Here are a few types of resistors:. The different types have different properties. Some are very accurate, some can withstand high temperatures, some can withstand high power and some are cheap.
Some are good for low noise applications, some are good for high-power applications, some for high-speed applications and some for measurement circuits. If you want to learn more about the specific resistor types, I recommend checking out www.
First of all, you need to choose the resistance value. One common example is to find the resistor value you need for an LED. Next, you need to consider the power that the resistor needs to dissipate. Power dissipation in a resistor can be calculated with the formula. In this circuit, we use a LED with a voltage drop of about 2V. We found that the resistor should have a value of Ohm. The circuit is powered by a 9V battery. To answer this, we first find the voltage drop over the resistor. A rule of thumb is to find a resistor with twice the power rating.
Here I would choose a mW resistor since those are the most standard ones. Even though the actual resistance of the component is of paramount importance, other characteristics also need to be taken into consideration. Power dissipation, noise, inductance, thermal stability and a number of other characteristics may all have a bearing on the operation of the circuit in which the resistor is used.
Different materials and different structures within the resistor can have a major impact. Accordingly when selecting a resistor to be used, these characteristics must also be taken into consideration. The first major categories into which the different types of resistor can be fitted is into whether they are fixed or variable.
These different resistor types are used for different applications:. Whilst the majority of resistors are standard fixed resistors or variable resistors, there is a number of other resistor types that are used in some more niche or specialised applications. Although resistors may be thought of as simple electronics components to use, there are a number of parameters that need to be considered when choosing the correct resistor type. Parameters apart from just the resistance are important.
Voltage withstand, power dissipation and the actual type of resistor itself all have an impact on the performance. With a variety of resistor types available, it is necessary to choose the correct type for any particular application. In this way the best performance can be assured. Selection of fixed leaded resistors or various types What is a resistor? Note on Resistance: Resistance is one of the key factors used in electricla and electronic circuits.
So these are suitable for Arduino starter kits. The main drawback of this resistor is extremely sensitive to temperature. This resistor generates some electric noise because of the electrical current flow from one particle of carbon to another particle of carbon.
These resistors are applicable where the low-cost circuit is designed. These resistors are available in a different color band which is used to find out the resistance value of the resistor with tolerance. The resistance of these resistors is constant or they obey the ohms law.
When the voltage is applied across this resistor, while measuring voltage and current, plot a graph in between voltage and current. The graph would be a straight line.
Most of the simple electronic circuits use ohmic resistors or linear resistors. These are normal components used to limit the flow of current, select frequency, divide voltage, bypass current, etc. Carbon resistor is one of the most common types of electronics used. They are made from a solid cylindrical resistive element with embedded wire leads or metal end caps. But, the electrical resistivities of most of them have less, not like a carbon resistor, which creates it complex to generate high resistances without turning into huge.
They also regenerate resistance quite well in practical applications. As compared with metal wires, which are costly to generate, carbon is plentifully obtainable making it inexpensive. The two things which need to keep in mind while using a resistor are power dissipation as well as temperature coefficients. While selecting a resistor, power dissipation plays a key role. Always choose a resistor that has less power rating as compared with what you placed through it.
So select a resistor with a power rating as a minimum of two times high. The most important thing to keep in mind while using resistors is, it is used with high temperatures otherwise high current as the resistance flows drastically. For a negative temperature coefficient, when the temperature around the resistor increases then the resistance will decrease for the resistor.
For a positive temperature coefficient, the resistance will increase once the temperature around the resistor increases. So, the same principle also works for some sensors like Thermistors for measuring temperature. This sequence color code helps to find the resistor value by seeing colors on resistors. To calculate the color code of the above 4 band resistor, the 4-band resistors consist of colors: yellow, violet, orange, and silver.
In the above 5 bands resistors, the first three colors indicate significant values, and the fourth and fifth colors indicate multiplying and tolerance values. To calculate the color code of the above 5 band resistor, 5 band resistors consist of colors: blue, grey, black, orange, and gold.
In the above 6 bands resistors, the first three colors indicate significant values; the Fourth color indicates multiplying factor, the fifth color indicates tolerance and the sixth indicates TCR. To calculate the color code of the above 6 color-band resistors, 6 band resistors consist of colors: green, blue, black, yellow, gold, and orange. This is all about different types of resistors and the color-code identification for resistance values.
We hope that you might have understood this resistor concept , and therefore, would like you to share your views on this article in the comment section below. Share This Post: Facebook.
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