Home appliance control system via the telephone line

many cases it is desirable to turn on or off some appliances, such as air conditioning and heating units before arriving home

Abstract

In many cases it is desirable to turn on or off some appliances, such as air conditioning and heating units before arriving home, this is done by what are known as home automation systems. This project uses the Dual-Tone Multi-Frequency (DTMF) signals used in touch tone telephones, to control multi electronic devices from long distances using the phone.

A practical application case for this system is implemented to control five power electric devices built around an ATmega8 microcontroller. The automated loads can by any appliances, indoor and outdoor loads and lights, landscape sprinkler timers and more using their phones. The system is equipped with a Personal Identification Number (PIN) to assure the security of the operation.

 

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