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| (...) I agree that the "software" solution in an HC11 is limiting. It is this limitation that I am trying to overcome in hardware. Rather than shift a bit-pattern out for PWM, I would use three of the built-in timers to accomplish the task. One (...) (28 years ago, 27-Jun-96, to lugnet.robotics.handyboard)
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| (...) Actually an 'HC11 isn't a very efficient PWM controller. However a Microchip PIC is. (or a Motorola 68HC05, or a Siemans 87C752, etc) These single chip microcontrollers are both cost effective and easy to use. In the July (or August) '95 issue (...) (28 years ago, 26-Jun-96, to lugnet.robotics.handyboard)
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| My earlier posting has left me thinking.. (Suprise!) A MUCH more efficient way of doing PWM would be to use another 'HC11. The counter-timer circuits are perfect for the job, and the SPI would serve just fine for communications. Of course, this (...) (28 years ago, 26-Jun-96, to lugnet.robotics.handyboard)
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| What's Happening?? (Or, trying to spark some interaction) I currently am working on a few hardware projects for the Handy-Board.. As I may have described earlier.. Current projects include 4 boards, each on a PC slightly smaller than the (...) (28 years ago, 26-Jun-96, to lugnet.robotics.handyboard)
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| (...) Ahh, well that's good, and bad. :-) C'mon everyone, what's everybody _doing_ with their handy board? Letting it sit on the desk, beeping and collecting dust? (28 years ago, 26-Jun-96, to lugnet.robotics.handyboard)
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| Just curious if something is wrong, I haven't gotten mail from the list in quite some time. (4 or 5 days) (28 years ago, 26-Jun-96, to lugnet.robotics.handyboard)
| | | | | 6811 Suppliers
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| I just bought a MC68HC11A1FN from BG micro for $7.99 you can find them at (URL) ,,, (o o) ===...===oOO==(_)==OOo===...=== "Its difficult to work in groups when you are omnipotent...." -Q (URL) Mike Downey mdowney@eng.ua.edu (URL) .oooO Oooo. (URL) (...) (28 years ago, 26-Jun-96, to lugnet.robotics.handyboard)
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| (...) I would say you should check for a short between the E Clock and another trace. Curt Mills, WE7U. hacker@tc.fluke.com archer@eskimo.com we7u@we7u.ampr.org (URL) (28 years ago, 21-Jun-96, to lugnet.robotics.handyboard)
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| I, too, have had problems downloading pcode to the latest handy board I have built. I have replaced every ic with the ic's from a working handy board, and have tested each trace from all 4 of the ic's that were installed (6811, 132, 62256 and the (...) (28 years ago, 21-Jun-96, to lugnet.robotics.handyboard)
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| hello, i wrote a mail about an hour ago. this message was not really complete. i shall explain the problem. i am a student electrical engineering at the uneversity of twente, the netherlands. we were ordered to design something. we decided to built (...) (28 years ago, 20-Jun-96, to lugnet.robotics.handyboard)
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