Thanks for help,
I've tried this :
for (int brightness = 0; brightness < 255; brightness++) {
analogWrite(3, brightness);
delay(3);
}
So I can see all values for the contrast. It works well.
BUT I don't see the "Helloworld" :-(
Is the call of the u8glib ok ? I have tried those :
U8GLIB_ST7920_128X64_1X u8g(52, 51, 53);
//OR
U8GLIB_ST7920_128X64_4X u8g(52, 51, 53);
I don't understand the difference but with both of them my glcd don't want to say hello...
Am I right with the 52, 51, 53 pins ?
Thanks