The rapid advancement of Internet of Things (IoT) technology has enabled the development of intelligent home automation systems that enhance user convenience, accessibility, and energy efficiency. This paper presents the design and implementation of a Smart Home Automation System that allows users to control household electrical appliances - specifically a fan and a light - using both voice commands and a manual push button switch. The system is built around a microcontroller (Arduino UNO or ESP32) integrated with a relay module, a Bluetooth communication interface (HC-05), and a mobile application for voice input processing. Voice commands such as Fan On, Fan Off, Light On, and Light Off are transmitted wirelessly via Bluetooth and processed in real time by the microcontroller, which activates or deactivates the corresponding relay channels. A manual push button switch is incorporated as a fallback control mechanism. Experimental evaluation demonstrates a command accuracy of 95-98%, average response time of 200-500 milliseconds, and system reliability of 97-99%, confirming the feasibility of the proposed architecture for smart home applications.