A small vibration can make a button feel more responsive, particularly when the user is not watching a screen. This module turns a simple electrical trigger into a brief tactile response.

Connect VDD and GND, then trigger a falling edge on EN. The vibration motor runs momentarily, allowing one button or several buttons to provide feedback without the host generating the motor pulse itself.

The 3mm mounting hole is part of the practical design: fixing the module to an enclosure helps transmit the vibration to the user's hand. The enclosure and mounting therefore matter alongside the electrical connection.

Documentation: https://www.questwiseventures.com/products/haptic-feedback-module-for-ui-buttons