|You're doin' my head in
This is the final version of an automaton I made on Day 10 of 30/30, an exercise that called on me to make a different work of art on each day of April 2020. Winding the handle, right, makes the figure on the right appear to turn a big cam (end on in the centre of the picture) which operates a hammer hitting a seated figure, left.
The original version is shown below, together with video of it operating. The figure was made of card and the head was a walnut supported by a spring.