What is a potentiometer?
Mar 21, †Ј Within the control potentiometers we have: Rotary potentiometers. They will be controlled by turning their axis. They are the most used for their long duration and Sliding potentiometers. It is controlled by running a cursor in a straight line. They are used in graphic equalizers. Adjustment or. Jan 22, †Ј Potentiometers are a form of electrical resistors. While not designed to carry a great deal of electrical current, they are often ideal for small jobs. A potentiometer is helpful in such common tasks as adjusting the volume level on a radio, or changing channels on some types of television sets.
The Potentiometer. What is it? A potentiometer is a three-terminal resistor where resistance can be manually adjusted to control the current flow. Through today blog, you will learn:. Currently, there are various Potentiometers out in the market. There are manually adjustable Potentiometers and there are also electronically controlled potentiometers.
So without further ado, let us jump right in to the first type of Potentiometers. Potentiometers are associated with a concept called the Taper which is the relationship between the position and the resistance of the potentiometer. They are further differentiated according to their track which are:. Due to its characteristics and features, there are many different uses for a potentiometer. Some of them are:. You can check out my other blog on the Voltage Divider here! And you are done!
If everything is done correctly, you should be able to see this when you play around with how to find out if my partner is cheating Slide Potentiometer:.
Those are some applications and uses of the potentiometer! Interested in doing projects and making stuff with your Potentiometer? Here are some projects ideas for you:. Something to note when picking a potentiometer for your project, do consider these various factors: Humidity, Operating Temperature, Contamination and Seals, Shock and Vibration and Lifecycle to pick the best potentiometer for your project!
Looking for other resistors other than potentiometers? See author's posts. Skip to content. Search for:. Ref: Electrical4u. Grove Ч Rotary Angle Sensor. Grove Ч Slide Potentiometer.
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Jan 31, †Ј A Potentiometer or simply known as POT, is a three-terminal device with manually adjustable resistance using a movable contact. We all are familiar with Resistors. They are simple electrical devices which resist the flow of current in a circuit. Normal resistors usually have . What is a Potentiometer (POT)? A potentiometer is a variable resistor with three terminals whose voltage is adjustable manually with the help of a movable contact, in order to control the flow of electric current through it. Every variable resistor will have some kind of mechanical or electronic control to vary its resistance, based on the variation of this resistance the voltage across it and current through it is . What Is a Potentiometer? They have three terminals (or connection points). They have a knob, screw, or slider that can be moved to vary the resistance between the middle terminal and either one of the outer terminals. The resistance between the two outer terminals is a fixed (constant) resistance.
In this tutorial, we will learn about Potentiometers. We will see what is a potentiometer, its construction and symbol, its working, different types of potentiometers, application of potentiometer as Rheostat and Voltage Divider and also Potentiometer Taper. A Potentiometer or simply known as POT, is a three-terminal device with manually adjustable resistance using a movable contact. We all are familiar with Resistors. They are simple electrical devices which resist the flow of current in a circuit.
Normal resistors usually have fixed resistance. But what if you want vary the resistance as per the needs of your application? This is where Potentiometers come into play. Since they are essentially resistors but with variable resistance, the symbol of a potentiometer is also close to that of a resistor. The following image shows the symbol of a potentiometer. This symbol means a resistor with terminals 1 and 3 and sliding contact terminal 2. You will better understand this if we take a look at the construction of a typical potentiometer.
In rotating contact type potentiometers, there is a resistive track which is connected between terminals 1 and 3. A sliding contact, also known as Wiper, will move from end-to-end of the resistive track to vary the resistance.
Let us now see how a potentiometer works. If you measure the resistance between the outer terminals, then you will always measure the maximum value rated value of that POT.
But, if you measure the resistance between one of the outer terminals and the Wiper terminal, then you will get a value that is dependent on the position of the Wiper. So, based on the terminals used, you can use the potentiometer as a simple Variable Resistor, also known as a Rheostat or a Voltage Divider.
A Potentiometer can work as a Rheostat by making use of just two of its terminals: One is the Wiper and the other is either of the two outer terminals. In this case, the POT acts as a two terminal variable resistor. Another useful application of Potentiometers is they can be used as Voltage Dividers. If you remember, a Voltage Divider Circuit consists of two resistors connected in series. A voltage is applied at ends of the resistors and an output voltage is taken across a resistor.
This simple circuit is used to convert a high voltage to a low voltage. With the help of potentiometer, you can build a similar voltage divider by using all the three terminals.
An input voltage is applied between the outer two terminals of the POT and the output voltage is taken between the wiper and the outer terminal which is connected to GND of the input supply. Since a POT allows you to vary the resistance, you can essentially vary the output voltage of the Voltage Divider. Hence, this is a Voltage Divider with a variable output voltage. Even though the function is same, there are different types of Potentiometers available for various applications and use cases.
Some of the popular types of POTs are mentioned below:. There are several characteristics of Potentiometers but one that stands out is called the Taper. This characteristic is the relation between the position of the Wiper and the amount of resistance. Potentiometers are usually classified as in to two types based on the Taper characteristic. They are:. The most commonly found Potentiometers are of Linear Tapper type. In this type, the relation between the position of the Wiper and the resistance is linear.
They are also called as Audio Taper as they are essentially used in audio control applications volume control. As the name suggests, in a log taper POT, the relation between resistance and wiper position is logarithmic. You learned about some basics of Potentiometers, its working, electrical symbol and mechanical construction, two of the common applications and also different types.
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