Go Down

Topic: HD44780 20x4 issue (showing all squares) (Read 4467 times) previous topic - next topic

floresta

#15
Oct 09, 2012, 09:51 pm Last Edit: Oct 09, 2012, 09:55 pm by floresta Reason: 1
Quote
Meh, the only thing that changes from what i'm doing, is the 5V+ connected to the potentiometer. So nothing changes. Right?

Please rephrase this, I don't understand.

In one photo it looks to me as if your RS, R/W, and E connections are offset by one pin at the LCD end.  In another it look like just the E connection is wrong.  All of the solder connections are horrible.


Don

altagest

Horrible is a compliment. I know it's pitiful. It's a fast prototype, anyway, i'm doing exactly what is in the scheme by DEAFBOY. The only thing that changes, is that i'm taking two wires from the +5V of the Arduino: one to the potentiometer and the other on the supply of the LCD directly. Then it's exactly the same. I double and triple checked the connections and they are correct.

dhenry

Quote
i'm doing exactly what is in the scheme by DEAFBOY. The only thing that changes,


= "I am doing exactly what you told me to do, other than that I am doing none of what you told me to do."

floresta

Quote
It's a fast prototype, anyway,

It's not really going that fast, is it?

Quote
I double and triple checked the connections and they are correct.

I've heard this before.

Please provide a photograph that unambiguously shows the connections between your LCD module and your Arduino.  As I said before some of your connections appear incorrect in your previous photos.


Don

liudr


Horrible is a compliment. I know it's pitiful. It's a fast prototype, anyway, i'm doing exactly what is in the scheme by DEAFBOY. The only thing that changes, is that i'm taking two wires from the +5V of the Arduino: one to the potentiometer and the other on the supply of the LCD directly. Then it's exactly the same. I double and triple checked the connections and they are correct.


I recommend a breadboard and a breadboard friendly potentiometer and jumper wires. Or just get an LCD shield.

dhenry

Quote
I double and triple checked the connections and they are correct.


Some wise guy said a while ago that bugs usually are where you don't expect them to be.


altagest

Mmm... yesterday night i posted the images, but for a strange reason i can't find them now. I know it sucks, but if you don't have 10 fingers (and a breadbord) then it's a quite discrete job. I'll get a breadboard and let you know. Dhenry, where you talking about good ol' Edsger?

Go Up