Bending Piezo Actuator
I’ve been playing around with these Piezo actuators which come from pantpiezo (model number QDTE52-7.0-0.77-1). Bendable Piezo actuators offer deflection in the millimeter range at low force. The ones I have appear to be bimorphic so you need to apply an opposite voltage to each side. The video below is with a 100v supply, current draw seems to be < 1mA. From my reading of the specs they should be able to produce a deflection of ~1.2mm with a 200v drive voltage. However even with the 100v used below you can still clearly see the deflection:
Here a link to the part: here
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