UNIT pptengineering hsdsudsshgusyyghgI.pptx

The project is designed to operate electrical loads using a TV remote. The remote transmits coded infrared data which is then received by a sensor interfaced to the control unit. The system operates electrical loads depending on the data transmitted from the TV remote. Operating conventional wall switches is difficult for elderly or physically handicapped people. This proposed system solves the problem by integrating house hold appliances to a control unit that can be operated by a TV remote.
RC5 based coded data sent from the TV remote is received by an IR receiver interfaced to the microcontroller of 8051 family. The program on the microcontroller refers to the RC5 code to generate respective output based on the input data to operate a set of relays through a relay driver IC. The loads are interfaced to the control unit through the relays. The system can be used in existing domestic area for either operating the loads through conventional switches or with the TV remote.
The project can be enhanced by using radio frequency technology where the operational range shall be independent of line of sight distance as often encountered with IR type of remote control
The project is designed to operate electrical loads using a TV remote. The remote transmits coded infrared data which is then received by a sensor interfaced to the control unit. The system operates electrical loads depending on the data transmitted from the TV remote. Operating conventional wall switches is difficult for elderly or physically handicapped people. This proposed system solves the problem by integrating house hold appliances to a control unit that can be operated by a TV remote.
RC5 based coded data sent from the TV remote is received by an IR receiver interfaced to the microcontroller of 8051 family. The program on the microcontroller refers to the RC5 code to generate respective output based on the input data to operate a set of relays through a relay driver IC. The loads are interfaced to the control unit through the relays. The system can be used in existing domestic area for either operating the loads through conventional switches or with the TV remote.
The project can be enhanced by using radio frequency technology where the operational range shall be independent of line of sight distance as often encountered with IR type of remote control
The project is designed to operate electrical loads using a TV remote. The remote transmits coded infrared data which is then received by a sensor interfaced to the control unit. The system operates electrical loads depending on the data transmitted from the TV remote. Operating conventional wall switches is difficult for elderly or physically handicapped people. This proposed system solves the problem by integrating house hold appliances to a control unit that can be operated by a TV remote.
RC5 based coded data sent from the TV remote is received by an IR receiver interfaced to the microcontroller of 8051 family. The program on the mi

1. UNIT –III OPTICAL RECORDING AND REPRODUCTION

2. OPTICAL RECORDING ON DISC Basics of compact Disc Optical Recording on Disc Digitization of audio signal Playback process Advantages and Disadvantages

3. Basics of Compact Disc As Digital circuit offer complete immunity to noise, efforts were made to record sound in digital form. Different countries were using different video systems Philips and Sony started working on a development project to record digitized sound These efforts resulted into birth of ‘Compact Disc’ system.

4. Optical Recording on Disc Analog signal is translated in digital form Laser Beam is modulated by digitized audio signal Contain record of Digital audio signal in form of pits of 1µm depth and 0.5µm width. Separation between adjacent track (pitch) is 1.6 µm

5. Digitization of A udio signal The audio signal is sampled at 44.1KHz Quantum level pertain is 16 bits Data rate is 44.1k x 16 = 705.6kbps For 1s Laser is ON and for 0s Laser is OFF

6. Advantages of Compact Disc It is not affected by dust, grease and scratches. SNR is Very High ,about 90 dB Wow and Flutter does not exist Distortion is low Frequency response is excellent over audio frequencies (20Hz to 20 KHz Compact in Size

7. Disadvantages Cost is High Recording Can not be erased

8. VIDEO DISC MASTERING AND REPLICATION

9. VIDEO DISC FORMAT Laser Optical System Capacitance System

10. LASER VISION

11.   SELECTAVISION (RCA)

12. video signal pick up in VHD system uses a cantilever arm

13. JVC SYSTEM

14. RECORDING SYSTEM

15. SIGNAL PROCESS ENCODING

16. SPECTRUM OF VIDEO AND AUDIO SIGNALS

17. PLAY BACK SYSTEM

18. THANK YOU