Stuart Ball's Analog Interfacing to Embedded Microprocessor Systems. Real PDF

By Stuart Ball

ISBN-10: 0750677236

ISBN-13: 9780750677233

  • Provides hard-to-find info on interfacing analog units and applied sciences to the simply electronic global of embedded microprocessors. supplies the reader the perception and viewpoint of a true embedded structures layout engineer, together with guidance that just a hands-on expert may understand. Covers very important concerns for either and software program systmes whilst linking analog and electronic units. -Embedded expertise ...a entire resource on interfacing the true global to microprocessors should still turn out helpful to embedded platforms engineers, scholars, technicians, and hobbyists. a person fascinated by connecting the analog atmosphere to their electronic machines, or troubleshooting such connections will locate this ebook in particular helpful. - Embedded know-how typically, for all of the sections, there are many easy diagrams and in addition the math is stored to an easy point. ...I like this e-book and suggest it as an advent to the topic for domestic use, scholars and SW Engineers. - Chris Hills within the ACCU journal CVu ...there are lots of uncomplicated diagrams and in addition the mathematics is saved to an easy point. i admire this booklet and suggest it as an advent to the topic for domestic use, scholars and engineers. -Chris Hills within the ACCU journal CVu

Content:
Preface

, Page ix
Introduction

, Page xi
1 - procedure Design

, Pages 1-12
2 - Analog-to-Digital Converters

, Pages 13-46
3 - Sensors

, Pages 47-90
4 - Time-Based Measurements

, Pages 91-106
5 - Output regulate Methods

, Pages 107-143
6 - Solenoids, Relays, and different Analog Outputs

, Pages 145-169
7 - Motors

, Pages 171-213
8 - Electromagnetic Interference

, Pages 215-223
9 - High-Precision Applications

, Pages 225-241
10 - general Interfaces

, Pages 243-246
11 - Analog Toolbox

, Pages 247-273
Appendix A - Opamp Basics

, Pages 275-286
Appendix B - Pulse Width Modulation

, Pages 287-297
Appendix C - valuable URLs

, Pages 299-300
Appendix D - Python Code for bankruptcy eleven; Excel facts for bankruptcy 4

, Pages 301-306
Glossary

, Pages 307-309
Index

, Pages 311-322

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Additional resources for Analog Interfacing to Embedded Microprocessor Systems. Real World Design

Example text

This tolerance typically ranges from 1% to 10%, d e p e n d i n g on the specific part used. Some thermistors are designed to be interchangeable in applications where it is impractical to have an adjustment. Such an application might include an i n s t r u m e n t in which the user or a field engineer has to replace the thermistor and has no i n d e p e n d e n t means to calibrate it. 2 shows a typical circuit that could be used to allow a microprocessor to measure t e m p e r a t u r e using a thermistor.

T h e C T R is sometimes specified as a ratio, and sometimes specified in a table that shows the collector c u r r e n t for various values of LED current. T h e CTR is d e p e n d e n t on the LED and phototransistor characteristics, and can vary widely from one device to the next. T h e current transfer ratio has several implications when you want to interface a switch to a microprocessor system. 8), the transistor o u t p u t has to swing between valid logic levels. T o ensure that the phototransistor saturates, the value of the pullup resistor is limited.

9 If using an ADC that does not indicate when conversion is complete, ensure that software allows conversion to complete before reading result. 9 Be sure reference accuracy meets requirements of the design. 9 Bypass reference input as r e c o m m e n d e d by ADC manufacturer. 9 Be sure the processor can keep up with the conversion rate. 46 Analog Interfacing to Embedded Microprocessor Systems Sensors 3 Sensors provide the window t h r o u g h which a microprocessor system can see what is h a p p e n i n g in the real world.

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Analog Interfacing to Embedded Microprocessor Systems. Real World Design by Stuart Ball


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