Assembly

• Playing Field

We began with a 24"x16" cardboard box with enough depth to prevent the pinball from falling out. Note that all cardboard shapes are created with a pair of scissors and glue.

1. Cut box to desired depth and add another piece of cardboard on top of the bottom of the board for greater rigidity.

2. Cut out holes for the flippers and find appropriate washers to place between each flipper and its corresponding hole/assembly.

Refer to https://www.thingiverse.com/thing:2718971 for details on the flippers.

3. Assemble the flippers following the guide. This will take some time. Rubber bands may be necessary to ensure the flippers return to their default position.

4. Cut out pieces of cardboard for the goals and their reinforcing walls.

5. Cut out holes for break beams and install them.

6. Make the mounts for the servos to attach to on the sides of the board with rigid material like plastic or wood, then drill and screw them onto the board.

• Servo Pillars

Create 2 equal-sized pillars with cardboard and cut holes to hole the servos. Make sure these are tall enough so the board can tilt.

• Board Pivot

Bend another large piece of cardboard into a triangular shape to support the board and pillars. Make sure this triangular pivot has enough room for the pillars and board.

Make triangular cuts into the bottom of the pillars so that they can rest on top of the triangle. Add additional cardboard to the bottom and Velcro to the triangle and pillars. This will prevent the board from sliding off and keep the pillars stable.

• Wiring

A 12V supply powers the door lock actuators that move the flippers. A 5V supply (or buck converter from 12V) powers everything else. A level shifter is necessary for the LPC4088 to communicate with the display.