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This paper proposes a system for controlling bulbs and electrical appliances in order to imitate the availability of the owner in a house. The designed system is able to turn on and turn off the equipments randomly for treating the availability of the owners in their houses. The system generates a number randomly every 15 minutes. Each number associated with bulb or electrical device in the controlling list. The electrical devices will be ON or OFF based on specific duration times. The system is realized using an Arduino board, an RTC, power supply unit, and interface circuit of Arduino and electrical devices. The designed system has been tested for 5 consecutive days normalized to 2 hour normal time on the control device and house miniature. The miniature is used to mimic condition the real house. Electric consumption estimated about 0.42 kWh per day