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  • Book Overview & Buying Raspberry Pi Sensors
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Raspberry Pi Sensors

Raspberry Pi Sensors

By : Rushi Gajjar
4.4 (9)
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Raspberry Pi Sensors

Raspberry Pi Sensors

4.4 (9)
By: Rushi Gajjar
Buy this Book

Overview of this book

This book is perfect for hardware enthusiasts who want to develop amazing projects using Raspberry Pi. Some knowledge and experience working with Linux, C, and Python is a plus, but once you're set up to go, you'll be ready to push the creative capabilities of your Raspberry Pi even further.
Table of Contents (10 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Reader feedback
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Customer support
Free Chapter
1
1. Meeting Your Buddy – the Raspberry Pi
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1. Meeting Your Buddy – the Raspberry Pi
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A glance at the Raspberry Pi board
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Setting up for the first time
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Connecting the Raspberry Pi to the Internet
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A crash course on Linux
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Installing useful libraries
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python-gpio
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Be ready with Python and C
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Practice makes you perfect
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Summary
2
2. Meeting the World of Electronics
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2. Meeting the World of Electronics
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Basic terminologies of electronics
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Communication protocols
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Useful tips and precautions
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Understanding the GPIO port
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It's time to glow LEDs!
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Summary
3
3. Measuring Distance Using Ultrasonic Sensors
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3. Measuring Distance Using Ultrasonic Sensors
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The mysterious ultrasonic sensor
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Building the project!
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Fixing common problems
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A wearable device for the visually impaired
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Summary
4
4. Monitoring the Atmosphere Using Sensors
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4. Monitoring the Atmosphere Using Sensors
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Sensor selection process
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InsideDHT – temperature and humidity sensors
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Introducing the photoresistor (photocell)
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Building the project
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Putting all the parts together
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Troubleshooting common problems
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Summary
5
5. Using an ADC to Interface any Analog Sensor with the Raspberry Pi
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5. Using an ADC to Interface any Analog Sensor with the Raspberry Pi
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Analog-to-digital convertors
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MCP3008 for analog-to-digital conversion
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Making your own sensor station
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Generic software preparation
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Using your sensor station – make a temperature logger
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Summary
6
6. Uploading Data Online – Spreadsheets, Mobile, and E-mails
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6. Uploading Data Online – Spreadsheets, Mobile, and E-mails
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Internet of Things
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Hardware setup
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Synchronizing the clock with the Internet
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Uploading data on Google spreadsheets
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Getting notified by e-mails
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Integrating everything
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Common problems faced
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Summary
7
7. Creating an Image Sensor Using a Camera and OpenCV
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7. Creating an Image Sensor Using a Camera and OpenCV
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Image processing
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OpenCV
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Camera interfacing with the RasPi
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Live streaming using a network camera
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Porting OpenCV
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Create a motion detector
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Amazing projects for you
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Summary
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A. Shopping List
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Basic requirements
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Sensors
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Integrated chips
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Components
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Others
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Index
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Index

Building the project!

It's now time to connect the ultrasonic sensor with the RasPi board. The ultrasonic sensor works on a 5V power supply. Fortunately, we have the 5V supply pin on the RasPi board. We can provide the 5V supply from RasPi to the ultrasonic sensor. However, in reply, the ultrasonic sensor generates a 5V echo signal as an output to RasPi.

Tip

It is always recommended that you connect the ground terminals of the devices first and then the voltage supply terminals. This should be followed with almost all the electronic devices we connect with development boards such as RasPi.

As you have read in Chapter 2, Meeting the World of Electronics, we know that our RasPi needs the 3.3V level on the GPIO pins to operate safely. So, how do we connect them? It is a serious matter. In this regard, Kirchhoff will help us. With the help of Kirchhoff's current and voltage laws, we can divide the voltage into two parts. If we divide the 5V supply into 3.3V and 1.7V, we can use the echo...

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