JHD 128x64 Graphic LCD Module - Blue Backlight

Specifications:

• Resolution: 128 x 64 Pixels
  
• Controller: JHD12864 series
  
• Backlight: Blue LED with White Pixels
  
• Operating Voltage: 5V DC
  
• Interface: Parallel (8-bit) or Serial (SPI) mode support
  
• Viewing Area: Approx. 72mm x 40mm
  
• Module Dimension: 93mm x 70mm x 13mm
  
• Operating Temperature: -20°C to +70°C

Key Applications & Projects

• Industrial Control Panels: Display real-time sensor graphs and system status.
  
• Audio Visualizers: Build a custom music spectrum analyzer.
  
• Retro Gaming: Create a handheld console for monochrome classics like Pong or Snake.
  
• Weather Stations: Display temperature trends and weather icons simultaneously.

Project Evolution 

• Past Projects (Prerequisites): If you have mastered the basic 16x2 Character LCD and want more creative freedom, this is your next step.
  
• Feature Upgrade: This product unlocks the ability to draw shapes (circles, lines), render custom bitmaps/logos, and use multiple font sizes in a single interface.
  
• Effort/Requirements: Intermediate. You will need a basic understanding of SPI or Parallel wiring and the "U8g2" or "U8glib" libraries.

Virtual Technician & Wiring

Safety Warning: Ensure the backlight current-limiting resistor is respected to avoid burnout.

JHD 12864 LCD Pinout Table

Package Includes:
1 X JHD 128x64 Graphic LCD Module - Blue Backlight
 

Frequently Asked Questions (FAQ)

1. Can I use this with a 3.3V ESP32?
   Yes, but use level shifters for logic pins and power the VCC with 5V.
2. What library is best for Arduino?
   We highly recommend the U8g2 library.
3. How do I switch between Serial and Parallel mode?
   This is controlled by the PSB pin (High for Parallel, Low for Serial).
4. Does it support Chinese or special characters?
   Yes, the ST7920 controller has built-in fonts for multiple languages.
5. Why is my screen blank?
   Check the 10K potentiometer connected to the VO/VEE pin; contrast is likely too low.
6. What is the current consumption?
   Approximately 100mA with the backlight at full brightness.
7. Can I dim the backlight?
   Yes, by using a PWM signal on the LED+ pin.
8. What is the pixel pitch?
   Typically 0.48mm x 0.48mm.
9. Is it sunlight readable?
   It is visible in daylight, but best suited for indoor or shaded environments.
10. Does it come with headers soldered?
    No, standard 2.54mm headers must be soldered manually.
11. Can it display images?
    Yes, you can convert BMP files to HEX arrays for display.
12. What is the refresh rate?
    Sufficient for UI menus, though not intended for high-speed video.
13. Is the backlight replaceable?
    No, the backlight is integrated into the LCD structure.
14. What is the VEE pin used for?
    It provides negative voltage for contrast adjustment.
15. Can I use it with Raspberry Pi?
    Yes, via the Python Luma.LCD library.
16. Is it compatible with 8051 microcontrollers?
    Yes, it is a classic choice for 8051 projects.
17. What happens if I reverse the polarity?
    Reverse polarity will likely damage the onboard controller instantly.
18. Does it have a touch screen?
    No, this is a display-only module.
19. What is the weight?
    Approximately 150 grams.
20. Is this an original JHD part?
    Yes, we source genuine JHD components for reliability.