Cytron Technical Forum

hello,

I have try to interface the lcd JHD162A with my arduino. After I upload the code to arduino the lcd just light up but it didn't show anything on the lcd. Did you no what the problem?

Mind showing us the hardware wiring? A few clear photos will help a lot.

the code for lcd;

/ / include the library code:
#include <LiquidCrystal.h>

// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

void setup() {
// set up the LCD's number of columns and rows:
lcd.begin(16, 2);
// Print a message to the LCD.
lcd.print("hello, world!");
}

void loop() {
// set the cursor to column 0, line 1
// (note: line 1 is the second row, since counting begins with 0):
lcd.setCursor(0, 1);
// print the number of seconds since reset:
lcd.print(millis()/1000);
}




the hardware connections;

1 -> GND (Arduino)
2 -> +5V (Arduino)
3 -> 1KOHM potentiometer
4 -> Arduino pin 12
5 -> GND
6 -> Arduino pin 11
7 -> no connection
8 -> no connection
9 -> no connection
10 -> no connection
11 -> Arduino pin 5
12 -> Arduino pin 4
13 -> Arduino pin 3
14 -> Arduino pin 2
15 -> 5V
16 -> GND

Thanks for the explanation and picture, but the photo is not clear enough.

can you capture the LCD when there is power? Is the black box appear on the LCD? Can you try adjusting the 1K potentiometer?