Subject:
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Re: pcode downloading
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Fri, 3 Jan 1997 19:54:10 GMT
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Original-From:
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Karl Altenburg <altenbur@plains.!avoidspam!nodak.edu>
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Viewed:
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2432 times
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On Fri, 3 Jan 1997, Fred G. Martin wrote:
> OK, well I think it is isolated at the pseudo-MAX232 chip. Did you
> get the +10 v power supply pin on the p-MAX ok? It's at pin 2.
> Measure it w/r/t ground and you should get +10v.
Yep, that checks out.
> Before you order a real Maxim, check the polarity of your
> electrolytics. Also, it is possible that one of them is marked wrong.
> I have seen this---electrolytics with their wrapper on backward so you
> install it wrong. I am not kidding.
>
> Measure the voltage across each of the 10uF electro's. Two of them
> should have 5v across their terminals, two of them should have 10
> volts.
I get the correct voltages for the caps. And if the wrappers are on
correctly they should all have the correct polarity.
I ordered a replacement MAX232CPE (not the high speed "A" version).
Hopefully this will either fix things or answer some questions.
Karl R Altenburg altenbur@plains.NoDak.edu
North Dakota State University, Fargo, ND 58105
All things are artificial, for nature is the art of God. SIR THOMAS BROWNE
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Message is in Reply To:
 | | Re: pcode downloading
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| (...) OK, well I think it is isolated at the pseudo-MAX232 chip. Did you get the +10 v power supply pin on the p-MAX ok? It's at pin 2. Measure it w/r/t ground and you should get +10v. Before you order a real Maxim, check the polarity of your (...) (28 years ago, 3-Jan-97, to lugnet.robotics.handyboard)
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