16×2 LCD Display with I2C Interface – Yellow-Green Backlight
₹153.40 incl. GST (₹130.00 + GST)
16×2 LCD Display with I2C Interface – Yellow-Green Backlight
Product Description
The 16×2 LCD Display with I2C Interface is a compact character display designed for Arduino, ESP32, Raspberry Pi, embedded systems, industrial controls, and DIY electronics projects. It features a classic yellow-green backlight with black characters for clear and easy-to-read information.
The display includes a pre-soldered PCF8574 I2C backpack, reducing the required wiring to VCC, GND, SDA, and SCL. This makes it easier to connect the LCD while saving valuable GPIO pins on the microcontroller.
Easy I2C Interface
The built-in I2C interface simplifies LCD communication compared with traditional parallel wiring. Multiple I2C devices can share the same bus, making the module suitable for projects that require sensors, displays, and other peripherals simultaneously.
The commonly used I2C addresses are 0x27 or 0x3F, depending on the backpack version.
High Visibility Display
The LCD provides 16 characters across 2 lines with black text on a bright yellow-green background. The high-contrast display is suitable for indoor projects, instrumentation, status indicators, and outdoor applications where clear text visibility is required.
Adjustable Contrast
A built-in contrast potentiometer on the I2C backpack allows the display contrast to be adjusted. This helps optimize character visibility under different lighting and viewing conditions.
Key Features
- 16×2 character LCD display
- Yellow-green backlight with black text
- Pre-soldered PCF8574 I2C interface
- Simplified 4-pin connection
- Supports SDA and SCL communication
- Saves microcontroller GPIO pins
- Adjustable contrast potentiometer
- 5V DC operation
- Compatible with Arduino and other microcontrollers
- Suitable for sensors, status displays, and control systems
Technical Specifications
| Feature | Specification |
|---|---|
| Display Type | 16×2 Character LCD |
| Backlight Color | Yellow-Green |
| Text Color | Black |
| Interface | I2C / IIC |
| Controller | PCF8574 |
| Operating Voltage | 5V DC |
| Common I2C Address | 0x27 or 0x3F |
| Pins | GND, VCC, SDA, SCL |
| Contrast Control | Onboard Potentiometer |
Working Principle
The LCD displays text and characters according to data received through the I2C communication interface. The PCF8574 backpack converts the serial I2C signals from the controller into the parallel signals required by the LCD.
This allows the display to be controlled using only the SDA and SCL communication lines, along with power and ground.
Connection Interface
The module provides four main connections:
- GND: Ground
- VCC: 5V Power
- SDA: I2C Data
- SCL: I2C Clock
Typical Application Scenarios
Industrial Control
Suitable for displaying machine status, operating values, counters, and system messages.
Weather Stations
Can display temperature, humidity, pressure, and other environmental readings.
Educational Projects
Useful for learning LCD interfacing and I2C communication with Arduino and other development boards.
Sensor Displays
Ideal for displaying real-time sensor values, measurement results, and system status information.
Applications
- Arduino projects
- ESP32 projects
- Raspberry Pi projects
- Industrial displays
- Weather stations
- Sensor monitoring
- Embedded systems
- Automation projects
- Robotics
- Data logging systems
- DIY electronics
- Educational projects
- Machine status displays
Package Includes
- 1 × 16×2 LCD Display Module with Yellow-Green Backlight
- 1 × Pre-Soldered I2C Interface / PCF8574 Backpack
Product Disclaimer
Product information provided on our website may vary between manufacturers and production batches. Please verify the actual module specifications before integrating it into a critical application.
Product images are for illustrative purposes only and may differ from the actual product in colour, component placement, or other visual details.
Important Note
I2C Address
The common I2C addresses are 0x27 and 0x3F, but the actual address may vary depending on the installed PCF8574 backpack. An I2C scanner can be used to identify the correct address.
Contrast Adjustment
If the display shows only dark blocks or the characters are not visible, gently adjust the onboard contrast potentiometer until the text becomes clear.
Voltage
The specified operating voltage is 5V DC. Ensure the supply and connected controller are compatible with the module.
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Frequently Asked Questions
1. What is this LCD display?
It is a 16×2 character LCD with a pre-soldered PCF8574 I2C interface.
2. How many characters can it display?
It can display 16 characters on each of 2 lines.
3. What voltage does it use?
The specified operating voltage is 5V DC.
4. What communication interface does it use?
It uses the I2C/IIC interface through SDA and SCL.
5. What are the common I2C addresses?
The commonly used addresses are 0x27 and 0x3F.
6. Can I use it with Arduino?
Yes. It is commonly used with Arduino and compatible microcontrollers.
7. Can I use it with ESP32?
Yes, provided the I2C and voltage requirements are correctly handled.
8. Does the module save GPIO pins?
Yes. The I2C interface significantly reduces the number of microcontroller pins required compared with parallel LCD wiring.
9. Can the contrast be adjusted?
Yes. The I2C backpack includes an onboard contrast potentiometer.
10. What should I do if only blocks appear on the display?
Adjust the contrast potentiometer and verify the correct I2C address, such as 0x27 or 0x3F.
11. What are the four pins?
The pins are GND, VCC, SDA, and SCL.
12. Is the I2C backpack already installed?
Yes. The module is supplied with the PCF8574 I2C backpack pre-soldered.Only logged in customers who have purchased this product may leave a review.
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