1M Ohm Linear Rotary Potentiometer (1MΩ Adjustable Variable Resistor)

The 1M Ohm Linear Rotary Potentiometer (1MΩ Adjustable Variable Resistor) is a high-quality variable resistor designed to provide smooth and precise manual adjustment of voltage, current, and signal levels in a wide range of electronic circuits. With a maximum resistance of 1 Mega Ohm (1MΩ) and a linear taper, this potentiometer delivers uniform resistance changes throughout its rotation, making it ideal for applications that require accurate and predictable control.

This rotary potentiometer features a durable rotating shaft connected to an internal resistive element and a movable wiper. As the shaft is turned, the wiper moves across the resistive track, changing the output resistance or voltage according to the shaft position. Its linear response makes it particularly suitable for calibration, tuning, analog signal adjustment, sensor control, voltage division, and microcontroller-based electronics projects.

Manufactured using high-quality resistive materials and precision metal contacts, the potentiometer offers smooth operation, excellent electrical stability, low noise, and long mechanical life. The sturdy shaft is designed for easy attachment of standard control knobs, while the threaded bushing allows secure panel mounting for reliable installation in electronic equipment and control panels.

The 1M Ohm Linear Rotary Potentiometer is widely used in Arduino, ESP32, ESP8266, Raspberry Pi, STM32, audio equipment, amplifiers, power supplies, industrial control systems, robotics, automation equipment, DIY electronics, laboratory instruments, educational projects, and embedded system development. It is also commonly used for brightness control, motor speed adjustment, voltage regulation, sensor calibration, and analog input applications.

Its compact design, simple three-terminal configuration, and reliable performance make it an essential component for engineers, technicians, students, hobbyists, and electronics enthusiasts who require accurate manual control in electronic circuits.

Working Principle

The potentiometer works by varying resistance through a rotating shaft connected to a movable contact (wiper).

• A resistive track is connected between two outer terminals.

• The center terminal is connected to the movable wiper.

• Rotating the shaft moves the wiper along the resistive element.

• The resistance between the center terminal and either outer terminal changes proportionally.

• When used as a voltage divider, it provides an adjustable output voltage.

• When used as a variable resistor (rheostat), it controls current flow by varying resistance.

Because it uses a linear taper, the resistance changes evenly with shaft rotation, allowing precise and predictable adjustments.

Key Features

• Resistance value: 1MΩ (1 Mega Ohm)

• Linear taper for uniform resistance adjustment

• Smooth rotary operation

• Adjustable variable resistor

• Three-terminal design

• Durable resistive element

• High electrical stability

• Low noise operation

• Long mechanical life

• Standard rotary shaft compatible with control knobs

• Threaded bushing for secure panel mounting

• Compact and lightweight design

• Easy PCB or panel installation

• Reliable long-term performance

Applications

The 1M Ohm Linear Rotary Potentiometer is widely used in:

• Arduino projects

• ESP32 development

• ESP8266 projects

• Raspberry Pi electronics

• STM32 development boards

• Analog input circuits

• Voltage divider circuits

• Signal adjustment

• Sensor calibration

• Audio equipment

• Audio amplifiers

• Volume control circuits

• Tone control circuits

• Motor speed control

• LED brightness adjustment

• Power supply voltage adjustment

• Robotics

• Industrial automation

• Control panels

• Laboratory instruments

• Embedded systems

• Test and measurement equipment

• DIY electronics

• Educational electronics

• Electronic repair and maintenance

Specifications

• Product Type: Linear Rotary Potentiometer

• Resistance Value: 1MΩ (1 Mega Ohm)

• Taper Type: Linear

• Number of Terminals: 3

• Adjustment Method: Rotary Shaft

• Mounting Type: Panel Mount / PCB Mount (depending on model)

• Shaft Material: Metal

• Body Material: High-quality insulating plastic with metal housing

• Operating Principle: Variable resistor / Voltage divider

• Mechanical Operation: Smooth 270° rotation (varies by model)