24 x 1 LCD

Although they are rather a small display, they have good contrast which is important because they have no backlight. I found an excellent tutorial for using them with the arduino: http://cratel.wichita.edu/blogs/jeffweide/2008/05/11/arduino-and-the-hitachi-lcd-display-driver/

Highly recommend these displays.

This is regarding the post from "a customer.....asfdsa" who gets unwanted repeated characters.

You need to de-bounce the Enable pulse trigger. (pin 6 of the LCD)
The enable pulse needed to send a character to the display is of a very short duration, and any noise/ripple will be interpreted as multiple pulses by the LCD.

Here is a LCD tutorial that I found helpful.
http://www.electronics-lab.com/articles/lcd/lcd1.pdf

It's a two part article that shows how to hook-up a LCD with switches, and then goes on to explain using a MCU with the LCD. A de-bounce switch is also Illustrated.

On most applications of a 14 pin lcd the 3rd pin is wired to a potentiometer or known resistance to set the contrast of the lcd screen. In this products case the pin is labeled Controller Reset. I am not sure what to do with this pin and cant get anything to display on the lcd, I would assume tie it low but that doesn't work either. Any suggestions

When I write a char to the display it writes the same char to all locations on the LCD. So if I send an 'a' I get 'aaaaaaaaaaaaaaaaaaaaaaaa' and so on.

All I do is send a char one at a time but each time it just fills up the entire LCD instead of writing one char, moving cursor, writing next char, etc...

Anyone have any ideas what I'm doing wrong?

IM0 and IM1 are right next to each other. I removed some of the epoxy stuff and it seem that the two pins above IM1(if that is IM1 from the other posts) are connected. The data sheet says this is SFT and controls the segment display.

It might be possible solder a magnet wire after splitting the junction. it would be pretty difficult to do though but not necessarily impossible.

Since for 4-bit mode you need both VCC but it is grounded in 8-bit, I imagine you can cut IM0 from SFT, solder it to IM1, cut IM1 from ground and jump it to Vcc.

Since SFT is ground(or should be), to get into I2C mode you would simply remove the connection to the via on IM1 and jump it to IM0 which it is right next too(a bit of solder should do it).

To get into 4-bit you need to cut IM0 and jump it to IM1. This will probably require removing a little of the epoxy.

To get into clocked serial you would need to swap IM1 and IM0. This is the hardest because it would probably require two jumpers and cutting both.