project maker
08-08-2014, 10:54 AM
“ REMOTE CONTROL BASED HOME APPLIANCES
[attachment=66732]
ABSTRACT
The main aim of conducting this project is to control a maximum of eight electrical
appliances by just using a TV remote. Normal IR circuits can switch only one device.Butusing this circuit, different devices can be controlled using same remote with differentswitches. In this circuit, we interfaced 8 devices. These devices are switched using remotekeypad -1 to 8. AT89C2051 microcontroller is used to control the inputs and outputs.
TSOP1738 (infrared receiver) is used to receive the infrared signals from TV Remote. ULN2803(High voltage, high current) buffer is used to drive relays. A working system will ultimatelybe demonstrated to validate the design.
INTRODUCTION
Remote control for home appliances is an absolute necessity in our fast-paced life. As a result, much important has been given to this aspect and a range of remote controls are prevalent today. One of the most common is that which makes use of IR radiations at particular frequencies.
Our product is a Remote Operated Home Appliance or Remote controlled Home appliance. The circuit is connected to any of the home appliances (lamp, fan, radio, etc) to make the appliance turn on/off from a TV, VCD, VCR, Air Conditioner or DVD remote control. The circuit can be activated from up to 10 meters. It is very easy to build and can be assembled on a general-purpose PCB.
The circuit essentially consists of a transmitter consisting of a 555 IC, the receiver consisting of an IR module, CD4017 IC, LED’s to indicate the reception of the IR radiations, otherwise indicating the ON/OFF state, relay and other components
CIRCUIT DESCRIPTION
The product consists of a remote which is the transmitter of the IR radiations and the receiver which responds to the radiations and switches ON and OFF the appliance.
TRANSMITTER
The transmitter is basically an astablemultivibrator using 555 timer IC which provides a 38 kHz frequency at its output. The circuit here uses 555 timer IC to avoid fast switching. (This can also achieved by using a high value capacitor across TSOP sensor.) You can only switch the circuit after 3 seconds. The design for the circuit is as given below.
TESTING
After soldering the components on to the PCB, the boards are thoroughly cleaned for removing any residual flux and wire leads. All the components are checked for their values and proper orientation if applicable. Before ICs are inserted into the sockets, power is applied to the board and voltages are measured at the IC power points. Other DC voltages are also checked if possible. Then power is removed from the board, and ICs are inserted into the sockets, checking the proper orientation. Power is again applied to the board expected voltages and signals are monitored.
The supply voltages are monitored and verified. Working is tested by aiming the IR beam from the transmitter to the IR module of the receiver and observing the lighting of the LEDs in the receiver.
CONCLUSION
The product to demonstrate the remote controlled operation of home appliances has been successfully implemented and favorable results have been obtained. This is a commercially viable product and its application is widespread these days with almost all home appliances. Since IR radiations are made use of here, each task can be designed to be performed at different frequencies, each specific to a particular task. As a result of which several operations can be performed on a single appliance, as in the case of television. The product finds great scope futuristically, as part of an environment where man restricts his motion and performs his day-to-day activities on a remote controlled basis.
[attachment=66732]
ABSTRACT
The main aim of conducting this project is to control a maximum of eight electrical
appliances by just using a TV remote. Normal IR circuits can switch only one device.Butusing this circuit, different devices can be controlled using same remote with differentswitches. In this circuit, we interfaced 8 devices. These devices are switched using remotekeypad -1 to 8. AT89C2051 microcontroller is used to control the inputs and outputs.
TSOP1738 (infrared receiver) is used to receive the infrared signals from TV Remote. ULN2803(High voltage, high current) buffer is used to drive relays. A working system will ultimatelybe demonstrated to validate the design.
INTRODUCTION
Remote control for home appliances is an absolute necessity in our fast-paced life. As a result, much important has been given to this aspect and a range of remote controls are prevalent today. One of the most common is that which makes use of IR radiations at particular frequencies.
Our product is a Remote Operated Home Appliance or Remote controlled Home appliance. The circuit is connected to any of the home appliances (lamp, fan, radio, etc) to make the appliance turn on/off from a TV, VCD, VCR, Air Conditioner or DVD remote control. The circuit can be activated from up to 10 meters. It is very easy to build and can be assembled on a general-purpose PCB.
The circuit essentially consists of a transmitter consisting of a 555 IC, the receiver consisting of an IR module, CD4017 IC, LED’s to indicate the reception of the IR radiations, otherwise indicating the ON/OFF state, relay and other components
CIRCUIT DESCRIPTION
The product consists of a remote which is the transmitter of the IR radiations and the receiver which responds to the radiations and switches ON and OFF the appliance.
TRANSMITTER
The transmitter is basically an astablemultivibrator using 555 timer IC which provides a 38 kHz frequency at its output. The circuit here uses 555 timer IC to avoid fast switching. (This can also achieved by using a high value capacitor across TSOP sensor.) You can only switch the circuit after 3 seconds. The design for the circuit is as given below.
TESTING
After soldering the components on to the PCB, the boards are thoroughly cleaned for removing any residual flux and wire leads. All the components are checked for their values and proper orientation if applicable. Before ICs are inserted into the sockets, power is applied to the board and voltages are measured at the IC power points. Other DC voltages are also checked if possible. Then power is removed from the board, and ICs are inserted into the sockets, checking the proper orientation. Power is again applied to the board expected voltages and signals are monitored.
The supply voltages are monitored and verified. Working is tested by aiming the IR beam from the transmitter to the IR module of the receiver and observing the lighting of the LEDs in the receiver.
CONCLUSION
The product to demonstrate the remote controlled operation of home appliances has been successfully implemented and favorable results have been obtained. This is a commercially viable product and its application is widespread these days with almost all home appliances. Since IR radiations are made use of here, each task can be designed to be performed at different frequencies, each specific to a particular task. As a result of which several operations can be performed on a single appliance, as in the case of television. The product finds great scope futuristically, as part of an environment where man restricts his motion and performs his day-to-day activities on a remote controlled basis.