I don't quite understand how the strikers work. Is there something magnetic attached to the top of the wood dowel?
So, the electromagnet ‘pulls’ the piece of steel into its inner cavity.
The wooden stick and bead seems to be arranged and mounted in a way that gravity will ‘pull’ the piece of steel away from the solenoid.
I think the solenoids are only strong enough to ‘swing’ the stick and bead toward the tube, but not hold it in place for a sustained period.
[update]
Totally wrong. Seems to be the opposite. The solenoid sucks in the piece of steel, moving the stick and bead away from the tube, but normally, at rest, the bead rests against the tube, because of the hinge and gravity.
The electromagnet is pulsed to control how hard to strike.
There's a little plastic hinge that goes on the end of the dowel / slots into the hanger. I don't have a picture, but the file is here: https://github.com/keredson/chimes/blob/main/striker_hinge.s...
Two tangential complaints.
First, it sounds to me like the ninth note is off - it's lower than it should be.
Second, that page ate a huge chunk of my monthly mobile data allocation.
Twice. Because I made the mistake of clicking the image for the video, instead of opening it in a new tab. The page reloaded in full on the back button.
I can't believe you soldered directly to the ESP though! Seeing that gave me anxiety, haha.