Four Degree Arduino Robotic Arm

This project demonstrates how basic materials and microcontroller technology can be combined to create a functional robotic system. By programming the servos through Arduino, the arm can perform controlled movements such as lifting or grabbing objects.

Usefulness & Significance:

1. Hands-on robotics learning: Helps understand core robotics concepts like actuators, mechanical linkages, and microcontroller control.
2. Engineering design practice: Shows how structural design, electronics, and programming work together in a single system.
3. Real-world applications: Similar robotic arms are used in manufacturing, medical robotics, and automation to perform precise or repetitive tasks.
4. Low-cost prototyping: Demonstrates that functional robotics prototypes can be built with inexpensive materials before developing more advanced versions.

These are the supplies needed for this project!

How to View and Simulate the Circuit in Tinkercad

1. Go to Tinkercad in your web browser.
2. Click Sign Up and create an account using your Google account (or sign in if you already have one).
3. Once logged in, click “Circuits” and select “Create New Circuit.”
4. Add the required components to your workspace, including an Arduino Uno, a breadboard, servo motors, potentiometers, wires, and resistors.
5. Connect the components following the wiring layout shown in the circuit diagram (servos connected to the Arduino digital pins and potentiometers to the analog pins through the breadboard).

Link: https://www.tinkercad.com/things/7TGcFObdA3y-copy-of-4-potentiometer-servo-motor

After simulating the circuit in Tinkercad, begin building the physical version of the system using your real components. Then, connect the Arduino to your laptop using the blue wire!

Make a base with the popsicle sticks: 7x2 sticks horizontally on the bottom, and 6x4 vertically standing on top. Secure these together with hot glue!

Set Position of motor 1 to 90 degrees, then attach the 4 edge white piece

Glue motor 2 to the motor 1 white piece. Set motor 2 to the 90 degree position then attach the white piece.

Glue motor 3 to the motor 2 white piece. Set motor 3 to the 90 degree position then attach the white piece.

Glue motor 4 to the motor 3 white piece. Set motor 4 to the 90 degree position then attach the white piece. Glue a popsicle stick on the motor 4 white piece.

How to Download the Arduino IDE

1. Go to the official Arduino IDE download page on the Arduino website.
2. Select the version that matches your operating system (Windows, macOS, or Linux).
3. Click Download and choose “Just Download” if prompted to donate.
4. Open the downloaded installer file and follow the setup instructions to install the IDE on your computer.
5. After installation, connect your Arduino Uno to your computer using a USB cable.
6. Open the Arduino IDE, select Tools → Board → Arduino Uno, and choose the correct COM port under Tools → Port.
7. You can now upload the code for your robotic arm!

After typing the code onto Arduino IDE, press upload (the red circle), and run it!

Now that you have made the circuit connected with the Uno Arduino board, assembled your arm, and uploaded the code into it:

Rotate the buttons on your breadboard, and the motors should move accordingly! (one button for each motor)

I chose to build this Arduino robotic arm because it combines mechanical design, electronics, and programming in a hands-on way. It allowed me to design a functional robotic system using simple materials like popsicle sticks while learning how microcontrollers control motors and physical movement. The project is a practical introduction to robotics and automation.

What It Represents

This project represents the core ideas behind modern robotics:

1. Automation and control systems
2. Integration of hardware and software
3. Problem-solving and engineering design

Even though the structure is simple, the same principles are used in industrial robots, surgical robots, and automated manufacturing systems.

Why It Is Useful

1. Demonstrates real robotic arm mechanics such as joints, rotation, and gripping.
2. Teaches electronics and programming using an Arduino Uno.
3. Encourages prototyping—engineers often start with simple models before building advanced systems.
4. Relates to real-world automation, where robotic arms are used for assembly, packaging, and precise tasks.