0.91 Inch 128×32 White OLED Display

0.91 Inch 128×32 White OLED Display Module (SSD1306, I2C) is a compact and highly efficient graphical interface perfect for space-constrained embedded projects and wearable technology. This display leverages Organic Light Emitting Diode (OLED) technology, allowing each pixel to emit its own light; consequently, it requires no bulky backlight, delivering true black levels and an exceptionally high contrast ratio. You can easily integrate this 128×32 pixel module into any microcontroller-based system, such as Arduino or Raspberry Pi, using the streamlined I2C communication protocol, therefore minimizing the required GPIO pins and simplifying wiring. Furthermore, its white-on-black presentation ensures crystal-clear readability across wide viewing angles, making it an optimal choice for battery-powered, low-power applications.

Key Features:

• High Contrast Ratio: Achieve deep blacks and brilliant whites because the OLED pixels emit light directly, resulting in superior visual clarity over conventional LCDs.
• Ultra-Compact Size: The 0.91-inch diagonal screen size offers a small footprint, ideal for devices where space optimization is critical.
• Low Power Consumption: OLED technology requires significantly less power than backlit displays, thus extending battery life in portable electronics.
• I2C Communication: Uses the I²C (or IIC) serial interface, requiring only two data pins (SDA and SCL) for full control, freeing up valuable microcontroller pins.
• SSD1306 Driver: This display uses the industry-standard SSD1306 controller, ensuring extensive support from open-source libraries like Adafruit GFX and U8g2.

Technical Specifications:

• Display Type: Passive Matrix Organic Light Emitting Diode (PMOLED)
• Resolution: 128 × 32 pixels
• Driver IC: SSD1306
• Interface Protocol: I²C (or IIC), 4-Pin
• Display Color: White Monochrome
• Operating Voltage: 3.3 V to 5 V DC (Wide voltage support)
• Viewing Angle: Typically ≥ 160°
• Operating Temperature Range: −40°C to +85°C

Mechanical Specifications:

• Panel Type: COG (Chip on Glass) + PCB Module
• Connection Type: 4-pin Male Pin Header (2.54 mm pitch)
• Display Mode: Passive Matrix
• Durability: Highly resistant to environmental factors within specified temperature limits.

Dimensions:

• Module Dimensions (PCB): ≈ 38.0 mm × 12.0 mm
• Active Area: ≈ 22.384 mm × 5.584 mm
• Diagonal Screen Size: 0.91 inches (23.11 mm)
• Weight: ≈ 2 g (Extremely lightweight)

Pinout and Wiring:

• GND: Connect this pin to the common ground (0 V) of the control circuit.
• VCC: Supply the power voltage here (typically 3.3 V or 5 V DC).
• SCL (Serial Clock): Connect this pin to the microcontroller’s I²C Clock line.
• SDA (Serial Data): Connect this pin to the microcontroller’s I²C Data line.
• Wiring Note: The module typically includes onboard pull-up resistors for the I²C lines, therefore simplifying the connection to most microcontrollers.

Datasheet Reference:

• Download SSD1306 OLED Driver Datasheet

Commonly Used in:

• Wearable Devices: Integrate it easily into smartwatches, fitness trackers, and smart rings due to its small size and low power needs.
• Portable Diagnostic Tools: Provide clear status readouts and simple menus in handheld measurement equipment.
• IoT Sensor Nodes: Display real-time data from environmental sensors, battery status, or network connection information.

Applications:

• Microcontroller User Interfaces: Create simple, elegant user interfaces for projects built on Arduino, ESP32, and STM32 platforms.
• Battery-Powered Readouts: Display critical information while maximizing operational time, because the display draws minimal current.
• Status Indicators: Use it to clearly show system status, error codes, or operation modes in compact embedded systems.

Equivalent Models:

• SH1107 128×64 OLED: However, this is a slightly larger, 128×64 module, but it often uses similar libraries and is often considered an upgrade option.
• Generic SSD1306 0.91-inch OLED: Other manufacturers produce modules with identical specifications and pinouts.
• 0.91 Inch 128×32 Blue OLED: Functionally identical, only differing in the emitted pixel color.

Package Includes:

• 1 x 0.91 Inch 128×32 White OLED Display Module (I2C)