HAPTIC 2 Click is a compact add-on board that contains a linear vibration driver. This board features the LC898302AXA, a motor driver dedicated to LRA and ERM applications from ON Semiconductor. Controlled by only one pin, it allows crisp vibration thanks to automatic braking and over-driving feature and ignores the deviation of resonance frequency thanks to auto-tuning function. The original driving waveform will enable you to reduce power consumption, and it is helpful to maintain battery lifetime. This Click board™ is suitable for numerous everyday applications such as indicator systems, game consoles, training equipment/simulators with haptics function, robotics and mechatronics, and many more.
HAPTIC 2 Click is supported by a mikroSDK compliant library, which includes functions that simplify software development.
HAPTIC 2 Click as its foundation uses the LC898302AXA, a linear vibration motor driver dedicated to LRA (Linear Resonant Actuator) and ERM (Eccentric Rotating Mass) applications from ON Semiconductor. The original driving waveform enables low power consumption, and it is helpful to maintain battery lifetime. It allows crisp vibration thanks to automatic braking and over-driving feature. The drive frequency automatically adjusts to the resonance frequency of the linear vibrator without the use of other external parts.
As a result of this very effective drive, the vibration is as powerful as possible using minimal energy compared to classical solutions. It also ignores the deviation of resonance frequency thanks to auto-tuning function. This function can increase the perceived vibration force by over 20%, making it far more efficient than conventional haptic driving solutions. They require minimal power but are capable of maintaining a high level of vibration.
The LRA motors rely on a magnet attached to the case by a spring where a magnetic field from the coil causes vibration activity initiation. Compared to ERM, the LRA have better responsiveness improving system performance. The ERM type of haptic motor causes the off-balance mass to rotate. The mass movement results in an asymmetric centripetal force, leading to the motor’s displacement. Using ERM motor, ERM driving voltage can be adjusted through an adjustment resistor connected between OUT1 pin of Click board™ terminal and ERM motor pin.
HAPTIC 2 Click operates only with the PWM signal from the mikroBUS™ socket that drives the LC898302AXA and offers fully configurable drive and brake functions. Also, it has a jumper setting available labeled as MODE SEL used to choose between LRA or ERM motor to drive.
This Click board™ can be operated only with a 3.3V logic voltage level. The board must perform appropriate logic voltage level conversion before use with MCUs with different logic levels. However, the Click board™ comes equipped with a library containing functions and an example code that can be used, as a reference, for further development.
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