A potentiometer is a device that plays the role of a current regulator. It is also capable of handling the functions of a rheostat. Resistors on models are used with tap contacts. In the electronics industry, potentiometers are quite in demand.
Devices differ in the number of cycles supported. The through resistance of the models averages 6 ohms. Quite often, devices are used as volume controls. They are also installed in various computing devices. The bandwidth of the model depends on its components. The price for them fluctuates around 300 rubles.
Device diagram
A standard potentiometer circuit consists of a resistor, contacts, and terminals. Keys for models are used with different conductivity. Some modifications have diodes installed. Resistors are often used passive type. Two pins for connecting the device are located at the bottom of the case.
Unipolar Power Models
These potentiometers have rheostat switches. Resistors in this case are used passive type. Mobile contacts in models have high current conductivity. The key bandwidth depends on the cutoff frequency. This parameter averages 2000 kHz. For tone controls, the indicated potentiometers are well suited. There is an average model on the market in the region of 250 rubles.
Bipolar devices
Devices with bipolar power are used exclusively in computer technology. A distinctive feature of the models is considered to be a high level of permissible resistance. The keys for potentiometers are often of the rheostatic type. At the bottom of the designs there are two pins for connecting to the circuit. Direct calibration of the device is carried out on bridge circuits. The minimum resistance spread is 2%. The negative voltage of the potentiometers can reach a maximum of 3.5 V. You can purchase models of this type on the market for about 300 rubles.
Mechanical modifications
A mechanical potentiometer is a current control device that is equipped with a rotary controller. In the lower part of the design, the models have two outputs. Keys are most often used in a resistive type. A software sampling function is provided for models. The through resistance of the device is maintained at 3.5 ohms. Most models do not have a 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 used open type. Mechanical potentiometers are well suited for reverse control. Most models do not have a rheostat mode. It is also important to note that models are not used to adjust gain. Permissible positive voltage is an average of 2.4 V. The cases for models are used with the marking PP20 and T23. The cutoff frequency on average does not exceed the level of 2400 kHz. The bandwidth itself depends on the key parameters. These potentiometers are rarely installed in computing devices. You can buy a model of this type on the market for only 230 rubles.
Electronic models
An electronic potentiometer is a device that is designed to adjust the current. Most modifications are equipped with two keys. Resistors are often used in resistive type. For reverse control, most models are suitable. Maximum devices are capable of supporting 10 cycles. Almost all versions have a function of software sampling. It is also important to mention that potentiometers of this type are often used as volume controls. Linear distortion in them reaches -80 dB.
Computing devices often include these devices. Their cutoff frequency , as a rule, does not exceed 3000 kHz. The key bandwidth parameter is on average 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 adjust the gain. An average electronic potentiometer costs around 350 rubles.
Models Skal 103
Skal 103 (potentiometer) is a device that is designed to adjust the resistance in an alternating current circuit. The contacts in this case are of the movable type. The model has only one key. The passive resistor in the device is located near the terminals. The software sampling function of the model is provided. Calibration of the device is carried out according to bridge circuits. It is also important to note that the model does not have a rheostat mode.
The gain is adjusted in levels. The case in this case is installed with the marking PP20. The cutoff frequency of the device is a maximum of 23,000 kHz. In turn, the linear distortion index is not more than -80 dB. The spread of resistance depends on many factors. You can purchase this modification on the market at a price of 200 rubles.
Skal 105 device specifications
The indicated automatic potentiometers are used in circuits with alternating current only. The key in this case is near the terminals. The resistor is used passive type. If we talk about the parameters, it is important to note the high cutoff frequency. Thus, this model is suitable for computing devices. The linear distortion index at her maximum is 56 dB.
The case is used with marking T23. The maximum variation in resistance does not exceed 3.2%. Very often, the indicated potentiometer is used to adjust the measuring channel. Diodes in this case are provided of an integrated type. A one-time memory supports the indicated potentiometer. The user can buy this model on the market for only 350 rubles.
Skal 107 model parameters
The indicated potentiometer has a cutoff frequency of 2400 kHz. The key in the model is used in a resistive type. Passive resistors in the model are located at the bottom. The case in this case is installed with the marking PP21. The model bandwidth does not exceed 2.3 microns. It is also important to note that the potentiometer has a rheostat mode.
For reverse control, this device can be used. The through resistance is 3 ohms. A single memory is supported by the indicated potentiometer. The maximum variation in resistance does not exceed 3.4%. It is possible to buy the specified model nowadays at a price of 200 rubles.
EP1200 device
To connect to the circuit, this model has two outputs. The key is used rheostat type. This model has a software sampling function. In total, the device can support no more than four cycles. The cutoff frequency of the model does not exceed 2300 kHz. Very often, a potentiometer is installed in computing devices. It is also suitable for tone controls. There is a modification in the market of about 360 rubles.
EP3000 Model Description
The presented digital potentiometer is characterized by a small variation in resistance. The case has a protected type. The rheostat switch in this case is located near the terminals. There is only one resistor. The model has a software sampling function. Calibration of the device occurs according to bridge circuits. However, it should be noted that the device is not suitable for setting filters. He also does a poor job of adjusting the gain. There is a modification in stores of about 300 rubles.
Characteristics EP2110
This digital potentiometer is used for reverse control. The key is provided for him rheostat type. At the bottom of the device are two pins. It is also important to note that the model has a software sampling function. Calibration of the modification is carried out automatically. In this case, bridge circuits are not involved.
The specified device can only be used in an alternating current network. The permissible positive voltage is 3.4 V. The cutoff frequency in this case is at around 2400 kHz. The through resistance of the device can withstand a maximum of 7 ohms. Linear distortions are not terrible for the presented potentiometer. It is also important to note that the model can be used to configure the measuring channel. It is easy to buy a modification on the market at a price of 300 rubles.
Paxphil H25 modification review
The presented throttle potentiometer is designed to operate only in an alternating current circuit. The key to the model is a rheostat type. The housing itself is used with the PP20 marking. The potentiometer is adjusted via a rotary mechanism. The bandwidth of the model reaches a maximum of 2.3 microns. This potentiometer is not afraid of linear distortion.
It is also important to note that the device cannot 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. In our time, there is a modification of about 200 rubles.
Paxphil H30 device
The indicated throttle potentiometer is made with the function of program sampling. The findings in this case are at the bottom of the device. Model calibration is carried out automatically. The maximum through resistance reaches 6 Ohms.
It is also important to note that the model is not suitable for adjusting the gain. Its cutoff frequency does not exceed 2100 kHz. Linear distortion maximum allowed at -90 dB. The resistance spread of these potentiometers sometimes reaches 2%. Once memory is not supported by the indicated devices.