sms to control appliances

[SOUBHIK KUMAR DEY]

Dear Sir,

 

I am making a project to control 4 appliances by sending sms. I have connected the TX and Rx pin of SIM900 module to Rx and Tx PIN of Atmega 8 respectively for sms communication.

 

Sir, could you please send me the COMPLETE CIRCUIT DIAGRAM to interface Atmega 8 or Atmega 16 with Relay Driver circuit to control 4 appliances like bulb, fan,etc. And if possible any PCB diagram?

 

Thanks and Regards,

Soubhik.

 

 

[Hari Prasaath K]

For Controlling the home appliances through gsm you can check the link below from engineersgarage..

http://www.engineersgarage.com/contribution/gsm-based-ac-appliance-control

[Ashutosh Bhatt]

it is very easy to connect any bulb or light or fan to relay. use the relay contact terminal as normal switch

and it is very easy to drive relay using AVR micro controller. just u need either ULN2003A chip or simple NPN transistors

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