2R Robotic Arm | Simple Arduino Robotic Arm

A simple 2R robotic arm designed to hold a marker and draw on a whiteboard. The setup mounts using suction cups for easy attachment and stability. It includes a dedicated Arduino holder and two 18650 battery holders (2 cells each) for a clean, self-contained build. the end effector can be replaced as it is a separate part

Motors Used:

2 × Pro-Range OT5330M 7.4V 35Kg·cm 180° Metal Gear Digital Servo Motors

1 × RDS3115MG Digital Metal Gear Dual Shaft 15Kg·cm 180° Servo Motor

Bearings:

8 mm inner diameter bearings used at key joints for smooth motion

Fasteners:

M3 nuts and bolts

Original screws included with the servo motors

Use Case:
Perfect for demonstrations, drawing, or educational projects — just print, assemble, and mount on any whiteboard to start drawing with a marker.