Adafruit Monochrome 0.91" 128x32 I2C OLED Display
Adafruit Monochrome 0.91" 128x32 I2C OLED Display is small (only about 1" diagonal) but very readable due to the high contrast of the OLED display. This display comprises 128x32 individual white OLED pixels, each turned on or off by the controller chip. Because the display makes it light, no backlight is required. This reduces the power required to run the OLED, which is why the display has such high contrast. The Adafruit OLED display has been put onto a breakout PCB and support circuitry to let the user use this with 3.3V (Feather/Raspberry Pi) or 5V (Arduino/ Metro328) logic levels.
The design has auto-reset circuitry, so the reset pin is optional. Since it uses I2C, the user can easily connect it with two wires (plus power and ground). The SparkFun qwiic compatible STEMMA QT connectors for the I2C bus are included, so solder is unnecessary. The user can connect a favorite microcontroller. The user should read through the Adafruit detailed tutorial with Arduino and Python/CircuitPython libraries for text and graphics. The user will need a microcontroller with more than 512bytes of RAM since the display must be buffered.
The power requirements depend a little on how much of the display is lit, but on average, the display uses about 20mA from the 3.3V supply. Built into the OLED driver is a simple switch-cap charge pump that turns 3.3V-5V into a high-voltage drive for the OLEDs.
Specifications
- Display details
- 0.91" diagonal screen size
- 128×32 number of pixels
- Monochrome (white) color depth
- COG module construction
- 46.30mm × 11.50mm × 1.45mm module size
- 30.00mm × 11.50mm × 1.45mm panel size
- 22.384mm × 5.584mm active area
- 0.175mm × 0.175mm pixel pitch
- 0.159mm × 0.159mm pixel size
- 1/32 duty
- 150 (Typ) @ 7.25V brightness (cd/m2)
- I2C interface
- Display current draw is completely dependent on usage
- Each OLED LED draws current when on, so the more pixels lit, the more current is used
- They tend to draw ~15mA or so in practice, but for precise numbers, the user must measure the current in their usage circuit
- This board/chip uses I2C 7-bit address 0x3C
- Dimensions
- 20mm x 35mm (0.8" x 1.4") PCB
- 7mm x 25mm display area
- 4mm thickness