Description
Product Overview
The 0.91-inch I2C OLED Display Module is a compact, high-contrast monochrome graphic display designed for embedded projects requiring crisp visual output without consuming excessive power or I/O pins. Powered by the SSD1306 driver IC and featuring a clear 128×32 pixel resolution, this display delivers bright yellow text, simple graphics, and status icons on a true black background .
OLED (Organic Light Emitting Diode) technology requires no backlight, as each pixel emits its own light. This self-emissive design provides true blacks (inactive pixels are completely off), excellent contrast, and wide viewing angles – ensuring the display remains readable from virtually any angle .
The module uses the ultra-simple 4-pin I2C interface (VCC, GND, SCL, SDA), requiring only two data lines to connect to your microcontroller. This preserves valuable I/O pins for other sensors and peripherals. With support for both 3.3V and 5V logic, it is directly compatible with Arduino, ESP32, ESP8266, Raspberry Pi, STM32, and most other development boards – no level shifters required .
With an ultra-narrow PCB design (approximately 38×12mm), this module is specifically suited for wearable devices, mini consoles, IoT gadgets, and other space-constrained projects .
Key Features
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0.91-Inch Active Area: 128×32 pixel resolution with a compact 38×12mm PCB – fits easily into tight spaces
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Yellow Monochrome OLED: Bright yellow pixels on true black background provide excellent contrast and a distinctive, warm visual appearance
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SSD1306 Driver IC: Industry-standard controller with built-in 128×32-bit SRAM display buffer and on-chip oscillator
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I2C Interface: 4-pin connection (VCC, GND, SCL, SDA) requires only 2 data lines – saves valuable I/O pins
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Wide Voltage Compatibility: Operates on DC 3.3V – 5V, compatible with both 5V (Arduino) and 3.3V (ESP32/ESP8266) systems
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Ultra-Low Power Consumption: 13-26mA typical operating current; unlit pixels draw no power – ideal for battery-powered projects
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Wide Operating Temperature: Rated for -40°C to +80°C, suitable for industrial and outdoor applications
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Full Frame Buffer: Only 512 bytes of RAM required (128×32÷8), ideal for memory-constrained microcontrollers
Technical Specifications
| Parameter | Operating Value |
|---|---|
| Display Type | OLED (Organic Light Emitting Diode), Passive Matrix |
| Resolution | 128 × 32 pixels |
| Display Color | Yellow (monochrome) |
| Driver IC | SSD1306 |
| Communication Protocol | I2C (IIC) |
| I2C Address (Default) | 0x3C (7-bit) / 0x78 (write) |
| Operating Voltage | DC 3.3V – 5V |
| PCB Dimensions | 35.8 × 12.0 × 2.41 mm |
| Active Area | 22.384 × 5.584 mm |
| Pixel Pitch | 0.175 × 0.175 mm |
| Typical Current | 13-15mA @ 3V, ~25mA @ 5V |
| Operating Temperature | -40°C to +80°C |
| Storage Temperature | -40°C to +85°C |
| Drive Duty | 1/32 Duty |
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