Since I’m trying to follow the original rpi-film-capture design as closely as possible, I’m adapting the original circuit as documented here.

I’m using this MakerSpot prototyping board. The photo shows the board with the A4988 stepper motor driver in position.

I drew up a wiring diagram, incorporating as much of the wiring on to board as I could. Unfortunately, the actual soldering will have to wait for another day. My trusty old Weller TC202 soldering iron (circa 1984 … ?) has apparently given up the ghost for good. Replacement parts are as expensively as a complete replacement.

I also have ordered a bunch of JST connectors that I’m hoping will work well for board-to-board connections (the green boxes on the diagram).