VibroShield: Cheap piezo - select a transducer

[gergelytakacs]

Find a cheap piezoceramic film transducer that can be used in (relatively) low cost shields.

• MIDÉ is way too expensive. We have the MIDÉ PPA 1021 transducers, made from PZT5A. We have two pieces, they cost over 200 EUR.
• What alternatives do we have? There are a lot of manufacturers for piezos, a good search is needed.
• Any Chinese manufacturers?
• How about the cheap PVDF ones marketed as sensors? (For Arduinos too) They are called MEAS, such as the ones made by MEAS-SPEC.com. Has anyone used it as an actuator? Can we try it?

[gergelytakacs]

@KuboJakub Has found a potential candidate.