Index

A note on the digital index

A link in an index entry is displayed as the section title in which that entry appears. Because some sections have multiple index markers, it is not unusual for an entry to have several links to the same section. Clicking on any link will take you directly to the place in the text in which the marker appears.

Symbols

$ prompt, Command-Line Interface is Everywhere, Forever

> (redirection) operator, Writing to Files Without an Editor

A

acceleration

accelerometer uses, Acceleration

accelerometers vs. gyroscopes, Acceleration vs. Angular Velocity

MPU 6050 sensor, Experiment: Accelerometer and Gyro Together–Endianness—Typically on the Small Side

MX2125 sensor, Experiment: Accelerate with MX2125

Robot Hand Controlled by Wii Nunchuk project, Test Project: Robot Hand Controlled by Wii Nunchuk–Adding Hand Mechanics

vs. angular velocity, Acceleration vs. Angular Velocity

Wii Nunchuk controller, Experiment: Hacking Wii Nunchuk (with I2C)–Nunchuk Code and Connection for Raspberry Pi

active infrared distance sensor, Distance

alarms

emailing, Test Project: Emailing Smoke Alarm–Packaging

posture alarms, Alarm, Alarm!

alcohol detection, Experiment: Breathalyzer (Alcohol Sensor MQ-303A)

alcometers, Experiment: Breathalyzer (Alcohol Sensor MQ-303A)

Analog 2-axis Thumb Joystick, Experiment: Thumb Joystick (Analog Two-Axis Thumb Joystick)

Ancient Chest project, Test Project: Ancient Chest from the Future–Ancient Chest Code and Connection for Arduino

angular velocity, Acceleration vs. Angular Velocity

Arduino

automatic emails from, Could Arduino Send Email? Not Easily

basic setup, Basic Arduino Setup

benefits of, Arduino

blink test, Hello World

bootloader program, Arduino

code/connection information

AttoPilot Compact DC sensor, AttoPilot Code and Connection for Arduino

burglar alarms, Burglar Alarm Code and Connection for Arduino

buttons, Code and Connection for Arduino

capacity sensor, Experiment: Build Your Own Touch Sensor

color sensors, Color Sensor Code and Connection for Arduino

DHT11 humidity sensor, DHT11 Code and Connection for Arduino

ELB149C5M sensor, RFID Code and Connection for Arduino Mega

flame sensors, Flame Sensor Code and Connection for Arduino

FlexiForce sensor, FlexiForce Code and Connection for Arduino

GT-511C3 sensor, Fingerprint Sensor Code and Connection for Arduino Mega

GY65 barometric pressure sensor, GY65 Code and Connection for Arduino

Hall effect sensors, Hall Effect Sensor Code and Connection for Arduino

Hall switch, Hall Switch Code and Connection for Arduino

HC-SR04 sensor, HC-SR04 Code and Connection for Arduino

IR Compound Eye, Compound Eye Code and Connection for Arduino

IR distance sensor, IR Switch Code and Connections for Arduino

joysticks, Joystick Code and Connection for Arduino

keypads, Keypad Code and Connection for Arduino

LDR photoresistor, LDR Code and Connection for Arduino

line sensors, Line Sensor Code and Connection for Arduino

LM35 temperature sensor, LM35 Code and Connection for Arduino

LSM303 compass-accelerometer, LSM303 Code and Connection for Arduino

microphone breakout boards, Microphone Breakout Code and Connection for Arduino

microswitches, Microswitch Code and Connection for Arduino

MPU 6050 sensor, MPU 6050 Code and Connection for Arduino

MQ-2 sensor, MQ-2 Code and Connection for Arduino

MQ-3 sensor, Experiment: Breathalyzer (Alcohol Sensor MQ-303A)

MX2125 accelerometer, Accelerometer Code and Connection for Arduino

Ping sensor, Ping Code and Connections for Arduino

potentiometers, Potentiometer Code and Connection for Arduino

QT113 sensor, QT113 Code and Connection for Arduino

RGB LEDs, Finding the Leads of an RGB LED

rotary encoders, Rotary Encoder Code and Connection for Arduino

servo motors, Haunted Bell Code and Connection for Arduino

soil humidity sensor, Soil Sensor Code and Connection for Arduino

tilt sensors, Tilt Sensor Code and Connection for Arduino

vibration sensors, Vibration Code and Connection for Arduino

weather forecast, Weather Forecast Code and Connection for Arduino

Wii controller, Nunchuk Code and Connection for Arduino

communication with Raspberry Pi, Talking to Arduino from Raspberry Pi

OS X setup, OS X

posture alarm test project, Test Project: Posture Alarm (Arduino)

program anatomy, Anatomy of an Arduino Program

shields for, Shields Make It Easy and Robust

atmospheric pressure, Atmospheric Pressure GY65

AttoPilot Compact DC Voltage/Current Sense

Arduino code/connection, AttoPilot Code and Connection for Arduino

overview of, Experiment: Voltage and Current

Raspberry Pi code/connection, AttoPilot Code and Connection for Raspberry Pi

attributions, Using Code Examples

B

barometric pressure sensors, Atmospheric Pressure GY65

BCM numbers, Two Numbering Systems: Purpose and Location

bicycle speedometers, Experiment: Is It Magnetic?, Experiment: Hall Switch

big endian, Endianness—Typically on the Small Side

binary numbering system, Hexadecimal, Binary, and Other Numbering Systems

biometric identification, Identity

bitmap images, Storing Images in Header Files

bitwise operations

bit masking, Bit Masking with Bitwise AND &

bit shifting <<, Bit Shifting <<

bitwise or |, Bitwise OR |

endianness and, Endianness—Typically on the Small Side

overview of, Bitwise Operations

boolean operations, Bitwise Operations

bootloader program, Arduino

Breathalyzer, Experiment: Breathalyzer (Alcohol Sensor MQ-303A)

burglar alarm

adaptation period, Experiment: Burglar Alarm! (Passive Infrared Sensor)

Arduino code/connection, Burglar Alarm Code and Connection for Arduino

Raspberry Pi code/connection, Burglar Alarm Code and Connection for Raspberry Pi

testing, Environment Experiment: Cheating an Alarm

tilt sensors for, Experiment: Which Way Is Up? (Tilt Ball Switch)

buttons

Arduino code/connection, Code and Connection for Arduino

pull-up resistors, Pull-Up Resistor

pushbuttons, Experiment: Button

Raspberry Pi code/connection, Code and Connection for Raspberry Pi

C

C header files, Storing Images in Header Files

capacitive touch sensors

building your own, Experiment: Build Your Own Touch Sensor

operation of, Experiment: Sense Touch Without Touch (Capacitive Touch Sensor QT113)

protocol for, Experiment: Sense Touch Without Touch (Capacitive Touch Sensor QT113)

QT113, QT113 Code and Connection for Arduino

sensing through solid objects, Environment Experiment: Sensing Touch Through Wood

types of, Experiment: Sense Touch Without Touch (Capacitive Touch Sensor QT113)

carbon monoxide (CO), Experiment: Detect Smoke (Analog Gas Sensor)

cat command, Writing to Files Without an Editor

Chameleon Dome project

casing for, Dome Building Tips

combining codes in, Combining Codes, Dome Building Tips

overview of, Test Project: Chameleon Dome

random noise and, Moving Average

RGB LEDs, RGB LED

climate sensors (see weather/climate)

code examples, permission to use, Using Code Examples

color sensors

Arduino code/connection, Color Sensor Code and Connection for Arduino

overview of, Experiment: All the Colors of the ’Bow

Raspberry Pi code/connection, Color Sensor Code and Connection for Raspberry Pi

command-line interface (CLI)

controlling GPIO pins from, Controlling GPIO Pins from the CLI

in Linux, Feeling at Home in Linux, Ubuntu Linux

script automation, Command-Line Interface is Everywhere, Forever

starting in Raspberry Pi, Looking Around

sudo command, sudo Make Me a Sandwich

common anodes/cathodes, RGB LED

compass heading calculation, Compass Heading Calculation

compass-accelerometers, Experiment: Magnetic North with LSM303 Compass-Accelerometer

configuration files, Text Files for Configuration

Control-X, Looking Around

Cron, Timed Tasks with Cron

D

daemons, installing, sudo Make Me a Sandwich

data pins, reading state of, Pull-Up Resistor

data visualization, sudo Make Me a Sandwich, What You’ll Learn

datasheets, Decoding MX2125 Pulse Length

DHT11 humidity sensor, Experiment: Is It Humid in Here?

digital vibration sensors, Experiment: Good Vibes with Interrupt (Digital Vibration Sensor)

distance

detecting infrared light, Environment Experiment: How to See Infrared

detection methods, Distance

echo calculations, Echo Calculations Explained

following movement, Experiment: Follow Movement with Infrared (IR Compound Eye)–Alternative Circuits for Raspberry Pi

HC-SR04 ultrasonic sensor, HC-SR04 Ultrasonic Sensor–Environment Experiment: Invisible Objects

measuring with ultrasonic sound (PING), Experiment: Measure Distance with Ultrasonic Sound (PING)–Ping Code and Connections for Raspberry Pi

obstacle detection, Experiment: Detect Obstacles With Infrared (IR Distance Sensor)–IR Switch Code and Connections for Raspberry Pi

soft objects and, Environment Experiment: Invisible Objects

test project, Test Project: Posture Alarm (Arduino)–Putting Everything in a Neat Package

duty cycles, RGB LED Shows Any Color, Decoding MX2125 Pulse Length

E

E-paper Weather Forecast project

Arduino code/connection, Weather Forecast Code and Connection for Arduino

enclosure for, Enclosure Tips

image display/storage, Storing Images in Header Files

overview of, Test Project: E-paper Weather Forecast

power requirements, Environment Experiment: Look Ma, No Power Supply

easing, Easing Input to Output

echo calculations, Echo Calculations Explained

ELB149C5M sensor

Arduino code/connection, RFID Code and Connection for Arduino Mega

protocols for, RFID with ELB149C5M Electronic Brick

Raspberry Pi code/connection, RFID Code and Connection for Raspberry Pi

Electret Microphone, Experiment: Hearing Voices/Volume Level

electricity/magnetism

detection methods, Electricity and Magnetism

Hall switches, Experiment: Hall Switch–Hall Switch Code and Connection for Raspberry Pi

LSM303 compass-accelerometer, Experiment: Magnetic North with LSM303 Compass-Accelerometer–Compass Heading Calculation

measuring magnetism, Experiment: Is It Magnetic?–Hall Effect Sensor Code and Connection for Raspberry Pi

measuring voltage and current, Experiment: Voltage and Current–AttoPilot Code and Connection for Raspberry Pi

Solar Cell Web Monitor project, What You’ll Learn–Timed Tasks with Cron

email

automatic alarm notifications, Test Project: Emailing Smoke Alarm–Packaging

basic operation of, How Does Email Work?

endianness, Endianness—Typically on the Small Side

ethanol detection, Experiment: Breathalyzer (Alcohol Sensor MQ-303A)

F

FFT (fast Fourier transform), Fast Fourier Transformation

files

creating, Looking Around

displaying contents of, Writing to Files Without an Editor

Linux configuration files, Text Files for Configuration

listing, Looking Around

modifying without an editor, Writing to Files Without an Editor

overwriting, Writing to Files Without an Editor

saving, Looking Around

sticky files, GPIO Without Root

fingerprints

artificially reproducing, Fingerprint Scanner GT-511C3

detecting, Environment Experiment: Revealing Fingerprints

sensors for, Fingerprint Scanner GT-511C3

flame sensors, Experiment: Detecting Flame (Flame Sensor)

FlexiForce

Arduino code/connection, FlexiForce Code and Connection for Arduino

protocol of, Experiment: Feel the Pressure (FlexiForce)

Raspberry Pi code/connection, FlexiForce Code and Connection for Raspberry Pi

floating pins, Pull-Up Resistor

G

gaming consoles, Experiment: Thumb Joystick (Analog Two-Axis Thumb Joystick), Environment Experiment: Salvage Parts from an Xbox Controller, Test Project: Pong

gas sensors (see smoke/gas)

GPIO (General Purpose Input and Output) pins

controlling from CLI, Controlling GPIO Pins from the CLI

in Python, GPIO in Python

non-root privileges, GPIO Without Root

numbering diagram, Two Numbering Systems: Purpose and Location

numbering systems, Two Numbering Systems: Purpose and Location

overcurrent danger, Hello GPIO, Blink an LED

reading state of, Pull-Up Resistor

troubleshooting, Troubleshooting GPIO

versatility of, Connecting Electronics to Raspberry Pi Pins

graphical equalizers, What You’ll Learn

graphing, Solar Panel Monitor Code and Connection for Raspberry Pi

GT-511C3 fingerprint sensor

Arduino code/connection, Fingerprint Sensor Code and Connection for Arduino Mega

benefits of, Fingerprint Scanner GT-511C3

command package, Fingerprint Scanner GT-511C3

fake fingerprints, Fingerprint Scanner GT-511C3

Raspberry Pi code/connection, Fingerprint Sensor Code and Connection for Raspberry Pi

GY65 barometric pressure sensor, Atmospheric Pressure GY65

gyroscopes/gyrocompasses, Acceleration vs. Angular Velocity

H

Hall effect sensors, Experiment: Is It Magnetic?

Hall switches, Experiment: Hall Switch

Haunted Ringing Bell project

Arduino code/connection, Haunted Bell Code and Connection for Arduino

attaching servo to bell, Attaching Servo to Ringing Bell

overview of, Test Project: Haunted Ringing Bell

servo motors, Servo Motors

HC-SR04 ultrasonic sensor

Arduino code/connection, HC-SR04 Code and Connection for Arduino

benefits of, HC-SR04 Ultrasonic Sensor

echo calculations, Echo Calculations Explained

Raspberry Pi code/connection, HC-SR04 Code and Connections for Raspberry Pi

soft objects and, Environment Experiment: Invisible Objects

HDMI, visualizing sound over, What You’ll Learn

header files, Storing Images in Header Files

Hello World (blink test), Hello World

hexadecimal numbering system, Hexadecimal, Binary, and Other Numbering Systems

home pages, Making Your Home Page on Raspberry Pi

humidity sensors, Experiment: Is It Humid in Here?, Soil Sensor Code and Connection for Arduino

hydrocarbon vapor, Smoke and Gas

I

I2C protocol, Experiment: Accelerometer and Gyro Together, SMBus and I2C Without Root, Experiment: Hacking Wii Nunchuk (with I2C), LSM330 Protocol

identity

Ancient Chest project, Test Project: Ancient Chest from the Future–Ancient Chest Code and Connection for Arduino

detection methods, Identity

fingerprint scanners, Fingerprint Scanner GT-511C3–Fingerprint Sensor Code and Connection for Raspberry Pi

keypads, Keypad–Environment Experiment: Revealing Fingerprints

RFID scanners, RFID with ELB149C5M Electronic Brick–RFID Code and Connection for Raspberry Pi

images, Storing Images in Header Files

IMAP servers, How Does Email Work?

IMU (inertial measurement unit), Experiment: Accelerometer and Gyro Together

infrared detectors, Environment Experiment: How to See Infrared

infrared distance sensors, Distance

(see also IR distance sensors)

infrared light, Distance

interrupts, Vibration Code and Connection for Arduino

IP addresses, Finding Your IP Address

ipython tool, sudo Make Me a Sandwich

IR Compound Eye

Arduino code/connection, Compound Eye Code and Connection for Arduino

calibrating, Experiment: Follow Movement with Infrared (IR Compound Eye)

Raspberry Pi alternate circuits, Alternative Circuits for Raspberry Pi

Raspberry Pi code/connection, Compound Eye Code and Connections for Raspberry Pi

SpiDev installation, Installing SpiDev

tracking movement with, Experiment: Follow Movement with Infrared (IR Compound Eye)

IR distance sensors

Arduino code/connections, IR Switch Code and Connections for Arduino

benefits of, Experiment: Detect Obstacles With Infrared (IR Distance Sensor)

Raspberry Pi code/connections, IR Switch Code and Connections for Raspberry Pi

J

joysticks, Experiment: Thumb Joystick (Analog Two-Axis Thumb Joystick)–Environment Experiment: Salvage Parts from an Xbox Controller

K

kernel GPIO driver, Controlling GPIO Pins from the CLI

keypads

Arduino code/connection, Keypad Code and Connection for Arduino

common uses for, Keypad

detecting keypresses, Environment Experiment: Revealing Fingerprints

Raspberry Pi code/connection, Keypad Code and Connection for Raspberry Pi

KY-024 magnet detecting sensor, Experiment: Is It Magnetic?

KY-026 flame sensors, Experiment: Detecting Flame (Flame Sensor)

L

LEDs

lighting with button press, Experiment: Button

lighting/turning off, Light Up the LED

RGB, RGB LED

light

Chameleon Dome project, Test Project: Chameleon Dome–Dome Building Tips

color sensors, Experiment: All the Colors of the ’Bow–Color Sensor Code and Connection for Raspberry Pi

detection methods, Light

determining directionality of, Environment Experiment: One Direction

flame sensors, Experiment: Detecting Flame (Flame Sensor)

line tracking sensors, Experiment: Follow the Line

photoresistors, Experiment: See the Light (Photoresistor, LDR)

light-dependent resistor (LDR), Experiment: See the Light (Photoresistor, LDR)

line tracking sensors, Experiment: Follow the Line

Linux

Arduino setup, Ubuntu Linux

automatic emails in, Python for Email and Social Media

command-line interface (CLI), Feeling at Home in Linux

common commands, Raspberry Pi Linux Quick Reference

configuration files, Text Files for Configuration

file manipulation in, Looking Around

important directories, Raspberry Pi Linux Quick Reference

installation on Raspberry Pi, Raspberry Pi from Zero to First Boot

sudo command, sudo Make Me a Sandwich

system-wide configuration, GPIO Without Root

little endian, Endianness—Typically on the Small Side

LM35 temperature sensor, Experiment: Is It Hot in Here?

ls command, Looking Around

LSM303 compass-accelerometer

Arduino code/connection, LSM303 Code and Connection for Arduino

calibrating, Calibrate Your Module

compass heading calculation, Compass Heading Calculation

orienting north on, Experiment: Magnetic North with LSM303 Compass-Accelerometer

protocol for, LSM330 Protocol

Raspberry Pi code/connection, LSM303 Code and Connection for Raspberry Pi

LXTerminal, Looking Around

M

magnetic field sensors, Experiment: Is It Magnetic?

magnetic north, Experiment: Magnetic North with LSM303 Compass-Accelerometer

magnetism (see electricity/magnetism)

master/slave devices, LSM330 Protocol

mathematical graphing, Solar Panel Monitor Code and Connection for Raspberry Pi

matplotlib library, Solar Panel Monitor Code and Connection for Raspberry Pi

MCP3002 converter, Potentiometer Code and Connection for Raspberry Pi

microcontroller projects

permission for code use, Using Code Examples

microphones, Experiment: Hearing Voices/Volume Level

microswitches, Experiment: Microswitch

motors (see servo motors; vibration motors)

movement

detection methods, Movement

digital vibration sensors, Experiment: Good Vibes with Interrupt (Digital Vibration Sensor)

passive infrared sensor, Experiment: Burglar Alarm! (Passive Infrared Sensor)–Environment Experiment: Cheating an Alarm

Pong game project, Test Project: Pong–Automatic Login

rotary encoders, Experiment: Turn the Knob

thumb joysticks, Experiment: Thumb Joystick (Analog Two-Axis Thumb Joystick)–Environment Experiment: Salvage Parts from an Xbox Controller

tilt ball switches, Experiment: Which Way Is Up? (Tilt Ball Switch)

tracking with IR compound eye, Experiment: Follow Movement with Infrared (IR Compound Eye)

moving average, Moving Average

MPU 6050 sensor

Arduino code/connection, MPU 6050 Code and Connection for Arduino

benefits of, Experiment: Accelerometer and Gyro Together

bitwise operations, Bitwise Operations

numbering systems and, Hexadecimal, Binary, and Other Numbering Systems

Raspberry Pi code/connection, MPU 6050 Code and Connection for Raspberry Pi

MQ sensors

Arduino code/connection, MQ-2 Code and Connection for Arduino

available types, Smoke and Gas

detector placement, Environment Experiment: Smoke Goes Up

MQ-2 smoke sensor, Experiment: Detect Smoke (Analog Gas Sensor)

MQ-3 alcohol sensor, Experiment: Breathalyzer (Alcohol Sensor MQ-303A)

Raspberry Pi code/connection, MQ-2 Code and Connection for Raspberry Pi

MX2125 acceleration sensor, Experiment: Accelerate with MX2125

N

nano text editor, Looking Around

NOOBS*.zip, Extract NOOBS*.zip

number representations, Hexadecimal, Binary, and Other Numbering Systems

O

obstacle detection, Experiment: Detect Obstacles With Infrared (IR Distance Sensor)

P

Parallax PIR, Experiment: Burglar Alarm! (Passive Infrared Sensor)

passive infrared sensors, Distance, Experiment: Burglar Alarm! (Passive Infrared Sensor)–Environment Experiment: Cheating an Alarm, Experiment: Burglar Alarm! (Passive Infrared Sensor)

pentesting, Environment Experiment: Cheating an Alarm

photoresistors, Experiment: See the Light (Photoresistor, LDR)

physical pin header numbers, Two Numbering Systems: Purpose and Location

piezo beeper, Piezo Beeper

pinball machines, Experiment: Which Way Is Up? (Tilt Ball Switch)

Ping sensor

Arduino code/connections, Ping Code and Connections for Arduino

measuring distance with, Experiment: Measure Distance with Ultrasonic Sound (PING)

Raspberry Pi code/connections, Ping Code and Connections for Raspberry Pi

polling, Vibration Code and Connection for Arduino

Pong game

automatic login, Automatic Login

automatic start, Automatically Start Your Game When Raspberry Pi Boots

overview of, Test Project: Pong

packaging, Pong Packaging Tips

Raspberry Pi code/connection, What You’ll Learn

running on login, Run Game on Login

posture alarm

alarm, Alarm, Alarm!

enclosure for, Putting Everything in a Neat Package

overview of, Test Project: Posture Alarm (Arduino)

piezo and IR-sensor combined, Combining Piezo and IR Sensor

piezo beeper, Piezo Beeper

potentiometers

Arduino code/connection, Potentiometer Code and Connection for Arduino

connecting, Experiment: Potentiometer (Variable Resistor, Pot)

diagram of, Experiment: Potentiometer (Variable Resistor, Pot)

in joysticks, Experiment: Thumb Joystick (Analog Two-Axis Thumb Joystick)

Raspberry Pi code/connection, Potentiometer Code and Connection for Raspberry Pi

programs

installing, sudo Make Me a Sandwich

recognizing command prompts, sudo Make Me a Sandwich

protocols

for capacitive touch sensors, Experiment: Sense Touch Without Touch (Capacitive Touch Sensor QT113)

for FlexiForce sensor, Experiment: Feel the Pressure (FlexiForce)

for LSM303 compass-accelerometer, LSM330 Protocol

for MPU 6050, Experiment: Accelerometer and Gyro Together

for QT113, Experiment: Sense Touch Without Touch (Capacitive Touch Sensor QT113)

for Wii Nunchuk controller, Experiment: Hacking Wii Nunchuk (with I2C)

I2C, Experiment: Accelerometer and Gyro Together, Experiment: Accelerometer and Gyro Together, Experiment: Hacking Wii Nunchuk (with I2C), LSM330 Protocol

industry standard, Experiment: Accelerometer and Gyro Together

overview of, Protocols

SPI, Installing SpiDev, Experiment: Accelerometer and Gyro Together

Wiegand, RFID with ELB149C5M Electronic Brick

proximity, detection of, Distance

pull-up resistors, Pull-Up Resistor

pulse width modulation (PWM), RGB LED Shows Any Color

purpose-based pin numbering, Two Numbering Systems: Purpose and Location

pushbuttons, Experiment: Button

pwd command, Looking Around

pyGame library, Test Project: Pong

Python

automatic emails, Python for Email and Social Media

GPIO in, GPIO in Python

ipython tool, sudo Make Me a Sandwich

matplotlib library, Solar Panel Monitor Code and Connection for Raspberry Pi

Python console, Hexadecimal, Binary, and Other Numbering Systems

python-smbus library, Experiment: Accelerometer and Gyro Together, SMBus and I2C Without Root

Q

QT113 capacitive touch sensor

alternatives to, Experiment: Build Your Own Touch Sensor

Arduino code/connection, QT113 Code and Connection for Arduino

protocol for, Experiment: Sense Touch Without Touch (Capacitive Touch Sensor QT113)

Raspberry Pi code/connection, QT113 Code and Connection for Raspberry Pi

R

random noise, Moving Average

range finders, Distance

Raspberry Pi

basic set up, Raspberry Pi

booting, Boot and Install Raspbian

cable connection, Connect Cables

code/connection information

AttoPilot Compact DC sensor, AttoPilot Code and Connection for Raspberry Pi

burglar alarms, Burglar Alarm Code and Connection for Raspberry Pi

buttons, Code and Connection for Raspberry Pi

capacity sensor, Capsense Code and Connection for Raspberry Pi

color sensors, Color Sensor Code and Connection for Raspberry Pi

DHT11 humidity sensor, DHT11 Code and Connection for Raspberry Pi

ELB149C5M sensor, RFID Code and Connection for Raspberry Pi

flame sensors, Flame Sensor Code and Connection for Raspberry Pi

FlexiForce sensor, FlexiForce Code and Connection for Raspberry Pi

GT-511Cs sensor, Fingerprint Sensor Code and Connection for Raspberry Pi

Hall effect sensors, Hall Effect Sensor Code and Connection for Raspberry Pi

Hall switch, Hall Switch Code and Connection for Raspberry Pi

HC-SR04 sensor, HC-SR04 Code and Connections for Raspberry Pi

IR Compound Eye, Compound Eye Code and Connections for Raspberry Pi, Alternative Circuits for Raspberry Pi

IR distance sensor, IR Switch Code and Connections for Raspberry Pi

joysticks, Joystick Code and Connection for Raspberry Pi

keypads, Keypad Code and Connection for Raspberry Pi

LDR photoresistor, LDR Code and Connection for Raspberry Pi

line sensors, Line Sensor Code and Connection for Raspberry Pi

LM35 temperature sensor, LM35 Code and Connection for Raspberry Pi

LSM303 compass-accelerometer, LSM303 Code and Connection for Raspberry Pi

microphone breakout boards, Microphone Breakout Code and Connection for Raspberry Pi

microswitches, Microswitch Code and Connection for Raspberry Pi

MPU 6050 sensor, MPU 6050 Code and Connection for Raspberry Pi

MQ-2 sensor, MQ-2 Code and Connection for Raspberry Pi

MQ-3 sensor, Experiment: Breathalyzer (Alcohol Sensor MQ-303A)

MX2125 accelerometer, Accelerometer Code and Connection for Raspberry Pi

Ping sensor, Ping Code and Connections for Raspberry Pi

Pong game, What You’ll Learn

potentiometers, Potentiometer Code and Connection for Raspberry Pi

QT113 sensor, QT113 Code and Connection for Raspberry Pi

rotary encoders, Rotary Encoder Code and Connection for Raspberry Pi

soil humidity sensor, Soil Sensor Code and Connection for Raspberry Pi

solar panel monitor, Solar Panel Monitor Code and Connection for Raspberry Pi

sound visualizers, Visualizer Code and Connection for Raspberry Pi

tilt sensor, Tilt Sensor Code and Connection for Raspberry Pi

vibration sensor, Vibration Code and Connection for Raspberry Pi

Wii controller, Nunchuk Code and Connection for Raspberry Pi

communication with Arduino, Talking to Arduino from Raspberry Pi

connecting electronics to, Connecting Electronics to Raspberry Pi Pins

enabling serial port in, Enabling the Serial Port in Raspberry Pi

GPIO pin numbering, Two Numbering Systems: Purpose and Location

Linux installation, Raspberry Pi from Zero to First Boot

making home page on, Making Your Home Page on Raspberry Pi

model recommendation, Raspberry Pi

SD card formatting, Extract NOOBS*.zip

sending email from, Python for Email and Social Media

shutting down, sudo Make Me a Sandwich

troubleshooting installation, Troubleshooting Your Raspberry Pi Installation

using as a web server, Turn Raspberry Pi into Web Server

using Linux operating system, Feeling at Home in Linux

Raspbian

installing, Boot and Install Raspbian

software installation to, SMBus and I2C Without Root

redirection operator (>), Writing to Files Without an Editor

resistors

identifying, Troubleshooting

photoresistors, Experiment: See the Light (Photoresistor, LDR)

pull-up, Pull-Up Resistor

sensitivity, Environment Experiment: Flame Precision

variable, Experiment: Potentiometer (Variable Resistor, Pot)

RFID (radio frequency identification)

benefits of, Identity, RFID with ELB149C5M Electronic Brick

ELB149C5M Electronic Brick, RFID with ELB149C5M Electronic Brick

Robot Hand Controlled by Wii Nunchuk project

adding hand mechanics, Adding Hand Mechanics

overview of, Test Project: Robot Hand Controlled by Wii Nunchuk

root users, sudo Make Me a Sandwich

rotary encoders, Experiment: Turn the Knob

S

ScrewShield, Shields Make It Easy and Robust

scripts, Command-Line Interface is Everywhere, Forever

SD card formatting, Extract NOOBS*.zip

self-balancing devices, Acceleration vs. Angular Velocity

sensitivity resistors, Environment Experiment: Flame Precision

sensors

active infrared distance, Distance

Analog 2-axis Thumb Joystick, Experiment: Thumb Joystick (Analog Two-Axis Thumb Joystick)

AttoPilot Compact DC Voltage/Current Sense, Experiment: Voltage and Current

barometric pressure sensors, Atmospheric Pressure GY65

color, Experiment: All the Colors of the ’Bow–Color Sensor Code and Connection for Raspberry Pi

digital vibration sensors, Experiment: Good Vibes with Interrupt (Digital Vibration Sensor)

ELB149C5M, RFID with ELB149C5M Electronic Brick–RFID Code and Connection for Raspberry Pi

fingerprint scanners, Fingerprint Scanner GT-511C3–Fingerprint Sensor Code and Connection for Raspberry Pi

FlexiForce, Experiment: Feel the Pressure (FlexiForce)

Hall effect, Experiment: Is It Magnetic?

humidity, Experiment: Is It Humid in Here?

IR distance, Experiment: Detect Obstacles With Infrared (IR Distance Sensor)

KY-026 flame sensors, Experiment: Detecting Flame (Flame Sensor)

line tracking, Experiment: Follow the Line

MPU 6050 sensor, Experiment: Accelerometer and Gyro Together–Endianness—Typically on the Small Side

MQ sensors, Smoke and Gas

MX2125, Experiment: Accelerate with MX2125

Parallax PIR, Experiment: Burglar Alarm! (Passive Infrared Sensor)

passive infrared, Distance, Experiment: Burglar Alarm! (Passive Infrared Sensor)–Environment Experiment: Cheating an Alarm

Ping, Experiment: Measure Distance with Ultrasonic Sound (PING)

QT113, QT113 Code and Connection for Arduino

salvaging from game consoles, Environment Experiment: Salvage Parts from an Xbox Controller

soil humidity, Experiment: Does Your Plant Need Watering? (Build a Soil Humidity Sensor)

sound, Environment Experiment: Can You Hear a Pin Drop?

temperature, Experiment: Is It Hot in Here?

tilt sensors, Experiment: Which Way Is Up? (Tilt Ball Switch)

ultrasonic, HC-SR04 Ultrasonic Sensor

separation of user privileges, sudo Make Me a Sandwich

servo motors

basic operation, Servo Motors

benefits of, Servo Motors

finding servo range, Finding Servo Range

Servo.h library, Finding Servo Range

shell, Command-Line Interface is Everywhere, Forever

shell commands, Looking Around

shields, Shields Make It Easy and Robust

smoke/gas

alcohol detection, Experiment: Breathalyzer (Alcohol Sensor MQ-303A)

analog gas sensor, Experiment: Detect Smoke (Analog Gas Sensor)

detector placement, Environment Experiment: Smoke Goes Up

emailing alarms, Test Project: Emailing Smoke Alarm–Packaging

MQ sensors for, Smoke and Gas

SMTP servers, How Does Email Work?

social media, Python for Email and Social Media

soil humidity sensors, Experiment: Does Your Plant Need Watering? (Build a Soil Humidity Sensor)

Solar Cell Web Monitor project, What You’ll Learn–Timed Tasks with Cron

sound

analysis and measurement of, Sound

detecting volume level, Experiment: Hearing Voices/Volume Level

sensor sensitivity, Environment Experiment: Can You Hear a Pin Drop?

visualize sound over HDMI, What You’ll Learn

speedometers, Experiment: Is It Magnetic?, Experiment: Hall Switch

SPI protocol, Installing SpiDev, Experiment: Accelerometer and Gyro Together

SpiDev library, Installing SpiDev

squeeze pressure, Experiment: Feel the Pressure (FlexiForce)

sticky files, GPIO Without Root

sudo command, sudo Make Me a Sandwich, Light Up the LED

super users, sudo Make Me a Sandwich

T

tab key, sudo Make Me a Sandwich

tasks, performing timed, Timed Tasks with Cron

temperature sensors, Experiment: Is It Hot in Here?

teslas, Electricity and Magnetism

text, printing to terminal, Writing to Files Without an Editor

thumb joysticks, Experiment: Thumb Joystick (Analog Two-Axis Thumb Joystick)–Environment Experiment: Salvage Parts from an Xbox Controller

tilt ball switches, Experiment: Which Way Is Up? (Tilt Ball Switch)

timed tasks, Timed Tasks with Cron

touch

buttons, Experiment: Button

detection methods, Touch

microswitches, Experiment: Microswitch

potentiometers, Experiment: Potentiometer (Variable Resistor, Pot)

QT113 capacitive touch sensor, Experiment: Sense Touch Without Touch (Capacitive Touch Sensor QT113)

ringing bell project, Test Project: Haunted Ringing Bell–Attaching Servo to Ringing Bell

sensing squeeze pressure, Experiment: Feel the Pressure (FlexiForce)

sensing through solid objects, Environment Experiment: Sensing Touch Through Wood

troubleshooting

electronics connection, Troubleshooting

GPIO, Troubleshooting GPIO

GPIO in Python, Troubleshooting

GPIO pin overcurrent, Hello GPIO, Blink an LED

Raspberry Pi installation, Troubleshooting Your Raspberry Pi Installation

sudo command, sudo Make Me a Sandwich, Light Up the LED

TTL level, HC-SR04 Code and Connections for Raspberry Pi

U

Ubuntu, Ubuntu Linux

udev, GPIO Without Root

ugly key, Ubuntu Linux

ultrasonic distance sensor, HC-SR04 Ultrasonic Sensor–Environment Experiment: Invisible Objects

ultrasonic sound (PING), Distance, Experiment: Measure Distance with Ultrasonic Sound (PING), HC-SR04 Ultrasonic Sensor

user home pages, Making Your Home Page on Raspberry Pi

user privileges, sudo Make Me a Sandwich

V

variable resistors, Experiment: Potentiometer (Variable Resistor, Pot)

velocity, angular, Acceleration vs. Angular Velocity

vibration motors, Environment Experiment: Salvage Parts from an Xbox Controller

vibration sensors, Experiment: Good Vibes with Interrupt (Digital Vibration Sensor)

videogame consoles, Experiment: Thumb Joystick (Analog Two-Axis Thumb Joystick), Test Project: Pong

voice detection, Experiment: Hearing Voices/Volume Level

(see also sound)

voltage sensors, Experiment: Voltage and Current

volume, Experiment: Hearing Voices/Volume Level

(see also sound)

W

weather/climate

atmospheric pressure sensors, Atmospheric Pressure GY65–GY65 Code and Connection for Raspberry Pi

e-paper weather forecast project, Test Project: E-paper Weather Forecast–Enclosure Tips

humidity sensors, Experiment: Is It Humid in Here?–Talking to Arduino from Raspberry Pi

soil humidity sensors, Experiment: Does Your Plant Need Watering? (Build a Soil Humidity Sensor)

temperature sensors, Experiment: Is It Hot in Here?

weighted moving average, Moving Average

Wii Nunchuk controller

Arduino code/connection, Nunchuk Code and Connection for Arduino

I2C protocol base, Experiment: Hacking Wii Nunchuk (with I2C)

Raspberry Pi code/connection, Nunchuk Code and Connection for Raspberry Pi

Windows 7/8, Windows 7 and Windows 8

Windows key, Ubuntu Linux

working directory

listing files in, Looking Around

printing, Looking Around