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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

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
Preface
What this book covers
What you need for this book
Who this book is for
Conventions
Reader feedback
Customer support
Free Chapter
1
1. Meeting Your Buddy – the Raspberry Pi
1. Meeting Your Buddy – the Raspberry Pi
A glance at the Raspberry Pi board
Setting up for the first time
Connecting the Raspberry Pi to the Internet
A crash course on Linux
Installing useful libraries
python-gpio
Be ready with Python and C
Practice makes you perfect
Summary
2
2. Meeting the World of Electronics
2. Meeting the World of Electronics
Basic terminologies of electronics
Communication protocols
Useful tips and precautions
Understanding the GPIO port
It's time to glow LEDs!
Summary
3
3. Measuring Distance Using Ultrasonic Sensors
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3. Measuring Distance Using Ultrasonic Sensors
The mysterious ultrasonic sensor
Building the project!
Fixing common problems
A wearable device for the visually impaired
Summary
4
4. Monitoring the Atmosphere Using Sensors
4. Monitoring the Atmosphere Using Sensors
Sensor selection process
InsideDHT – temperature and humidity sensors
Introducing the photoresistor (photocell)
Building the project
Putting all the parts together
Troubleshooting common problems
Summary
5
5. Using an ADC to Interface any Analog Sensor with the Raspberry Pi
5. Using an ADC to Interface any Analog Sensor with the Raspberry Pi
Analog-to-digital convertors
MCP3008 for analog-to-digital conversion
Making your own sensor station
Generic software preparation
Using your sensor station – make a temperature logger
Summary
6
6. Uploading Data Online – Spreadsheets, Mobile, and E-mails
6. Uploading Data Online – Spreadsheets, Mobile, and E-mails
Internet of Things
Hardware setup
Synchronizing the clock with the Internet
Uploading data on Google spreadsheets
Getting notified by e-mails
Integrating everything
Common problems faced
Summary
7
7. Creating an Image Sensor Using a Camera and OpenCV
7. Creating an Image Sensor Using a Camera and OpenCV
Image processing
OpenCV
Camera interfacing with the RasPi
Live streaming using a network camera
Porting OpenCV
Create a motion detector
Amazing projects for you
Summary
8
A. Shopping List
Basic requirements
Sensors
Integrated chips
Components
Others
9
Index
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...

End of Section 3
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