Problem with LCD

Using Arduino Programming Questions
#1

Hello, I have a problem with my LCD, I just want to display "Hello World" with the example on Arduino software but I don't understand why it doesn't work. I followed this schema except for V0, I don't have potentiometer at home so i linked V0 to 3.3V on my Arduino Uno

Then I transfer the Example named "Hello World" and it display nothing. Worst, after 10-20 minutes, the LCD gets very hot. I really don't understand why. My LCD is a LM052l with a Hitachi HD44780 driver, I give you the datasheet:

http://www.allelectronics.com/mas_assets/spec/LCD-117.pdf

I check all pins with an oscilloscope and all is clean except maybe for the Enable pin. I thought it must have a continuous voltage but I have many impulsions. So I don't know if it's normal or not...

Well, thanks if you an help me because it was suppose be simple to use this LCD but I was wrong :frowning:

#2

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#3

I followed this schema except for V0, I don't have potentiometer at home so i linked V0 to 3.3V on my Arduino Uno

You are willing to risk burning up the LCD but are too cheap to go buy a potentiometer? I don't get it.

#4

Sure, but you won't see something with this mess

http://www.noelshack.com/2014-08-1393172067-img-0049.jpg
http://image.noelshack.com/fichiers/2014/08/1393172066-img-0050.jpg

You are willing to risk burning up the LCD but are too cheap to go buy a potentiometer? I don't get it.

Why I will burn it? I guess V0 is suppose to be between 0 and 5V. So I put 3.3V to avoid to buy a simple potentiometer.

#5

Why I will burn it?

Worst, after 10-20 minutes, the LCD gets very hot.

Just leave it like that for a couple of hours, then. There is a reason that the schematic calls for a potentiometer.

#6

Ok, I thought it was just to have a contrast. But you think it's the problem, or it's another in addiction to my principal problem?

#7

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#8