Digi-Clock unit is a 2.1-inch 4-digit 7-segment display module designed to display decimal numbers and act as a clock. Each digit on the display has a decimal point, and there is an additional wire for displaying colon-dots in the center, allowing for clock functionality.The unit utilizes the TM1637 as the driver IC, which controls the display and facilitates easy communication with the connected microcontroller or system. The I2C communication protocol is employed, and the unit incorporates an STM32F030 microcontroller for I2C communication.To provide flexibility, the I2C address of the Digi-Clock unit can be modified using a 4-bit dip switch, allowing multiple modules to be connected and addressed individually. This feature simplifies the integration and control of multiple display modules within a system. The red LED display supports eight levels of brightness, providing options for optimal visibility in different environments or applications. Users can adjust the brightness level to meet their specific requirements.Additionally, the unit includes four fixing holes, which allow for secure mounting and integration into various projects or installations. This ensures stability and ease of use when incorporating the Digi-Clock unit into different applications or systems.