ESP32 Elbow Exoskeleton Kit: Torque-Controlled Servo Rehab System
ESP32 Elbow Exoskeleton Kit: Torque-Controlled Servo Rehab System
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Restore elbow mobility for patients recovering from stroke or neurological injury with a wearable exoskeleton that uses real-time torque sensing to assist flexion safely. This project brings together ESP32 control, high-torque MG996R servos, and force-sensing resistors to create a precision rehabilitation device you can build and program yourself.
What You'll Build
A fully wearable elbow brace powered by two MG996R servos that gently assists bending based on force readings from FSR sensors placed on the forearm and upper arm. The system detects patient effort and delivers proportional servo torque, while ACS712 current sensors enforce safety limits to prevent injury. The result is a responsive, mechatronic aid for physiotherapy exercises and range-of-motion training.
What You'll Learn
- Implement closed-loop torque control with servo motors and real-time current feedback
- Interface force-sensing resistors (FSR 402) with ESP32 for human-robot interaction
- Design safety limits in motor drivers using ACS712 current sensors to enforce torque thresholds
- Integrate MPU6050 IMU for joint angle measurement and movement tracking
Kit Contents
| Component | Quantity |
|---|---|
| ESP32 Dev Board | 1 |
| MG996R Servo | 2 |
| PCA9685 Driver | 1 |
| FSR 402 | 2 |
| ACS712 5A | 2 |
| MPU6050 | 1 |
| LM2596 Buck Converter | 1 |
| 7.4V LiPo 2000mAh | 1 |
| XT60 Connector | 1 |
| 100nF Caps | 15 |
| PCB Prototype Board | 3 |
| 3D Printed Brace | 1 |
| Velcro Straps | 4 |
| Soldering Iron | 1 |
| Solder Wire | 1 |
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
Physiotherapy researchers and biomedical engineering students prototyping assistive devices for stroke rehabilitation. B.Tech ECE/EEE final-year candidates tackling Smart India Hackathon medical device tracks, ATL mentors designing wearable healthcare projects, and professionals in IIT/NIT/VIT labs building controlled human-machine interfaces will find this kit a robust foundation.
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?
Open the AI companion through the QR code, describe the issue, and get step-by-step debugging. You can also message us on WhatsApp for human support within a few hours.
How does the torque safety limit work?
ACS712 current sensors continuously monitor servo current draw. The ESP32 compares this to a preset threshold and cuts PWM if torque exceeds safe ranges, protecting both the patient and the motors.
Is the exoskeleton safe for actual patient use?
The kit is a prototyping platform for research and educational demonstration. With proper calibration and the implemented hard torque limits, it provides a safe starting point for clinical studies under professional supervision.
Do I need a 3D printer for the brace?
No - the kit includes a 3D-printed brace ready to wear. You only need to attach the servos and sensor pads using the included Velcro straps and basic assembly tools.
Two MG996R servos with torque sensing assist elbow flexion in patients. Safety torque limits enforced.
What's in this kit
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.
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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