Subject:
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Re: analog input test
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Sat, 7 Feb 1998 14:01:34 GMT
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Original-From:
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Fred G. Martin <fredm@(spamless)media.mit.edu>
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Viewed:
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1994 times
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If the sensor headers look like this:
live signal [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [X]
+5v [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ]
ground [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [X]
sensor# 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Then for sensor 0, you use the header pins marked as [X].
If you are sure you have a 10K resistor, and you are using the correct
pins, and you are getting a reading of 5 or 6 (not 40), then this
suggests that the resistor pack value is wrong. You should have a 47K
resistor pack. If a 10K resistor yields a value of 5 or 6, you might
have a 470K resistor pack soldered down between the +5v and signal
rows.
re: DL, thanks for your observations. I'll take note of it.
Fred
In your message you said:
> Fred;
>
> I am at the testanalogs portion of the assembly process. All has gone
> well up until this point. The knob varies between 0 and 255 as
> expected and the seven numbers all come up either 254 or 255 when I
> press the START button. However I am confused as to which headers I
> should insert the 10k resistor as well as the output I receive depending
> on which header pairs I use. Are the two outer most headers the two
> that are side by side at the edge of the board? If I insert the
> resistor in these the readings all stay 254 or 255. Or are the two
> outermost headers those which are separated by the in line resistor and
> the other header, (i.e. the header closest to the edge and the header
> closest to the plcc socket)? When I insert the resistor in these
> headers the number changes to 5 or 6 not 45. The voltage at pins 51 and
> 52 check out and I seem to have continuity.
>
> By the way, I attempted to download Pcode using hbdl and dlm using a 233
> Pentium II, a 166 Pentium, and a 386 all without success. However, I
> was successful on the first try on the Pentium II using dl in a DOS
> window. Perhaps this should be recommended as the default down loader
> for PC's.
>
> Love your board;)
>
> Pat Benoy
>
>
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Message is in Reply To:
 | | analog input test
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| Fred; I am at the testanalogs portion of the assembly process. All has gone well up until this point. The knob varies between 0 and 255 as expected and the seven numbers all come up either 254 or 255 when I press the START button. However I am (...) (27 years ago, 5-Feb-98, to lugnet.robotics.handyboard)
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