HD44780 LCD

[mitpatterson]

I have this LCD from the store here at adafruit, and i've had it for about a week, am just now getting around to playing with it, and the screen seems messed up, not sure if didn't do something right or if the screen is defective, i've posted pictures of the screen and my set up, please let me know if there is anything else i should test to determine which is bad(my setup vs actual LCD)

showing the connections

100_2392 (Medium).JPG (179.8 KiB) Viewed 2146 times

showing a test message

100_2394 (Medium).JPG (73.21 KiB) Viewed 2146 times

the code, shown below is a modified version of the example code for hello world, i changed the pin outs as directed in ladyadas directions and also changed the message to show the problem is across the whole screen

showing the code that is running on it right now

100_2395 (Medium).JPG (220.61 KiB) Viewed 2146 times

[adafruit_support_bill]

Your wiring looks right. I've wired up quite a few and in my experience, if you get it wrong you will get nothing at all, or you will see Japanese characters.

But the character blocks on your display are uneven sizes (some are only 4 pixels wide) and the characters are not aligned with them. Were the character blocks like that before you started on the "Bus Circuit" part of the tutorial?

[mitpatterson]

no, if you remove the bus/data lines it just shows the blocks, with all the pins other than power and ground disconnected this what i get:

with datalines disconnected

100_2408 (Medium).JPG (71.83 KiB) Viewed 2137 times

[franklin97355]

Try adjusting the contrast.

[adafruit_support_bill]

What I meant was the uneven sizes of the blocks. All the blocks should be 5x8 pixels with about a pixel spacing between them. In your first post, it looked like some were only 4 pixels wide, and the space between them was more like two.

With the contrast properly adjusted, the blocks will vanish into the background, but your characters should still be aligned within those 5x8 blocks. Yours appear not to be aligned.

In you last post - without the data lines, the blocks appear to be of even size, but on blocks 8 and 13 the rightmost column of pixels is dark. Can you get nice evenly illuminated 5x8 blocks by adjusting the contrast?

[mitpatterson]

I can get the blocks even, but the text is stil mis aligned

[adafruit_support_bill]

I'd contact Adafruit about a replacement. Be sure to reference this thread in your email.

[adafruit]

I'd contact Adafruit about a replacement. Be sure to reference this thread in your email.

we're sending out a replacement.

[mitpatterson]

thanks again adafruit, 5 ***** Star Customer Service