I've been teaching a blind student how to program and build electronics with Arduino. So far I've substituted LED's with piezo buzzers with excellent results. We are getting to the point where more complicated output is required and braille displays are excessively expensive. I've found these micro solenoids on eBay.
They are 5 volts and small enough to place on a grid to create display. Could I substitute these on a regular LED grid and run it via conventional shift register or MAX7219 methods?
Here is the link to the micro solenoids.