{"id":808,"date":"2020-10-30T11:22:51","date_gmt":"2020-10-30T05:52:51","guid":{"rendered":"https:\/\/botuniverse.in\/?p=808"},"modified":"2022-01-04T08:05:38","modified_gmt":"2022-01-04T02:35:38","slug":"lcd-tutorial","status":"publish","type":"post","link":"https:\/\/botuniverse.in\/index.php\/2020\/10\/30\/lcd-tutorial\/","title":{"rendered":"How to use a LCD Part 1"},"content":{"rendered":"\n

The LCD Display is now very commonly used. To begin with we will be using the botuniverse LCD display.<\/a><\/p>\n\n\n\n

In the LCD Display, we have 16 columns & 2 rows with each block having 5×8 pixels. <\/p>\n\n\n\n

Let’s Understand how the pins work:<\/strong><\/p>\n\n\n\n

  1. VSS \/ GND – This is the negative terminal & has to be connected to the GND pin of UNO<\/li>
  2. VDD \/ VCC – This is the positive terminal & has to be connected to the 5v pin of the UNO<\/li>
  3. VO – This is used to control the display contrast by varying its value<\/li>
  4. RS – This is also known as the register select pin. When it is low, it is understood that we are not sending data i.e. characters to it & doing other actions like clearing the scroll or changing the cursor location. When it is high, we are sending characters to the LCD using the pins D0 – D7.<\/li>
  5. R\/W – Also known as the Read & Write pin. We can control whether to read or to write by varying its value from 1 to 0 & vice-versa<\/li>
  6. E – Also known as the Enable pin. It works like a sync button, like ctrl+s<\/li>
  7. DB0 – DB7 – These pins go into D0 – D7. These pins are used to transit data to the LCD display.<\/li>
  8. A – Anode(+) Pin for the LCD Backlight<\/li>
  9. C – Cathode(-) Pin for the LCD Backlight<\/li><\/ol>\n\n\n\n

    <\/p>\n\n\n\n

    The two modes of the RS pin<\/strong><\/p>\n\n\n\n

    1. Command Mode – RS pin is low ; commands like set cursor , clear screen<\/li>
    2. Data Mode – RS pin is high ; data is being set through the pins.<\/li><\/ol>\n\n\n\n

      The two modes of the R\/W pin<\/strong><\/p>\n\n\n\n

      1. Read Mode – R\/W is high<\/li>
      2. Write Mode – R\/W is low<\/li><\/ol>\n\n\n\n
        \"\"<\/figure>\n\n\n\n
        \/\/botuniverse.in\n#include <LiquidCrystal.h> \/\/ Including the library\nLiquidCrystal lcd = LiquidCrystal(2, 3, 4, 5, 6, 7); \/\/ Creating an LCD Object with the\n\/\/requred parameters (Pins)\n\nvoid setup() {\n  lcd.begin(16, 2); \/\/Specifying the LCD's number of columns & rows\n}\nvoid loop() {\n  lcd.setCursor(2, 0); \/\/Setting the cursor on the third column & first row.\n  \/\/Counting starts at one\n  lcd.print(\"Hello World!\"); \/\/Printing Hello World\n  lcd.setCursor(2, 1); \/\/ Setting the curson on the third column & second row\n  lcd.print(\"LCD tutorial\"); \/\/Printing LCD tutorial\n}   <\/code><\/pre>\n\n\n\n
        Attached is a video for help:<\/p>\n\n\n\n