Showing posts from June, 2012

Capacitor Power Supply circuit

One of the major problems that is to be solved in an electronic circuit design is the production of low voltage DC power supply from Mains to power the circuit. The conventional method is the use of a step-down transformer to reduce the 230 V AC to a desired level of low voltage AC. The most simple, space saving and low cost method is the use of a Voltage Dropping Capacitor in series with the phase line.  IC2 is connected as a differential amplifier and compares the signals at its two inputs. Referring to the  circuit  diagram : the input comprises a mains switch, fuse, transformer, bridge  rectifier  and smoothing capacitor (C2). The difference between the inputs is the voltage drop across 'current’ sensor R4. This IC feeds the current sensing input (pin 2) of the L200. P1 in the feedback loop of the 741 is used to vary the output current of the circuit. IC1 must be mounted on a suitable heat sink as it dissipates nearly all the power of the circuit. The reference level o

stephen hawking into the universe


The first railway on the Indian sub- continent ran over a stretch of 21 miles from Bombay to thane. The ides of a railway to connect Bombay with thane, kalian and with the thal and bhore Ghats inclines first occurred to MR.GEORGE CLARK, THE CHIEF ENGINEER OF THE BOMBAY GOVERNEMENT, during a visit to bhandup in 1843. The formal inauguration ceremony was performed on 16 th April 1853, when 14 railway carriages carrying about 400 guests left bori bunder at 3.30 pm “amidst the applause of a vast multitude and to the salute of 21 guns.” The first passenger train steamed out of Howrah station destined for Hooghly a distance of 24 miles, on 15 th august, thus the first section of the East Indian railway was opened to public traffic, inaugurating the beginning of the railway transport on the eastern side of the sub-continent. In south the first line was opened on 1 st July, 1856 by the Madras railway ran between veyasrspandy and walajah road [Arcot],a distance of distance of


UFO  it is called as the unidentified flying objects. Which are most commonly seen by the american citizens.these flying objects are in the circular shapes having a different technology and fuel used for travelling from one galaxy to galaxy.Till now we have findout  the flying objects in most of the different irregular shapes but most of them are in circular shapes.The first flying object was found in the year 1947 june 24 th which was come into the world publications which was invented by  Jerome Clark . As they are using the reactor technology which we are present using in the submarines and having the proposal of using in aircraft and space ships.The setup the alien spaceships is in the form of the disk shapes the ship body size is 12.2 m in diameter and 4.9 m in height and the total ship is divided into three divisions observation deck, main cabin and gravity generator section.  Gravity generator module: in this there will be number of gravity generators that are place

Introduction to Radar System

|Author :Merrill I. skolnik | "Introduction to Rader System ,  |3 Edition" | 772 pages  | File format  : PDF  |size : 41.2 mb The second edition of "Introduction to  Radar Systems ," there has been continual development of new radar capabilities and continual improvements to the technology and practice of radar. This growth has necessitated the addition and updating of the following topics for the third edition:  digital technology , automatic detection and tracking, doppler technology, airborne radar, and target recognition. The topic coverage is one of the great strengths of the text. In addition to a thorough revision of topics, and deletion of obsolete material, the author has added end-of-chapter problems to enhance the "teachability" of this classic book in the classroom, as well as for self-study for practicing engineers. " CLICK HERE FOR DOWNLOAD"

youth into politics

Every one of the student in the country and the world think for a while that how can we really stop the corruption and other illegal activities around you. You all know that in each and every thing or any work we mingle with it. According to the present conditions in India and other foreign countries there is large amount of the corruptions all among the world which results in the gradually deceasing the development of the countries.There should be a right choosing of the political person because in the present days maximum people in the countries are well educated can make a right choice. Please don't take or get degrade by taking the money from the elected members in election in any of the countries mostly in INDIA.      "THINK BEFORE YOU ACT" WHICH IS A RESPONSIBLE JOB IN YOUR LIFE

Acts of Environment

some of the acts that are raised by the governments: 1. THE ENVIRONMENT [PROTECTION] ACT,1986 the potential scope of the Act is broad, with "ENVIRONMENT" defined to include water, air and land and the inter-relationship which exists and between water, air and the land, and human beings and other living creatures, plants, micro-organisms and property. 2. UNDER SECTION 7 No person carrying on any industry, operation or process shall discharge or permit to be discharge or emitted any environmental pollutants in excess of prescribed standards. 3. UNDER SECTION 15 if any one fails to comply with or contravenes any of the rules/provisions of this Act shall be punishable with imprisonment for a term of 3-5 years with fine of $10,000 or both. in case the failure or contravention continues, additional fine may be charged up to $500-1000 per day which continuous. 

Tips to avoid Global warming

"SAVE THE ENVIRONMENT FROM GLOBAL WARMING" 1. save oil and save the energy. 2. harvest by rain fall. 3. conserve water and the limited amount as required. 4. recycle paper and water. 5. try to carry jute bags or cloth Bags to the shopping mall and try to avoid the plastic bags. 6. plant and Nurture trees by each and every person of the earth. 7. Always Dispose the E-waste properly 8. save the electricity by using the Compact Fluorescent Light [CFL]     lamps. 9. try to install the solar electrical system at least in a single room and gradually increase it into the complete house So, that this makes a little experience to work/maintenance on it. 10. Adopt a green technology towards the buildings.        

World's Environmental Day

On 5th of June is considered as the World's Environmental Day. On celebrating the worlds environmental day just talk frankly for some time that how many people are supporting and talking about the nature. on this day all the people of the nations should have the awareness on the environment and its importance of it. friends every take it serious of our "EARTH" and try to increase the life of the earth which is gradually decreasing  this may preach the man kind on earth. In future the temperature of the earth is increasing and standing in the critical position as the technology is upgrading the industrial revolution is more advancing and the man is in search of the energy and forgetting about the earth conditions. Coming 40 years the temperature is going to increased to 4 degrees and in next 100 years in temperature raises to 11 degrees. All the things will over heat and geological set of the earth will be disabled and their will not be any existing nature or livin