DIY Robotic Arm Mechanic Kit 4DOF – Acrylic Robot Arm for Students
DIY Robotic Arm Mechanic Kit 4DOF – Acrylic Robot Arm for Students
This DIY 4DOF acrylic robotic arm mechanic kit provides a laser-cut acrylic structure for building a functional robotic arm, compatible with Arduino, ESP32, and Raspberry Pi for student projects and maker learning.
Key Specifications
| Material | Acrylic (laser-cut) | High |
| Degrees of Freedom | 4 (base, shoulder, elbow, gripper) | High |
| Gripper Type | Mechanical claw, included | High |
| Servo Requirement | 4x standard servos (e.g., MG996R) – not included | Medium |
| Assembled Weight | ~350 g (without servos) | Low |
| Assembled Dimensions | Approx. 25 cm × 15 cm × 40 cm | Low |
| Assembly | Screwdriver required; nuts & bolts included | High |
| Control Compatibility | 5V PWM signals via Arduino, ESP32, Raspberry Pi | High |
What You Can Build With This
- Pick-and-Place Station: Arduino Uno drives four servos to move small objects from one tray to another using the Servo library.
- IoT-Controlled Arm: ESP32 hosts a web server that lets you control the arm remotely via Wi‑Fi from a phone or browser.
- Object Sorter: Raspberry Pi with camera runs OpenCV to detect colours and positions the arm to sort items by colour.
- CBSE Class 12 Practical: Demonstrates kinematics and torque using robotic arm motion, ideal for physics investigatory projects or ATL Tinkering Labs.
- Smart India Hackathon Prototype: Build an AI‑powered waste segregation arm that picks and places items based on material recognition.
Compatibility
| Platform | Compatible | Connection | Library / Method |
|---|---|---|---|
| Arduino Uno R3 | Yes | Digital pins 9,10,11,5 (PWM) | Servo |
| Arduino Nano | Yes | D3,D5,D6,D9 (PWM) | Servo |
| Arduino Mega 2560 | Yes | PWM pins 2-13 | Servo |
| ESP8266 NodeMCU | Yes | GPIOs with PWM (D0-D8) | Servo (or analogWrite) |
| ESP32 Dev Board | Yes | Any GPIO (use 4 channels) | ESP32Servo |
| Raspberry Pi Pico | Yes | GP0-GP3 (PWM) | Servo or Pico-SDK PWM |
| Raspberry Pi 4 / 5 | Yes with condition | GPIO + external 5V power | pigpio (for stable PWM) |
Wiring and Interface Notes
Connect each servo’s signal wire to a PWM‑capable pin on your board and power all servos from an external 5V 2A supply; never draw servo current from the board’s 5V pin. Ensure a common ground between the microcontroller and the external power source to avoid erratic behaviour. For Raspberry Pi, we strongly recommend a PCA9685 servo driver board connected via I2C if you need jitter‑free control, or use the pigpio library.
Frequently Asked Questions
Are the servo motors included in the kit?
No, this kit contains only the mechanical acrylic parts, screws, and nuts. You must purchase four standard servos (MG996R or SG90) separately.
How much weight can the arm lift?
With typical hobby servos, the arm can lift 100–150 g. For heavier payloads, upgrade to high‑torque metal‑gear servos and reinforce the base.
What you can build with this
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items