LCD 128x64 Graphical Display Blue Background SPI Parallel
The LCD 128x64 Graphical Display with a blue background is a versatile screen capable of displaying graphical and text content. It supports both SPI and 8-bit parallel interfaces, making it compatible with various microcontrollers. Commonly used in handheld consoles, industrial systems, and medical devices.
Package Includes:
- 1 x LCD 128x64 Graphical Display (Blue Background)
Features:
- Resolution: 128x64 pixels for rich graphical display
- Interfaces: Supports 8-bit parallel or 4-wire SPI communication
- Modes: Text, graphics, and mixed display modes
- Backlight: Adjustable for visibility under various lighting conditions
- Power Efficient: Low power consumption suitable for battery-powered devices
- High Contrast: Clear and easy-to-read output
- Custom Characters: Built-in character generator for custom symbols
- Temperature Range: Operates in wide environmental conditions
Description:
The ST7920-based graphical LCD supports a 128x64 pixel matrix and is ideal for both text and graphics. It includes a backlight, SPI/Parallel interface options, and is built to function reliably in a range of devices. Features include a high contrast display, customizable characters, and low power consumption.
Principle of Work:
The display receives commands and data via SPI or parallel interface from a microcontroller. It supports multiple display modes, and its character generator allows creation of custom graphics by defining pixel patterns (up to 256 custom characters). These are stored in memory and rendered on screen through the ST7920 controller.
Pinout of the Module:
| Pin | Name | Description |
|---|---|---|
| 1 | VSS | Ground |
| 2 | VDD | Power supply (5V or 3.3V) |
| 3 | VO | Contrast adjustment via potentiometer |
| 4 | RS | Register Select (0 = instruction, 1 = data) |
| 5 | R/W | Read/Write signal (0 = write, 1 = read) |
| 6 | E | Enable signal |
| 7 | PSB | Mode select: 0 = parallel, 1 = SPI |
| 8–15 | DB0–DB7 | Data bus bits (used in parallel mode) |
| 16 | CS1 | Chip select (SPI/Parallel) |
| 17 | CS2 | Optional chip select (parallel or NC) |
| 18 | RST | Reset (active low) |
| 19 | LED-A | Backlight Anode (connect with resistor to 5V) |
| 20 | LED-K | Backlight Cathode (GND) |
Applications:
- Consumer electronics (TVs, monitors, tablets)
- Industrial controls (PLC panels, HMIs)
- Medical devices (monitors, diagnostics)
- Automotive (dashboards, infotainment)
- Gaming (handhelds, arcade machines)
- Instrumentation (oscilloscopes, analyzers)
- Advertising (digital signage, kiosks)
- Military and aerospace (navigation, cockpit displays)
Circuit Diagram:
- RS → Arduino pin 10
- RW → Arduino pin 11
- E → Arduino pin 13
- PSB → GND (for SPI mode)
- VCC/GND → Power supply
- VO → Middle pin of 10K potentiometer
- LED-A → 5V (with resistor)
- LED-K → GND
Library:
- Open Arduino IDE → Sketch → Include Library → Manage Libraries
- Search for “U8g2”
- Select “U8g2 by Oliver” → Click Install
- Once installed, use
#include <U8g2lib.h>in your code
Example Code:
#include <Arduino.h>
#include <U8g2lib.h>
#ifdef U8X8_HAVE_HW_SPI
#include <SPI.h>
#endif
#ifdef U8X8_HAVE_HW_I2C
#include <Wire.h>
#endif
// Example Bitmap for 128x64 screen
static const unsigned char myBitmap [] PROGMEM = {
0xf8, 0xff, 0xff, 0xff, /* ... truncated for brevity ... */ 0x00
};
// You would initialize your U8g2 display here depending on your wiring
// Example: U8G2_ST7920_128X64_F_HW_SPI u8g2(U8G2_R0, /* CS=*/ 10, /* reset=*/ 8);
Replace the U8g2 constructor line with the correct one for your hardware and wiring.
Features:
- Resolution: 128x64 pixels for rich graphical display
- Interfaces: Supports 8-bit parallel or 4-wire SPI communication
- Modes: Text, graphics, and mixed display modes
- Backlight: Adjustable for visibility under various lighting conditions
- Power Efficient: Low power consumption suitable for battery-powered devices
- High Contrast: Clear and easy-to-read output
- Custom Characters: Built-in character generator for custom symbols
- Temperature Range: Operates in wide environmental conditions
Description:
The ST7920-based graphical LCD supports a 128x64 pixel matrix and is ideal for both text and graphics. It includes a backlight, SPI/Parallel interface options, and is built to function reliably in a range of devices. Features include a high contrast display, customizable characters, and low power consumption.
Principle of Work:
The display receives commands and data via SPI or parallel interface from a microcontroller. It supports multiple display modes, and its character generator allows creation of custom graphics by defining pixel patterns (up to 256 custom characters). These are stored in memory and rendered on screen through the ST7920 controller.
Pinout of the Module:
| Pin | Name | Description |
|---|---|---|
| 1 | VSS | Ground |
| 2 | VDD | Power supply (5V or 3.3V) |
| 3 | VO | Contrast adjustment via potentiometer |
| 4 | RS | Register Select (0 = instruction, 1 = data) |
| 5 | R/W | Read/Write signal (0 = write, 1 = read) |
| 6 | E | Enable signal |
| 7 | PSB | Mode select: 0 = parallel, 1 = SPI |
| 8–15 | DB0–DB7 | Data bus bits (used in parallel mode) |
| 16 | CS1 | Chip select (SPI/Parallel) |
| 17 | CS2 | Optional chip select (parallel or NC) |
| 18 | RST | Reset (active low) |
| 19 | LED-A | Backlight Anode (connect with resistor to 5V) |
| 20 | LED-K | Backlight Cathode (GND) |
Applications:
- Consumer electronics (TVs, monitors, tablets)
- Industrial controls (PLC panels, HMIs)
- Medical devices (monitors, diagnostics)
- Automotive (dashboards, infotainment)
- Gaming (handhelds, arcade machines)
- Instrumentation (oscilloscopes, analyzers)
- Advertising (digital signage, kiosks)
- Military and aerospace (navigation, cockpit displays)
Circuit Diagram:
- RS → Arduino pin 10
- RW → Arduino pin 11
- E → Arduino pin 13
- PSB → GND (for SPI mode)
- VCC/GND → Power supply
- VO → Middle pin of 10K potentiometer
- LED-A → 5V (with resistor)
- LED-K → GND
Library:
- Open Arduino IDE → Sketch → Include Library → Manage Libraries
- Search for “U8g2”
- Select “U8g2 by Oliver” → Click Install
- Once installed, use
#include <U8g2lib.h>in your code
Example Code:
#include <Arduino.h>
#include <U8g2lib.h>
#ifdef U8X8_HAVE_HW_SPI
#include <SPI.h>
#endif
#ifdef U8X8_HAVE_HW_I2C
#include <Wire.h>
#endif
// Example Bitmap for 128x64 screen
static const unsigned char myBitmap [] PROGMEM = {
0xf8, 0xff, 0xff, 0xff, /* ... truncated for brevity ... */ 0x00
};
// You would initialize your U8g2 display here depending on your wiring
// Example: U8G2_ST7920_128X64_F_HW_SPI u8g2(U8G2_R0, /* CS=*/ 10, /* reset=*/ 8);
Replace the U8g2 constructor line with the correct one for your hardware and wiring.