keywords: Android phones, microcontroller, bluetooth module, relay, liquid crystal display
Nocturnal voltage spike or surge has been identified as one of the causes of fire incidents in homes. Buildings that are largely hit by this disaster are those whose households forget to switch off all power sources before they go to sleep. Consequences of fire outbreak are more often than not devastating resulting into loss of lives and properties. Hence, there is need for a control system that will allow occupant to switch off home appliances in an easy and fast manner either from the comfort of the bedroom or anywhere in the building to improve safety. This paper presented development of home controlled system which could be operated via ubiquitous android phones for switching off all power sources in a room, offices and business outlets. The system comprised power supply unit, Bluetooth module interfaced with programmable microcontroller for switching on and off appliances via relays based on the input from application on smart phone. The system was implemented on a circuit board after simulation on Proteus software. For the purpose of testing the functionality of the system, six home appliances were used as candidates for testing and the results revealed that the automated control system was functional and could facilitate the switching on and off home appliances without hitches or network delay. The device is recommended for homes, shops, and office outlets.