What you need:
1. the display whit hd44780 chip
3. 100ohm resistor
4. an old lpt cable
5. an usb cable
1. soldering iron
2. 3rd hand
Step 1: Datasheet
Step 2: Connecting Cables
Lcd Pins Wire color
DB4 Dark green
Now take the usb cable and connect the black and the red wires respectively to VSS and VDD display pins. (check your datasheet for the right connection, for me pin1 was VSS, and pin2 VDD)
you can cut off the green and the white wire...
Step 3: Trimmer and Resistor
Then take the 100ohm resistor and connect it between the pin BL+ and VDD, and then connect the pin BL- to VSS with a wire.
Step 4: FINISHED!!!!!
to test it plug the usb cable to the computer if the screen lights on and appear a black line it works, if not plug out soon and check the links (use the trimmer to try the screen, it regulates contrast, maybe if you not see any line in the screen it is possible that the contrast is regulated to minimum)
Your result must be like this once you installed the program to interface with it (i had not lpt cables so I used normal wires to connect to the lpt port)
Step 5: Conclusion
How to use CrystalControl comes soon!
Sorry for my language, I'm studing english and I make a lot of errors!