16x2 LCD Display Blue Backlight (JHD162A)

Description

The 16x2 LCD Display (Blue Backlight) is an industry-standard alphanumeric display module, widely recognized by its JHD162A model designation. It is capable of displaying 16 characters across 2 separate lines, making it the perfect screen for outputting sensor data, user menus, or system statuses in custom electronics projects.

Available at Tomson Electronics, this module features a highly visible bright blue LED backlight with crisp white text. It utilizes the ubiquitous HD44780 parallel interface chipset, meaning it is universally supported by out-of-the-box libraries for Arduino, Raspberry Pi, ESP32, and STM32 microcontrollers. Whether you are building a custom water quality monitoring system or an interactive robotics dashboard, this display provides reliable, high-contrast visual feedback.

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Specifications

• Model: JHD162A (Standard 1602)
• Display Format: 16 Characters x 2 Lines
• Background Color: Blue
• Text Color: White
• Operating Voltage: 5V DC
• Controller: HD44780 (or equivalent compatible)
• Interface: 16-Pin Parallel (Can be converted to I2C with an expander)

Applications

• Sensor Readouts: Displaying real-time metrics like pH, temperature, or total dissolved solids in environmental monitoring systems.
• User Interfaces: Creating navigational menus for 3D printers, CNC machines, or custom automated test equipment.
• Prototyping: The ultimate beginner-friendly display for learning how to program data outputs on Arduino microcontrollers.
• Embedded Systems: Providing fault codes and operational status in industrial automation panels.

Frequently Asked Questions (FAQ)

Q: My screen lights up, but I only see solid white blocks. Is it broken?
A: It is likely just a contrast issue! You need to adjust the text display contrast directly (rather than the LED backlight level). This is done by wiring a 10k potentiometer to Pin 3 (V0) on the display. Turning the potentiometer will fade the solid blocks out and bring your text into focus.

Q: Does this use up a lot of pins on my microcontroller?
A: In its standard parallel configuration, it requires at least 6 digital I/O pins. However, you can solder a common IIC/I2C expander module to the back of this display. This reduces the wiring to just 4 pins (VCC, GND, SDA, SCL). Note that most of these standard I2C backpack modules default to an active hardware interface address of 0x27 in your code.

Q: Can it display custom characters or graphics?
A: It cannot display full graphics or images. However, you can create and store up to 8 custom 5x8 pixel characters in its CGRAM (Character Generator RAM) to display special symbols like battery icons, degree symbols, or small stick figures.

Package Includes

• 1 × 16x2 LCD Display Blue Backlight (JHD162A)

Description

The 16x2 Character LCD Display with green backlight is a standard alphanumeric display module capable of showing 2 lines with 16 characters each. Based on the industry-standard HD44780 controller, it is fully compatible with Arduino, Raspberry Pi, and other microcontrollers for displaying text, sensor data, menus, and debugging information.

Specifications

• Display Type: 16 characters × 2 lines
• Backlight Color: Blue with black characters
• Controller: HD44780 or compatible
• Interface: 4-bit or 8-bit parallel (TTL logic)
• Operating Voltage: 5V DC
• Character Format: 5x8 dot matrix
• Dimensions: ~80mm × 36mm
• Pin Header: 16-pin standard connection

Applications

• Arduino display projects
• DIY electronics dashboards
• Sensor output and menu interfaces
• Prototyping and educational kits

Usage Notes

• Use a 10K potentiometer to adjust contrast (VO pin).
• Compatible with LiquidCrystal library in Arduino IDE.
• Can be paired with I2C backpack module to reduce pin usage.