Sandhya.np14 at 06:55, 23 October 2018

2018-10-23T06:55:35Z

Pratik kamble at 10:20, 16 October 2018

2018-10-16T10:20:52Z

Pratik kamble: Created page with "{| Border = 1 | '''Time''' |'''Narration''' |- | 00:01 | Welcome to the''' Spoken Tutorial''' on''' Interfacing Arduino with LCD.''' |- | 00:07 |In this tutorial, we will le..."

2018-10-16T10:18:57Z

Created page with "{| Border = 1 | '''Time''' |'''Narration''' |- | 00:01 | Welcome to the''' Spoken Tutorial''' on''' Interfacing Arduino with LCD.''' |- | 00:07 |In this tutorial, we will le..."

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{| Border = 1
| '''Time'''
|'''Narration'''

|-
| 00:01
| Welcome to the''' Spoken Tutorial''' on''' Interfacing Arduino with LCD.'''

|-
| 00:07
|In this tutorial, we will learn to:

Connect an''' LCD''' to''' Arduino''' board
Write a program to display a text message on the '''LCD'''

|-
| 00:18
| To follow this tutorial, you should have:
Basic knowledge of''' Electronics '''and
Basic knowledge of''' C''' or''' C++''' programming language

|-
| 00:30
|Here I am using:

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

|-
| 00:40
|We also require some external devices such as:
'''LCD 16 by 2 '''
'''Potentiometer'''
'''Breadboard'''
'''Pin header'''
'''Jumper Wires'''

|-
| 00:55
|'''Soldering Iron'''
'''Soldering Stand '''
'''Soldering Lead'''
'''Soldering Paste'''

|-
|01:04
| Now, let us see the details of the circuit connection.

|-
|01:09
| Here we see that there are 16 '''pins''' in the '''LCD'''.

|-
| 01:14
| '''Pin 1''' is the '''ground''' pin represented by '''GND.'''
'''Pin 2''' is the power supply pin of 5 '''volts''' which is represented by '''VCC'''.

|-
| 01:29
| '''VO''' is the '''LCD contrast pin'''. Here you have to connect a '''potentiometer'''.
This will allow a variable '''voltage''' to control the '''contrast''' of the '''LCD'''.

|-
| 01:42
| '''RS''' stands for '''Register Select.'''
It can be used as a '''command register''' or a '''data register. '''

|-
| 01:52
|'''Command register''' is used for placing the command to be displayed.
And the '''data register '''is used to place the data.

|-
| 02:02
| '''RW''' is a '''Read Write '''pin.
We can either read data from the '''LCD''' or write to the '''LCD'''.

|-
| 02:12
| '''E''' represents the '''Enable''' pin. This enables '''LCD''' to accept information.

|-
| 02:20
| These are '''data''' pins. The data and commands are sent to the '''LCD''' through these pins.

|-
| 02:29
| These are''' LCD Backlight '''pins. These are used to power the '''LCD''', control the '''display contrast''', turn on or off the '''LCD backlight''' etc.

|-
| 02:43
| Pin 15 is the '''Anode''' of the '''backlight LCD.'''
Pin 16 is the '''Cathode''' of the '''backlight LCD.'''

|-
| 02:53
| So far, we have seen the '''pin''' details of the '''LCD'''.

|-
| 02:58
| Let us switch to the '''soldering''' stations to see how we can do the '''soldering'''.

|-
| 03:04
|Here, we have:

'''16 by 2 LCD'''
This means, it can display 16 characters per line and there are 2 such lines.

|-
| 03:16
|'''Extension pin''' which needs to be soldered to '''LCD''' so that we can connect easily to the '''breadboard'''
'''Soldering iron''' which is already powered
'''Solder paste'''
'''Solder wire'''

|-
| 03:33
| First, put the external '''pin''' on the '''LCD,''' as shown.

|-
| 03:38
| Next, apply the '''solder paste''' to the tip of the external '''pins''', as shown in the video.

|-
| 03:46
| Then connect it again.

|-
| 03:49
| Place the '''LCD''' with the external '''pin''' firmly on the flat surface, as shown.
Then it will not shake while we do the '''soldering'''.

|-
| 04:02
| Take the '''solder rod''' with little paste and touch the tip of the wire, as shown.

|-
| 04:09
| Hold it for few seconds so that the wire melts and apply to the external '''pin''', as shown.

|-
| 04:19
| I have done '''soldering''' for two '''pins'''. See the close up of the '''soldering''' done for the two '''pins'''.

|-
| 04:27
| Likewise, do the '''soldering''' for the rest of the '''pins'''.

|-
| 04:32
| Let us now switch to the circuit diagram for this experiment.

|-
| 04:37
| '''Potentiometer''' is connected as shown to control the '''contrast''' of the '''LCD'''.

|-
| 04:44
| '''Potentiometer''' is a small sized electronic component used to measure voltage.

|-
| 04:51
| '''Pin''' number 11 is connected to '''enable''' and '''pin''' number 12 is connected to '''register select.'''

|-
| 05:00
| '''Read write pin''' is connected to '''ground''' which means we are writing to the '''LCD'''.

|-
| 05:07
| We are using only 4 data lines for our experiment.
Pin 15 and Pin 16 are connected for the backlight of the LCD.
Connect Pin15 to VCC and pin16 to ground as shown here.

|-
| 05:27
| I have setup the '''Arduino''' and '''LCD,''' as per the circuit diagram.
Our aim is to write two '''strings''' on the '''LCD''' display.

|-
| 05:38
| Now we will write the program in the '''Arduino IDE.'''
Switch to '''Arduino IDE'''.

|-
| 05:46
| First we will go through the reference manual for the '''Liquid crystal library.'''

|-
| 05:52
| In the '''Menu bar''', click '''Help''' and then '''Reference'''.
This will open an offline page.

|-
| 06:00
| Under '''Reference''' section, click on '''Libraries'''.

|-
| 06:04
| Then scroll down to see the available '''Standard Libraries'''.

|-
| 06:10
| Click on '''LiquidCrystal'''. Read the description to know more about the available '''functions'''.

|-
| 06:18
| It says, it works with 4 bit or 8 bit data lines.

|-
| 06:24
| Next, let us see the '''LiquidCrystal function''' and its parameters.

|-
| 06:30
| It is always a good practice to refer to the manual for its '''functions'''.
Click on '''LiquidCrystal function.'''

|-
| 06:39
| The syntax shows how it is used for '''8 bit''' or '''4 bit'''.

|-
| 06:46
| For our experiment, we will use the first line syntax.

|-
| 06:51
| Switch to the''' Arduino IDE.'''

|-
| 06:54
| First we will include the '''Liquid crystal library '''here.

|-
| 06:59
| In the '''Menu''' bar, click '''Sketch''' and '''Include Library.'''
Then select '''LiquidCrystal.''' This will insert the''' LiquidCrystal.h '''file, as shown.

|-
| 07:14
| Now, type the code as shown. Let me explain the parameters.

|-
| 07:21
| '''lcd''' is a variable of '''type Liquid crystal.'''

|-
| 07:26
| First parameter is '''Register Select.'''

'''Register Select''' is connected to '''pin''' 12 of '''Arduino board.'''

|-
| 07:35
| Second parameter is '''Enable. '''It is connected to '''pin''' 11.

|-
| 07:41
| The next 4 parameters are data lines of '''LCD'''.

|-
| 07:46
| '''d4, d5, d6''' and '''d7''' of '''LCD''' are connected to '''pins''' 5, 4, 3 and 2 of the '''Arduino board.'''

|-
| 07:58
| We are initializing the library with '''pins.''' This line of code can be outside the''' void setup function'''.

|-
| 08:07
| In the '''void setup function''', we will write the initial setups required for the experiment.
There is a '''function''' called '''begin'''.

|-
| 08:18
| Let us see the manual for the description and the parameters for this '''function'''.
Switch back to the reference manual.

|-
| 08:27
|The manual says-
1. Initializes the interface to the '''LCD''' screen.

2. Specifies the dimensions (width and height) of the display.

3. Needs to be called before any other '''LCD library commands.'''

|-
| 08:45
| Now, let us see the parameters.

'''lcd''': A variable of '''type liquid crystal'''

'''cols''': the number of columns that the display has.

|-
| 08:58
|We have 16 columns in our '''LCD'''.

'''rows''': the number of rows that the display has.

We have 2 rows.

|-
| 09:09
| Switch back to the '''Arduino IDE.'''

|-
| 09:13
| Now, type: '''lcd.begin open bracket 16 comma 2 close bracket semicolon.'''

|-
| 09:23
| '''Set Cursor''' command will position the cursor in the specified row and column in the '''LCD'''.

|-
| 09:30
|'''Zero comma zero''' means zeroth row and zeroth column.

|-
| 09:36
| There is another command called '''print''' which will print text on the '''LCD.'''

|-
| 09:44
| Type: '''lcd.print''' and enter some text, say “'''First Row”.'''

|-
| 09:52
| Let me explain the program.

|-
| 09:55
| This program will print on a '''16 by 2''' configuration '''LCD'''.

Set the cursor to first position.

'''lcd.print''' will print the text '''“First row”''' in the '''LCD'''.

|-
| 10:12
| Let us compile and upload the program.

|-
| 10:19
| We can see the output '''“First row”''' displayed on the first line.

|-
| 10:25
| There is nothing displayed on the second row.

|-
| 10:29
| Let us change the program to print on the second line also.

|-
| 10:34
| Copy and paste the code. Remove the line “'''lcd.begin'''” as it is initialized at the starting of the program.

|-
| 10:46
| Change the '''setcursor''' command to 0 column and 1 row as shown.

|-
| 10:54
| Change the '''print command''' text to '''“second row”'''

|-
| 10:59
| Now let us compile and upload the program.

|-
| 11:06
| The text is displayed in the second row as well.

|-
| 11:10
| We didn't use any code in the '''void loop.'''

But, still we need to keep the '''loop template.'''

This is because a''' loop function''' is required by the '''Arduino''' syntax.

|-
| 11:24
| Once the text is sent, it is there forever.

|-
| 11:29
| Let us change the cursor position to the 3 column in the second line.

|-
| 11:34
| Again, compile and upload the program.

|-
| 11:38
| Note the change in the column position in the second row.

|-
| 11:43
| Switch back to our '''function''' list in the manual.

|-
| 11:47
| We can see there are many more '''functions''' such as '''scrollDisplayRight, scrollDisplayLeft''' etc.
Explore these '''functions''' on your own.

|-
| 12:01
| This brings us to the end of this tutorial. Let us summarize.

|-
| 12:06
|In this tutorial, we learnt to:

Connect an''' LCD''' to''' Arduino board'''

Write a program to display a text message on '''LCD'''

|-
|12:18
|Do the following assignment.

Change the same program to display the text “'''Hello World'''” in the second row.
Place the cursor in the 4th column.
Compile and upload the program
Observe the text displayed in the '''LCD'''.

|-
| 12:40
| The video at the following link summarizes the Spoken Tutorial project.
Please download and watch it.

|-
| 12:48
| The''' Spoken Tutorial Project''' Team:

conducts workshops and gives certificates.
For more details, please write to us.

|-
| 12:58
|Please post your timed queries in this forum.

|-
| 13:02
| Spoken Tutorial project is funded by NMEICT, MHRD, Government of India.
More information on this mission is available at this link.

|-
| 13:13
| This tutorial has been contributed by FOSSEE and Spoken Tutorial Project, IIT Bombay.Thanks for watching.
|}

← Older revision		Revision as of 10:20, 16 October 2018
Line 294:		Line 294:

	'''lcd''': A variable of '''type liquid crystal'''		'''lcd''': A variable of '''type liquid crystal'''
−

	'''cols''': the number of columns that the display has.		'''cols''': the number of columns that the display has.

Arduino/C2/Arduino-with-LCD/English-timed - Revision history

Sandhya.np14 at 06:55, 23 October 2018

Pratik kamble at 10:20, 16 October 2018

Pratik kamble: Created page with "{| Border = 1 | '''Time''' |'''Narration''' |- | 00:01 | Welcome to the''' Spoken Tutorial''' on''' Interfacing Arduino with LCD.''' |- | 00:07 |In this tutorial, we will le..."