16x2 LCD

Other Hardware Displays
1

Hey guys,

I'm using a 16x2 LCD for a project and have a quick question. Both the LCD's I'm using seem to have "missing digits", when I try to write data to the missing digits nothing appears, when I adjust the voltage at V0 they voids become clear.

Has anyone experienced anything like this before? I'm thinking it's a hardware problem... I'm not using an arduino platform so we won't discuss the software as I'm confident it's not that...

Thanks!

2

I am not sure what the issue is, it looks like you have all 16 digits in both rows? Which digits are you missing?

3

Your display has serious problems most likely due to poor connections between the LCD 'glass' and the pc board.

These connections are made by 'zebra strips' and there have been numerous threads with information about them.

The search capabilities of this forum software is abysmal, even if you find the camouflaged search box. Try the following Google search: "LCD zebra site:arduino.cc".

Also: your contrast voltage is too close to zero.

Don

4

floresta:
Your display has serious problems most likely due to poor connections between the LCD 'glass' and the pc board.

These connections are made by 'zebra strips' and there have been numerous threads with information about them.

The search capabilities of this forum software is abysmal, even if you find the camouflaged search box. Try the following Google search: "LCD zebra site:arduino.cc".

Also: your contrast voltage is too close to zero.

Don

Thank you very much, I know my contrast voltage is completely wrong, but I put it that way in an attempt to show the problem. I'm going to do a Google search, essentially it's a manufacture defect?

5

See this thread (concurrent).

Only difference is that you seem to be having this problem from the get go.

And you say that two displays are the same?

Just offhand, better give us a code sample (that is, a complete sketch).

6

Paul__B:
See this thread (concurrent).

Only difference is that you seem to be having this problem from the get go.

And you say that two displays are the same?

Just offhand, better give us a code sample (that is, a complete sketch).

They have the same problem, not the same exact dead pixels... I might have over voltaged them both and blew em up? That's pretty much what I'm best at. As I said before it's not an arduino platform, I can upload the code anyways but it's messy so I may just buy another LCD, try that, and then get into the software later.

Thanks for your reply! :slight_smile: