Monochrome 128x32 SPI OLED Graphic DisplayThese small but highly readable monochrome OLED displays measure about 1" diagonal, offering a crisp, high contrast 128x32 pixel resolution. The white OLED pixels are individually controlled by the SSD1306 driver chip that communicates via SPI. The OLED display requires a 3. 3V power supply and logic levels. To ease integration with 5V microcontrollers such as Arduino, a 3. 3V regulator and level shifter is included on the board. The power consumption