28129 Parallax Inc, 28129 Datasheet - Page 85
28129
Manufacturer Part Number
28129
Description
TEXT BASIC ANALOG & DIGITAL
Manufacturer
Parallax Inc
Type
Programmingr
Datasheet
1.28129.pdf
(176 pages)
Specifications of 28129
Style
Book
Title
Basic Analog and Digital
Contents
Basic Analog and Digital Text
Product
Microcontroller Accessories
Lead Free Status / RoHS Status
Not applicable / Not applicable
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Modify the Code
If the D/A converter works as we expect, each time the value of
the D/A output should increment by 0.2 volts. Try starting with n=0 by modifying the
value of
Then run the program again with n=1.
Then change n to 2 and run the program a third time.
Continue for each value up to
Figure 4-4 shows a sample measurement of a resistive ladder D/A conversion with the
value of
Chapter #3, we were interested in programming our DVM for accurate calculations to the
nearest hundredth of a volt. In this experiment, anything within 10% of the expected
value is fine. So your end output when
volts. If the errors are larger than that, double check to make sure that a 1k
didn’t get swapped with a 2k somewhere in the resistive ladder.
n = 0
n = 1
n = 2
n
n
in the
set to 15. Remember that the 10% resistors lead to some error in the output. In
DAC
subroutine.
n=15.
n=15
might be as low as 2.7 volts or as high as 3.3
n
is incremented by 1,
'
'
'
resistor
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