It is a basic prototype of a smart control system for electric energy. The circuit controls the provision of energy in each receiving point of the system like electrical lamps, devices and other devices using the mains like mass media. In this prototype the power station receives the data entered by keyboard, soon these data codifies them, generates a frequency, modulates them and transmits on the alternating signal through the existing electrical wiring towards the receiver located in the same mains which demodulates, detects the frequency and decode the data that via optical connection control the firing of triac activating or deactivating the electrical provision towards the load connected in the receiver. For his complete version one projects to have a programmable power station, that accepts originating data of a PC (local program or page Web), via telephone line (conventional telephony or IP), in these cases the data enter through an interphase. The distance present average of this prototype is of 70 mts, optimizing its yield a maximum distance is considered of 100mts of wiring of the horizontal and vertical mains and it cost is approximately $ 20. (Tx + 1Rx)