The following guides may be helpful:
- Parallel LCD Project HD44780 Controller HOWTO
- Ice Hardware: Parallel LCD Wiring
- Ice Hardware: Vacuum Florescent Displays - The cheap way
for a circuit with a potmeter-backlight, and
and for an 4x40
for one you can switch on and off with LCD Smartie.
I haven't tried them both and are not 101% sure they work.
(use at own risk)
This last one is modefied by loser for the HD66701 controller (so don't use for your HD44780)
Ok, i had some ppl from sweden who had 4 bit LCD's. One of them told me that you could mod your 4 bit LCD to a 8 bit by soldering wires directly to the chip.
the codes next to the pins indicate tell you what wires you can use in the above circuits
Beware not to solder anything wrong!