DTMF mobile phone controlled appliances

Many of us, either forgot to switch off all electric devices in our home/Industry or will always be in doubt whether all the electric appliances are switched off or not. In such cases it is essential to have a remote controller that controls the devices from any remote place through a mobile phone. This can be utilized to control either the main power unit of the entire houses, industry or some individual appliances.
The system involves simple digital logic and it cost less than Microprocessor
Controlled systems.. Our system is provided with ten channels through which for devices can be controlled. This can be extended to any number of devices.