Check out this wonderful project that you can use to automate your home using voice commands without spending big bucks. To build this, you will only require few popularly used components like:
- a VRbot voice recognition module
- an AVR ATtiny2313
- a 433MHz RF send module
- low-cost wireless light swiches (or relays)
 VRBot speech recognition module is basically the core of this project. It recognizes 32 custom voice commands.  Once a command is recognized, a wireless switch is activated via a radio receiver.
Via: Hacknmod
Watch out this video to learn more:
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