4DOF ROBOTIC ARM KIT USING ARDUINO AND SERVO MOTOR MG90S 3D print model

Design Overview:4-DOF robotic arm project — inspired by popular educational kits.

What Is It?This is a 4-degree-of-freedom robotic arm, controlled by an Arduino and powered by servo motors. The main goal of this project is to build a functional and affordable robotic arm for:

Practicing mechanical design and assembly

Learning embedded programming

Controlling real-time movement using joysticks or Bluetooth

Mechanical Design:The robot is divided into several parts:

Base Platform – This houses the Arduino, power system, and a joystick or wireless control unit. It's designed to be stable and modular.

Rotating Base Servo – Mounted vertically, this allows the entire arm to rotate left and right, just like a shoulder joint.

Lower and Upper Arm Links – These segments are connected by servo motors to allow upward and downward movement, mimicking an elbow and wrist.

Gripper Assembly – At the tip, a two-finger claw is powered by a small servo motor, allowing it to grip lightweight objects.

** Electronics and Control**The brain of the arm is an Arduino Uno, paired with a sensor shield for easy servo connections.

Control options:A joystick module for real-time manual movement

Or a Bluetooth module for wireless control via a smartphone app

The servo motors are standard SG90 or MG90S, which are widely available and perfect for low-cost applications.

** Final Words**In summary, this robotic arm project is more than just a fun build — it’s a stepping stone toward real-world robotics. Whether for learning, teaching, or product development, projects like these push us to become better engineers and creative thinkers.