Organize and Share your Electronics the way you want. Sign-Up for a free account now. It takes only 30 seconds!

App note: Driving linear resonance vibration actuators

App note: Driving linear resonance vibration actuators

Linear resonance vibration actuators are great alternative to Eccentric rotating mass (ERM) motors, these are both used to vibrate handheld devices such as cellphones, driving LRAs is not the same as driving ERMs for such that LRA needs a specific resonant frequency. More on these on Precision Microdrives’ link here.

Linear Resonance Actuators (LRA) use a movable mass, permanent magnet, voice coil and spring to generate vibrations. The voice coil produces a magnetic field which interacts with the permanent magnet, causing it to move and by doing so, compresses or stretches the spring to which it is attached. The drive signal needs to alternate the direction of current (i.e. it’s an AC signal) and hence the magnetic field to make the permanent magnet oscillate back and forth with the spring. The moving mass is attached to the magnet, and it is the moving of the mass back and forth that generates the vibration.

Read more Here

 

More Articles to Read

Bookcase automatically opens to reveal secret lair
Bookcase automatically opens to reveal secret lair
PCI Express High Performance Reference Design
PCI Express High Performance Reference Design
Muxtronics open source 12V powerbank
Muxtronics open source 12V powerbank
TI’s Little Professor
TI’s Little Professor
App note: Testing inductors at application frequencies
App note: Testing inductors at application frequencies
1968 Princeton Reverb Repairs
1968 Princeton Reverb Repairs
Skill Sunday: Power Over Ethernet for Arduino
Skill Sunday: Power Over Ethernet for Arduino
More on Color TFT Displays ~ The Big Ones — 240 X 320
More on Color TFT Displays ~ The Big Ones — 240 X 320
Magnetic Rotary Encoder
Magnetic Rotary Encoder
Vertical Pole Climbing Robot
Vertical Pole Climbing Robot

Top




Shares