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RTC LCD Digital Clock

Requires ,

This project creates a digital clock using an Arduino, real-time clock module, and colour LCD display.

The RTC LCD Digital Clock shows the current time on a bright colour screen. It uses a special timekeeping chip that keeps accurate time even when powered off. The Arduino connects all components together and updates the display only when the time changes, which saves power and prevents screen flicker.

Parts List

  1. Arduino board
  2. Real-Time Clock module
  3. ST7789 240×240 TFT LCD display
  4. Connecting wires
  5. Breadboard
  6. 5V power supply for Arduino

Assembly Instructions

  1. Connect the RTC module to the Arduino
    • Connect VCC of the RTC module to 5V on Arduino
    • Connect GND of the RTC module to GND on Arduino
    • Connect SDA of the RTC module to SDA (A4) on Arduino
    • Connect SCL of the RTC module to SCL (A5) on Arduino
  2. Connect the TFT LCD display to the Arduino
    • Connect VCC of the LCD to 5V on Arduino
    • Connect GND of the LCD to GND on Arduino
    • Connect CS pin of the LCD to digital pin 10 on Arduino
    • Connect RST pin of the LCD to digital pin 7 on Arduino
    • Connect DC pin of the LCD to digital pin 8 on Arduino
    • Connect SDA pin of the LCD to MOSI pin on Arduino
    • Connect SCK pin of the LCD to SCK pin on Arduino