Smart Knob for Automotive HMI

In collaboration with GLA Automotive Technology SRL, we developed smart knobs — advanced rotary controllers that represent an evolution of traditional physical controls in automotive Human-Machine Interface (HMI) design.

These controllers are a critical element in the development of "smart surfaces" within the vehicle cabin, blending the intuitive, safe operation of mechanical controls with the flexibility and personalization of modern digital interfaces.

The Mechatronic Challenge

The core challenge was integrating multiple subsystems into a compact, automotive-grade form factor: a high-resolution display, a precision haptic feedback motor, capacitive touch detection, and rotary encoding — all within strict size, weight, and thermal constraints. Each component had to work reliably under the vibration, temperature swings, and EMI conditions of a vehicle cabin.

Architecture & Protocols

The knob communicates with the vehicle's infotainment system over CAN and LIN bus protocols, standard in automotive environments. We developed custom firmware that handles real-time haptic rendering — generating configurable detent patterns, end-stops, and free-spin modes based on the active UI context. The integrated display runs independently for low-latency visual feedback.

From Concept to Functional Prototype

The project followed a structured path: initial mechanical concept and 3D modeling, custom PCB design with multi-layer boards optimized for signal integrity, firmware development with iterative tuning of the haptic response, and final integration testing on a vehicle mockup. GLA Automotive brought the automotive domain expertise; we brought the mechatronic engineering and embedded systems development.

Key features include integrated displays, haptic feedback, and multi-functionality — all designed to keep drivers focused on the road while providing rich, tactile interaction.