Description
The Serial LCD Module is a convenient display solution that simplifies adding text output to microcontroller projects. This I2C-only version communicates using just two wires (SDA and SCL), drastically reducing GPIO pin usage compared to parallel LCDs. An onboard I2C backpack (typically featuring a PCF8574) handles all low-level LCD timing, allowing the host microcontroller to send commands and text via simple I2C transactions.
Key Features
- I2C serial interface requires only two signal wires (SDA, SCL) plus power and ground
- Compatible with standard HD44780-based character LCDs (16x2)
- Onboard I2C port expander handles all parallel LCD timing automatically
- Adjustable backlight with software on/off control
- Contrast adjustment via onboard potentiometer
- 3.3V and 5V logic compatible
- Uses standard I2C libraries (Wire.h on Arduino, smbus2 on Raspberry Pi)
- Configurable I2C address (typically 0x27 or 0x3F, with solder jumpers for address selection)
- Low power consumption suitable for battery-powered projects
Specifications
- Display type: Character LCD (16x2)
- Communication protocol: I2C (standard mode 100 kHz, fast mode 400 kHz compatible)
- I2C address: Default 0x27 or 0x3F (7-bit address, configurable via solder jumpers A0/A1/A2)
- Operating voltage: 5V DC (for LCD and backlight); I2C logic accepts both 5V and 3.3V signals
- Backlight: LED backlight with software on/off control (via I2C command)
- Contrast control: Onboard trimmer potentiometer (manual adjustment)
- Power consumption (16x2): Approximately 2–5 mA with backlight off; 30–50 mA with backlight on
- Operating temperature range: -20°C to +70°C
- Display dimensions (16x2): Approximately 80mm × 36mm × 12mm
- Display dimensions (20x4): Approximately 98mm × 60mm × 14mm
- I2C backpack dimensions: Approximately 40mm × 17mm × 15mm
Applications
- Embedded systems and microcontroller projects
- DIY electronics and home automation panels
- Robotics status displays and debugging terminals
- Instrument panels for voltage, current, and temperature readouts
- Data logging systems with real-time display
- Prototyping and educational development
- Menu interfaces for user-controlled devices
Datasheet: For detailed technical specifications, refer to the Serial LCD Module Datasheet.