10k Ohm Linear Potentiometer

A 10k Ohm Linear Potentiometer is a three-terminal variable resistor widely used in electronics to manually adjust voltage levels, calibrate circuits, or provide user input (such as knobs or dials).

Key Features & Specifications

• Resistance Value: $10\text{ k}\Omega$ (10,000 ohms total resistance across the track).

• Electrical Taper: Linear (B-taper) — meaning the resistance changes in direct proportion to the physical rotation or movement of the shaft, ensuring a uniform voltage divider output.

• Pin Configuration: Typically features 3 terminals:

  • Outer Pins: Connected across the fixed resistive element (e.g., connected between $3.3\text{V}/5\text{V}$ and Ground).

  • Center Pin (Wiper): Delivers the variable output voltage that changes as the shaft is turned.

• Mounting Options: Available in rotary panel-mount styles (with a threaded bushing and nut for project enclosures) or PCB/breadboard-friendly trimmer (preset) styles.

• Power Rating: Typically ranges from $0.05\text{W}$ to $0.25\text{W}$ for standard carbon or conductive plastic film types.

Common Applications

• Microcontroller Inputs: Providing analog control signals to ADCs (Analog-to-Digital Converters) on development boards like the STM32 or Arduino.

• Voltage Dividers: Creating adjustable reference voltages for sensor circuits or operational amplifiers.

• Calibration: Trimmer potentiometers are often used for “set-and-forget” circuit adjustments during prototyping.

Usage Tips

• Linear vs. Logarithmic: Ensure you use a Linear (B) taper for electronics and microcontroller control. Logarithmic (A) tapers are built for audio volume control and will feel nonlinear when read by an ADC.

• Pull-down stability: When wiring it as a voltage divider, always connect the outer pins to your power rail and ground, and route the center wiper directly to your microcontroller’s analog pin.