The given project describes  how different DTMF tones can be generated using DTMF tone generator chip 91214B  and how these tones can be decoded by DTMF decoder chip MT8870 that generates 4-bit digital output.Using these two circuits together one can build DTMF based remote control application in which 91214B chip is used as remote control and MT8870 is used at the receiver side to decode DTMF tones. The 4 bit digital output of MT8870 can be given to micro controller that will control any device or any application as per the button pressed on 91214B based remote control.