Abstract:

By using Laser Beam we can communicate or transmit the signal from one end to another end. First of all electrical signal is converted into light and then transmitted to far end in open space. In the receiver end laser detector is used to sense the signal. By using this technique without any hardware media we can send the voice signal without any loss for long distance. In our proposed system voice and load control operation is carried on.  To control the different electrical load DTMF coding technique is used. In transmitter side mic, DTMF Generator, Mixer Unit and laser source are used to transmitted signal. In receiver side, LDR Based opto source, DTMF Decoder, amplifier and switching relay are used to re produced the audio signal and decode the control signal.