A mechanical wind-up metronome working

A mechanical wind-up metronome working - in motion with different beats per minute selections.
From Wikipedia: A metronome is any device that produces regular, metrical ticks (beats, clicks) - settable in beats per minute. These ticks represent a fixed, regular aural pulse; some metronomes also include synchronized visual motion (e.g. pendulum-swing). The metronome dates from the early 19th century, where it was patented by Johann Maelzel in 1815 as a tool for musicians, under the title "Instrument/Machine for the Improvement of all Musical Performance, called Metronome".

[@prithwin]

how long does it take to noticably lose tempo?

[@rizel1045]

I super like this!

[@oswaldothomas627]

Wow this is cool. I enjoyed watching it.

[@magicphysicsdude]

Hey, this is the same metronome on the wikipedia page for metronomes!

[@DwayneHicks426]

good for meditation. (no kidding)

[@Pablo-rq8ec]

Sounds like a clock...