At 22:17 08/08/97 GMT+0200, you wrote:

>I want to use a Hitachi LCD display (2*16) in a battery operated PIC
>project.  I was thinking of using three 1.5V cells.  Unfortuntely I
>cannot find any mention of the minimum supply voltage for the LCD module
>in the Hitachi docs.  Does anybody know what the minimum operating
>voltage is?

Do you have the actual reference of your display?
4.5 Volts might be on the low side, depending on the controller and driver
used on the module. That is also true for the VLCD (operating voltage of the
LCD).
For your information there is a FAQ on LCD, I can try to find the URL for you.
Bye,
Daniel