LCD1602 I2C

The LCD1602 I2C display is an upgraded version of the standard 16×2 LCD, equipped with an I2C (Inter-Integrated Circuit) adapter. This reduces the required microcontroller pins from 16+ to just 2 (SDA and SCL), making it highly efficient for projects with limited GPIO availability. It still features 16 characters × 2 lines, each formed on a 5×8 dot matrix, and supports adjustable backlight and contrast.

i2c lcd pcf8574

Key Features:

  • 16×2 character display with I2C interface
  • Requires only 2 pins (SDA, SCL) for communication
  • Works with 5V (some modules support 3.3V)
  • Adjustable backlight and contrast via onboard potentiometer
  • Compatible with Arduino, STM32, ESP32, Raspberry Pi

Applications:

  • IoT and embedded systems with limited GPIOs
  • Compact DIY electronics and hobby projects
  • Home appliances and monitoring systems
  • Industrial devices needing simple text output