I recently pulled a 20 pin LCD from a Hypercom T7 CC terminal. I believe it is a 20 x 4. It shows it is manufactured by Ocular and lists a model number of: 2045PCB REV:A along with a few others. However the only one that produced a google result was: AHD-1 E254901. Google shows it as "Gemtec DatecsGtc-16027 Ahd-1 E254901 94v-0 Lcd Panel Display 3ch" If you type E254901 into google you will see the above title, if you follow the link you will see a picture of what I'm working with minus the driver board. I will post the link itself in the morning but I'm posting from a horrible android tablet right now and if I switch tabs to copy the link my post will be gone from the editor.
At any rate I haven't been able to find enough information about this LCD to figure out how to make it work let alone find any Arduino projects using it. Having looked at the board it was removed from it doesn't appear to have a driver chip but the traces are very difficult to follow. I'm pretty sure its being driven by the Zilog Z80 that runs the whole terminal. I know it would be much easier to get a common LCD with a driver board as to not deal with parallel connections at all but I have this now and would love to make it useful if it doesn't require 500 hours of research. Any input is greatly appreciated.
I think I found the datasheet for this LCD so I'm going to go ahead and take a look but I'm very new to this so some input would be great. I'll have to read up on LCD's in general as they relate to Arduino. I think I'm going to have the biggest hurdle translating what's on the datasheet to code. I've programmed in C and other languages but its been about 6 or 7 years.
Eh NVM that's the wrong datasheet.....
Edit 2: The gemtech item listed above is also incorrect. I'm not sure how it is associated with AHD-1 E254901...
Im new to this but on my first LCD lesson i made sure all the pins were in the right place but when i try to update it says LCD not declared? I made sure to add the lcd library as well. Im thinking its something to do with potentiometer
nothingClever:
I recently pulled a 20 pin LCD from a Hypercom T7 CC terminal. I believe it is a 20 x 4.
I used to work for Hypercom. That terminal is pretty old, and I am pretty sure it went end of life in about 2008 or so. I was a developer, and I once wrote code for that specific model. However it was so long ago I remember few details. I seem to remember that the display is dot addressable. I want to say 160x48, or something like that. I think it also emulates a standard 20x4 text display. I seem to remember that pins 1 to 16 are the same as any other HD44xx compatible display. The remaining four pins are extra ground and power for the back light. The last time I touched one of them was in 2005, so that would he 15 years ago. My memory is less than perfect.
Anyway, I just stumbled across one in my stash of parts. Did you get yours to work? I would like to make mine work, but sadly I no longer have access to the datasheet or anything.
