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

...
Voir plus Voir moins

Filtres

Afficher 1 - 20 des 2071 produits
Nombre de résultats par page
Description Prix 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
N° de stock RS 812-831
MarqueRS PRO
42,82 €
Each
Unité
2.5kΩ Rotary 1 4 Panel Mount 1.5W 6.35 mm Linear - Wirewound Solder Lug ±10% CLR4000 -
N° de stock RS 317-780
MarqueRS PRO
32,14 €
Each
Unité
5kΩ - 1 - Panel Mount - 3 mm Linear - Conductive Plastic Wire Lead ±20% LM10 -
N° de stock RS 173-0780
MarqueRS PRO
98,514 €
Each (In a Box of 5)
Unité
10kΩ Linear - - Spring Return - - Linear - Conductive Plastic - ±20% WT22 -
N° de stock RS 170-5317
MarqueRS PRO
26,054 €
Each (In a Box of 100)
Unité
2.5kΩ Linear 1 4 Panel Mount 1.5W 6.35 mm Linear - - Solder Lug ±10% CLR4000 -
N° de stock RS 842-7208
MarqueRS PRO
174,17 €
Each
Unité
10kΩ Linear - 1 Spring Return - - Linear - Conductive Plastic - ±20% WT22 -
N° de stock RS 842-7116
MarqueRS PRO
7,93 €
Each
Unité
5kΩ Rotary 1 1 Panel Mount 1W 6.35 mm Linear - Wirewound Solder ±20% P25 22mm
N° de stock RS 173-0740
MarqueRS PRO
1,861 €
Each (In a Box of 50)
Unité
5kΩ - 1 - Panel Mount 3W 6.35 mm - - Wirewound Solder ±10% P40 68mm
N° de stock RS 173-0738
MarqueRS PRO
1,861 €
Each (In a Box of 50)
Unité
10kΩ - 1 - Panel Mount 3W 6.35 mm - - Wirewound Solder ±10% P40 68mm
N° de stock RS 173-0778
MarqueRS PRO
88,316 €
Each (In a Box of 5)
Unité
5kΩ Linear - - Spring Return - - Linear - Conductive Plastic - ±20% WT22 -
N° de stock RS 173-0759
MarqueRS PRO
4,263 €
Each (In a Box of 50)
Unité
5kΩ - 1 - Panel Mount 1W 6.35 mm - - Wirewound Solder ±20% P25 22mm
N° de stock RS 842-7201
MarqueRS PRO
162,61 €
Each
Unité
5kΩ Linear - 1 Spring Return - - Linear - Conductive Plastic - ±20% WT22 -
N° de stock RS 842-7100
MarqueRS PRO
18,48 €
Each
Unité
5kΩ Rotary 1 1 Panel Mount 3W 6.35 mm Linear - Wirewound Solder ±10% P40 68mm
N° de stock RS 842-7090
MarqueRS PRO
18,48 €
Each
Unité
10kΩ Rotary 1 1 Panel Mount 3W 6.35 mm Linear - Wirewound Solder ±10% P40 68mm
N° de stock RS 170-5318
MarqueRS PRO
26,054 €
Each (In a Box of 100)
Unité
5kΩ Linear 1 4 Panel Mount 1.5W 6.35 mm Linear - - Solder Lug ±10% CLR4000 -
N° de stock RS 173-0777
MarqueRS PRO
82,198 €
Each (In a Box of 5)
Unité
5kΩ Linear - - Spring Return - - Linear - Conductive Plastic - ±20% WT22 -
N° de stock RS 173-0772
MarqueRS PRO
67,934 €
Each (In a Box of 5)
Unité
10kΩ Linear - - - - 4 mm Linear - Conductive Plastic Solder Tab ±30% 149618 28mm
N° de stock RS 842-7107
MarqueRS PRO
7,93 €
Each
Unité
2kΩ Rotary 1 1 Panel Mount 1W 6.35 mm Linear - Wirewound Solder ±10% P25 25mm
N° de stock RS 173-0758
MarqueRS PRO
4,263 €
Each (In a Box of 50)
Unité
2kΩ - 1 - Panel Mount 1W 6.35 mm - - Wirewound Solder ±10% P25 25mm
N° de stock RS 842-7122
MarqueRS PRO
7,96 €
Each
Unité
1kΩ Rotary 1 1 Bushing Mount 1W 6.35 mm Linear - Conductive Plastic Solder ±20% NP22 25mm
N° de stock RS 173-0773
MarqueRS PRO
64,698 €
Each (In a Box of 5)
Unité
10kΩ Linear - - - - 4 mm Linear - Conductive Plastic Solder Tab ±30% 149618 28mm