Industrial automation demands efficient material handling and quality control mechanisms to enhance productivity and reduce operational costs. This paper presents the design and implementation of an automated colour-sorting machine using Arduino microcontroller technology integrated with optical colour sensors. The system employs a conveyor belt mechanism that transports objects through a detection zone where a TCS3200 colour sensor identifies the colour of each item. Based on the detected colour signature, the Arduino controller processes the sensor data and activates corresponding servo motors to divert items into designated collection bins. The proposed system achieves high-speed sorting with accuracy exceeding 95%, significantly reducing manual labour requirements and minimizing classification errors. Experimental results demonstrate the system\\\'s effectiveness in sorting multiple colours simultaneously with minimal delay. This automated solution finds applications in food processing, pharmaceutical packaging, recycling industries, and quality control operations where colour-based segregation is essential.