If you’ve been diggin’ our monochome OLEDs but need something bigger, this display will delight you. These displays are 2.3″ diagonal, and very readable due to the high contrast of an OLED display. This display is made of 128×32 individual blue OLED pixels, each one is turned on or off by the controller chip. Because the display makes its own light, no backlight is required. This reduces the power required to run the OLED and is why the display has such high contrast; we really like this graphic display for its crispness!
The driver chip, SSD1305 can communicate in three ways: 8-bit, I2C or SPI. Personally we think SPI is the way to go, only 4 or 5 wires are required and its very fast. The OLED itself requires a 3.3V power supply and 3.3V logic levels for communication. We include a breadboard-friendly level shifter that can convert 3V or 5V down to 3V, so it can be used with 5V-logic devices like Arduino.
The power requirements depend a little on how much of the display is lit but on average the display uses about 50mA from the 3.3V supply. Built into the OLED driver is a simple switch-cap charge pump that turns 3.3V into a high voltage drive for the OLEDs.
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