Gripper Arm Kit with Arduino Uno + Servos
Master Robotics: Build a 3DOF Gripper Arm with Arduino and Servos
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Take direct control of a robotic arm. With this kit, you'll wire three potentiometers to command each joint of a 3-degree-of-freedom servo arm. Twist a knob, and the corresponding shoulder, elbow, or wrist servo follows in real time. The SG90-based gripper opens and closes to pick up small objects, turning your desk into a tangible control station. No coding required for core motion—just plug, twist, and see the arm respond.
What You'll Build
A functional 3-axis robotic arm that you control with analog knobs. The base rotates, the arm reaches, and the wrist tilts—each joint moving exactly to the angle set by its dedicated potentiometer. A 4th servo drives a mechanical gripper to grasp and release light objects like bottle caps or pencil stubs.
What You'll Learn
- Analog input reading and mapping with Arduino's ADC
- Closed-loop control of multiple servos using potentiometer feedback
- Basic forward kinematics of a 3DOF arm
- Power distribution for servo arrays and noise filtering with capacitors
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | x1 |
| SG90 Servo | x3 |
| MG90S Servo | x1 |
| 10kΩ Potentiometer | x3 |
| 10kΩ Resistors | x5 |
| 100nF Caps | x5 |
| 5V 2A Power Supply | x1 |
| PCB Prototype Board | x2 |
| M-F Wires | x25 |
| M-M Wires | x15 |
Why Buy This Kit Instead of Sourcing Parts Separately
| Factor | Sourcing Separately | Compoden Kit |
|---|---|---|
| Compatibility checks | You verify every part | Pre-tested as a system |
| Build support | Forums and scattered tutorials | AI companion trained on this exact project |
| Time to first working build | Days of debugging | Hours, with step-by-step guidance |
| Shipping coordination | Multiple sellers, multiple delays | One shipment from Bengaluru in 3-5 days |
Who This Kit Is For
CBSE Class 11–12 students building sensor-based projects, B.Tech ECE/EEE students exploring embedded control in their first years, and ATL Tinkering Lab mentors who need a reliable arm for workshops. Also a fast-prototyping choice for Smart India Hackathon participants or college tech fest robo-events.
Built and Backed by Compoden
Every Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.
What if I get stuck during the build?
Scan the QR code to launch the AI companion that walks you through every wiring step. If you prefer a human touch, WhatsApp support is included.
Can I control the arm without writing any code?
Yes, the potentiometers provide direct analog control, and the pre-loaded sketch is ready to run. You can tweak it later to add features.
What objects can the gripper hold?
Lightweight items up to 30 grams, like foam balls, small erasers, or bottle caps. The SG90 gripper is designed for educational pick-and-place tasks.
Can I add more degrees of freedom later?
The Arduino Uno has spare pins and timer capacity, so you can expand with extra servos for a rotating base or wrist roll.
Three servos form a 3DOF arm with a SG90 gripper. Potentiometers control each joint in real time.
What's in this kit
- Arduino Uno R3
- SG90 Servo x3
- MG90S Servo
- 10kΩ Potentiometer x3
- 10kΩ Resistors x5
- 100nF Caps x5
- 5V 2A Power Supply
- PCB Prototype Board x2
- M-F Wires x25
- M-M Wires x15
Choose your assembly option:
- Soldering Kit — 25W soldering iron, 60/40 solder wire, flux, and small perfboard for permanent assembly.
- Breadboard Combo — 800-point full-size breadboard with 65-piece jumper wire pack for solderless prototyping.
Other projects you can build
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