ARDUINO FOR BEGINNERS Smitha Pisupati and Sushma Rao Apr 26 2015 - - PowerPoint PPT Presentation

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ARDUINO FOR BEGINNERS Smitha Pisupati and Sushma Rao Apr 26 2015 - - PowerPoint PPT Presentation

Apr 04, 2024 217 likes •714 views

ARDUINO FOR BEGINNERS Smitha Pisupati and Sushma Rao Apr 26 2015 What is Arduino An open source electronics platform Easy to use HW and SW Make interactive projects No electronics background required The HW Arduino

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ARDUINO FOR BEGINNERS

Smitha Pisupati and Sushma Rao Apr 26 2015

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What is Arduino

¨ An open source electronics platform ¨ Easy to use HW and SW ¨ Make interactive projects ¨ No electronics background required

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The HW – Arduino UNO

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The Hardware

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The Software

Download: http://arduino.cc/en/Main/Software

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Blink an LED

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Blink an LED

¨ Connect the Arduino to the PC/Mac ¨ Open the Blink example

File -> Examples -> 01.Basics -> Blink

¨ Upload!

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Let’s look at the code

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Hey Arduino, Run this part when you power up! Hey Arduino, Run this part over and over, forever!

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Set Pin 13 to

  • utput

Set Pin 13 to HIGH Set Pin 13 to LOW Wait 1 second Wait 1 second

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Digital Output

Connect an External LED

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Breadboard

http://www.crifan.com/arduino_and_bread_board/

Connections in the breadboard Breadboard Internals

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External LED

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What makes the LED glow?

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Electricity!

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Electricity!

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Resistor

¨ Limits amount of charge flowing through the circuit ¨ Has a “resistance” ¨ Higher the resistance,

lower the amount of charge flow

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Schematic

¨ Circuit diagram ¨ Uses symbols for electronic components

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Analog Sensor

Control the Blink Rate

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Meet the Potentiometer

¨ A.K.A The Pot ¨ Variable resistor

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How does it work?

¨ Voltage divider ¨ Voltage at A0 is

a fraction of 5V DC

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Adding a potentiometer

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Changes to Blink code

¨ In the loop function, add the following line:

int delayVal = analogRead(A0);

¨ Change delay(1000) to the following:

delay(delayVal); // delayVal will be a number between 0 and 1023.

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Adding serial debug

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Add Serial Debug

¨ Add the following line to the setup() function

Serial. Serial.begin(9600);

¨ Add the following line to the loop() function

Serial.println(delayVal);

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Serial Monitor

¨

More details at http://www.arduino.cc/en/Reference/Serial

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Digital Sensor

Ultrasonic Distance Sensor

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Ultrasonic distance sensor

¨ 4 pins

¤ VCC ¤ GND ¤ Trigger ¤ Echo

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Reading Values from the Sensor

¨

Add the following at the top of the file

unsigned long distanceInCm = 0;

¨

Add the following lines of code in the setup() function

pinMode (trigger, OUTPUT); pinMode(echo, INPUT);

¨

Add the following in the loop() function

// Hold trigger pin high for 10 microseconds digitalWrite(trigger, HIGH); delayMicroseconds(10); digitalWrite(trigger, LOW); // Get the width of the pulse with pulseIn count = pulseIn(echo, HIGH); // get distance in cm. Divide by 148 for inches distanceInCm = count / 58;

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Glowing the LED

¨ Add the following at the top of the file

int ledPin = 13;

¨ Add the following lines of code in the setup() function

pinMode(ledPin, OUTPUT);

¨ Add the following in the loop() function

if(distanceInCm < 10) { digitalWrite(ledPin, HIGH); } else { digitalWrite(ledPin, LOW); }

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Finally…

¨ Add the following at the end of the

loop

count = 0; // add a delay for stable behaviour delay(200);

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Building the Theremin

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Let’s Code It

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Repeat the LED code 6 more times

¨ Add the following at the top of the file

int ledPin1 = 13; int ledPin2 = 12; int ledPin3 = 11; …

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Repeat the LED code 6 more times

¨ Add the following lines of code in the setup()

function

pinMode(ledPin1, OUTPUT); pinMode(ledPin2, OUTPUT); pinMode(ledPin3, OUTPUT); …

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Repeat the LED code 6 more times

¨ Add the following in the loop() function

if(distanceInCm < 10) { digitalWrite(ledPin1, HIGH); digitalWrite(ledPin2, HIGH); digitalWrite(ledPin3, HIGH); … } else { digitalWrite(ledPin1, LOW); digitalWrite(ledPin2, LOW); digitalWrite(ledPin3, LOW); … }

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Test It!

¨ Upload and check that this works…

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Adding an else-if

if(distanceInCm < 10) { digitalWrite(ledPin1, HIGH); … } else if (distanceInCm < 12) { digitalWrite(ledPin1, HIGH); digitalWrite(ledPin2, LOW); digitalWrite(ledPin3, LOW); … } else { digitalWrite(ledPin1, LOW); … }

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Notes to play

¨ link to source ¨ Copy the top part of the file that looks like this:

#define NOTE_B0 31 #define NOTE_C1 33 #define NOTE_CS1 35 #define NOTE_D1 37 #define NOTE_DS1 39 #define NOTE_E1 41 #define NOTE_F1 44 #define NOTE_FS1 46 #define NOTE_G1 49

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Adding the tone

¨ Connect the Piezo buzzer at pin 5 ¨ Add this line to the top of the file

int piezo = 5;

¨ Add this to the setup() function

pinMode(piezo, OUTPUT);

¨ Add this to the loop() function

// To play the tone tone(piezo,<NOTE>); // to stop the tone noTone(piezo);

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Make Music!

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References

¨ http://www.arduino.cc/en/Reference/Tone ¨ http://www.arduino.cc/en/Tutorial/HomePage