I have had an idea for an array of extremely small pneumatic valves for a long time now.
Every time I look, piezo benders seem to be cost prohibitive.
If I need 8 per valve and the benders cost more than I can charge for the valve, I forget about it for a while again.
Long ago I heard that you can buy broken sheets or scraps for next to nothing.
Can I make a bender by cutting a speaker into strips?
Am I missing something?
Where can I buy a few small benders that will move 0.007" or more?