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 | | Re: Handyboard LCD
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| (...) Go to the IC Source page, linked off the software resources page. This has links to the source code. YOu need the pcocde for the HB, the special as11 assembler, and a shell script facility for the as11_ic program. these are all pthere. look at (...) (28 years ago, 4-Jul-96, to lugnet.robotics.handyboard)
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fred
(score: 0.987)
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| | Re: L293 vs TI 754410
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| (...) The TI chips should work fine. You might not get a full 2A, but at least a 50% improvement. (...) The traces can handle it, but the PolySwitch fuse should limit total current to about 4 to 5 A. You might need to remove the fuse and live (...) (28 years ago, 10-Jul-96, to lugnet.robotics.handyboard)
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fred
(score: 0.987)
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fred
(score: 0.987)
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| | Re: Source for LCD's
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| (...) From the components supply list at (URL) compatible retail display is the Hitachi LM-052L. Supplier info for Hitachi parts is available at (URL) Other valid manufacturers/part numbers: Alps LDS7A1792A; Optrex DMC16249. (...) Electrically, any (...) (28 years ago, 10-Jul-96, to lugnet.robotics.handyboard)
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fred
(score: 0.987)
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| | Re: Malloc
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| 8K might be all that IC allows for user global data. The memory map can be rearranged, but only at the compile-time of the IC application. Newton Labs should be able to give you a definitive answer about the memory organization of IC 3.1. -Fred In (...) (28 years ago, 12-Jul-96, to lugnet.robotics.handyboard)
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fred
(score: 0.987)
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| | Re: Questions, questions, questions......
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| (...) The Handy is like the 6.270; both have dig out latches going to the motors. The RW drives the motor ctrl pins directly. A re-write of the system PWM routines could provide finer than 8 levels of control, even w/o needing HW timer lines. (...) (...) (28 years ago, 10-Jul-96, to lugnet.robotics.handyboard)
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fred
(score: 0.987)
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| | Re: Newbie Questions (Sensors)
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| (...) using the LEGO light and angle sensor is non-trival; custom HW and SW drivers are required. See ftp://cher.media.mit...gosens.txt for details. (...) 0-12 inches is hard, but 0-1 or 2 inches can be done with a simple IR reflectance sensor. See (...) (28 years ago, 11-Jul-96, to lugnet.robotics.handyboard)
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fred
(score: 0.987)
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| | status of the expansion board
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| Hi all, Many people are asking about the Expansion Board. It has been on the "back burner" because my publisher is demanding text, not technology. But I do plan to release another rev this summer. My ideas about what should go on it have evolved, (...) (28 years ago, 11-Jul-96, to lugnet.robotics.handyboard)
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fred
(score: 0.987)
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| | web site update
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| Hi all, I've made some cosmetic changes to the HB web site. If anyone has any feedback, positive or negative, i'd like to hear it. Thanks, Fred (28 years ago, 19-Jul-96, to lugnet.robotics.handyboard)
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fred
(score: 0.987)
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| | encoders
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| (...) if your counting program is written in IC, and not assembly lang, it might be too slow and occasionally miss counts. -F (28 years ago, 17-Jul-96, to lugnet.robotics.handyboard)
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fred
(score: 0.986)
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| | Re: Memory/Sampling Rate
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| (...) not easily. half of the lower 32k of the 6811 address space is consumed by the '138 circuit to generate 4 digital input and 4 digital output areas. it would be possible to have some kind of data memory area making use of the signals on the exp (...) (28 years ago, 31-Jul-96, to lugnet.robotics.handyboard)
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fred
(score: 0.985)
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fred
(score: 0.984)
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| | Re: Charging the battery
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| Make sure your adapter is 12v, 500 mA. If you have a voltmeter, measure the open-circuit voltage (when it's plugged into the wall, but not operating anything); you should get around 17 v. -F (...) (28 years ago, 7-Aug-96, to lugnet.robotics.handyboard)
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fred
(score: 0.984)
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| | Re: Can't initialize CONFIG register
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| Hi, Fred: You were right, Fred- changing computers solved the problem. I switched from using my Pentium machine to my old 386-33, and it worked fine. Some kind of timing issue? One interesting thing, though. I still get this error, whenever I D/L (...) (29 years ago, 17-Feb-96, to lugnet.robotics.handyboard)
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fred
(score: 0.984)
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| | HOW TO UNSUBSCRIBE
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| Greetings all, This is the sporadic reminder to please DIRECT LIST ADMINISTRATIVIA TO ME PERSONALLY, not to the 150+ people on the list. There is no auto-listserv program reading the mail. That's right, any requests to unsubscribe, add, or change (...) (28 years ago, 21-Aug-96, to lugnet.robotics.handyboard)
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fred
(score: 0.984)
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| | Re: -POWER GLITCH- message
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| One possibility: make sure you have loaded pcode_hb.s19 onto the board, and *not* pcoder22.s19. when you say "even if I don't move the HB at all after runing for a few seconds the HB usually crashes" do you mean, it crashes with the "-POWER GLITCH-" (...) (28 years ago, 16-Aug-96, to lugnet.robotics.handyboard)
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fred
(score: 0.983)
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fred
(score: 0.983)
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fred
(score: 0.982)
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| | Re: Charge polarity on each board opposite?
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| (...) right; randy sargent's dl does automatically check the config and burn it if it's wrong. so your config is probably okay. (...) wait; you mean "pcode_hb.S19," right? when it downloads it doesn't give any errors? but the pcode still won't run. (...) (28 years ago, 5-Sep-96, to lugnet.robotics.handyboard)
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fred
(score: 0.981)
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| | Trinity College robot contest
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| Hi everyone, Jake Mendelssohn has posted the rules for the 4th annual spring 1997 Fire-Fighting Robot Contest. I went to the 1996 contest and it was great fun. The contest draws people from all over the world, including hobbyists, university folk, (...) (28 years ago, 11-Sep-96, to lugnet.robotics.handyboard)
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fred
(score: 0.981)
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