More progress with the displays

I have both displays hooked up and working independently now, and like I had hoped, it only takes 7 output pins to drive both displays.

Here is how they are wired

LCD Pin	Arduino Pin
1 Logic Gnd	Gnd
2 Logic +5V	+5V
3 Contrast	Pot sweep
4 RS	Pin 6
5 RW	Gnd
6 EN (LCD1)	Pin 7
6 EN (LCD 2)	Pin 8
7
8
9
10
11 DB4	Pin 9
12 DB5	Pin 10
13 DB6	Pin 11
14 DB7	Pin 12
15 Backlight +5V	+5V
16 Backlight Gnd	Gnd

I used one potentiometer to control the contrast on both displays.  All of the connections go to both displays except the enable which has pin 7 going to display 1 and pin 8 going to display 2.

Sample Sketch

I used the following sketch to test that I had both displays wired correctly.  Notice that I had to define the pinouts for LCD1 and LCD2.

#include <LiquidCrystal.h>

LiquidCrystal lcd1(6,7,9,10,11,12);

LiquidCrystal lcd2(6,8,9,10,11,12);

void setup() {

  // put your setup code here, to run once:

lcd1.begin(20, 4);

lcd2.begin(20, 4);

 lcd1.print("Player 1");

 lcd2.print("Player 2");

}

void loop() {

  // put your main code here, to run repeatedly:

 lcd1.setCursor(0,1);

 lcd1.print(millis()/1000);

 delay(1000);

 lcd2.setCursor(0,1);

 lcd2.print(millis()/1000);

 delay(1000);

}