Nirmala Venkat at 06:51, 20 February 2017

2017-02-20T06:51:01Z

Nirmala Venkat: Created page with "'''Title of script''':''' Display counter using Arduino''' '''Author:''' Manivel and Nirmala Venkat '''Keywords:''' Arduino UNO board, Arduino IDE, Compile and upload, LCD,..."

2017-02-20T06:50:12Z

Created page with "'''Title of script''':''' Display counter using Arduino''' '''Author:''' Manivel and Nirmala Venkat '''Keywords:''' Arduino UNO board, Arduino IDE, Compile and upload, LCD,..."

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'''Title of script''':''' Display counter using Arduino'''

'''Author:''' Manivel and Nirmala Venkat

'''Keywords:''' Arduino UNO board, Arduino IDE, Compile and upload, LCD, Push button, counter using Arduino, Video tutorials

{| style="border-spacing:0;"
| style="background-color:#c0c0c0;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| '''Visual Cue'''
| style="background-color:#c0c0c0;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| '''Narration'''

|-
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Slide 1:

| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Welcome to the''' Spoken Tutorial''' on''' Display counter using Arduino.'''

|-
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Slide 2:

Learning objectives

| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| In this tutorial, we will learn to:

* Connect an''' LCD''' and a '''Push button''' to''' Arduino''' board and
* Write a program to increase the count whenever the '''pushbutton''' is pressed'''.'''

|-
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Slide 3:

Pre-requisites

| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| To follow this tutorial, you should have:

* Basic knowledge of''' Electronics '''and
* Basic knowledge of''' C''' or''' C++''' programming language

|-
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Slide 4:

System Requirement

| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| To record this tutorial, I am using:

* '''Arduino UNO Board'''
* '''Ubuntu Linux 14.04''' operating system and
* '''Arduino IDE'''

|-
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Show the circuit diagram
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| In an earlier tutorial in this series, we had created a circuit using '''Arduino''' and '''LCD'''.

We will use the same '''circuit''' in this tutorial.

|-
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Show the circuit diagram from the video 0:05
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Here, we will add a '''pushbutton''' and make a simple counter.

We have already learnt about the working of pushbutton in an earlier tutorial.

|-
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"|
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Now let us learn the connection circuit details.

|-
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"|
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| A '''pushbutton '''is connected to a '''100 ohm resistor.'''

The''' pushbutton''' is connected to '''pin '''number''' 7 '''and a '''100 ohm resistor''' is connected to the '''ground'''.

All other connections are exactly the same as in our previous experiment.

|-
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"|
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| This is the live setup of the connection, as shown in the circuit diagram.

|-
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Switch to Arduino IDE
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Now we will write a program in the '''Arduino IDE.'''

So let’s switch to the '''Arduino IDE'''.

|-
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| In the '''menu''' bar, click '''Sketch''' and '''Include Library.'''

Then select '''LiquidCrystal.'''
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| First, we need to include the '''Liquid crystal library.'''

|-
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Type LiquidCrystal lcd(12,11,5,4,3,2)
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Type the code as shown.

I have initialized a variable '''lcd '''of type''' LiquidCrystal. '''

Here, '''pin '''number''' 12''' is initialized as '''Register''' '''Select '''and '''pin '''number''' 11''' as '''Enable.'''

The next 4 parameters represent '''data lines''' of '''LCD.'''

|-
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Type,

lcd.begin(16,2);
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| In the '''void setup function''', type '''lcd.begin 16 comma 2 '''as shown.

This command initializes the '''LCD''' with rows and columns.

|-
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Type,

pinMode(pbutton, INPUT);

Type,

int pbutton=7;
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Next we will setup the '''pin '''number''' 7''' as '''INPUT'''.

Type the code as shown.

In another way, we can store the '''pin''' number in a variable '''pbutton.'''

Let us define the '''pbutton '''variable as shown.

|-
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Point to Void loop

| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Now we will write the code for '''void loop.'''

Whenever the '''pushbutton''' is pressed, one count is increased on the '''LCD'''.

|-
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Highlight,

if (digitalRead(pbutton)==HIGH)
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| We will write a simple '''if statement''' to check whether the '''pushbutton''' is pressed or not.

|-
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Type,

if (digitalRead(pbutton)==HIGH){

lcd.setcursor(0,0);

lcd.print (“button pressed”);

}
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Before displaying the count, let us check the status of the button.

This command will set the cursor position in the '''LCD'''.

'''lcd.print''' will print the message.

|-
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Click on compile and upload button on the tool bar
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| We will now '''compile''' and '''upload''' the program.

Now, I will press the '''pushbutton'''.

|-
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Point to the output

| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Here we see the message '''“button pressed”''' in the '''LCD'''.

It shows that the '''pushbutton''' is working successfully.

<pause>

|-
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"|
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Next we will modify the program to set a '''counter'''.

|-
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Type

int count=0;
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| We need a variable for counter.

Now, we will initialize the variable '''count''' to '''zero'''.
|-
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Modify the print statement as,

lcd.print(count++);
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Modify the '''print''' statement as shown here.

'''count++ '''will increase the count by one, each time the button is pressed.

|-
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Click on compile and upload button on the tool bar
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Let us now '''compile''' and '''upload''' the program.

|-
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Press the push button.
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Now, I will press the '''pushbutton'''.

|-
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"|

| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| It didn't work as expected.

We see a different count displayed here.

Why is this so?

|-
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Point to the output
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| This is because we specified the status for button pressed.

But we didn't mention the status for button released.

The output shows the incremented number based on the button pressed time.

|-
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Type,

'''while(digitalRead(pbutton)==HIGH);'''

| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| So, we will write a '''while statement,''' as shown here.

This will display the count when the '''pushbutton''' is in pressed state.

That means the '''pin 7''' is in '''HIGH''' mode.

When you release the button, the state is '''LOW''' and it will come out of the '''while''' '''loop'''.

|-
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Highlight the program line by line
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Let me explain the program.

The program starts with initialization of the '''LCD'''.

We have the variable '''pbutton '''and''' count.'''

Inside the '''void setup function''', we have initialized the '''LCD''' with 16 columns and 2 rows.

Then the '''pinMode''' is input for the '''pin '''number''' 7'''.

In the''' void loop function''', we are checking the condition whether the '''pushbutton''' is '''HIGH''' or not.

When the '''pushbutton''' is pressed, the cursor is set to position zero comma zero.

The '''lcd.print statement '''will print the count value.

Initially '''count''' is zero. '''Count plus plus''' would be 1.

When the button is released, it will break the '''while''' '''loop''' and come out of the loop.

Again, if you press the button, the next iteration begins and it increases the count.

|-
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Click on compile and upload button on the tool bar
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Let us '''compile''' and '''upload''' the program.

|-
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Show the output.

| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Now I'll press the button once and release it.

|-
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"|
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Again I'll press and release the button.

You can see that the count is increased whenever the button is pressed.

|-
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"|
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| This brings us to the end of this tutorial. Let us summarize.

|-
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Slide 11:

Summary
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| In this tutorial, we learnt to:

* Connect an''' LCD''' and '''pushbutton''' to''' Arduino''' board and
* Write a program to display the count''' '''whenever the pushbutton is pressed.

|-
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Slide 12:

Assignment
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Do the following assignment.

* Change the same program to display the count as 2,4,6 and so on.
* '''Compile''' and '''upload''' the program and
* Observe the count displayed in the '''LCD'''.

|-
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Slide 13:

About Spoken Tutorial project

| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| The video at the following link summarizes the Spoken Tutorial project.

Please download and watch it.

|-
| style="background-color:#ffffff;border-top:1pt solid #000001;border-bottom:0.75pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Slide 14:

Spoken Tutorial workshops
| style="background-color:#ffffff;border-top:1pt solid #000001;border-bottom:0.75pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| The''' Spoken Tutorial Project''' Team:

* conducts workshops and
* gives certificates.

For more details, please write to us.

|-
| style="background-color:#ffffff;border:0.75pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.092cm;padding-right:0.191cm;"| Slide 15:

Forum for specific questions
| style="background-color:#ffffff;border:0.75pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.092cm;padding-right:0.191cm;"| Please post your timed queries in this forum.

|-
| style="background-color:#ffffff;border-top:0.75pt solid #000001;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Slide 16:

Acknowledgement

| style="background-color:#ffffff;border-top:0.75pt solid #000001;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Spoken Tutorial project is funded by NMEICT, MHRD, Government of India.

More information on this mission is available at
this link.

|-
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"|
| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| This tutorial has been contributed by FOSSEE and Spoken Tutorial Project, '''IIT Bombay'''.  

Thanks for watching.

|}

@@ Line 53: / Line 53: @@
 |-
-| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Show the circuit diagram from the video 0:05
+| style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"|
 | style="background-color:#ffffff;border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.088cm;padding-right:0.191cm;"| Here, we will add a '''pushbutton''' and make a simple counter.

Arduino/C2/Display-counter-using-Arduino/English - Revision history

Nirmala Venkat at 06:51, 20 February 2017

Nirmala Venkat: Created page with "'''Title of script''':''' Display counter using Arduino''' '''Author:''' Manivel and Nirmala Venkat '''Keywords:''' Arduino UNO board, Arduino IDE, Compile and upload, LCD,..."