See TALKING ELECTRONICS WEBSITE email Colin Mitchell: talking@tpg.com.au For our other free eBooks: 50 - 555 Circuits 1 - 100 Transistor Circuits 101 - 200 Transistor Circuits 100 IC Circuits For a list of every electronic symbol‚ see: Circuit Symbols. For more articles and projects to suit the hobbyist: see TALKING ELECTRONICS WEBSITE INTRODUCTION This e-book covers a number of interesting circuits. They have been presented for
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The Enigma Machine and How it Worked.-Ibrahim Rashid What is the Enigma Machine: The enigma machine was a coding device that was used by the Germans during World War 2 to write‚ send‚ and decipher encrypted messages. How did it work: The enigma machine was a very complicated device. On the inside of the machine there were three rotors that contained all 26 letters of the alphabet. What would happen was that when someone would press a letter on the keyboard‚ a different letter would pop up on
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CUTTING MOTION IN MACHINE TOOLS A machine tool is a machine for making components of a given shape‚ size and accuracy as per the requirements by removing material from the workpiece by using a cutting tool to operate upon the workpiece. Machine tools are capable of producing themselves therefore the machine tools are quite often referred to as mother machine. In the manufacturing processes‚ machine tools are the most versatile and almost any product can be produced with them. The machine tools should
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to work in terrible conditions for long hours. Why would you let children of all people work in such terrible‚ unhealthy‚ unsanitary‚ and hazardous conditions? * Save the Little People (SLP) That’s what I call my little sisters * Demands: 1. Children shouldn’t be working in an unsafe environment 2. Children Should work shorter hours 3. Children should be strengthening their education 4. Children will need more breaks than usual 5. Children shouldn’t be working all the time
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machinist and mechanic contributed to what he did next. Around spring 1845‚ Elias Howe had invented the sewing machine. On September 10th‚ 1846 a patent for a sewing machine was granted to him. His machine was five times faster than other sewing machines and was the most significant project in his life time. The Lockstitch Sewing Machine Patent # 4‚750: Elias Howe’s sewing machine. It featured a lockstitch design which included three significant parts. The first was needle with an eye point
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Flotation machine is the most important equipment in the process of flotation. In addition to the reagents‚ the technological process‚ the performance of the flotation machine has considerable influence on flotation effect. Flotation machine can be divided into: mechanical agitation type flotation machine‚ inflatable flotation machine‚ the hybrid flotation machine or air mixing type flotation machine‚ air- releasing flotation machine. (1) The mechanical agitation type flotation machine Pulp
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ATTACHMENT IN DRILLING MACHINE SYNOPSIS There are number of machine tools producing round and taper holes. But many engineering components require square and non-circular holes. At present square and other non holes are produced using CNC machines or spark erosion or slotting machines. But there is no quality machine tool to produce square and polygon holes at minimum cost. Thus we made an attempt to design and fabricate an attachment for drilling machine which would produce square and polygon
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What is Ohm’s Law: Ohm’s Law is made from 3 mathematical equations that shows the relationship between electric voltage‚ current and resistance. What is voltage? An anology would be a huge water tank filled with thousands of gallons of water high on a hill. The difference between the pressure of water in the tank and the water that comes out of a pipe connected at the bottom leading to a faucet is determined by the size of the pipe and the size of the outlet of the faucet. This difference
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it compares items of deferent characteristic showing similarities but not differences. Metaphors can be numerous‚ teacher as metaphor‚ leader as metaphor‚ and software as metaphor. Two major types of metaphors are machine and mind A) Organisation as a machine Organisations as machine have strict processes and chains of command with a hierarchical‚ top down style of management. Organisation has number of departments which does specific type of functions‚ defined jobs and responsibilities. Management
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"The Machine That Won the War‚" by Isaac Asimov‚ is a story that teaches a valuable lesson about humanity and also has an ironic twist at the end. The setting is the future of Earth‚ and a great war had just been won against an enemy race. Two men‚ Swift and Henderson‚ are debating over who really won the war for Earth: the giant strategy computer known as Multivac‚ or the men in charge of making the maneuvers and programming the computer. John Henderson is an excitable man‚ while Lamar
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