Our project is a persistence of vision display (POV) that spins 360 degrees horizontally. The purpose of our POV display project is to create a small apparatus that will create a visual using only a small number of LEDs as it spins in a circle. When the LEDs rotate several times around a point in less than a second, the human eye reaches its limit of motion perception and creates an illusion of a continuous image. Therefore, our POV display demonstrates this phenomenon by creating a visual as the LEDs spin rapidly in a circle and the person watching will see one continuous image.
ATmega32 Controlled “Persistence of Vision” DisplayUday Wankar
This paper explains the project which includes design and fabrication of a display based on Persistence of
vision. The objective of the project is to create virtual display in air. A class of display device described as
"POV" is one that composes an image by displaying one spatial portion at a time in rapid succession (for
example, one column of pixels every few milliseconds). A two-dimensional POV display is often accomplished
by means of rapidly moving a single row of LEDs along a linear or circular path. The effect is that the image is
perceived as a whole by the viewer as long as the entire path is completed during the visual persistence time of
the human eye. A further effect is often to give the illusion of the image floating in mid-air. For building this
project, requirement is just a small 40 pin microcontroller, a position encoder, and SMD LEDs.
ATmega32 Controlled “Persistence of Vision” DisplayUday Wankar
This paper explains the project which includes design and fabrication of a display based on Persistence of
vision. The objective of the project is to create virtual display in air. A class of display device described as
"POV" is one that composes an image by displaying one spatial portion at a time in rapid succession (for
example, one column of pixels every few milliseconds). A two-dimensional POV display is often accomplished
by means of rapidly moving a single row of LEDs along a linear or circular path. The effect is that the image is
perceived as a whole by the viewer as long as the entire path is completed during the visual persistence time of
the human eye. A further effect is often to give the illusion of the image floating in mid-air. For building this
project, requirement is just a small 40 pin microcontroller, a position encoder, and SMD LEDs.
A robot is usually an electro-mechanical machine that is guided by computer and electronic programming. Many robots have been built for manufacturing purpose and can be found in factories around the world. Designing of the latest inverted ROBOT which can be controlling using an APP for android mobile. We are developing the remote buttons in the android app by which we can control the robot motion with them. A smart phone Android operated robot car. Now here is a simple to control our robo car using Bluetooth module HC-05 and AT89S52 microcontroller with our android Smartphone device. The controlling devices of the whole system are a microcontroller. Bluetooth module, DC motors are interfaced to the microcontroller. . The robot in the project can be made to move in all the four directions using the android phone. In achieving the task the controller is loaded with program written using Embedded ‘C’ Languages. Android smart phone controller Bluetooth robot using microcontroller. In our work, move the robot upward, backward, left and right side by the android application such as Bluetooth Controlled Car.
Infrared IR Sensor Circuit Diagram and Working Principleelprocus
An infrared sensor is an electronic device, that emits in order to sense some aspects of the surroundings. An IR sensor can measure the heat of an object as well as detects the motion. These types of sensors measures only infrared radiation, rather than emitting it that is called as a passive IR sensor. Usually in the infrared spectrum, all the objects radiate some form of thermal radiations.
Heart beat monitor using AT89S52 microcontrollerSushil Mishra
We , in this project are measuring the heart beat using the pulse oximetry logic.
The timer we have set for counting the heart beat is 30s.
There is a set point we can decide, after 30 s the heartbeat would be shown on the LCD along with a buzzer sound (if it exceeds the set point).
Power Quality is a combination of Voltage profile, Frequency profile, Harmonics contain and reliability of power supply.
The Power Quality is defined as the degree to which the power supply approaches the ideal case of stable, uninterrupted, zero distortion and disturbance free supply.
Injection of the wind power into an electric grid affects the power quality. The performance of the wind turbine and thereby power quality are determined on the basis of measurements and the norms followed according to the guideline specified in International Electro-technical Commission standard, IEC-61400. The influence of the wind turbine in the grid system concerning the power quality measurements are-the active power, reactive power, variation of voltage, flicker, harmonics, and electrical behavior of switching operation and these are measured according to national/international guidelines. The paper study demonstrates the power quality problem due to installation of wind turbine with the grid. In this proposed scheme STATic COMpensator (STATCOM) is connected at a point of common coupling with a battery energy storage system (BESS) to mitigate the power quality issues. The battery energy storage is integrated to sustain the real power source under fluctuating wind power. The STATCOM control scheme for the grid connected wind energy generation system for power quality improvement is simulated using MATLAB/SIMULINK in power system block set. The effectiveness of the proposed scheme relives the main supply source from the reactive power demand of the load and the induction generator. The development of the grid co-ordination rule and the scheme for improvement in power quality norms as per IEC-standard on the grid has been presented.
A robot is usually an electro-mechanical machine that is guided by computer and electronic programming. Many robots have been built for manufacturing purpose and can be found in factories around the world. Designing of the latest inverted ROBOT which can be controlling using an APP for android mobile. We are developing the remote buttons in the android app by which we can control the robot motion with them. A smart phone Android operated robot car. Now here is a simple to control our robo car using Bluetooth module HC-05 and AT89S52 microcontroller with our android Smartphone device. The controlling devices of the whole system are a microcontroller. Bluetooth module, DC motors are interfaced to the microcontroller. . The robot in the project can be made to move in all the four directions using the android phone. In achieving the task the controller is loaded with program written using Embedded ‘C’ Languages. Android smart phone controller Bluetooth robot using microcontroller. In our work, move the robot upward, backward, left and right side by the android application such as Bluetooth Controlled Car.
Infrared IR Sensor Circuit Diagram and Working Principleelprocus
An infrared sensor is an electronic device, that emits in order to sense some aspects of the surroundings. An IR sensor can measure the heat of an object as well as detects the motion. These types of sensors measures only infrared radiation, rather than emitting it that is called as a passive IR sensor. Usually in the infrared spectrum, all the objects radiate some form of thermal radiations.
Heart beat monitor using AT89S52 microcontrollerSushil Mishra
We , in this project are measuring the heart beat using the pulse oximetry logic.
The timer we have set for counting the heart beat is 30s.
There is a set point we can decide, after 30 s the heartbeat would be shown on the LCD along with a buzzer sound (if it exceeds the set point).
Power Quality is a combination of Voltage profile, Frequency profile, Harmonics contain and reliability of power supply.
The Power Quality is defined as the degree to which the power supply approaches the ideal case of stable, uninterrupted, zero distortion and disturbance free supply.
Injection of the wind power into an electric grid affects the power quality. The performance of the wind turbine and thereby power quality are determined on the basis of measurements and the norms followed according to the guideline specified in International Electro-technical Commission standard, IEC-61400. The influence of the wind turbine in the grid system concerning the power quality measurements are-the active power, reactive power, variation of voltage, flicker, harmonics, and electrical behavior of switching operation and these are measured according to national/international guidelines. The paper study demonstrates the power quality problem due to installation of wind turbine with the grid. In this proposed scheme STATic COMpensator (STATCOM) is connected at a point of common coupling with a battery energy storage system (BESS) to mitigate the power quality issues. The battery energy storage is integrated to sustain the real power source under fluctuating wind power. The STATCOM control scheme for the grid connected wind energy generation system for power quality improvement is simulated using MATLAB/SIMULINK in power system block set. The effectiveness of the proposed scheme relives the main supply source from the reactive power demand of the load and the induction generator. The development of the grid co-ordination rule and the scheme for improvement in power quality norms as per IEC-standard on the grid has been presented.
This paper explains the project which is a special kind of circular LED display. With the
help some mechanical assembly, LED count, hardware requirement, and hence overall cost is
cut to very affordable price. Also, maintenance and repairing of the display is so easy, that
anyone having a little electronics knowledge can take care of this. All the synchronizing can be
implemented through software. First of its kind, made using the 20-pin 8051 series
microcontroller, this project use the principle of Space Multiplexing. This propeller display is
mechanically scanned and displays the characters in digital format. Made from scrap it can be
used anywhere and everywhere and the most amazing fact about this display is its crystal clear
display. This display consists of just 7 bright LEDs which are rotated to show the display. For
building this project, requirement is just a small 20 pin microcontroller, a position encoder, and
LEDs. This display can show the messages, which will require a whopping 525 LEDs. So
hardware and cost minimization is achieved.
Summer training project report on embedded system at BSNL ALTTC Ghaziabad. Submitted by RAM AVTAR (ECE Department of IMSEC) of 2016 Batch. Submitted in IMS Engineering College, Gaziabad
Ketan Kothari
This project is a special kind of circular LED display. With the help some mechanical assembly, LED count, hardware requirement, and hence overall cost is cut to very affordable price. Also, maintenance and repairing of the display is so easy, that anyone having a little electronics knowledge, can take care of this. All the synchronizing can be implemented through software.
First of its kind, made using the 20 pin dip AT mega 16 series microcontroller, this project use the principle of Space Multiplexing. This propeller display is mechanically scanned and displays the characters in digital format. Made from scrap it can be used anywhere and everywhere and the most amazing fact about this display is its crystal clear display. This display consists of just 8 bright LEDs which are rotated to show the display.
Este comic, editable por otra parte es un documento imprescindible para todos los arduinomaniacos y sobretodo para quienes nos dedicamos a divulgar a todo tipo de públicos. Su autor JODY CULKIN, de la que me declaro mega fan desde ya.
Adding Remote Controller Functionality To Any StereoEditor IJCATR
Use of stereo has become common in our lives. They are used in cars, TVs, music players etc. And it is essential at least to control their volumes. Suppose there is a stereo amplifier which functions pretty well but it does not have a remote. It would be very annoying if its volume cannot be controlled. So this project is useful as it creates a device which makes use of any existing remote to control the volume. For controlling the volume, we use a volume controller IC. The electronic volume controller IC PT2258 is a digital potentiometer which can be controlled using I2C protocols. It is used to control the attenuation for every combination possible from 0 to -79 dB/step. Universal IR receiver is used to decode the IR codes and the data will be transferred to the Arduino which in turn communicates with the IC PT2258 and controls the volume. The device also consists of two buttons, which are used to synchronize the IR code of the existing remote with the device. So the user will be able to use the device easily.
TEACHING AND LEARNING BASED OPTIMISATIONUday Wankar
Teaching–Learning-Based Optimization (TLBO) seems to be a rising star from amongst a number of metaheuristics with relatively competitive performances. It is reported that it outperforms some of the well-known metaheuristics regarding constrained benchmark functions, constrained mechanical design, and continuous non-linear numerical optimization problems. Such a breakthrough has steered us towards investigating the secrets of TLBO’s dominance. This report’s findings on TLBO qualitatively and quantitatively through code-reviews and experiments, respectively.
It is a selection of best element (with regard to some criteria) from some set of available alternatives. In the simplest case, an optimization problem consist of maximizing or minimizing a real function by choosing input values from within an allowed set and computing the value of function. The classical optimization techniques are useful in finding the optimum solution or unconstrained maxima or minima of continuous and differentiable functions. These are analytical methods and make use of differential calculus in locating the optimum solution. The classical methods have limited scope in practical applications as some of them involve objective functions which are not continuous and un-differentiable. Yet, the study of these classical techniques of optimization form a basis for developing most of the numerical techniques that have evolved into advanced techniques more suitable to today’s practical problems.
The difficulties associated with using mathematical optimization on large-scale engineering problems have contributed to the development of alternative solutions. Linear programming and dynamic programming techniques, for example, often fail (or reach local optimum) in solving NP-hard problems with large number of variables and non-linear objective functions. To overcome these problems, researchers have proposed evolutionary-based algorithms for searching near-optimum solutions to problems.
Evolutionary algorithms (EAs) are stochastic search methods that mimic the metaphor of natural biological evolution and/or the social behaviour of species. Examples include how ants find the shortest route to a source of food and how birds find their destination during migration. The behaviour of such species is guided by learning, adaptation, and evolution. To mimic the efficient behaviour of these species, various researchers have developed computational systems that seek fast and robust solutions to complex optimization problems. The first evolutionary-based technique introduced in the literature was the genetic algorithms (Gas). GAs were developed based on the Darwinian principle of the ‘survival of the fittest’ and the natural process of evolution through reproduction. Based on its demonstrated ability to reach near-optimum solutions to large problems, the GAs technique has been used in many applicationsin science and engineering. Despite their benefits, GAs may require long processing time for a near optimum solution to evolve. Also, not all problems lend themselves well to a solution with GAs.
For three decades, many mathematical programming methods have been developed to solve optimization problems. However, until now, there has not been a single totally efficient and robust method to coverall optimization problems that arise in the different engineering fields.Most engineering application design problems involve the choice of design variable values that better describe the behaviour of a system.At the same time, those results should cover the requirements and specifications imposed by the norms for that system. This last condition leads to predicting what the entrance parameter values should be whose design results comply with the norms and also present good performance, which describes the inverse problem.Generally, in design problems the variables are discreet from the mathematical point of view. However, most mathematical optimization applications are focused and developed for continuous variables. Presently, there are many research articles about optimization methods; the typical ones are based on calculus,numerical methods, and random methods.
The calculus-based methods have been intensely studied and are subdivided in two main classes: 1) the direct search methods find a local maximum moving a function over the relative local gradient directions and 2) the indirect methods usually find the local ends solving a set of non-linear equations, resultant of equating the gradient from the object function to zero, i.e., by means of multidimensional generalization of the notion of the function’s extreme points from elementary calculus given smooth function without restrictions to find a possible maximum which is to be restricted to those points whose slope is zero in all directions. The real world has many discontinuities and noisy spaces, which is why it is not surprising that the methods depending upon the restrictive requirements of continuity and existence of a derivative, are unsuitable for all, but a very limited problem domain. A number of schemes have been applied in many forms and sizes. The idea is quite direct inside a finite search space or a discrete infinite search space, where the algorithms can locate the object function values in each space point one at a time. The simplicity of this kind of algorithm is very attractive when the numbers of possibilities are very small. Nevertheless, these outlines are often inefficient, since they do not complete the requirements of robustness in big or highly-dimensional spaces, making it quite a hard task to find the optimal values. Given the shortcomings of the calculus-based techniques and the numerical ones the random methods have increased their popularity.
Finding an alternative with the most cost effective or highest achievable performance under the given constraints, by maximizing desired factors and minimizing undesired ones. It also mean that it make best use of a situation or resource. In comparison, maximization means trying to attain the highest or maximum result or outcome without regard to cost or expense. Practice of optimization is restricted by the lack of full information, and the lack of time to evaluate what information is available (see bounded reality for details). In computer simulation (modeling) of business problems, optimization is achieved usually by using linear programming techniques of operations research.
The first ant colony optimization (ACO) called ant system was inspired through studying of the behaviour of ants in 1991 by Macro Dorigo and co-workers. An ant colony is highly organized, in which one interacting with others through pheromone in perfect harmony. Optimization problems can be solved through simulating ant’s behaviours. Since the first ant system algorithm was proposed, there is a lot of development in ACO. In ant colony system algorithm, local pheromone is used for ants to search optimum result. However, high magnitude of computing is its deficiency and sometimes it is inefficient. Thomas Stützle etal. Introduced MAX-MIN Ant System (MMAS) in 2000. It is one of the best algorithms of ACO. It limits total pheromone in every trip or sub-union to avoid local convergence. However, the limitation of pheromone slows down convergence rate in MMAS.
The gas turbine is an internal combustion engine that uses air as the working fluid. The engine extracts chemical energy from fuel and converts it to mechanical energy using the gaseous energy of the working fluid (air) to drive the engine and propeller, which, in turn, propel the aeroplane.
The gas turbine is an internal combustion engine that uses air as the working fluid. The engine extracts chemical energy from fuel and converts it to mechanical energy using the gaseous energy of the working fluid (air) to drive the engine and propeller, which, in turn, propel the airplane.
This ppt show the steps to rewind the Brushless motor(BLDC)
If you fly brushless you've probably cooked a motor or two. You also probably know there are many different types of motors. Similar motors when wound differently performs very differently. Whether you've burned the motor up, or just want to alter performance, rewinding is a cheap solution for a patient modeller.
For this tutorial, I will be using Dynam E-Razor 450 Brushless Motor 60P-DYM-0011 (2750Kv). It is a Delta wound 8T (It means 8 turns ) quad wind.
The winding pattern described in this tutorial (called an ABC wind - ABCABCABC as you go around the stator) works for any brushless motor with 9 stator teeth and 6 magnets.
This ppt show the steps to rewind the Brushless motor(BLDC)
If you fly brushless you've probably cooked a motor or two. You also probably know there are many different types of motors. Similar motors when wound differently performs very differently. Whether you've burned the motor up, or just want to alter performance, rewinding is a cheap solution for a patient modeller.
For this tutorial, I will be using Dynam E-Razor 450 Brushless Motor 60P-DYM-0011 (2750Kv). It is a Delta wound 8T (It means 8 turns ) quad wind.
The winding pattern described in this tutorial (called an ABC wind - ABCABCABC as you go around the stator) works for any brushless motor with 9 stator teeth and 6 magnets.
Arm cortex (lpc 2148) based motor speedUday Wankar
The project is designed to control the speed of a DC and AC motor using an
ARM7 LPC2148 processor. The speed of motor is directly proportional to the voltage
applied across its terminals. Hence, if voltage across motor terminal is varied, then
speed can also be varied. This project uses the above principle to control the speed of
the motor by varying the duty cycle of the pulses applied to it, popularly known as
PWM control. The project uses input button interfaced to the processor, which are
used to control the speed of motor. Pulse Width Modulation is generated at the output
by the microcontroller as per the program. The program is written in Embedded C.
The average voltage given or the average current flowing through the motor
will change depending on the duty cycle, ON and OFF time of the pulses, so the speed
of the motor will change. A motor driver IC is interfaced to the ARM7 LPC2148
processor board for receiving PWM signals and delivering desired output for speed
control. Further the project can be enhanced by using power electronic devices such
as IGBTs to achieve speed control higher capacity industrial motors.
Arm Processor Based Speed Control Of BLDC MotorUday Wankar
The project is designed to control the speed of a DC motor using an ARM series processor. The speed of DC motor is directly proportional to the voltage applied across its terminals. Hence, if voltage across motor terminal is varied, then speed can also be varied. This project uses the above principle to control the speed of the motor by varying the duty cycle of the pulse applied to it (popularly known as PWM control). The project uses input button interfaced to the processor, which are used to control the speed of motor. PWM (Pulse Width Modulation) is generated at the output by the microcontroller as per the program. The program is written in Embedded C. The average voltage given or the average current flowing through the motor will change depending on the duty cycle (ON and OFF time of the pulses), so the speed of the motor will change. A motor driver IC is interfaced to the STM32 board for receiving PWM signals and delivering desired output for speed control of a small DC motor. Further the project can be enhanced by using power electronic devices such as IGBTs to achieve speed control higher capacity industrial motors.
Arm cortex ( lpc 2148 ) based motor speed control Uday Wankar
The project is designed to control the speed of a DC and AC motor using an ARM7 LPC2148 processor. The speed of motor is directly proportional to the voltage applied across its terminals. Hence, if voltage across motor terminal is varied, then speed can also be varied. This project uses the above principle to control the speed of the motor by varying the duty cycle of the pulses applied to it, popularly known as PWM control. The project uses input button interfaced to the processor, which are used to control the speed of motor. Pulse Width Modulation is generated at the output by the microcontroller as per the program. The program is written in Embedded C.
The average voltage given or the average current flowing through the motor will change depending on the duty cycle, ON and OFF time of the pulses, so the speed of the motor will change. A motor driver IC is interfaced to the ARM7 LPC2148 processor board for receiving PWM signals and delivering desired output for speed control. Further the project can be enhanced by using power electronic devices such as IGBTs to achieve speed control higher capacity industrial motors.
MSEB was set up in 1960 to generate, transmit and distribute power to all consumers in
Maharashtra excluding Mumbai. MSEB was the largest SEB in the country. The generation
capacity of MSEB has grown from 760 MW in 1960-61 to 9771 MW in 2001-02. The customer
base has grown from 1,07,833 in 1960-61 to 1,40,09,089 in 2001-02.
C.S.T.P.S in contribution much in field of production of electricity. It is not only number
one thermal power station in Asia but also has occupied specific position on the international
map.
The first set was commission on August 1983 & was dedicated to nation by then PM
(late) Mrs. Indira Gandhi & second set commission on July 1984. The third & fourth units of
CSTPS under stage 2 were commissioned on the 3rd May 1985 & 8th March 1986 respectively.
The units 5 & 6 were commissioned on the 22nd March 1991 & 11th March 1992 respectively one
more units of 500MW was added to the CSTPS on making its generation to 2340 MW &
making “C.S.T.P.S.” as the giant in Power Generation of CSTPS.
With the development of industry and
agriculture, a great amount of energy such as coal, oil
and gas has been consumed in the world. Extensive
use of these fossil energies deteriorates a series of
problems like energy crisis, environmental pollution
and so on. Everybody knows that the fossil energy
reserves are finite, some day it will be exhausted.
It is possible that the world will face a
global energy crisis due to a decline in the
availability of cheap oil and recommendations to a
decreasing dependency on fossil fuel. This has led to
increasing interest in alternate power/fuel research
such as fuel cell technology, hydrogen fuel, biodiesel,
Karrick process, solar energy, geothermal energy,
tidal energy and wind. Today, solar energy and wind
energy have significantly alternated fossil fuel with
big ecological problems.
With the development of the science and
technology, power generation using solar energy and
wind power is gradually known by more and more
people. And it is widespread used in many developed
countries. The merits of the solar and wind power
generation are very obvious-infinite and nonpolluting.
The raw materials of the solar and wind
power generation derived from nature, and wind
power generation can work twenty-four hours a day,
solar power generation only works by daylight. In
addition, this kind of power generation has no
exhaust emission and there is no influence to the
nature. But it also has some shortcomings. Because
of the imperfect of the technology, equipment of the
solar and wind power generation is very expensive.
By far, it cannot be widely used.
In addition, solar and wind power
generation system affected by the changing of the
weather very much, so it has obvious defects in
reliability compared with fossil fuel, and it is difficult
to make it fit for practical use the lack of economical
efficiency .Because of these problems it needs to
increase the reliability of energy supply by
developing a system which interacts Solar and wind
energy. This kind of system is usually called windsolar
hybrid power generation system significantly
Hybrid power generation by and solar –windUday Wankar
With the development of industry and
agriculture, a great amount of energy such as coal, oil
and gas has been consumed in the world. Extensive
use of these fossil energies deteriorates a series of
problems like energy crisis, environmental pollution
and so on. Everybody knows that the fossil energy
reserves are finite, some day it will be exhausted.
It is possible that the world will face a
global energy crisis due to a decline in the
availability of cheap oil and recommendations to a
decreasing dependency on fossil fuel. This has led to
increasing interest in alternate power/fuel research
such as fuel cell technology, hydrogen fuel, biodiesel,
Karrick process, solar energy, geothermal energy,
tidal energy and wind. Today, solar energy and wind
energy have significantly alternated fossil fuel with
big ecological problems.
With the development of the science and
technology, power generation using solar energy and
wind power is gradually known by more and more
people. And it is widespread used in many developed
countries. The merits of the solar and wind power
generation are very obvious-infinite and nonpolluting.
The raw materials of the solar and wind
power generation derived from nature, and wind
power generation can work twenty-four hours a day,
solar power generation only works by daylight. In
addition, this kind of power generation has no
exhaust emission and there is no influence to the
nature. But it also has some shortcomings. Because
of the imperfect of the technology, equipment of the
solar and wind power generation is very expensive.
By far, it cannot be widely used.
In addition, solar and wind power
generation system affected by the changing of the
weather very much, so it has obvious defects in
reliability compared with fossil fuel, and it is difficult
to make it fit for practical use the lack of economical
efficiency .Because of these problems it needs to
increase the reliability of energy supply by
developing a system which interacts Solar and wind
energy. This kind of system is usually called windsolar
hybrid power generation system significantly
This paper presents Grid Solver Bot which is a self-driven vehicle capable of localizing itself in a grid and planning a path between two nodes. It can avoid particular nodes and plan path between two allowed nodes. Breadth-first search & Dijkstra's Algorithm have been used for finding the path between two allowed nodes. The searching of a block over grid is easier when the rows and columns i.e. m* n of a grid is fixed. But when the grid is dynamic or changes over time than in such situation we require a generalized algorithm for traversing over a grid. In these paper we develop an approach for searching an object and also able to avoid an obstacle which was placed in a junction (meeting point of row and column). Here, we use different algorithms like Dijkistra’s, Best first search and A star algorithms. We develop an approach to find the block with minimum shortest path with the help of priority based algorithm. The vehicle is also capable of transferring blocks from one node to another. In fact, this vehicle is a prototype of a self-driven vehicle capable of transporting passengers and it can also be used in industries to transfer different items from one place to another.
Ballarpur Industries Limited (BILT) is a flagship of the US$ 4 bnAvantha Group and India's
largest manufacturer of writing and printing (W&P) paper. The current chairman of the
company is GautamThapar, who succeeded his late uncle L.M. Thapar.
BILT's subsidiaries include Sabah Forest Industries (SFI), Malaysia's largest pulp and paper
company, and BILT Tree Tech Limited (BTTL), which runs BILT's farm forestry programme
in several states in India.
BILT has six manufacturing units across India, which give the company geographic coverage
over most of the domestic market. BILT has a dominant share of the high-end coated
paper segment in India. The company accounts for over 50% of the coated wood-free paper
market, an impressive 85% of the bond paper market and nearly 45% of the hi-bright
Maplitho market, besides being India's largest exporter of coated paper.
BILT’s acquisition of SFI in 2007 was a watershed event – it was the first overseas acquisition
by an Indian paper company. This acquisition transformed BILT into a major regional
player, and elevated the company's ranking among the global top 100.
Ensuring data storage security in cloud computingUday Wankar
Cloud computing has been envisioned as the next-generation architecture of IT enterprise.
In contrast to traditional solutions, where the IT services are under proper physical, logical and personnel controls, cloud computing moves the application software and databases to the large data centers, where the management of the data and services may not be fully trustworthy.
Moving data into the cloud offers great convenience to users since they don’t have to care about the complexities of direct hardware management.
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
(CNN)s, to adversarial attacks and presents a proactive training technique designed to counter them. We
introduce a novel volumization algorithm, which transforms 2D images into 3D volumetric representations.
When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
accuracy improvements over previous techniques. The results indicate that the combination of the volumetric
input and curriculum learning holds significant promise for mitigating adversarial attacks without necessitating
adversary training.
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
2. 2
Introduction
Our project is a persistence of vision display (POV) that spins 360 degrees
horizontally. The purpose of our POV display project is to create a small apparatus that will
create a visual using only a small number of LEDs as it spins in a circle. When the LEDs rotate
several times around a point in less than a second, the human eye reaches its limit of
motion perception and creates an illusion of a continuous image. Therefore, our POV display
demonstrates this phenomenon by creating a visual as the LEDs spin rapidly in a circle and
the person watching will see one continuous image.
Our POV project includes a total of 48 single color LEDs that are stacked vertically
and rotates in a circle on the horizontal plane. The pictures generated by the spinning LEDs
are coordinated by an AVR ATMEGA16 microcontroller and programmed using the software
AVR STUDIO 4. I R sensor is used in conjunction so that the microcontroller can receive a
reference point as to when it should start outputting the visual during each rotation. The
white Pease of paper is placed separately from the rotating platform underneath where the
I R sensor is located.This way, the I R sensor will pass over the white paper during every
rotation. We put the LED board, Atmega16 microcontroller, and a 6V battery (used to power
the microcontroller) all onto a single 2x16 inch platform that is mounted to the top of a
small 230V Exhaust fan. The Exhaust fan is plugged into the wall socket and can be held or
placed firmly on any flat surface for the POV display to function properly.
Persistence of Vision Project Design
Picking LEDs:
The first step to creating our POV display is putting into consideration how many LEDs we
can implement and whether to use single color or RGB (red green and blue colored) LEDs.
We established that eight LEDs stacked in a column will be enough to properly display
images and texts without worries of horizontal and vertical space limits. Since the POV spins
around 360 degrees, we can display visuals around that entire circumference. The problem
we had to consider was whether to use RGB or single colored LEDs. Single colored LEDs
require only an input and ground, while RGB LEDs require three inputs (one for each color)
and a ground connection. Since the Atmega16 microcontroller provides a total of 32 input
and outputs, using single color LEDs was the best choice because there were enough ports
to connect each of the eight LEDs. On the other hand, RGB LEDs would have required a total
of 24 pins (8 green, 8blue, 8 red), which is possible through a multiplexing scheme using the
74HC595 chip connected to the Atmega16 microcontroller. It is also possible to use only
four RGB LEDs that will take up 12 slots on the Atmega16 microcontroller. However, we
concluded that only four LEDs will make the visual too small. Another possibility is to use a
PIC microcontroller that includes 40 pins and a chip programmer to control the RGB LEDs.
Since the 74HC595 chip and the PIC programmer were unavailable, we decided to use 48
single colored SMDs and addressing them by led matrix method.
Constructing the LED Board:
3. 3
Soldering everything that is connected to the Atmega16 microcontroller was
straightforward. We used eight output pins on the Atmega16 microcontroller and
connected each to a 1k ohm resistor that is connected to a single LED and then to the
ground pin of the microcontroller. The resistor before the LED is necessary to stabilize the
current that it’s drawing from the microcontroller. We picked 620 ohm resistors because it
made the LED bright enough to be seen under normal room lighting and not too bright in
the dark.
Next was the IR sensor that is placed facing downwards towards where the white
piece of paper will be. We included a 10k ohm pull-up resistor from the input to the output
so that when the sensor sense white paper, it will act as though it is disconnected. Since the
IR sensor only needed about five volts for it to run, we connected a wire from VDD to the 5V
output pin on the Atmega16 microcontroller. The output of the Hall Effect sensor is
connected to one of the pins on the microcontroller and then declared as an input in our
software program. This way, whenever the IR sensor is not over the white piece of paper, it
will continue to run at 0 volts and the microcontroller will read that input as “LOW.” When
the white piece of paper passes under the sensor, the sensor will output a “HIGH” signal,
telling the microcontroller to start displaying a frame. Below is a picture of our LED display
board.
One other thing we made ourselves was a battery powered source that is mounted
on top of the fan along with the rest of the components. Originally, we planned to use an
external power supply that will be continuously touching a PCB board that is connected to
the microcontroller. The reason is because we cannot use a regular wire from a power
source that is not on the fan to power the microcontroller while it spins, or else the wires
will get tangled. The challenge to this method is finding a way for the wires to be always in
contact with the PCB board, otherwise, the microcontroller will lose power and cease to
function. Since we decided to use a heavy duty fan, it became possible to mount a 6V
4. 4
battery on top of the spinning platform along with the other components to power the
microcontroller. The battery is a bit heavy and added weight and imbalance to the platform,
so we decided to place it in the exact middle. We also soldered together the battery wires
with a round socket plug in head so that is able to connect to the power input of the
Atmega16 microcontroller. In terms of power consumption, the Atmega16 microcontroller
receives 6V from the battery and provides power to the LEDs and IR sensor, and the small
Exhaust fan draws 230V from the power outlet. It is not the most efficient fan, but it works
nicely to create a POV display.
Picking the Motor
The next task, that turned out to be more difficult than we had originally thought,
was picking out the right motor to be used to spin the display. The first thing that is
necessary for the POV display to work properly is a fast spinning motor that has more than
2000 rotations per minute. A motor having 2000 RPMs is equivalent to 33 full rotations
every second. That is more than enough to reach a persistence of vision image that is
comfortable to a human eye. We originally used a small one inch diameter motor that had
2300 RPMs, however, the weight and balancing issues made it very hard for the motor to
pick up speed. We then decided to use a small table fan and a medium sized standing fan.
These fans were heavier duty and can be placed firmly on any surface. The Exhaust fan had
about 400 RPMs and produced an ok visual that seemed a little choppy because the
platform was not perfectly balanced. So the small desk fan with the component mounted on
top of it slowed the rotation speed to about 350 RPMs and that gave us a visual at about 23
frames per second. The medium sized standing fan had a very strong torque and a rotational
speed of about 3000 or more RPMs. The problem with this fan was that it rotated too fast
(even at the lowest rotation setting) and started throwing the components off the platform
even after applying a lot of hot glue and tape. However, it did display a very smooth image
at about 50 frames per second. We decided to use the small Exhaust fan instead of the
medium standing fan due to safety concerns.
Programming the Microcontroller
We used the Atmega16 software provided by the Atmega16 website to program the
microcontroller. In the program, we setup PORT A 8 pins by declaring each pin as an output.
This will allow the microcontroller to provide power to the 8 LEDs whenever it is
programmed to. We then declared pin 1 of PORT D as the input so that the IR sensor can
send a signal to the microcontroller whenever it detects a white piece of paper. Next is a
loop function that will consecutively loop the program for it display our image very quickly
each time the sensor passes over white piece of paper. It uses an “if” and “else” statement
to establish when to display the visual. We set it so that if the sensor reports a low signal
(when there is less than 2 volts present at the pin), meaning that it just passed over white
piece of paper, then it will start displaying the visual very quickly. Otherwise, it will just keep
the LEDs off.
The next step is to create a function that will show a set image whenever it is called
up in the loop function. We used a binary formatter method by creating our own data that
corresponds to each letter in the alphabet and some simple pictures. Since a byte can store
an 8-bit unsigned number from 0 to 255, we used that to create an on and off mark for each
5. 5
of our LEDs. For example, if we wanted to display the letter “N”, we would map out the
letter using “0” and “1” like the shape below. Where “1” will turn the LED on and “0” keeps
the LED off.
B11111111
B00000110
B00001100
B00011000
B00110000
B01100000
B11000000
B11111111
In the function that displays our image, we tell it which image to display and it will go
through all of the data for all the columns in each frame for that image. Timer 1 will tell
the program to create a very short delay (in milliseconds) between each column that is read.
This will shrink or expand the width of each image.
After it goes through every column, the program will turn every LED off so that an
empty space shows up between each image. In the loop function, we initialized another
delay time that will increase or decrease the space between each image.
Scalability Issues
Our POV display can be expanded to include more LEDs. However, as of now it only
has limited ports for expansion. Also, adding more LEDs to the existing design will not work
with our currentAtmega16 program code since the 8-bit binary formatter stops after 8
columns. The POV display can display as many pictures or letters as it can fit in that 360
degree circumference. Increasing the circumference of the rotation will allow for more
6. 6
pictures and letters to be displayed, but that would mean we would need a faster fan and a
longer platform. The balance of the platform will get trickier as the platform length
increases. In terms of getting good visual and readability, it is best to keep the width of the
picture to about an inch or two.
Parts List:
Atmega16 Microcontroller
I R sensor
White paper piece(used with the sensor)
48 single color (Red) LEDs or SMDs (we used SMDs)
6v Battery (supply power to the POV display)
230 V AC supply
Standard socket (for the battery to power the microcontroller)
Experimenters board (2x3 inches)
230 V Exhaust fan
48x 1k ohm resistors
Addressing Scheme
Block Diagram:
Atmega16 Microcontroller Addressing Scheme:
9. 9
SPACE();
T();
h();
a();
n();
k();
SPACE();
y();
o();
u();
}
SPACE();
}
}
Header files:
To display letters we have to give specific code output to leds via microcontroller. This code
unique for a single letter or characters. If we have display a word which consist of double
letter for example word ‘LITTLE’ having double T, so we have write code twice for letter T
which consume time and memory making program long.
So we write function of each alphabets with upper and lower case and characters and
bind together in header file. It gives following advantages:
1. Makes program easy to understand.
2. Small program size.
3. Repetition of code avoided.
4. Consume less memory.
5. Easier to access each alphabets and characters.
This header files are given below:
UPPERERALPHA.h file for upper case alphabets.
LOWERALPHA.h file for lower case alphabets.
DIGITSTODAY.h file for digits and characters.
PROBLEMS FACED:
1. POWER SUPPLY:
Power supply to the motor and IC was a bit of problem tous. We first used carbon brushes to
give ground from the inner side of motor and VCC through axle, but the carbon brushes lowered
the speed of motor. We then give ground from uppers side through carbon brushes, but it
doesn’tmake 100% contacts withmotor.So finallywe usedseparatesupplyforboth.
2. BALANCINGYOUR SETUP:
It’s a crucial problem since your setup will be running at high speed. So wobbling of setup will
give distorted image. Your setup must be horizontal and center of mass of setup must be at the
pointaboutwhichsetupisrotating.To resolve thiswe addedweightthrough
10. 10
M-seal to the poor side tobalance mass on ends.
3. IR detectionathighspeed:
To call the interrupt at high speed, TSOP wasn’t Detecting IR rays. To resolve this you use
transistorstoincrease current throughIR ledand variesto increase sensitivityof TSOP.
CONCLUSION AND FUTURE ASPECT
Our project can display any image of height at most 9 and width around 90 (for good
display) in the POV setup. Our project is basically showing 2-D figure from1-D array of leds.
1. Using multiple microcontrollers we can view POV of large sizes.
2. LED controllers can be used to change intensity of leds and showing HD Images.
3. Rotating a 2-D array of led setup, cool 3-D views can be made which can be viewed from
all the directions.
UTILITY:
It can be used in advertising and marketing campaign.