1. 1. Control of Household Appliances using RF Remote Control Department of Electronics and Communication Engineering
2. 2. Introduction Controlling of household electrical appliances like fan, television, air conditioner or sound systems manually is sometimes hectic because one has to move to the switch board to either turn off or on the device. Disable person who cannot walk also find it difficult to control the devices . Therefore in order to overcome this problem a RF Based Remote Control system is proposed and implemented in this project. One advantage of RF over IR based Remote Control System is that it can operate without any Line of Sight around the house within its range.
3. 3. Objective To built a wireless Remote control to control Appliances To minimize human effort to control the device. To handle multiple task using a single remote.
4. 4. CIRCUIT DIAGRAM
5. 5. How it works The transmitter and receiver is connected according to the circuit diagram. To built the circuit 434 Mhz transmitter and receiver pair, encoder and decoder IC pair (HT12E/HT12D) is used. The transmitter has four input channel and receiver has also four output channel. According to the input fed at the transmitter the output will be reflected at the receiver. The input pattern can be either Logic 0 or 1. These Bits pattern are used to control the devices to either turn on or turn off.
6. 6. Application Table fan Garden light Television Air Conditioner Electric bulbs
7. 7. List of Components RF transmitter and Receiver pair (434 Mhz) Encoder and Decoder pair (HT12E/HT12D) Resistor (33K and 1M Ohm) Four push button switches Two LEDs and two bulbs Two transistor (BC547) Two 5V Electronic Relay 15cm Antenna wire Cathode Ray Oscilloscope (CRO)
8. 8. Electrical parameters of the Circuit Voltage:- 5 to 9 Volt Circuit current:- 13.6 mA Power dissipation:- 122.4mW Input Bits:- 2V for Logic 1 and 0V for logic 0 Output Bits:- 2V for Logic 1 and 0V for logic 0
9. 9. Demonstrating video
10. 10. Conclusion Controlling of Household Appliances using RF Remote control is an effort carried by us to make human life more comfortable and easier. The device is made using RF module of 434 MHz and Encoder and Decoder pair (HT12E/HT12D). In this prototype we use two LEDs and two Bulbs as output devices which are controlled by the four switches present in the transmitter. Any kind of electrical devices can be used in place of these LEDs and Bulbs like we use here. It can be television, air conditioner, fan etc. It can control the devices within 100m range.
11. 11. Thank You Presented by:- Bhaskar Deka Raja Janmoni Medhi Sujita Borah Tridib Sharma