NECS
FAQ
How does the RMA detect touch or input?
The RMA uses electromagnetic induction. When external interaction changes the gap between the magnets, the magnetic flux through the coil changes, inducing a voltage. By analyzing the waveform of this induced-voltage signal, the RMA determines whether a touch or input event has occurred.
How is RMA input detection different from capacitive touch sensors?
Capacitive touch sensors can identify the contact position of a finger, whereas RMA input detection is based on sensing physical displacement. Sensitivity can be tuned in software; however, a single actuator has limitations in determining the exact X–Y coordinate of a press. That said, by placing the actuator at a point in the mechanical structure where surface displacement is greatest and applying optimal sensitivity tuning, localized input functions for specific areas can be implemented effectively without full coordinate tracking.
Is it possible to provide haptics and sound simultaneously?
Low-frequency components can be used for haptic vibration, while mid-to-high frequency components can be used for audio output.
With a DSP-enabled driver (Digital Signal Processor), the two signals can be mixed and controlled appropriately.
Is haptic vibration possible on any surface?
Haptic vibration is most effectively transmitted when the surface touched by the user can move.
If the panel is too heavy, overly rigid, or rigidly fixed at multiple points so that it barely moves, the haptic feedback at the fingertips will be weak or imperceptible, even if the actuator generates vibration.
For optimal haptic sensation, we recommend a suspension or compliant mounting structure that allows panel movement.
What are the voltage limits by signal type?
Based on the AC/PC-160-064 model
| Continuous Sine-Wave Operation | General Music/Audio Playback | Haptic Drive | |
|---|---|---|---|
Allowable Input Power | 4W | 8W | Since haptic pulses are generally very short, a high instantaneous peak power may be allowed in haptic use cases. However, mechanical and thermal limits must be considered. |
Voltage Limit | 4.8 Vms | 6.8 Vms | 8~10 Vpeak |