Potentiometers

What is a potentiometer?



A potentiometer is a variable resistor. Potentiometers enable you to regulate and change the current flowing through a circuit. Potentiometers can also be called pots or potmeters.



Potentiometers have two terminals that are fixed to a resistive element (the track). The resistive element is typically wirewound or made from carbon, cermet or conductive plastic. The third terminal is connected to the wiper, which is a sliding contact. As the wiper moves along the track, the resistance changes and the current flowing through the circuit changes.



Types of potentiometer



Rotary potentiometers are easily controlled by turning a spindle or a knob. Rotary potentiometers can be single turn or multiturn.



Slide potentiometers are also known as slider potentiometers or fader potentiometers. To use a slide potentiometer, it’s simply a case of sliding a fader along a straight track to change the resistance.



Trimmer potentiometers, sometimes called trimpots, are used to calibrate and fine-tune circuits and can be mounted straight onto a PCB (printed circuit board). Trimmer potentiometers are easy to adjust with a screwdriver.



String potentiometers (or string pots) take movement and transform it into an electrical signal.



Membrane potentiometers are completely flat. Membrane potentiometers change their resistance when pressure is applied to the membrane.



Do I need a potentiometer with a linear or logarithmic taper?



The taper you need for your potentiometer depends on the intended application.



For potentiometers with a linear taper, the resistance between one end of the track and the wiper varies at a constant rate. If you turn the potentiometer halfway or slide the fader halfway along the track, the resistance will be half of the total resistance. Linear taper potentiometers are typically used in applications such as light dimmer switches.



For logarithmic taper potentiometers, the resistance does not vary at a constant rate. The level of resistance moves exponentially up or down. A potentiometer that has been turned or moved halfway along its track, will not produce resistance that is half the total resistance. Logarithmic potentiometers are commonly used for audio applications.



What is the difference between a potentiometer and a rheostat?



The key difference is the number of terminals that each device has. Potentiometers have three terminals while rheostats only have two terminals.



Looking for peripherals for your potentiometer?



Potentiometer Knobs

Potentiometer Accessories

Potentiometer Mounting Nuts

...
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Beskrivning Pris Maximum Resistance Potentiometer Type Number of Turns Number of Gangs Mounting Type Power Rating Shaft Diameter Electrical Taper Mounting Hole Diameter Element Material Termination Style Tolerance Series Shaft Length
RS-artikelnummer 831-8817
Tillv. art.nr53C35K
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222,10 kr
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5kΩ Rotary - 1 Panel Mount 2W 6.35 mm Linear - Conductive Plastic Solder Lug ±10% 53C 22.2mm
RS-artikelnummer 831-8772
Tillv. art.nr53C31K
VarumärkeHoneywell
151,27 kr
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1kΩ Rotary - 1 Panel Mount 2W 6.35 mm Linear - Conductive Plastic Solder Lug ±10% 53C 22.2mm
RS-artikelnummer 831-8826
Tillv. art.nr53C35MEG
VarumärkeHoneywell
184,05 kr
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5MΩ Rotary - 1 Panel Mount 2W 6.35 mm Linear - Conductive Plastic Solder Lug ±20% 53C 22.2mm
RS-artikelnummer 831-8810
Tillv. art.nr53C3500K
VarumärkeHoneywell
154,17 kr
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500kΩ Rotary - 1 Panel Mount 2W 6.35 mm Linear - Conductive Plastic Solder Lug ±10% 53C 22.2mm
RS-artikelnummer 831-8790
Tillv. art.nr53C3250K
VarumärkeHoneywell
155,41 kr
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250kΩ Rotary - 1 Panel Mount 2W 6.35 mm Linear - Conductive Plastic Solder Lug ±10% 53C 22.2mm
RS-artikelnummer 831-8762
Tillv. art.nr53C310K
VarumärkeHoneywell
200,70 kr
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10kΩ Rotary - 1 Panel Mount 2W 6.35 mm Linear - Conductive Plastic Solder Lug ±10% 53C 22.2mm
RS-artikelnummer 831-6681
Tillv. art.nr53C1250K
VarumärkeHoneywell
195,32 kr
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250kΩ Rotary - 1 Panel Mount 2W 6.35 mm Linear - Conductive Plastic Solder Lug ±10% 53C 19.1mm
RS-artikelnummer 831-8804
Tillv. art.nr53C32K
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154,17 kr
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2kΩ Rotary - 1 Panel Mount 2W 6.35 mm Linear - Conductive Plastic Solder Lug ±10% 53C 22.2mm
RS-artikelnummer 831-0605
Tillv. art.nr392JA10K
VarumärkeHoneywell
114,05 kr
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10kΩ Rotary - 1 Panel Mount 0.5W 3.18 mm Linear - Conductive Plastic PC ±10% 392 22.2mm
RS-artikelnummer 831-8750
Tillv. art.nr53C3100
VarumärkeHoneywell
151,27 kr
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100Ω Rotary - 1 Panel Mount 2W 6.35 mm Linear - Conductive Plastic Solder Lug ±10% 53C 22.2mm
RS-artikelnummer 831-0487
Tillv. art.nr380C310K
VarumärkeHoneywell
207,63 kr
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10kΩ Rotary - 1 Panel Mount 2W 6.35 mm Linear - Conductive Plastic Solder Lug ±10% 380 22.2mm
RS-artikelnummer 831-6662
Tillv. art.nr53C1100
VarumärkeHoneywell
156,86 kr
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100Ω Rotary - 1 Panel Mount 2W 6.35 mm Linear - Conductive Plastic Solder Lug ±10% 53C 19.1mm
RS-artikelnummer 831-8712
Tillv. art.nr53C15K
VarumärkeHoneywell
157,58 kr
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5kΩ Rotary - 1 Panel Mount 2W 6.35 mm Linear - Conductive Plastic Solder Lug ±10% 53C 19.1mm
RS-artikelnummer 831-0695
Tillv. art.nr73JA2K
VarumärkeHoneywell
734,86 kr
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2kΩ Rotary 10 1 Panel Mount 2W 6.35 mm Linear - Wirewound Solder Lug ±5% 73 -
RS-artikelnummer 831-6704
Tillv. art.nr73JA5K
VarumärkeHoneywell
522,27 kr
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5kΩ Rotary 10 1 Panel Mount 2W 6.35 mm Linear - Wirewound Solder Lug ±5% 73 20.6mm
RS-artikelnummer 831-6678
Tillv. art.nr53C11K
VarumärkeHoneywell
150,86 kr
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1kΩ Rotary - 1 Panel Mount 2W 50.8 mm Linear - Conductive Plastic Solder Lug ±10% 53C 50.08mm
RS-artikelnummer 831-8801
Tillv. art.nr53C3500
VarumärkeHoneywell
154,17 kr
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500Ω Rotary - 1 Panel Mount 2W 6.35 mm Linear - Conductive Plastic Solder Lug ±10% 53C 22.2mm
RS-artikelnummer 831-8716
Tillv. art.nr53C15MEG
VarumärkeHoneywell
169,99 kr
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5MΩ Rotary - 1 Panel Mount 2W 6.35 mm Linear - Conductive Plastic Solder Lug ±20% 53C 19.1mm
RS-artikelnummer 831-8813
Tillv. art.nr53C350K
VarumärkeHoneywell
180,64 kr
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50kΩ Rotary - 1 Panel Mount 2W 6.35 mm Linear - Conductive Plastic Solder Lug ±10% 53C 22.2mm
RS-artikelnummer 831-8807
Tillv. art.nr53C350
VarumärkeHoneywell
131,11 kr
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50Ω Rotary - 1 Panel Mount 2W 6.35 mm Linear - Conductive Plastic Solder Lug ±10% 53C 22.2mm