2004 LCD Module-(20*4)

A 2004 LCD module is a popular display module in electronics projects, often used for its ability to display a significant amount of information. Here's a brief overview:

Features of a 2004 LCD:

1. Display Format: It has a 20x4 character display, meaning it can show 20 characters per row across 4 rows.
2. Controller IC: Typically uses the HD44780 controller or a compatible one, which makes it easy to interface with microcontrollers like Arduino, Raspberry Pi, or PIC.
3. Power Supply: Operates on 5V DC.
4. Interface: It can communicate via:
   • Parallel interface (4-bit or 8-bit mode).
   • With an I2C module, it requires only 2 pins (SDA and SCL), simplifying wiring.
5. Backlight: Equipped with an LED backlight, often blue with white characters or green with black characters.
6. Adjustable Contrast: Contrast can be controlled using a potentiometer.

Applications:

• Robotics and embedded systems.
• Industrial and home automation.
• Data loggers and measurement devices.
• Educational projects.

Pros:

• Large display for compact designs.
• Easy to interface with most microcontrollers.
• Readily available and inexpensive.