LCD 1602 Reference
A 16-column, 2-row character LCD with an HD44780-compatible controller and a backlight LED.
Pin names
| Name | Description |
|---|---|
| VSS | Ground |
| VDD | Power (5V) |
| V0 | Contrast — tie to GND for max contrast in the simulator |
| RS | Register Select |
| RW | Read/Write — tie to GND to always write |
| E | Enable |
| D0–D7 | Data bus (only D4–D7 needed in 4-bit mode) |
| A | Backlight LED anode |
| K | Backlight LED cathode |
Attributes
This component has no configurable attributes.
Usage
Drive the display in 4-bit mode using RS, E, and D4–D7, with RW and V0 tied
to GND. Use the built-in LiquidCrystal library.
#include <LiquidCrystal.h>
// RS, E, D4, D5, D6, D7
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
void setup() {
lcd.begin(16, 2);
lcd.print("Hello, World!");
}
void loop() {
lcd.setCursor(0, 1);
lcd.print("Time: ");
lcd.print(millis() / 1000);
lcd.print("s ");
delay(500);
}In real hardware, wire RW and V0 to GND, and power the backlight (A) through a 220 Ω resistor from 5V, with K to GND.
Examples
| Description | Attrs |
|---|---|
| Default 16×2 display | {} |
See also
- LCD 2004 — same 16-pin interface, 20×4 characters
- SSD1306 OLED — graphical alternative using I²C instead of a parallel bus