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Arduino LCD

2015.5.22

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This is to help you get your 2x8 MJ0802A LCD or compatible to work with an arduino.

LCD Pin Symbol Function Arduino Pin
1 VSS Logic GND (0V) GND
2 VDD Logic PWR (5V) 5V
3 V0 LCD GND (0V) GND
4 RS H: Data, L: Instruction PIN 12
5 R/W H: Read, L: Write GND
6 E Enable PIN 11
7 DB0 Data -
8 DB1 Data -
9 DB2 Data -
10 DB3 Data -
11 DB4 Data PIN 5
12 DB5 Data PIN 4
13 DB6 Data PIN 3
14 DB7 Data PIN 2
15 BL- Backlight GND (0V) GND
16 BL+ Backlight PWR (3-5V) 3.3V or 5V

Open File > Examples > LiquidCrystal > HelloWorld and upload!


#include <LiquidCrystal.h>
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(millis() / 1000);
}

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