Potentiometer - what kind of device is it?

A potentiometer is a device that plays the role of a current regulator. It is also able to cope with the functions of the rheostat. Resistors for models are used with tap-off contacts. In the electronics industry potentiometers are quite in demand.

There are different devices by the number of supported cycles. The impedance of the models is 6 ohms on average. Quite often devices are used as volume controls. They are also installed in various computers. The bandwidth of the model depends on its components. The price for them fluctuates around 300 rubles.

Device Diagram

The standard potentiometer circuit consists of a resistor, contacts and terminals. The keys for the models are used with different conductivity. Some modifications have diodes. Resistors are often of a passive type. Two contacts for connecting the device are located at the bottom of the case.

Models with unipolar power supply

These potentiometers are distinguished by the presence of rheostatic keys. Resistors in this case are of a passive type. Movable contacts for models have a high current conductivity. The bandwidth of the key depends on the cutoff frequency. This parameter averages 2000 kHz. The specified potentiometers are suitable for tone controls. It is an average model in the market around 250 rubles.

Devices with bipolar power supply

Devices with bipolar power are used exclusively in computer technology. A distinctive feature of the models is considered to be a high level of allowable resistance. The keys for potentiometers are often used rheostat type. At the bottom of the structures there are two terminals for connecting to the circuit. The instrument is calibrated directly on bridge circuits. The minimum spread of resistance is 2%. The negative voltage of potentiometers is maximum able to reach 3.5 V. You can buy models of this type on the market for about 300 rubles.

Mechanical modifications

A mechanical potentiometer is a device for adjusting the current, which is equipped with a rotary controller. In the lower part of the design, the models provide two conclusions. Keys are most often used resistive type. The function of program selection for models is provided. The through resistance of the device is maintained at 3.5 ohms. Most models lack the calibration function. The permissible negative voltage of the potentiometers fluctuates around 3.5 V. The linear distortion index reaches a maximum of -90 dB.

Resistors are often of the open type. For reverse control, mechanical potentiometers fit well. Most models do not have a rheostat mode. It is also important to note that the models are not used to adjust the gain. The permissible positive voltage is 2.4 V on the average. The cases for the models are used with the markings PP20 and T23. The cutoff frequency on the average does not exceed 2,400 kHz. The bandwidth itself depends on the key parameters. These potentiometers are rarely installed in computers. You can buy this model on the market for only 230 rubles.

Electronic Models

An electronic potentiometer is a device that is designed to regulate current. Most modifications are equipped with two keys. Resistors are often used resistive type. Most models are suitable for reverse control. Maximum devices are capable of supporting 10 cycles. Almost in all versions there is a function of program selection. It is also important to mention that potentiometers of this type are often used as volume controls. Linear distortions in them reach -80 dB.

Computing devices often include these devices. The cutoff frequency , as a rule, does not exceed 3000 kHz. The parameter of the key passband is equal to an average of 3.5 microns. However, in this case, much depends on the manufacturer. Some models are used to configure filters. However, they are not able to regulate the gain. It is an average electronic potentiometer in the region of 350 rubles.

Models of Skal 103

Skal 103 (potentiometer) is a device that is designed to adjust the resistance in an AC circuit. Contacts in this case are of a mobile type. The model has only one key. A passive resistor in the device is located near the terminals. The program selection function is provided for the model. The instrument is calibrated by bridge circuits. It is also important to note that the model does not have rheostat mode.

Adjustment of the gain is done by levels. The housing is in this case installed with the marking PP20. The cutoff frequency of the device is at most 23000 kHz. In turn, the index of linear distortions is no more than -80 dB. The spread of resistance depends on many factors. Buy this modification on the market can be priced from 200 rubles.

Skal 105 specifications

These automatic potentiometers are used in circuits with only alternating current. The key in this case is near the conclusions. The resistor is of a passive type. If we talk about parameters, then it is important to note the high cutoff frequency. Thus, this model is suitable for computers. The indicator of linear distortions at it is equal at most 56 dB.

The housing is used with the T23 marking. The maximum variation in the resistance does not exceed 3.2%. Very often, this potentiometer is used to adjust the measuring channel. Diodes in this case are built in type. A single memory supports the indicated potentiometer. Buy this model on the market the user can only for 350 rubles.

Parameters of model Skal 107

The specified potentiometer has a cutoff frequency of 2400 kHz. The key for the model is of the resistive type. Passive resistors in the model are located at the bottom. The housing in this case is installed with the marking PP21. The bandwidth of the model does not exceed 2.3 microns. It is also important to note that the potentiometer has a rheostat mode.

For reversible control, this device can be used. The through resistance of it is 3 ohms. A single memory is supported by the specified potentiometer. The maximum spread of resistance does not exceed 3.4%. Buy the specified model in our time can be priced from 200 rubles.

Device EP1200

To connect to the circuit, this model has two outputs. The key is used rheostat type. In this model, the software sample function is provided. In total, the device can support no more than four cycles. The cutoff frequency of the model does not exceed 2300 kHz. Very often the potentiometer is installed in the computers. It is also suitable for tone controls. It is worth modifying the market for about 360 rubles.

Description of the model EP3000

The presented digital potentiometer differs by a small spread of resistance. The case at it is established of the protected type. The rheostatic key in this case is located near the terminals. A resistor is provided for only one. The model has a function of program selection. The device is calibrated by bridge circuits. However, it should be noted that the device is not suitable for setting filters. He also does poorly with the adjustment of the gain. It is worth modification in stores about 300 rubles.

Characteristics of EP2110

This digital potentiometer is used for reverse control. The key is provided in rheostat type. There are two terminals at the bottom of the device. It is also important to note that the model has a function of program selection. Calibration of the modification is carried out automatically. In this case, bridge circuits are not involved.

Use the specified device is possible only in a network with alternating current. The permissible positive voltage is 3.4 V. The cutoff frequency in this case is at 2400 kHz. The through resistance of the device can withstand a maximum of 7 ohms. Linear distortions are not dangerous to the potentiometer presented. It is also important to note that the model can be used to adjust the measuring channel. Buy a modification on the market easily at a price of 300 rubles.

Overview of the modification of Paxphil H25

The presented throttle valve potentiometer is designed to work only in an AC circuit. The key has a rheostatic type. The housing itself is used with the PP20 marking. Adjustment of the potentiometer is carried out through the rotary mechanism. The bandwidth of the model reaches a maximum of 2.3 microns. This linear potentiometer is not afraid of linear distortions.

It is also important to note that the device can not be used to adjust the measuring channel. The resistor in this case is a passive type. The permissible positive voltage of the model is 3.3 V. It is worth in our time a modification of about 200 rubles.

Device Paxphil H30

The specified throttle potentiometer is produced with the function of program selection. Conclusions in this case are at the bottom of the device. The model is calibrated automatically. The maximum through resistance reaches 6 ohms.

It is also important to note that the model is not suitable for gain adjustment. The cutoff frequency does not exceed 2100 kHz. Linear distortions are allowed at a maximum of -90 dB. The spread of resistance in these potentiometers sometimes reaches 2%. One-time memory does not support these devices.