ABSTRACT
In this project we
are going to develop an embedded system, which will control all the industrial 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
system uses a compact circuitry built around 8051 microcontroller Programs are
developed in Embedded C. Flash magic is used for loading programs into
Microcontroller.
SOFTWARE: Embedded ‘C’
TOOLS: Small Device Cross Compiler & Keil uvision3.
TARGET DEVICE: 8051 Microcontroller
APPLICATIONS: Remote controlling.
ADVANTAGES: Low cost, automated operation, Low Power consumption.
REFERENCE: The 8051 micro controller and embedded systems by