Hey people!
I just bought arduino boards and I'm playing with it trying to remember all the basics of electronic I learned at college :).
I got like 20 graphic LCD that I cannot find data sheets for (Really, they are impossible to find). Instead of buying new graphic LCD for my project, I am really interested in finding out how they work. The only thing I know is that they have 18 pins and have a backlight.
First thing first, I ordered a Logic Analyzer/Signal Generator. (Not yet received, soon!).
But... How can I analyze something that is not powered...
I am lost. I went and see datasheets for similar Graphic LCD (with backlight, 18 pins). But that didn't work out, and I think I just fried a LCD by inverting + with - .
Can the arduino community give me some guidelines or directions?
What about if I could find one that is powered and working?
Thank you :).
btw, on the screen it says...
PRO57704 Rev. A
and on the board it says...
PRO59801 Rev. 0
it also says I2N71AF behind the screen, which gives 0 google result.
There is no single standard for wiring graphic LCDs, I have seen many different variations of the 18 pins. But two of the more common ones found are documented here: Arduino Playground - GLCDks0108
Perhaps if you can post some clear photographs showing the chips on the board there might be some clues as to what you have.
But... How can I analyze something that is not powered...
Simple you can't. You can only analise something that is working.
Most of the LCDs used with the Arduino are character based LCD not graphic LCDs.
To use a graphics based LCD you need to constantly refresh it rather like a TV display. The Arduino is not suited to this due to lack of support hardware and insufficient memory to support the display.
(Really, they are impossible to find)
Yes this is because most graphics LCDs are only manufactured for a short time, say 6 months while the product is in production. To get an LCD with a guaranteed manufacturing life of three years is possible but rare. Anything else is imposable.
To use a graphics based LCD you need to constantly refresh it rather like a TV display.
That's not accurate. Most of the Graphical LCDs that you get from companies that sell Arduino related components use an internal controller chip that does not require any external refresh. The KS0108 based graphical LCDs linked in my previous post are a popular example.
You need to find out more about what you have. On most modern LCDs, chips are embedded below round circles of black epoxy. Can you post a clear picture of the circuit board for your panel.
impossible for me to work the graphic LCD with the arduino
As mem says there are some LCD graphics displays that are made on shields to work with an Arduino. These contain the refresh drivers and the memory, they also cost considerably more than the Arduino itself. So if you have got your LCD from an old phone or hand held game or PDA then you are unlikely to be able to drive it with an Arduino.
Its difficult to tell from those pictures - perhaps when you get your camera back you can post something clearer
Below are some links to inexpensive modules that work with the code posted in the playground here: http://www.arduino.cc/playground/Code/GLCDks0108
No refreshing is required and the only external component needed is 10k variable resistor (and possibly a resistor for the backlight).
I welcome! Can it is still actual? :
At me too many such displays I repair POS-terminals ingenico 7910 there they stand. Too all Internet has seen in searches pdf but has found it was necessary to look through nothing all modules which is in the market and it has coincided with module WX12864A (on
the basis of controller KS0713 (S6B1713) from samsung) differences in that that PRO57704 Rev already with capacitors
and led illumination
Value of legs the such:
1 gnd
2 + 3.3v
3 n.c.
4 ResetB
5 CS1B (I have simply planted it on gnd)
6 RS
7 R/W
8 ERD
9-16 DB0-DB7
17 + led
18 - led
And as the information about the module for connection to lpt
The scheme of connection WX12864C
@@@ . adgd . ru/images/img_lcd_05 . jpg
The program for lpt
@@@ . crystalfontz . com/product/CFAX_WinTest
Experiment with WX12864C (in Russian)
@@@ . adgd . ru/WX12864C_Quick_Start_Part2 . html
P.S.
Excuse for bad English I use translit
Greetings to you from cold Russia!