Adafruit monochrome 128 x 3264 oled graphic displays adafruit 931 the adafruit monochrome 128 x 32 i2c oled graphic displays give any microcontroller main board a 128 x 32 monochrome oled display all this takes just the 2 x i2c signals plus 2 x power lines the oled displays have individual led pixels which generate their own light so theres no backlight and very high contrast even though the displays are only 23mm diagonally theyre very clear and crispadafruit supply a free tutorial an