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Connecting and programming an LCD with Arduino allows you to display text, numbers, or custom characters. Below is a step-by-step guide to set up and use a 16x2 LCD with the LiquidCrystal library.
Hardware Setup
Components Required: Arduino Board (e.g., Uno) 16x2 LCD (compatible with Hitachi HD44780 driver) 10kΩ potentiometer (for contrast adjustment) 220Ω resistor (for backlight) Breadboard and jumper wires
Wiring: Connect the LCD pins to the Arduino as follows: LCD RS pin → Arduino digital pin 12 LCD Enable pin → Arduino digital pin 11 LCD D4 → Arduino digital pin 5 LCD D5 → Arduino digital pin 4 LCD D6 → Arduino digital pin 3 LCD D7 → Arduino digital pin 2 LCD VSS → GND LCD VCC → 5V LCD R/W → GND Potentiometer wiper → LCD VO (pin 3) Connect the backlight pins: LED+ → 5V through a 220Ω resistor LED- → GND
Programming the LCD
Include the Library: Use the built-in LiquidCrystal library to simplify communication with the LCD.
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