Subject:
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Re: Yup, it works.
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Tue, 4 Jun 1996 00:48:45 GMT
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Original-From:
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cristobal baray <cbaray@cs.indiana.edu#StopSpam#>
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Viewed:
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1507 times
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I didn't have any problems with the LED's - mine came with a short lead
and that always went into the square pad. I imagine I missed the C15 and
C16 errors (tantalum vs electrolytic) because I bought a kit and just
took the parts out of the packages of parts.
However, I am stuck now at the serial line and stop switch segment of the
HB production. Everything was okay up till this stage - all the tests
worked. And this test worked too (stop functions right and 1st stage of
downloading worked) - except that i noticed a flickering of
the PWR LED when I re-did the test. It seems that every now and then, the
PWR LED flickers - I'd say maybe 4 out of 10 times that the HB is turned
on. And maybe 1 of the 4 times it's on, the BATT light will flash a
couple of times as well. Even rarer, is that the PWR light will die out
completely. But the voltage on the LCD display GND and +5
are pretty solid at 5.07 during all this flashing. This happens when I
use the phone cable off the IC and when using the adapter directly to the
HB.
I've gone over solder joints as I saw this was a recommendation in the
archive of this list, but that hasn't solved much.
any other suggestions?
cris.
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Message has 1 Reply:
 | | Re: Yup, it works.
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| The PWR light isn't really an indicator of power. It's actually hooked up to the 6811's serial transmit line, so it's supposed to flash when the 6811 is talking serial. the BATT light should always blink when the board is first switched on. It also (...) (28 years ago, 4-Jun-96, to lugnet.robotics.handyboard)
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Message is in Reply To:
| | Re: Yup, it works.
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| (...) I really tried hard to make this clear -- can you explain the difficulty you had? (...) Yup, you are right. You are either the first person to notice this, or the first to report it! (...) Quiescent RS-232 levels are -10v, so the minus voltage (...) (28 years ago, 3-Jun-96, to lugnet.robotics.handyboard)
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