Thursday, January 10, 2013

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Potentiometer is a variable resistor that is used most often. In general, a potentiometer made ​​of wire or carbon. Potentiometer is made ​​of wire potentiometer that has long born at the time of the first generation electronic circuits still use vacuum tubes (vacuum tube). Potentiometer of wire has a fairly large form, so it's been rare that use a potentiometer like this. At this time, more potentiometers are made of carbon. Its size is smaller, but with great resistance. The picture on the side is a potentiometer made ​​of carbon. In general, changes in the potentiometer resistance is divided into two, namely linear and logarithmic. The definition of change is linearly proportional to the resistance value changes governing the direction of rotation. Meanwhile, is the logarithmic change is a change in resistance value is based on a logarithmic calculation. In general, the logarithmic potentiometers have a resistance change which is quite unique because the maximum value of the resistance is obtained when we have melakaukan half times round the governing. Meanwhile, the minimum value is obtained when governing is at the zero point or the point of maximum rotation. In order to determine whether the linear or logarithmic potentiometer, can be seen letters that are printed on the back of his body. If printed the letter B, the potentiometer is logarithmic. If the letter A, the linear potentiometer. In general, the resistance value is also printed on the front of the body. Value listed is the maximum resistance value of the potentiometer.

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