Submitted by
G. ARJUNA RAO
M.TRINADH
P.P. PAVAN KUMAR
B.JASWANTH

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INTRODUCTION
An Embedded System is a microprocessor based system that is embedded as a subsystem, in a larger system (which may or may not be a computer system).
• An embedded system is an applied computer system
• "embedded system", it constantly evolves with advances in technology and dramatic decreases in the cost of implementing various hardware and software components.
• In recent years, the field has outgrown many of its traditional descriptions.
• This holds true for a significant subset of the embedded systems family of computer systems.
• this definition is only partially true today as boards and software typically found in PCs of past and present have been repackaged into more complex embedded system designs.
• Most embedded devices are primarily designed for one specific function.
• devices such as personal data assistant (PDA)/cell phone hybrids, which are embedded systems designed to be able to do a variety of primary functions.
ABSTRACT
This project deals with “Development of an embedded system for industrial applications control”like fan,motors,light etc. using micro controller AT89C52 and Light sensor named as light dependent resistor (LDR).
In our daily life we are observing lights still on in day time also. In this type of conditions are more effected the electricity board.
This project deals the how to avoid this condition using embedded.
The project presented here controlling any motors,fans,lights etc in industries.
For instance Here we are mainly using the sensor for detect the light LDR (light dependent Resistor). The characteristics of the LDR are the resistance is very high when it is in dark and resistance is low when it is in light.
The Microcontroller was used to control the whole system, it monitors the sensor out put and according to the sensor condition the lights operated. The whole program written in embedded c and burned into the microcontroller ROM.
The AT89C52 is an 8-bit microcontroller with 8k bytes of flash ROM, 256 bytes of RAM and is preferred in using this micro due to its quick programming and ease of use.
CIRCUIT DIAGRAM
IR SECTION
IR
Beta Pictoris as seen in infrared.
Infrared imaging is used extensively for military and civilian purposes. Military applications include target acquisition, surveillance, night vision, homing and tracking. Non-military uses include thermal efficiency analysis, remote temperature sensing, short-ranged wireless communication, spectroscopy, and weather forecasting. Infrared astronomy uses sensor-equipped telescopes to penetrate dusty regions of space, such as molecular clouds; detect objects such as planets, and to view highly red-shifted objects from the early days of the universe. Humans at normal body temperature radiate chiefly at wavelengths around 12μm (micrometers), as shown by Wien's displacement law.
At the atomic level, infrared energy elicits vibrational modes in a molecule through a change in the dipole moment, making it a useful frequency range for study of these energy states for molecules of the proper symmetry. Infrared spectroscopy examines absorption and transmission of photons in the infrared energy range, based on their frequency and intensity
Origins of the term
The name means below red, the Latin infra meaning "below". Red is the color of the longest wavelengths of visible light. Infrared light has a longer wavelength (and so a lower frequency) than that of red light visible to humans, hence the literal meaning of below red.
Different regions in the infrared
Objects generally emit infrared radiation across a spectrum of wavelengths, but sometimes only a limited region of the spectrum is of interest because sensors usually collect radiation only within a specific bandwidth. Therefore, the infrared band is often subdivided into smaller sections.
CIE division scheme
The International Commission on Illumination (CIE) recommended the division of infrared radiation into the following three bands: IR-A: 700 nm–1400 nm (0.7 µm – 1.4 µm)
• IR-B: 1400 nm–3000 nm (1.4 µm – 3 µm)
• IR-C: 3000 nm–1 mm (3 µm – 1000 µm)
A commonly used sub-division scheme isNear-infrared (NIR, IR-A DIN): 0.75-1.4 µm in wavelength, defined by the water absorption, and commonly used in fiber optic telecommunication because of low attenuation losses in the SiO2 glass (silica) medium. Image intensifiers are sensitive to this area of the spectrum. Examples include night vision devices such as night vision goggles.
• Short-wavelength infrared (SWIR, IR-B DIN): 1.4-3 µm, water absorption increases significantly at 1,450 nm. The 1,530 to 1,560 nm range is the dominant spectral region for long-distance telecommunications.
• Mid-wavelength infrared (MWIR, IR-C DIN) also called intermediate infrared (IIR): 3-8 µm. In guided missile technology the 3-5 µm portion of this band is the atmospheric window in which the homing heads of passive IR 'heat seeking' missiles are designed to work, homing on to the Infrared signature of the target aircraft, typically the jet engine exhaust plume.
• Long-wavelength infrared (LWIR, IR-C DIN): 8–15 µm. This is the "thermal imaging" region, in which sensors can obtain a completely passive picture of the outside world based on thermal emissions only and requiring no external light or thermal source such as the sun, moon or infrared illuminator. Forward-looking infrared (FLIR) systems use this area of the spectrum. Sometimes also called the "far infrared."
• Far infrared (FIR): 15 - 1,000 µm (see also far infrared laser).
NIR and SWIR is sometimes called "reflected infrared" while MWIR and LWIR is sometimes referred to as "thermal infrared." Due to the nature of the blackbody radiation curves, typical 'hot' objects, such as exhaust pipes, often appear brighter in the MW compared to the same object viewed in the LW.