lamaPLC: LCD 1602/2004

The HD44780 chip-based 1602/2004 LCD module is bright and high-contrast, thanks to its LCD technology, which features a blue-green background. This display is especially suitable for your projects if you need a screen with a wide viewing angle, compact design, and low power consumption. The LCD 1602 can display 16 characters in two rows, while the LCD 2004 can display 20 characters in four rows. Additionally, 1602/2004 displays can be easily connected using an I²C adapter.

LCD 1602 Front Side 16 charachers 2 rows	LCD 1602 Back Side 16 charachers 2 rows	LCD 2004 Front Side 20 charachers 4 rows	LCD 2004 Back Side 20 charachers 4 rows

• Display Mode: STN, BLUB
• Display Format: 16 Characters x 2 Lines
• Viewing Direction: 6 O'clock
• Input Data: 4-Bit or 8-Bit interface available
• Display Font: 5 x 8 Dots
• Power Supply: Single Power Supply (5V±10%)
• Driving Scheme: 1/16 Duty, 1/5 Bias
• Backlight (side): white LED

The LCD1602 employs the Hitachi HD44780 LCD controller chip. This chip features a built-in font and supports the definition of up to 8 custom characters.

There are two variants of the chip's ROM, each with different fonts: HD44780UA00, which contains Japanese katakana characters, and HD44780UA02, featuring Western European characters.

Reduction of the pin requirement for controlling an LCD from 12 pins to 2 pins: This practical module enables quick data transfer and can convert the serial data output of an LCD into an I²C signal. It uses only four pins instead of 16 and provides six selectable I²C addresses, allowing the simultaneous operation of up to 6 displays.

Arduino supports both communication solutions, but obviously, the I²C solution requires many fewer pins from the already limited number of pins.

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