LEEVENSPARK

It costs 38 Trillion dollars to create OXYGEN for 6 months for all Human beings on earth. "TREES DO IT FOR FREE" "Respect them and Save them"   After the industrial revolution started in the world till now the pollution around the globe has increased drastically.  Now the global warming is all around the world. So, friends get awareness of the present conditions of our earth and try to make a solution to decrease the pollutants all around you. 1. Try to keep your surroundings clean and grow more amount of trees your house. That helps to produce more amount of oxygen by taking Carbon dioxide[co2] which keeps your health clean and pure and increase the life spam of the human beings and animals. 2. At the same time find a solution to use the rain water in a proper way, By diverting it to the storage tanks through filtration process [or] moving it to the gardens and other implementations like producing the alternative power source. 3. If the pollut

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

|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"

Sleeping warm If you are on-board with the sentiment that we should strive to reduce the amount of energy we consume as a means to relieve pressure on a world suffering impending energy scarcity, then you probably want to know how one might proceed. In this post, I will describe the single-biggest energy-saving strategy I have employed in my home in the past five years, which slashed my natural gas consumption by almost a  factor of five . Last week, I described how to read gas meters, in the process discovering  how onerous pilots lights can be . As a result of initial exploration of my energy footprint in the spring of 2007, I shut off the furnace pilot light for the summer, which I figured accounted for  two-thirds  of my warm-season natural gas use. When winter came, my wife and I challenged ourselves to hold off on re-igniting the pilot light until it got too cold for us to bear. That day never came. The result was a dramatic reduction in natural gas use. In this post, I will tal