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Topic: LCD not working with arduino powered (Read 2 times) previous topic - next topic

ArchDemise

when i power up my arduino, my lcd will only light up and not display anything, instead it will keep flashing dark boxes.

is my lcd not working and how do i troubleshoot it?

Nick Gammon

We are going to need more detail.


  • Which Arduino?

  • Which LCD? (part number or link to it)

  • How did you connect them?

  • What sketch (code) are you running?

  • A photo might help if there is doubt.



How to use this forum

ArchDemise

#2
Sep 10, 2013, 06:34 am Last Edit: Sep 10, 2013, 06:39 am by ArchDemise Reason: 1

We are going to need more detail.


  • Which Arduino?

  • Which LCD? (part number or link to it)

  • How did you connect them?

  • What sketch (code) are you running?

  • A photo might help if there is doubt.



How to use this forum



-Arduino Uno
-LMB162A
-code
Code: [Select]
/*
  LiquidCrystal Library - Hello World

Demonstrates the use a 16x2 LCD display.  The LiquidCrystal
library works with all LCD displays that are compatible with the
Hitachi HD44780 driver. There are many of them out there, and you
can usually tell them by the 16-pin interface.

This sketch prints "Hello World!" to the LCD
and shows the time.

  The circuit:
* LCD RS pin to digital pin 12
* LCD Enable pin to digital pin 11
* LCD D4 pin to digital pin 5
* LCD D5 pin to digital pin 4
* LCD D6 pin to digital pin 3
* LCD D7 pin to digital pin 2
* LCD R/W pin to ground
* 10K resistor:
* ends to +5V and ground
* wiper to LCD VO pin (pin 3)

Library originally added 18 Apr 2008
by David A. Mellis
library modified 5 Jul 2009
by Limor Fried (http://www.ladyada.net)
example added 9 Jul 2009
by Tom Igoe
modified 22 Nov 2010
by Tom Igoe

This example code is in the public domain.

http://www.arduino.cc/en/Tutorial/LiquidCrystal
*/

// 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);
}

http://www.youtube.com/watch?v=BWSlINIEhqg&feature=youtu.be

i added a video showing the error of the lcd

HazardsMind

#3
Sep 10, 2013, 07:48 am Last Edit: Sep 10, 2013, 07:52 am by HazardsMind Reason: 1
That looks like either bad or loose wiring, check all your connects again. Make sure they are nice and solid.

However, that is just a guess. If you have a data sheet on the LCD, please provided it.
Created Libraries:
TFT_Extension, OneWireKeypad, SerialServo, (UPD)WiiClassicController, VWID

ArchDemise


That looks like either bad or loose wiring, check all your connects again. Make sure they are nice and solid.

However, that is just a guess. If you have a data sheet on the LCD, please provided it.


no datasheet provided when i got this , cause i got it from school

+ i used new wires and connected everything in order howerer it is still not working

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