Re: AW: [avr-chat] LCD duty cycles, help please

[James Dessart]

On Sun, 27 Feb 2005 23:44:40 +0100, Rune Christensen
<address@hidden> wrote:
> On LCD with the HD44780 the contrast is changed by a 10k ohm potentiometer.
> The same could be done here but I don't know the exact values.

I'm sure it's possible to experiment with that without too much risk.

> I think you need to create some kind of controller for the LCD. It could be
> a microcontroller. You need precise timing and if it going to be used as a
> graphical display you will need about 640*480/8 = 38400 bytes of dual port
> memory.

That's probably where I'll probably have to spend all my project
money. :) Gonna have to price that on DigiKey.

As far as precise timing, I'll probably write it in assembly, and
maybe use an external crystal to ensure a particular cycle count.

James