Home Automation Using TV Remote Controller (IR-Infrared Remote Control) HD

Embedded systems are finding increasing application not only in Domestic applications but also in areas of industrial automation, automobiles, power electronics, and defense and space equipments. Micro controllers from the basic building blocks for many embedded systems.Home automation is controlling of light, climate, doors and window shutters and multimedia entertainment systems. In this project we are going to develop an embedded system, which will control all these devices with commands from a Remote device through IR. The IR light is invisible light about 950 nm wavelength. One biggest problem in using IR light is that there many other sources of it like sun, light bulbs, fire. In order to exclude other sources, IR signal is modulated by some frequency. Receiver has to be tuned for this frequency. Mostly remote controls transmit IR signal using 36 kHz frequency signals. Transmitting and coding is one part which can be done more easily than receiving and decoding. Decoding is usually performed by using microcontrollers. First of all receivers has to get rid of 36 kHz carrier frequency. This is not simple task to demodulate signal, this is why special IR receiver IC’s are produced. This receiver simply removes 36 KHz carrier signal and gives clean pulses that are used for device control. The project deals with the development of infrared remote controller of home appliances using Atmel AT89S52 micro controller, which is used to regulate the power flowing in the a.c. load using a remote controller sending signals to the micro controller Atmel AT89S52 as interrupts. The device is manufactured using Atmel’s high -density non-volatile memory technology and is compatible with the industry standards MCS-51 instruction set. By combining a versatile 8-bit CPU with flash on a monolithic chip, the Atmel AT89S52 is a powerful micro controller which provides a highly flexible and cost effective solution to many embedded control applications. Other 6-channels are used for ON / OFF type control or for switching devices. The revolution of home networking is an emerging technology in this digital era. Like many other a.c drives gets to be automated with the embedded controllers for most of the devices for safety at residential areas or in industries. The project is an attempt to implementation of few consumer electronic products mostly at homes. The system uses a compact circuitry built around 8051 microcontroller Programs are developed in Embedded C. Flash magic is used for loading programs into Microcontroller.