how to use single button (switch) for controlling appliances using intrupt

[prashanttyagi85]

dear all
i just want to know that how can i control the different appliances using a single switch with the help of interrupt. let if i press the switch one time then it should make on a light, second time then fan, third time than ac & so on upto minimum 12 appliances

 

[jeffrey samuel]

Dtmf encoding of the switch is a nice option but i don't know how it is done exactly

 

[cleitao]

dear all
i just want to know that how can i control the different appliances using a single switch with the help of interrupt. let if i press the switch one time then it should make on a light, second time then fan, third time than ac & so on upto minimum 12 appliances

It would help if u could be more specific, eg, r u using microcontrollers or fpgas in the application. It seemed to me that u need to write a piece of code to interface with the hardware. If that is the case a Finite State Machine approach may be useful.

 

[prashanttyagi85]

yes i am using here atmega 16 microcontroller

 

[cleitao]

yes i am using here atmega 16 microcontroller

Ok, than you can easily implement your design writing a Finite State Machine code. If u don't know it you probably must go into a bit of reading. You can find it in any intermediate level Digital Electronics book, also a quick search in the web will help. In my opinion it is worthy as it is a powerful tool.

Cheers,
C.