The aim of this project is to provide an efficient solution for automatic control of irrigation motor through mobile phone using DTMF technology.   Now a day’s technology is running with time, it completely occupied the life style of human beings. Even though there is such an importance for technology in our routine life there are even people whose life styles are very far to this well known term technology. So it is our responsibility to design few reliable systems which can be even efficiently used by them. This basic idea gave birth to the project DTMF controlled irrigation motor. Here the automation process is done through the microcontroller based technology.     The main controlling device of the whole system is a Microcontroller. DTMF decoder, relay switch are interfaced to the microcontroller. User needs to make a call to the dedicated mobile phone at the system and it will be answered automatically. User need to input the numbers dedicated for ON/OFF the irrigation water pump. The DTMF decoder receives the pressed number information and feds this information to microcontroller. Microcontroller decides whether to ON/OFF the water pump through relay switch, depending on information from DTMF decoder. To perform this intelligent task, Microcontroller is loaded with an intelligent program written using embedded ‘C’ language.  

The main objectives of the project are:  

1. Controlling high voltage water pump through mobile phone.
2. Controlling from anywhere in the world.

  Applications:  

1. Utilized for irrigation purpose.
2. Very useful for illiterates operation.
3. Can be operated from any place in the world.
4. User friendly.

  This project provides exposure to the following technologies:  

1. DTMF technology.
2. Embedded ‘C’ programming concepts
3. DTMF decoder interfacing to microcontroller.
4. Design of PCB.

  The major building blocks of this project are:  

1. Regulated Power Supply.
2. Microcontroller.
3. DTMF decoder.
4. Relay with driver (Interfacing circuit).
5. Crystal
6. reset
7. LED indicators.

              Software’s used:    

1. PIC-C compiler for Embedded C programming.
2. PIC kit 2 programmer for dumping code into Micro controller.
3. Express SCH for Circuit design.
4. Proteus for hardware simulation.

  Regulated Power Supply:

                                   

Block diagram:

video: