What to look for in a display?

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Hi guys, I would like to start playing with some displays and I was wondering if any of you have some advice at what to look for or even some links to some good documentation.

I would like to play with some character moduals (simple 20x2 would be great) and some monochrome graphical displays (say 128x64).

The one thing I have already noticed is that some displays require 2 power supples a 5v and a 10v supply, I don't really like this.

I'm not a cartoon character but I play one in real life.

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Well, this datasheet is pretty universal and the initialization procedures are very simply put.

Hope it helps.

Note: It's only for character displays

BTW: Check out the projects section. There's a bazilion things with displays.

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There are pointy haired bald people.
Time flies when you have a bad prescaler selected.

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George: The -3.5V i thing is solved in some strange manner on most HD44780 comp. disps. as I have never seen any character display which would have other power requirements than : +5V, GND, CONTRAST. Maybe the HD44780 has the converter inside? Dunno

There are pointy haired bald people.
Time flies when you have a bad prescaler selected.