About Potentiometers, Trimmers & Rheostats

Potentiometers, Trimmers & Rheostats

A potentiometer, trimmer, and rheostat are all three types of resistors that are adjustable. They are used to control the electric current by varying the resistance in the circuit. A potentiometer is an adjustable three-terminal resistor with a sliding contact (wiper) that moves across a resistive element to change resistance in a circuit. They are used in audio controls, light dimmers, and other applications that require adjustable resistance in the circuit. A trimmer is a miniature version of a potentiometer, and it’s used to make fine adjustments in electronics circuits. It can be used for voltage and current adjustments, and for tuning circuits for maximum performance. A rheostat is an adjustable two-terminal rotor, and it’s used to control the current in a circuit. It’s often used to control the speed of a motor or other electrical device.
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3386H-1-504LF


500 kOhms 0.5W, 1/2W PC Pins Through Hole Trimmer Potentiometer Cermet 1.0 Turn Side Adjustment
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Bourns 230
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USD 0.6762
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6674S-1-102


Bourns Precision Potentiometers 1K 51mm 1Turn Bushing Mnt
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Bourns 37
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USD 286.2259
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3314G-1-204E


Trimmer Resistors - SMD 4mm SQ 200K
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Bourns 36
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USD 0.3626
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PDB082-P10-503A3


Potentiometers 50K 8MM MICRO ROTARY POT
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Bourns 36
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USD 0.6728
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DA-02


Trimmer; Blade:2,0x0,5mm; Blade length:150mm; Overall len:204mm
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Engineer 36
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USD 1.3759
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3310P-101-502L


5k Ohm 1 Gang Linear Panel Mount Potentiometer None 1.0 Kierros Conductive Plastic 0.25W, 1/4W PC Pins
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Bourns 36
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USD 2.116
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RD901F-40-15F-B10K-00DL1


Potentiometers 9mm Linear 10K Flat Shaft
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Alpha Taiwan 36
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USD 2.9561
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3339P-1-102


Trimmer Resistors - Through Hole 1K 5/16" Rnd 4Turn Cermet
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Bourns 36
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USD 3.979
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3059Y-1-201LF


Trimmer Resistors - Through Hole 200ohms 10% 1-1/4" PC Mount
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Bourns 25
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USD 5.888
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PTD902-2015K-A103


Bourns Potentiometers PANEL CONTROL 9MM-ST-CARBON
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Bourns 0
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USD 0.87
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