The LCD2004 is a 20×4 character liquid crystal display module that shows up to 80 letters, numbers, or symbols across four rows. It operates on 5V power and typically uses an HD44780 controller. Many versions include an I2C adapter module to reduce wiring from 16 pins down to just 4.
Technical Specifications
- Display Format: 20 characters by 4 lines
- Operating Voltage: 5V DC
- Default Interface: Parallel (4-bit/8-bit) or I2C via PCF8574 adapter
- Backlight: Blue or green with white/black text
- Contrast: Adjustable via built-in blue potentiometer
- I2C Address Range:
0x20–0x27or0x38–0x3F(commonly0x27or0x3F)
