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Showing posts from July, 2014

How to read colour codes from resistors

The value of the resistor is marked on the body using colors. Every color is different number and you can remember these numbers or you can just use the table on next step. OR there are much resistor calculators that you can use. It's for the laziest people :D . However it's your decision ,and I will show you all ways to calculate resistor value. COLOURS Here is the table with the colors and numbers. As you can see they are: BLACK: 0 BROWN: 1 RED:           2 ORANGE: 3 YELLOW: 4 GREEN:       5 BLUE: 6 VIOLET:      7 GREY: 8 WHITE: 9 But this is not for all colors. From right to left the second color is multiplier. Digits from the first colors must be multiplied with the number of this color. BLACK: 1 BROWN: 10 RED:           100 ORANGE: 1000 YELLOW: 10000 GREEN:       10000...

WAR OF CURRENTS

Thomas Edison, American inventor and businessman, known as "The Wizard of Menlo Park", pushed for the development of a DC power network. In the "War of Currents" era (sometimes, "War of the Currents" or "Battle of Currents" ) in the late 1880s, George Westinghouse and Thomas Edison became adversaries due to Edison's promotion of direct current (DC) for electric power distribution over alternating current (AC) advocated by several European companies [1] and Westinghouse Electric based in Pittsburgh, Pennsylvania, which had acquired many of the patents by Nikola Tesla . The direct-current system generated and distributed electric power at the same voltage as used by the customer's lamps and motors. This had the effect of large, costly, distribution wires and forced generating plants to be near the loads. With the development of a practical transformer, power could be sent long distances over relatively small wires at...

OHMS LAW

V, I, and R, the parameters of Ohm's law.              Ohm's law states that at constant temperature ,the current through a conductor between two points isdirectly proportional to the potential difference across the two points.