Description
The PCF8574 I2C LCD Module simplifies the connection of 16x2 or 20x4 character LCDs to your microcontroller by converting the standard parallel interface into an I2C communication interface. This compact adapter reduces the number of GPIO pins required, making it perfect for projects with limited I/O availability. With built-in contrast adjustment and backlight control, this module ensures ease of use and flexibility for DIY electronics and IoT applications.
Features:
- I2C Communication: Reduces the number of pins needed to control an LCD from 12 to just 2 (SDA and SCL).
- PCF8574 IC: Reliable I/O expander chip for stable and efficient communication.
- Compatible with 16x2 and 20x4 LCDs: Works with most standard character LCD displays.
- Adjustable Contrast: Onboard potentiometer for fine-tuning the LCD contrast.
- Backlight Control: Jumper or programmatic control of LCD backlight.
- Plug-and-Play Design: Pre-soldered header pins for easy connection to LCDs.
Specifications
Electrical:
- Operating Voltage: 5V DC
- Interface: I2C (SDA and SCL lines)
- Default I2C Address: 0x27 (adjustable via onboard address jumpers)
Physical:
- Chip: PCF8574 I/O Expander
- Compatible LCDs:
- 16x2 Character LCD
- 20x4 Character LCD
Configuration and Control:
- Contrast Adjustment: Adjustable via onboard potentiometer.
- Backlight Control: Enable/disable using jumper or software.
Applications:
- Display integration for Arduino, Raspberry Pi, ESP8266, ESP32, and other microcontrollers.
- IoT devices requiring efficient LCD communication.
- Prototyping and educational projects with limited GPIO pins.
- Home automation systems with visual interfaces.
Important Notes:
- Ensure the correct I2C address is used in your code (default: 0x27).
- Check the jumper settings to enable or disable the backlight as per your requirement.
- Requires software libraries for seamless I2C communication (e.g., LiquidCrystal_I2C for Arduino).
Package Includes:
- 1 x PCF8574 I2C LCD Module