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How to Use China ST7735S 160x128: Examples, Pinouts, and Specs

Image of China ST7735S 160x128Design with China ST7735S 160x128 in Cirkit Designer

Introduction

The China ST7735S 160x128 is a compact 1.8-inch TFT LCD display module that offers a resolution of 160x128 pixels. It is capable of displaying a wide range of colors, making it suitable for a variety of applications, including smartwatches, handheld gaming devices, and other portable electronic gadgets. Its small form factor and low power consumption make it an ideal choice for battery-powered devices.

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Image of Raspberry Pi Pico Controlled ST7735S Display Module: A project utilizing China ST7735S 160x128 in a practical application
Raspberry Pi Pico Controlled ST7735S Display Module

This circuit connects a Raspberry Pi Pico microcontroller to a China ST7735S 160x128 pixel display. The Pico is configured to provide power (VCC and BL), grounding (GND), and control signals (CS, DC, RES) to the display, as well as SPI communication via SCL and SDA pins for data transfer. The purpose of this circuit is to enable the Raspberry Pi Pico to control and display graphics or text on the ST7735S LCD screen.

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Common Applications and Use Cases

Technical Specifications

Key Technical Details

Pin Configuration and Descriptions

Pin Number Pin Name Description
1 GND Ground
2 VCC Power supply (3.3V - 5V)
3 SCL Serial Clock Line
4 SDA Serial Data Line
5 RES Reset
6 DC Data/Command control
7 CS Chip Select
8 BL Backlight control (optional PWM dimming)

Usage Instructions

How to Use the Component in a Circuit

  1. Power Connections: Connect the VCC pin to a 3.3V or 5V power supply, and the GND pin to the ground.
  2. Data Connections: Connect the SCL and SDA pins to the corresponding SPI clock and data lines on your microcontroller.
  3. Control Connections: Connect the RES, DC, and CS pins to available digital I/O pins on your microcontroller.
  4. Backlight: Optionally, connect the BL pin to a PWM-capable pin for backlight control.

Important Considerations and Best Practices

Example Code for Arduino UNO

#include <Adafruit_GFX.h>    // Core graphics library
#include <Adafruit_ST7735.h> // Hardware-specific library for ST7735

// Pin definitions
#define TFT_CS     10
#define TFT_RST    9
#define TFT_DC     8

// Initialize Adafruit ST7735S
Adafruit_ST7735 tft = Adafruit_ST7735(TFT_CS, TFT_DC, TFT_RST);

void setup() {
  tft.initR(INITR_BLACKTAB);      // Initialize display with black tab
  tft.fillScreen(ST7735_BLACK);   // Fill screen with black color
}

void loop() {
  tft.setCursor(0, 0);            // Set cursor at top-left corner
  tft.setTextColor(ST7735_WHITE); // Set text color to white
  tft.setTextWrap(true);          // Set text to wrap at end of line
  tft.print("Hello, World!");     // Print a message to the screen
}

Ensure you have installed the Adafruit_GFX and Adafruit_ST7735 libraries before uploading this code to your Arduino UNO.

Troubleshooting and FAQs

Common Issues

Solutions and Tips for Troubleshooting

FAQs

Q: Can I use this display with a 5V microcontroller? A: Yes, but you will need to use a level shifter for the data lines to convert the logic level to 3.3V.

Q: How can I control the brightness of the backlight? A: You can control the brightness by applying a PWM signal to the BL pin.

Q: What library should I use with this display? A: The Adafruit_GFX and Adafruit_ST7735 libraries are recommended for use with this display.

Q: Is it possible to display images or animations? A: Yes, the display is capable of showing images and animations. You will need to use the appropriate functions provided by the library to do so.