: 32V DC Motor
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Greetings, We are using a LMD18200-based H-bridge circuit from Wirz Electronics to drive our motors. We simply removed a L293 chip from its socket and ran the signals (a short distance) to the LMD18200 circuit. Marco A. A. de Oliveira (...) (26 years ago, 17-Nov-98, to lugnet.robotics.handyboard)
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| | 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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