Build an Arduino Mega–Driven Liquid Metal Soft Gripper That Adapts to Any Object

Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.

Imagine a robotic gripper that can hold a raw egg without cracking it, then lift a metal part with equal certainty — all by changing the stiffness of its fingers on the fly. This kit lets you construct exactly that: a three-fingered soft gripper where each silicone digit contains a channel of Galinstan liquid metal. Three syringe pumps, driven by stepper motors under Arduino Mega control, push the gallium-based fluid in and out to alter the finger rigidity. Force-sensing resistors and pressure sensors feed back in real time, so your gripper learns to modulate its grasp for any shape or fragility. It’s the same principle used in research labs for surgical assistants and food handling, now in a hands-on build for the seriously curious maker.

What You'll Build

You’ll fabricate a compliant, three-finger gripper from silicone, each finger embedded with a Galinstan-filled channel connected via PTFE tubing to a 10mL syringe pump. The Arduino Mega orchestrates A4988 drivers to control the stepper motors, while FSR 402 sensors on the fingertips and MPX5010 pressure transducers in the fluid lines monitor grasping force and channel pressure. The 0.96-inch OLED displays status, and an SD card logs data. By tuning the PID loops in the provided code, you’ll achieve a closed-loop system that adapts the gripper’s stiffness in milliseconds — ideal for handling objects as varied as berries, circuit boards, or glassware.

What You'll Learn

• Design and cast soft robotic actuators with embedded fluid channels
• Implement closed-loop control of liquid metal stiffness using pressure and force feedback
• Program Arduino Mega for multi-axis stepper motor coordination and sensor fusion
• Log and visualise real-time sensor data for iterative tuning of grasping algorithms

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

This kit is built for advanced electronics enthusiasts, researchers, and engineering students who want to move beyond rigid robotics. It’s particularly relevant for B.Tech and M.Tech candidates in ECE, mechatronics, or robotics at institutions like IITs, NITs, VIT, or BITS Pilani working on final-year projects or Smart India Hackathon submissions. If you're comfortable with Arduino, soldering, and basic PID control, and you’re ready to explore the frontier of soft actuators, this project will give you a tangible outcome that stands out in labs and interviews alike.

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.

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.