imf(international monestry fund)

Cellphone-Based Remote Controller For Water Pump

PROJECT REPORT ON Cellphone-Based Remote Controller For Water Pump B.E.(Electronics & Telecommunication engineering) BY VISHAL A. SABLE MAHESH G. RAUT Under guidance of PROF. D.B. BHOYAR

Department Electronics & Telecommunication engineering
YESHWANTRAO CHAVAN COLLEGE OF ENGINEERING
(an Autonomous institute affiliated to Rashtrasant Tukadoji Maharaj Nagpur University) Wanadongri,hingna road,nagpur(Maharastra)-441110 2013-14 CERTIFICATE This is certify that Vishal sable(178) and Mahesh Raut(149) student of 5th semester B.E.,ET branch,section B have successfully completed project on “CELLPHONE-BASED REMOTE CONTROLLER FOR WATER PUMP” of the subject workshop under the guidance of D.B. BHOYAR.

Prof. D.B. BHOYAR. DR. P.L. ZADE
Assistant prof.,dept. of HOD,dept. of Electronics & Electronics & telecommunication,YCCE Telecommunication,YCCE INDEX
Sr. no TOPIC 1
Introduction
2
Block Digram 3
Circuital Design 4
Construction
5
Working Principle 6
PCB Layout 7
Result

8
Conclusion
9
Future Scope 10
References

INTRODUCTION :-

Inconvenience in switching on a water pump installed in a remote farm is a common problem faced by farmers.
Many circuits have been developed to solve this problem.
Most of them are expensive and microcontroller-based. Here we present a cellphone-based remote controller for water pump.
By calling the cellphone attached to the controller, the water pump can be directly activated. The aim of the proposed system is to develop a cost effective solution that will provide controlling of water pump remotely and enable security against intrusion in the absence of owner. The system provides availability due to development of a low cost system. The water pump control system with an affordable cost was thought to be built that should be mobile providing remote access to the pump and allowing reliability. This system is designed for controlling arbitrary devices, it includes a cell phone which is connect to the system via head set. To active the cellular phone unit on the system a call is to be made and as the call is answered, in response the user would enter a three/four digit password to access the system to control devices. As the caller press the specific password, it results in turning ON or OFF specific device. The device switching is achieved by Relay. Block Digram:-

The water pump controller is connected to a dedicated cellphone through connector J1 with auto-answering mode enabled. The DTMF signal sent from the user end is decoded by the DTMF decoder and the corresponding binary-coded decimal (BCD) value appears on outputsQ0 through Q3. In this circuit only three of them are used.
Working of the circuit is simple. To switch ‘on’ the water pump, call the cellphone connected to the controller circuit and press ‘7’ once the ring stops. LED1 will glow to indicate that the water pump is switched on. The water pump turns off automatically after the preset time. LED1 turns off simultaneously.

Circuital Design:-

The circuit is built around DTMF decoder IC MT8870 (IC1), timer NE555(IC2) wired as monostable multivibrator and a few discrete components. The main component of the circuit is IC MT8870. This DTMF decoder has band-split filter and digital decoder functions. It offers the advantages of small size, low power consumption and high performance.

Construction:-

The circuit is built around DTMF decoder IC MT8870 (IC1), timer NE555

DTMF decoder IC MT8870:- One common DTMF receiver IC is the Motorola
MT8870 that is widely used in electronic communications circuits. The MT8870 is an 18-pin IC. It is used in telephones and a variety of other applications. When a proper output is not obtained in projects using this IC, engineers or technicians need to test this IC separately. A quick testing of this IC could save a lot of time in research labs and manufacturing industries of communication instruments. Here’s a small and handy tester circuit for the DTMF IC. It can be assembled on a multipurpose
PCB with an 18-pin IC base. One can also test the IC on a simple breadboard.

Timer NE555:- The LM555/NE555/SA555 is a highly stable controller capable of producing accurate timing pulses. With mono- stable operation, the time delay is controlled by one external resistor and one capacitor.With astable operation the frequency and duty cycle are accurately controlled with two external resistors and one capacitor.

Working Principle:-

This DTMF decoder has band-split filter and digital decoder functions. It offers the advantages of small size, low power consumption and high performance.

Once monostable timer IC2 is triggered, its output goes high for the preset time period. The time period depends on the values of resistor R7 and capacitor C4. It can be adjusted between 8 and 50 minutes using pot-meter VR1. The high output at pin 3 of IC2 energises relay RL1 to switch on the water pump.

The triggering pulse for IC2 is generated by DTMF decoder IC1 and the arrangement of diodes D1 through D5. Std pin of IC1 provides a high pulse when a valid tone-pair is received. Transistor T1 conducts only when outputs Q0 through Q2 and Std are high simultaneously. This can be achieved by sending digit ‘7’ through DTMF. Use relay RL1 with contact current rating capable of carrying the water pump’s current. To test the circuit for proper functioning, press switch S1 and verify 5V at TP1 with respect to TP0. Connect the cellphone to the controller using connector J1. Call this cellphone and press ‘7’ once the ring stops. At the same time , verify high-to-low triggering pulse at TP2.TP3 now should be high for the preset time period.

PCB Layout:-

An actual-size, single-side PCB for cell-phone-based remote controller is shown in above fig. and according to its component layout in Suitable connector implement on the PCB to connect the cellphone.

Assemble the circuit on a PCB to minimise time and assembly errors. Carefully assemble the components and double-check for any overlooked error. Use suitable IC socket for MT887 and NE555 ICs.

Result:-

In cellphone-based remote controller for water pump we are giving ringing pulse as input by calling on receiving cell which results in initiating water pump. Conclusion:- The cellphone-based remote controller for water pump is much better than expensive microcontroller-based remote controller for water pump.
Future Scope:- In switching on a water pump installed in a remote farm is a common problem faced by farmers therefore such product may be in demand in upcoming years. It can creat good market demand, as it operates on the cell phone so we can operate it from any where, there is no restriction of distance which may occurs in remote controlling system.

References:-
DTMF decoding, Available:- http://www.dattalo.com/technical/theory/dtmf.html Timer IC-555 Available:- www.fairchildsemi.com Relay Information, Available: http://en.wikipedia.org/wiki/Relay

References: - DTMF decoding, Available:- http://www.dattalo.com/technical/theory/dtmf.html Timer IC-555 Available:- www.fairchildsemi.com Relay Information, Available: http://en.wikipedia.org/wiki/Relay