Try measuring an the voltage in AC mode. It might not work because of the frequency response of your meter
Think of it as a fixed frequency speaker. e.g. https://www.murata.com/products/productdata/8801054523422/SPEC-PKM13EPYH4000-A0.pdf
If you need a scope, the DSO 150 is like $25.00 USD. https://www.banggood.com/Original-J...s-all-newcustom-ncv90-0623&ad_id=443948744865 It may or may not come with an AC adapter. I strapped a 9V battery holder on the back of it.
Think of it as a fixed frequency speaker. e.g. https://www.murata.com/products/productdata/8801054523422/SPEC-PKM13EPYH4000-A0.pdf
If you need a scope, the DSO 150 is like $25.00 USD. https://www.banggood.com/Original-J...s-all-newcustom-ncv90-0623&ad_id=443948744865 It may or may not come with an AC adapter. I strapped a 9V battery holder on the back of it.
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