Foot Pedal Potentiometer - Sewing Machine Speed Controller

A foot-operated variable resistor (potentiometer) originally designed as a sewing machine speed controller, repurposed here as a hands-free analogue input for electronics projects. The resistance changes linearly from approximately 20 kΩ (released) to 1 kΩ (fully pressed).

Terminates in a 3.5 mm audio-style connector for easy integration — connect using a terminal block adapter, in-line jack, breadboard jack, or panel-mount jack. Read the variable resistance with a microcontroller's analogue input using a voltage divider with a 10 kΩ pull-up resistor.

Key Features

• Variable Resistance – Linear change from ~20 kΩ (released) to ~1 kΩ (fully pressed)
• 3.5 mm Connector – Standard audio-style plug for easy hookup
• Sturdy Construction – Durable build quality for repeated use
• Hands-Free Control – Foot-operated for applications where hands are occupied
• Linear Response – Resistance changes proportionally with pedal travel

Specifications

• Type – Variable resistor (potentiometer)
• Resistance Range – ~1 kΩ to ~20 kΩ
• Taper – Linear
• Connector – 3.5 mm (1/8″) audio plug

Ideal For

• Variable speed motor control
• Hands-free volume or brightness adjustment
• Musical instruments and expression pedals
• Microcontroller analogue input projects

Package Contents

• 1× Foot Pedal Potentiometer with 3.5 mm cable

Resources

• Reading Resistive Sensors Guide