Step 1: Project Definition

• Theme selection: creation of an automated level crossing.

• Objective definition: raising and lowering barriers using servomotors controlled by an Arduino.

Step 2: Mechanical Design

• Design of mechanical parts (barriers, racks, Arduino box, support).

• 3D modeling of gears and racks.

• Preparation of files for 3D printing and laser cutting.

Step 3: Fabrication

• Laser cutting of wooden parts: base, box, supports.

• 3D printing of gears and rack mechanisms.

• Sanding of the printed parts to ensure the rack slides smoothly in its base.

Step 4: Assembly

• Mounting the servomotors to the base.

• Assembling the rack and pinion mechanisms.

• Assembling the Arduino box using interlocking parts (without glue).

• Inserting the Arduino into the wooden box.

Step 5: Wiring

• Connecting the servomotors to the Arduino using a breadboard and jumper wires.

• Neatly routing the cables through a hole in the box.

Step 6: Programming

• Writing a simple Arduino code to control the servos (from 0° to 180°).

• Manual simulation of a train detection: opening/closing the barriers via code.

Step 7: Testing and Adjustments

• Testing the sliding mechanism of the racks.

• Adjusting the servo angles to achieve smooth movement.

• Verifying the overall stability of the complete system.