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Views: 222 Author: Tina Publish Time: 2025-04-01 Origin: Site
Content Menu
● Introduction to LCD 12864 Module
>> Key Features
>> Applications
● Specifications of LCD 12864 Module
● How to Set Up the LCD 12864 Module
>> Step 1: Understanding the Pin Diagram
>> Step 2: Choosing the Interface Mode
>> Step 3: Connecting the Module
● Common Issues and Troubleshooting
>> 3. Flickering or Unstable Display
>> 4. Incorrect Characters or Graphics
● Advanced Applications and Customization
>> Custom Graphics and Animations
>> Integration with Sensors and Other Devices
>> 1. What is the resolution of the LCD 12864 module?
>> 2. Can I use the LCD module with Arduino?
>> 3. How do I adjust the contrast of the display?
>> 4. What is the operating voltage of the LCD module?
>> 5. What are common applications of this module?
The LCD 12864 module is a versatile graphical display with a resolution of 128x64 pixels, commonly used in embedded systems. This article will guide you through its features, specifications, and practical applications, including interfacing with microcontrollers like Arduino. By the end of this article, you will understand how to utilize this module effectively and troubleshoot common issues.
The LCD 12864 is a monochrome graphical display module capable of showing text, graphics, and even simple animations. It is widely used in electronics projects due to its affordability and versatility. The module can operate in parallel or serial modes, making it compatible with various microcontrollers.
- Resolution: 128x64 pixels.
- Display Type: Monochrome (STN or FSTN technology).
- Backlight: LED-based side white backlight.
- Interface: Parallel (8-bit or 4-bit) or SPI (Serial Peripheral Interface).
- Operating Voltage: Typically 5V.
- Controller IC: Commonly ST7920 or NT7108C.
- Embedded systems interfaces.
- Industrial control panels.
- DIY electronics projects.
- Educational tools for learning microcontroller programming.
Below is a table summarizing the essential specifications of the LCD 12864 module:
| Feature | Specification |
|---|---|
| Resolution | 128x64 pixels |
| Display Type | Monochrome (STN/FSTN) |
| Backlight | LED (side white) |
| Interface | Parallel (8-bit/4-bit) or SPI |
| Operating Voltage | 5V |
| Controller IC | ST7920 or NT7108C |
| Viewing Angle | Optimal at 6:00 |
| Operating Temp | -20°C to 70°C |
The LCD module typically has a set of pins for power, data communication, and control. Below are the common pin descriptions:
| Pin No. | Name | Function |
|---|---|---|
| 1 | VSS | Ground |
| 2 | VDD | Power Supply (+5V) |
| 3 | VO | Contrast Adjustment |
| 4 | RS | Register Select (Instruction/Data) |
| 5 | RW | Read/Write Selection |
| 6 | E | Enable Signal |
| 7-14 | DB0-DB7 | Data Bus (8-bit parallel) |
| 15 | CS1 | Chip Select for Segment Driver |
| 16 | CS2 | Chip Select for Segment Driver |
| 17 | RST | Reset Signal |
| 18 | VEE | Negative Voltage (-10V) |
| 19 | LED+ | Backlight Power (+5V) |
| 20 | LED- | Backlight Ground |
The LCD module can operate in:
1. Parallel Mode: Requires more pins but offers faster data transfer.
2. Serial Mode (SPI): Requires fewer pins but slower data transfer.
For parallel mode:
- Connect DB0–DB7 pins to microcontroller data pins.
- Connect RS, RW, and E to control pins on the microcontroller.
For SPI mode:
- Connect RS to Chip Select (CS), RW to Serial Data In, and E to Serial Clock.
Use a potentiometer connected to the VO pin to adjust the screen contrast. Proper contrast adjustment is crucial for clear visibility of the display content.
Check power connections (VDD and VSS). Ensure proper voltage supply (5V). Also, verify that the backlight is properly connected if it is a separate circuit.
Adjust the potentiometer connected to VO for optimal contrast. If the display remains unclear, ensure that the VO pin is not shorted to VDD or GND.
Verify connections and ensure proper grounding. Use shielded cables if necessary to reduce electromagnetic interference.
Ensure correct initialization of the controller IC and use appropriate libraries like U8g2 for Arduino. Check the data bus connections to ensure they are not swapped.
Unfortunately, some LCD panels may have dead pixels (pixels that are always off) or stuck pixels (pixels that are always on and displaying the wrong color). A few dead or stuck pixels are often considered acceptable by manufacturers, but if there are many of them or if they are in a noticeable location, you may want to consider returning the display for a replacement.
The LCD 12864 module allows for creating custom graphics and animations by manipulating individual pixels. This can be achieved by using libraries that support pixel-level control, such as the U8g2 library for Arduino.
You can enhance your project by integrating sensors or other devices. For example, displaying temperature readings from a thermistor or showing real-time data from a GPS module.
For battery-operated projects, consider using power-saving techniques like turning off the backlight when not needed or using low-power modes if supported by your microcontroller.
The LCD 12864 module is an excellent choice for graphical displays in embedded systems due to its flexibility and ease of use. By understanding its features, specifications, and setup process, you can integrate this module into your projects effectively. Whether you're displaying text, graphics, or animations, this module provides reliable performance across various applications.
The resolution is 128x64 pixels.
Yes, it is compatible with Arduino via both parallel and SPI interfaces.
Use a potentiometer connected to the VO pin for contrast adjustment.
The operating voltage is typically +5V.
Applications include industrial control panels, DIY electronics projects, and embedded systems interfaces.
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[2] https://newhavendisplay.com/128x64-graphic-lcd-module-stn-blue-display-with-white-backlight-negative-voltage/
[3] https://display-module.com/the-ultimate-guide-to-lcd-display-module-replacement-find-the-perfect-screen-for-your-project/
[4] https://www.az-delivery.de/en/products/128x64-lcd-blaues-display
[5] https://docs.cirkitdesigner.com/component/5eb52131-4c5a-e21f-ca3f-ded2c3a54230/graphic-lcd-display-glcd-128x64
[6] https://lonelybinary.com/blogs/learn/troubleshooting-liquid-crystal-lcd-with-i2c-backpack
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[8] https://www.seetron.com/archive/pdf/g12864.pdf
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[10] https://www.youtube.com/watch?v=aACOC9XBBks
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[13] https://www.instructables.com/Testing-a-Graphic-LCD-Module/
[14] https://panda-bg.com/resources/prod_2430_2136-091885-lcd-module-tg12864d0-04wa0-128x64-fstn.pdf
[15] https://www.aliexpress.com/i/32815375122.html
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[17] https://www.youtube.com/watch?v=NURK5bfwdE8
[18] https://www.microtech-lcd.com/news/270.html
[19] https://forum.arduino.cc/t/what-driver-runs-my-lcd12864-128x64/136396
[20] http://aitendo3.sakura.ne.jp/aitendo_data/product_img/lcd/oled/AD-12864-SPI/AD-12864-SPI%20LCD%20Module%20User%20ManualV1.pdf
