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Advanced Haptic Motor Driver Module for High Fidelity Linear Resonant Actuator Control
Gravity Haptic Motor Driver for LRA motors is a dedicated control module designed to generate precise and consistent tactile feedback using Linear Resonant Actuators. Powered by the TM6605 haptic driver chip it converts simple I2C control commands into refined vibration effects enabling rich user interaction without complex motor tuning.
The driver operates across a wide supply range from 3.7V to 5.2V and supports LRA operating frequencies between 140Hz and 220Hz. With automatic resonance tracking it continuously adapts to the connected actuator to maintain optimal vibration strength and efficiency. An onboard library of forty four built in vibration modes combined with the Gravity plug and play interface makes this module ideal for robotics interactive controllers wearables and smart user interfaces.
Key Features
- Dedicated LRA Haptic Driver
Specifically engineered for Linear Resonant Actuators with stable output
- Rich Built In Vibration Library
Includes forty four predefined vibration patterns for varied tactile feedback
- Automatic Resonance Tracking
Continuously tunes output frequency for optimal LRA performance
- Simple I2C Control Interface
Enables easy control from microcontrollers without complex configuration
- Gravity Plug And Play Design
Simplifies integration with Arduino ESP32 and other development platforms
Figure: Wiring Diagram of Gravity: Haptic Motor Driver and Arduino
Rich Haptic Library with 44 Built-in Modes
The module is pre-loaded with 44 different, pre-programmed vibration patterns. This large library enables the instant development of various tactile effects—ranging from subtle clicks to powerful rumbles—via simple I2C commands. This feature dramatically speeds up development and eliminates the need for manual waveform programming, allowing designers to focus on the user experience.
Figure: Vibration mode of Gravity: Haptic Motor Driver
Automatic Resonance Tracking
A significant problem with LRA motors is their limited and accurate resonance frequency. This driver module includes automated resonance tracking, which intelligently determines and locks onto the LRA's ideal frequency. This auto-calibration ensures that the motor continually provides the highest vibration strength and crispest feedback possible, without the need for sophisticated manual tweaking or calibration methods.
Plug-and-Play Gravity I2C Integration
The driver is designed for optimal ease of use and uses the standard Gravity I2C interface to connect to a broad range of microcontrollers such as Arduino, Raspberry Pi, and UNIHIKER. The package comes with a compatible LRA motor and a Gravity sensor cable, making it a full, ready-to-use solution. This arrangement allows developers to go from unboxing to a working haptic prototype in minutes.
Applications
- Immersive Game Controllers: Enable realistic rumble and feedback for actions, impacts, and in-game events.
- Interactive Robotics: Provide physical confirmation of robot activities, button presses, and user interactions.
- VR/AR Haptics: Enhance virtual experiences with physical feedback gloves or controllers.
- Notification Systems: Develop silent, wearable alert devices that use distinct vibration patterns for different notifications.
Package Includes:
- Gravity: Haptic Motor Driverx1
- Gravity 4pin sensor cablex1
- LRA motorx1
