2004 LCD – KSH 800 at HIMASTORES Mombasa – best electronics in Kenya
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2004 LCD

SKU: HMJ116 Category: Displays
KSH 800.00
In Stock

Product Description

2004 LCD Display Module

20x4 Character Screen for Arduino and DIY Projects

The 2004 LCD is a 20x4 character display module, providing 4 lines of 20 characters to present text and numbers in Arduino and embedded projects. It is a popular choice when more display space is needed than the standard 16x2 screen [citation:3].

20x4 character display - Ideal for data logging, menus, and status information
Options: Parallel 16-pin and I2C versions available
Operating voltage is typically 5V DC, with 3.3V variants also available [citation:1][citation:7][citation:10]
For easier wiring, choose an I2C variant requiring only 2 signal wires [citation:6][citation:9]

Specifications

ParameterValue
Characters20 x 4 lines
Dots per character5 x 8 [citation:1]
InterfaceParallel (16-pin) or I2C/SPI [citation:1][citation:6][citation:7]
Supply Voltage3.3V or 5V DC [citation:1][citation:7]
Module Size~98 x 60mm [citation:4][citation:10]
Active Area~70 x 20mm [citation:1][citation:4][citation:10]
ControllerHD44780 (parallel) or equivalent [citation:4][citation:10][citation:11]
BacklightBlue, Green, White, Yellow-Green, RGB [citation:4]

= Key Features =

+Known as 20x4 or 2004 LCD, used extensively with Arduino

+Clear display with adjustable contrast and backlight

+Parallel version uses 6 or 10 pins; I2C uses 2 pins

+Compatible with "technical">LiquidCrystal and "technical">LiquidCrystal_I2C libraries

Operating temperature: -20°C to 70°C [citation:1][citation:10]

= Applications =

  1. Data logging displays
  2. Menu and status interfaces
  3. Weather and monitoring stations
  4. Alarm and security systems
  5. DIY and industrial control panels
Versatile character display - Works with many microcontrollers
Userfriendly Easy to program with standard libraries

√ Widely available in parallel and I2C formats

√ Backlight control via software

√ Common choice for Arduino and ESP projects

Connection and Usage

*Parallel (16-pin) version:*

  • Uses pins: VSS, VDD, VO, RS, R/W, E, D0-D7, A, K
  • Requires 6 or 10 GPIO pins [citation:1][citation:3]
  • Uses LiquidCrystal library

*I2C version:*

  • Uses 4 pins: VCC, GND, SDA, SCL [citation:6][citation:9]
  • I2C addresses: 0x27 or 0x3F [citation:9]
  • Uses LiquidCrystal_I2C library
For parallel connection, use a 10kΩ potentiometer to adjust contrast [citation:3][citation:12]
For I2C version, check the address with an I2C scanner sketch
Avoid applying voltage above specified maximum (5.5V or 3.6V)
Do not exceed -20°C to +70°C operating range

Troubleshooting

No display:

  • Check power and contrast adjustment
  • Verify wiring for parallel or I2C connections
  • Ensure library is correctly installed

Garbled characters:

  • Check baud rate and initialization sequence
  • Verify address for I2C version