28129 Parallax Inc, 28129 Datasheet - Page 75
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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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Chapter 3: Basic Analog to Digital Conversion · Page 65
Why did I learn it?
There is a wide variety of electronic applications where analog signals are measured and
digital devices are used to process the analog signal data. In this experiment, we used a
BASIC Stamp and A/D converter combination to construct a digital DC voltmeter. We'll
be using the BASIC Stamp DC-DVM in several of the remaining experiments. There is a
surprising variety of uses for such a device as you will discover with each new
experiment.
How can I apply this?
In developing the digital voltmeter, the process of sampling voltage, converting it, and
processing it in digital form was introduced. An example of another use for an A/D
interface is the digital sampling of the analog signal from a microphone for digital
recording purposes. Another example that could make use of the circuit we built is a
door sensor. Our potentiometer could be attached to a door hinge, and the analog
information could be used to monitor how far the door is open. This circuit could in turn
be incorporated into a larger system that controls how far open the door swings.
The field of analog to digital conversion is an industry in itself. There are semi-conductor
manufacturing companies that specialize solely in creating A/D conversion chips and
systems. Whether you’d like to design at the component level, or at the integrated circuit
level, there will always be a need for creative analog interfacing – simply because the
world isn’t black and white (binary), it’s all the colors in-between as well (analog).
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