Arduino Code for Buffalo II DAC: LCD Connection
(Click diagram for larger view)
For a good tutorial in hooking up a “standard” LCD to Arduino and use the standard LCD library, see: LadyAda Tutorial on LCDs
The diagram shows the basic connections with a “standard” LCD that is also compatible with the current Arduino LCD library. Adjustment for the contrast is manual with a pot. As shown, there is no adjustment for brightness. The LCD will always be at full brightness.
You can adjust the brightness by limiting the current through the GND pin of the LCD (pin 16) with the following circuit. Adjusting the pot will increase or decrease the brightness of the LCD.