Universal Knob Controller: A Customizable Control for Modern Devices
Date: February 8, 2023

Universal Knob Controller: A Customizable Control for Modern Devices

This project is about creating a high-tech, modular knob that can be programmed for different functions. It features a small circular display, haptic feedback (vibration for touch), and a push-and-turn motion. The added haptic feedback makes it more intuitive and accessible, offering tactile cues that improve usability for everyone, including those who rely on touch. This versatile knob is perfect for use in home gadgets, industrial machines, and IoT devices.

Technical Details:

The programmable knob integrates cutting-edge hardware and software:

  • Push-Rotate Mechanism: Supports push, rotate, or combined actions for versatile control.
  • Circular Display: A built-in graphical display provides visual feedback, settings, or instructions.
  • Haptic Feedback via Embedded DC Motor: Adds a tactile layer to simulate clicks, guide interactions, and enhance accessibility.
  • Custom PCB Design: Handles power management, motor control, display communication, and connectivity with external systems.
  • Firmware Customization: Enables developers to program specific functions for push, rotate, and feedback, adapting the knob to different applications.

Challenge Solved:

The main challenge was creating a compact yet feature-rich design that integrates precise motor control, a graphical display, and input sensing while minimizing power consumption. Adding haptics for accessibility required balancing complexity with usability. Achieving seamless hardware-software integration took multiple refinements to ensure flexibility and reliability.

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