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Learning BeagleBone

You're reading from   Learning BeagleBone Learn how to love and care for your BeagleBone and teach it tricks

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Product type Paperback
Published in Dec 2014
Publisher
ISBN-13 9781783982905
Length 206 pages
Edition 1st Edition
Tools
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Author (1):
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Hunyue Yau Hunyue Yau
Author Profile Icon Hunyue Yau
Hunyue Yau
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Toc

Table of Contents (13) Chapters Close

Preface 1. Introducing the Beagle Boards 2. Software in the BeagleBone FREE CHAPTER 3. Building an LED Flasher 4. Refining the LED Flasher 5. Connecting the BeagleBone to Mobile Devices 6. Recovering from the Mistakes 7. Interfacing with the BeagleBone 8. Advanced Software Topics 9. Expansion Boards and Options A. The Boot Process B. Terms and Definitions
Index

Electrical engineering in a nutshell


This chapter is not intended in any way as a substitution for a proper education in electrical engineering! We will go over some of the fundamentals in the context of the BeagleBone so that the rest of the chapter makes sense.

Electrical properties

Electricity has three basic properties, namely, voltage, current, and resistance. Using a water analogy, voltage can be considered as the pressure and current can be considered as the rate of the water flow. Voltage is measured in volts and is written as V and current is measured in amperes and is written as either amp or A. For many of our purposes, it is convenient to measure current in milliamp or mA. This is 1/1000th of an amp. Tie this to the water analogy and amperes is the rate of charge per second. Resistance is what lets us control the amount of current or voltage. Resistance is measured in ohms.

Resistance, voltage, and current are related to each other by Ohm's law (http://en.wikipedia.org/wiki/Ohm...

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