i have lcd 4*40, but i don’t have datasheet. at the backside of my lcd any 404A3 VER1.0 code. if my lcd is same with your lcd 4*40?
If not right, please help me to identify my lcd. becouse i’m confuse to identification my lcd.
i have any datasheet too, there are H4004 type, AMC 4004C, PC 4004-A etc.
wel, i am endding my questions.
thanks for your attentions,

besregard,

atog

The easiest LCD to use would be a serial LCD as it takes very little work to connect to the Arduino. I ended up using a Purdy LCD.

Datasheet: http://www.purdyelectronics.com/pdf/AND791GST.pdf

The current version of the LCD library I edited is meant to run with a 74HC595N Shift Register. You can find the latest library and the schematics for such a setup here: http://www.tekcrack.com/arduino-purdy-lcd-74hc595n-shift-register.html

Pretty much any LCD screen with the Purdy configuration which has a HD44780 compatible controller on it will work. The reason for using the shift register on the above post was because my particular LCD screen has two LCD controllers on it. If you had a screen with just one controller, you could compare the changes between the code in the above post and this post: http://www.tekcrack.com/interfacing-arduino-with-a-purdy-lcd-4×40-modified-lcd4bit-library.html

What kind of LCD screen should I get (do you have the part number)? Also where can I find a detailed version of the wiring schema (Arduino to LCD screen)?

Great job on this project!

Ron