Assistive Mixer Knob Adapter System

The challenge

Many audio tools lack accessible controls. This solution enables users with motor impairments to operate mixer knobs without assistance, promoting independence and inclusion in creative and professional audio work. It supports self-expression and creative

Who it helps

Individuals with limited hand dexterity—such as those with cerebral palsy, arthritis, or spinal cord injuries—who need to adjust knobs on audio equipment or similar interfaces independently. It can also benefit aging users or those recovering from injury.

How it works

Ben lacks fine motor control and finger coordination, making it hard to pinch or grip knobs. This sleeve lets him turn knobs using broad hand or arm motions. Its friction fit allows easy, independent control—no precise finger movement needed.

We designed a non-motorized sleeve that tightly fits over mixer knobs. With protruding arms, it allows rotation using a palm, knuckle, or fist. A precise friction fit ensures the knob turns with the sleeve, enabling use without fine motor control.

Tools needed

PC or MAC I7 +

Fusion 360

Prusa slicer

Measurement tool

FDM Printer

Project details

• Stage: Prototype
• Built by the TOM International Community community, Global
• Team: Ben Oxley
• Category: Daily Living, Hobbies, Fun/Leisure
• 3 downloads

The build files for Assistive Mixer Knob Adapter System are free to download from this page - open source, shared by TOM: Tikkun Olam Makers.

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