Recently Viewed
LCM2002A 20x2 LCD Module Character LCD Display 5V HD44780 Compatible Screen
The LCM2002A is a 20-character × 2-line alphanumeric LCD module widely used in embedded systems, industrial controllers, instruments, and DIY electronics projects. It is based on the HD44780-compatible controller architecture, making it highly compatible with microcontrollers such as Arduino, STM32, PIC, and Raspberry Pi.
This module displays ASCII characters, numbers, and simple symbols, making it ideal for status display, measurement readouts, and simple user interfaces.
20 characters × 2 lines display format
Built-in HD44780-compatible controller (or equivalent)
5×8 dot character matrix
5V standard operation (3.3V compatible variants available)
LED backlight (blue, green, or yellow options depending on version)
4-bit or 8-bit parallel interface
Adjustable contrast via potentiometer
Low power consumption
Simple microcontroller integration
Widely available and cost-effective
| Specification | Details |
|---|---|
| Model | LCM2002A |
| Display Type | Character LCD |
| Display Format | 20×2 characters |
| Controller | HD44780 compatible (or equivalent) |
| Interface | 4-bit / 8-bit parallel |
| Operating Voltage | 5V (typical), 3.3V optional variants |
| Backlight | LED (A/K pins) |
| Character Matrix | 5×8 dots |
| Operating Temperature | -20°C to +70°C |
| Module Size | ~116 × 37 mm (typical class) |
VSS – Ground
VDD – Power supply
RS – Register select
RW – Read/Write control
E – Enable signal
DB0–DB7 – Data bus
A/K – Backlight LED power
Arduino and microcontroller projects
Industrial control panels
Temperature / sensor displays
Power supply monitoring systems
Embedded user interfaces
Test and measurement equipment
DIY electronics projects
The LCM2002A is one of the most widely used character LCD modules because it is:
Extremely easy to integrate
Supported by almost all microcontrollers
Low cost and widely available
Stable and reliable for long-term embedded use
It is ideal for projects that only require text and numeric display, without graphical complexity.
This is a character LCD module only:
It does NOT display graphics or images
It requires correct contrast adjustment to show text
Most “no display but backlight on” issues are caused by contrast voltage (VO pin) not set properly or wiring issues
This is usually due to incorrect contrast adjustment (VO pin) or wiring issues.
Yes, it is fully compatible using HD44780 library support.
Not directly. I2C is only possible via an external adapter module.
Typically 5V DC, with some variants supporting 3.3V.
No, it only displays characters and symbols.
