A simplified version of the SmartKnob haptic interface has been designed to make assembly easier for beginners. The redesign moves the circular LCD display from inside the knob to a separate breakout board, eliminating the need for motors with hollow shafts and expanding motor compatibility. The new design features a modular motor carrier board with multiple mounting holes and connector types, easier-to-solder PCB components, and replaces the original LILYGO T-micro32 Plus MCU with a cheaper, more accessible ESP32. The SmartKnob uses a BLDC motor with field-oriented control to provide programmable haptic feedback, allowing it to simulate different physical behaviors like detents, spring returns, or free rotation.
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