Coocoo Clock Mechanism With Custom Figurines

This is a working mechanism for a coocoo clock. Step motor drives the hour and minutes axis as well as figurines. On each full hour one of the figures is driven outside by a servomotor. In the original project the figurines were birds and a true sound of each bird was played. 

You will additionally need:

• MG995 servo or similar
• 28BYJ-4828BYJ-48 step motor or similar
• 2x 602-2RS bearings or similar
• 4x 625ZZ bearings  or similar
• Electronic circuit to drive the step and servo motor. I will release the schematic in later time. I used:
  • TMC2209 stepstick - for driving step motor
  • DFPlayer mini fz1281 - for playing sounds
  • Magnetic encoder dev board - AS5600
• Software to drive it. I will post it to github or sth.

Some tips and tricks:

• Birds pointers are quite hard to assemble to the birds gear. You need to drive a nail as an axis to the bottom of the bird pointer, cut the nail to exact length and then push the nail with pointer into the birds gear socket. Repeat x12.
• Birds pointers are returned to position by a rubber band.
• To read the feedback position with magnetic encoder you need to glue a magnet to the end of feedback gear axis

Optionals:

• There is a feedback gear in and out models. The feedback system is used to be able to determine where is the clock after a power loss and to detect lost steps. It is not strictly necessary, but recommended.