I was trying to make a device to demonstrate mechanical resonance

[@philandeswilliams1975]

😎👍🏿Looks like tiny pumping action performing some work.👍🏿👍🏿

[@jurij0001_rus]

Buddy, you can make a frequency meter out of it)))

[@eeknooza]

👏👏👏

[@eeknooza]

This is a easy-to-make device