Getting started with ArduinoHands-on Workshop

Sudar Muthuhttp://hardwarefun.com

@hardwarefun

What is an Arduino?

Photo credit: Arduino team

Types of Arduino

• Leonardo, Uno (and older ones)• Yun (Includes a Linux Kernel)• Due (32-bit)• Mega (more input pins)• Arduino BT (includes Bluetooth)• LilyPad (wearable)• Arduino Pro• ADK (supports Android ADK)• Clones (around 300+)

Arduino Shields

http://shieldlist.org/

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Breadboard Basics

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• The first two and the last two rows are connected

• In all the other rows, columns are connected• Connect the first and last row to power• Connect the second and second last row to

ground

How to use a breadboard

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Powering Up Arduino

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• Using USB cable• Using DC power jacket• Giving voltage directly into Vin pin• Giving regulated voltage directly into 5V pin

Different ways to power up Arduino

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Setting Up Arduino

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Testing The Setup With A “Hello World” Program

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Blinking LED

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• Insert a LED in pin 13• Open File->Examples->Basics->Blink• Select Tools->Boards->Arduino Uno• Select File->Upload (or press ctrl+u)• You should get the message “Done upload”• Your Led should blink• Congrats you can program Arduino now

Making a LED blink

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Anatomy Of An Arduino Sketch

Things you can try

• Vary the frequency at which the LED is blinking

• Add more LED’s

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• Uno has one UART hardware port, using which we can exchange information with computer

• Very useful for debugging• Works at a specified baud rate• Use Serial Monitor to read values (Tools ->

Serial Monitor)• SoftwareSerial is also available

Printing values through Serial

Reading values from Serial

serial.read()serial.print()

serial.println()

https://github.com/sudar/arduino-sketches/blob/master/SerialPrint/SerialPrint.ino

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Digital Input And Output

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Digital Input

Code

Open File->Examples->Basics->DigitalReadSerial

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The LED blink that we did at “setting up Arduino” is Digital output

Digital Output

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Analog Input

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• Connect the LDR on pin A0 and Gnd• LDR’s resistance varies based on the amount

of light present• Read the current value using analogRead()• Print the value in Serial Monitor

Reading Analog values from sensors

Code

Open File->Examples->Basics->AnalogReadSerial

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Analog Output

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• What is PWM?• Analog like behavior using digital output• Works by switching the LED on and off

regularly• Changing the brightness of a Led

Analog Output

Code

Open File->Examples->Analog->Fading

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Combining Input and Output

Control an LED based on lightvoid setup(){ pinMode(13, OUTPUT);}

void loop(){ int val = analogRead(A0); if (val > 50) { digitalWrite(13, HIGH); } else { digitalWrite(13, LOW); }}

Things to try

• Control LED based on button press• Alternate two LED’s based on button press• Persist the status of button

Moving Forward

• Connect to display devices like 7-segment display or LCD

• Connect to motion sensors• Connect to other components like shift

register etc• Connect to a RTC chip

Things which I have tried• Connecting to mobile Android phones using

– Bluetooth– Wired and wireless– Audio Jacket– NFC– ADK

• Connected all sorts of display devices including VGA devices like projectors• Connected external USB devices like keyboard, mouse and even USB Missile launchers -

http://hardwarefun.com/tutorials/controlling-usb-missile-launchers-using-arduino• Connected ez430 chronos watch• Connected IR devices like TV Remotes etc• Connected bluetooth devices like WiiRemote• Created small autonomous bots that can be controlled by either a WiiRemote or Android

phones - http://hardwarefun.com/projects/asimi• Detect motion using PIR, IR and ultrasound motion sensors• More projects at http://hardwarefun.com