Hi, Guys
I just brought a 20 X 2 LCD display with hitachi 44780 LCD controller inside.
I wonder that when i upload my coding, it's display nothing even I adjust the potentiometer for control contrast..
I am using example coding in Arduino IDE
Did you have a LCD display working before ?
It can be hard to make it work, since every wire should be properly connected, or else it won't work.
Can you show your sketch, and maybe attach a photo of your wiring ?
The display could be broken. When you adjust the contrast, do you see some blocks or pixels ?
No, i also brought a 16 X 2 LCD display module but it different controller which are not HITACHI.
So I brought another different type today.
I can attach a image but I afraid that it's messy to figure.
It's changes nothing when i adjust the VR.
As far as I know, every cheap 16x2 lcd display is compatible with the Arduino LiquidCrystal library. Some have a I2C interface, and need another library.
Did you do this tutorial ? http://www.arduino.cc/en/Tutorial/LiquidCrystal
When you use a breadboard, it can have bad contacts.
My suggestion is to remove all wires and start all over again. Don't use the same locations on the breadboard. Try the other display. Somehow something should work.
If that doesn't help, I would like to know a lot more: which Arduino board, links to the displays, what is the value of the potentiometer, show your sketch, and a photo if possible.
Thanks Peter, it's working now...
It's my potentiometer problem and also connection.
Anyway, thanks a lot
Very good. I'm glad it's working now 