I picked up some electromagnetic actuators called flexAR, and with the help of an h-bridge to reverse polarity at specific frequencies, I’ve got this bad boy flapping when exposed to a magnetic field. From here I’m wanting to explore generating haptic signals from wearables, and figure out a membrane that would be best for basic tone generation. If anyone is interested in a parts list, schematic, or some code let me know and I’ll post it. Here’s a vid with info on the actuator from the guy who developed them.
And here it is in all it’s flappy glory
Warning: Anything over 0.2 amps supplied to the flexAR seems to just be expressed as heat, which transfers to the magnet. I burned myself on the initial test at 0.5 amps, as the coil reached 250°f (120°c) in an instant. I recorded a max temp of 320°f (160°c) at 0.9 amps before deciding I’d rather not melt anything.