Motor Position Encoder Kit — Build a Variable Impedance Actuator with Arduino Mega for Safe Human-Robot Interaction

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

Emulating a physical spring with adjustable stiffness, this kit lets you explore how robots can safely collaborate with humans by adapting resistance in real time. Whether for rehabilitation robotics, exoskeletons, or industrial cobots, the principles learned are foundational to compliant motion control. No more rigid, unsafe joints — build a system that yields when it should, using co-located DC motors, force sensors, and precise encoders all driven by an Arduino Mega.

What You'll Build

You’ll assemble a dual-motor actuator where two DC motors work in opposition to create a virtual spring with software-tunable stiffness. Force-sensitive resistors (FSR 402) directly measure the interaction force at the output, while AS5600 magnetic encoders track angular position with 12-bit resolution. The 0.96-inch OLED displays real-time force, angle, and stiffness values, and the dual INA219 current sensors provide torque estimation for closed-loop variable impedance control.

What You'll Learn

• Implementing position and force feedback loops on the Arduino Mega with L298N motor drivers
• Calibrating and using AS5600 magnetic encoders and FSR 402 force sensors for precision motion
• Designing variable impedance algorithms — from static stiffness to dynamic damping — for safe human interaction
• Soldering and assembling a multi-board prototype with stable power distribution using the LM2596 buck converter

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

Designed for advanced undergraduates, postgraduates, and engineers working on compliant robotics. It suits B.Tech/M.Tech students in mechatronics, ECE, or mechanical engineering at institutions like IIT, NIT, VIT, and BITS Pilani, where courses on robot control demand hands-on force/impedance experiments. Smart India Hackathon teams building assistive exoskeletons or rehabilitation devices will find it immediately applicable, and industry R&D engineers can use it to prototype safe cobot joints.

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.