I have an AV1640 blue/white (see attachment for datasheet) wired to my Arduino Mega:
Vss → GND
VDD → 5V
V0 → Poti 10k 5V/GND
RS → pin 14
E → pin 15
D4 → pin 16
D5 → pin 17
D6 → pin 18
D7 → pin 19
Then I tested the hello world sketch from the tutorial section with LiquidCrystal lcd(14, 15, 16, 17, 18, 19). Unfortunately I don’t see anything. No backlight, no letters, nothing.
What do I do wrong?
Cheers in advance for any help!
181656-da-01-en-LCD_MOD_STN_BLAU_NEG_LED_WEISS_16X4.pdf (689 KB)
Did you read this?
Pay attention to H-8 (which isn't there yet). It will say something like: "Didn't deal with R/W (LCD pin 5) correctly."
No backlight, no letters, nothing.
On my Blue/White display you cannot see anything without the backlight so you should get the backlight working first. This has nothing to do with the Arduino other than the fact that you will probably get the power for the backlight from the Arduino pc board.
Pay attention to H-8 (which isn’t there yet). It will say something like: “Didn’t deal with R/W (LCD pin 5) correctly.”
Are you sure it’s not there?
That's why I used the word "yet". I didn't mention how to deal with R/W but if you are going to add that second sentence you should qualify it with "In most cases ...".
« Last Edit: Today at 12:46:02 PM by liudr »
This part seems to have changed as well....