PCF8574 I2C Backpack for LCD 1602/2004

A small adapter board that solders to the back of a standard character LCD and converts its parallel interface to I2C, reducing the wiring from six pins to two. Buy it alongside a plain 1602 or 2004 display, or retrofit it to a display you already own. It also puts contrast adjustment on an onboard trimmer, removing the external potentiometer. Address jumpers let several displays or other I2C devices share the same bus. Reduces an LCD from six wires to two; Retrofits to displays you already own; Onboard contrast trimmer replaces external potentiometer; Address jumpers for multiple devices on one bus