1. RF Based Wireless Voice Controlled
Household device activation and control
system
This project is designed to control the home appliances
through voice (on/off) control as dictated by the person “Switch on
Fan”, Switch Off Light” etc. The Voice Recognition involves
HM2007 IC which is dedicated to process the voice inputs. The
voice inputs is processed by HM2007 IC and the outputs are given
through Wireless using an Encoder.
Another unit is used to decode the wireless inputs and send it
to the appropriate devices for controlling.
Master Controller:
A pic Micro controller will act as a master controller for the
switching of devices.
Voice Controller:
A voice said in front of the mic is converted to text by the
Voice Recognition IC HM2007 and is fed as a input to the
controller, so the controller reacts to it.
MAASTECH,89. Rangarajapuram main road,(Near SBI Bank)
Kodambakkam,Chennai-600024, http://www.maastechindia.com

2. Software Driver in Hitech C
This is a software tool used to control the angular position
i.e., to send specified pulses with controlled timing to vary the
speed as when and where required.
MAASTECH,89. Rangarajapuram main road,(Near SBI Bank)
Kodambakkam,Chennai-600024, http://www.maastechindia.com

3. Block Diagram
MAASTECH,89. Rangarajapuram main road,(Near SBI Bank)
Kodambakkam,Chennai-600024, http://www.maastechindia.com

4. Transmitter Side:
RF Transmitter
(315MHZ)
Encoder HT12E
Microcontroller PIC16F877
+12V Power Supply
+5V Power Supply
HM2007 Board with Keypad
Receiver Side:
RF Receiver (315MHZ)
MAASTECH,89. Rangarajapuram main road,(Near SBI Bank)
Kodambakkam,Chennai-600024, http://www.maastechindia.com
+12V Power Supply

5. Encoder HT12D
Microcontroller PIC16F877
+5V Power Supply
Relay Driver
Relay1
Relay2
Light
Fan
Relay1
Relay2
TV
AC
MAASTECH,89. Rangarajapuram main road,(Near SBI Bank)
Kodambakkam,Chennai-600024, http://www.maastechindia.com

6. Encoder HT12D
Microcontroller PIC16F877
+5V Power Supply
Relay Driver
Relay1
Relay2
Light
Fan
Relay1
Relay2
TV
AC
MAASTECH,89. Rangarajapuram main road,(Near SBI Bank)
Kodambakkam,Chennai-600024, http://www.maastechindia.com