To create the hammer action, we'll need to build a lightweight, yet sturdy hammer -- a perfect time to use corrugated cardboard! The hammer will have a pivot running through its handle so that the motor-driven striker can whack the back of the handle, raising up the hammer. Gravity will cause it to drop back down.
Since the TT motor doesn't have a huge amount of torque, we need to help it along so that it doesn't stall out. That's what the slinky rainbow spring is for! We'll use it to assist with raising the hammer, plus it's highly adjustable, and looks awesome!!
The striker assembly is made with a gearbox motor and a paddlewheel with a popsicle stick attached to it. This will strike the hammer handle once per revolution when it is spinning.
First, we'll build the striker wheel, and then attache the motor to a small box to act as a stand.
Make sure the motor wires are outside the box, then close its flaps. Depending on the style of box, you may be able to leave two flaps open to help secure the striker assembly to the putting green later.
Move the hammer stand in place and you can see how the full striker assembly will work. However, the hammer is a bit heavy for the motor, so we'll add a spring assist!