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Introduction: When to use Liquid Crystal Display (LCD)?
Step 01 Supply the breadboard with Arduino 5V Power and GND
Step 02 Connect the LCD's GND or VSS to the breadboard ground, and the LCD's VDD to the breadboard's power line.
Connect the LCD VDD pin to 5V
Step 04 Connect the LCD BackLight Anode pin to 5V power line in series with [220 ohms, 100K ohms] resistor.
Step 05 Connect LCD Cathode Pin to voltage low and control the LCD contrast V0 pin using potentiometer.
Step 06 Connect LCD Register Select RS pin to Arduino Digital Pin 12.
Step 07 Connect LCD Read/Write RW Pin to GND; Voltage High means Read and Voltage Low means Write.
Step 08 Connect LCD Enable Pin E to Arduino Digital Pin 11 to initiate LCD to receive instructions.
Step 09 Connect the last four LCD data bus ( D4, D5, D6, D7 ) to Arduino Digital Pins 5,4,3,2 in order. We use DB0 to DB7 for 8-bit data transfer. But since 4-bit data transfer is enough, we only use DB4 to DB7.
Step 10 To program Arduino, connect it to the computer.
How to check if Arduino is connected to Windows or detected by the laptop or computer using Device Manager
Step 11: Program the Arduino uno board to control or display Alphanumeric characters on the LCD.
LiquidCrystal header file
lcd object instantiation
lcd begin function
Select Arduino board type and COM PORT number in the IDE
Compile code by clicking the check or Verify button
lcd setCursor function
lcd print function