Materials Used

 Physical Structure
1.  Plexiglass Discs:
   - Thickness: 5 cm
   - Diameter:

     - Disc 1: 30 cm
     - Disc 2: 29 cm
     - Disc 3: 24 cm
     - Disc 4: 22 cm
   - Cutting Method: Used a laser cutter for optimal precision.

2. Metal Rod:
   - Used to join the discs together and maintain the structure.

3. Yarn:
   - Wrapped around the rod and discs to prevent the cat from getting hurt and to provide a scratching surface.

4. Soft Fabric:
   - Used to cover the top disc to provide a consistent texture.

Electronic Components
1. Tilt Sensor:
   - Cylinder containing a ball that emits a signal when the ball touches the wall.

2. Colored LEDs:
   - Used to create light effects when the tilt sensor is activated

3. Resistors:

   - Integrated into the circuit to limit the current.

4. Battery:
   - Power source for the ball's electronic circuit.

5. Buzzer:
   - Emits a sound when the infrared sensor detects movement.

6. Infrared Sensor:
   - Detects the cat's movements.

7. Arduino Board:
   - Controls the buzzer and manages signals from the infrared sensor

8. Camouflage Box:

   - Hides the Arduino board with a hole for the infrared sensor.

Design and Assembly

Disc Structure
1. Cutting the Discs:
   - Cut the plexiglass discs to the specified diameters using a laser cutter.

2. Assembling the Discs:
   - Insert the metal rod through the center of the discs.
   - Stack the discs evenly spaced.

3. Securing the Rod:
   - The rod runs through all the discs and is firmly fixed to the top and bottom discs to stabilize the structure.

4. Wrapping the Yarn:
   - Wrap the yarn around the rod and discs to make them safe and appealing for the cat.

5. Covering the Top Disc :
   - Cover the top disc with soft fabric for a smooth texture.

 Electronic System

 Circuit Diagram

+------------------+
|  Battery         |
|   +---+          |
|       |          |
|       +------> LED ------> Resistor ------> Tilt Sensor ------> Battery - |
+------------------+
 Assembling the Light-Up Ball

1. Electronic Circuit:
   - Connect the LED, resistor, and tilt sensor in series.
   - Embed the circuit in a transparent ball.

2. Attaching the Ball:
   - Attach the ball with yarn and hang it on the tree.

 Detection and Sound System
1.  Infrared Sensor and Buzzer:
   - Connect the infrared sensor to the Arduino board.
   - Program the Arduino board to activate the buzzer when movement is detected.

2. Integration into the Tree:
   - Hide the Arduino board in a camouflage box under the tree.
   - Make a hole so only the infrared sensor is visible.

3. Programming the Arduino:
   - Load simple code to detect movement and activate the buzzer.