3-Axis Force Sensing Wrist Kit with Arduino Uno + LED
3-Axis Force Sensing Wrist Kit with Arduino Uno + LED: Give Your Robot a Sense of Touch
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Robots that cannot feel contact forces struggle with delicate tasks like assembly, grinding, or safe human interaction. This kit turns an ordinary robot wrist into a 3-axis force sensing node. By placing three FSR 402 sensors in an orthogonal arrangement around the wrist, you create a compact analog module that quantifies the magnitude and direction of every push, pull, or collision — essential for advanced motor and motion control research.
What You'll Build
You will solder, wire, and calibrate a complete force sensing wrist that outputs real-time X, Y, Z force vectors onto an OLED display. The logged data includes a timestamp from the DS3231 RTC and stores on a microSD card for later analysis. Once installed on a robotic arm, this wrist provides force feedback for closed-loop position control or a collision flag in autonomous trajectories.
What You'll Learn
- Precision analog conditioning of FSR signals using an ADS1115 16-bit ADC
- Mechanical integration of three force sensors in an orthogonal coordinate frame
- Calibration routines that map raw ADC values to Newtons in X, Y, and Z axes
- Structured data logging with RTC timestamps for post-process force analysis
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | 1 |
| FSR 402 | 3 |
| ADS1115 ADC | 1 |
| 0.96in OLED | 1 |
| DS3231 RTC | 1 |
| MicroSD Module | 1 |
| 4.7kΩ Resistors | 5 |
| 100nF Capacitors | 10 |
| PCB Prototype Board | 2 |
| 9V Battery Snap | 1 |
| 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
This advanced kit is built for B.Tech ECE/EEE students tackling robotics capstone projects, research scholars prototyping force-aware grippers, and teams competing in Smart India Hackathon or IIT technical festivals. If you're integrating tactile sensing into a ROS-based manipulator or an ATL Tinkering Lab undergrad setup, this kit gives you a research-grade starting point without the months of sourcing and calibration.
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 inside the box to start a conversation with your AI companion. It can walk you through calibration steps, circuit checks, and code. If you prefer help from a human, send a photo of your setup on WhatsApp, and our team will respond within the day.
Can I interface this wrist with a standard 6-DOF robotic arm?
Yes. The wrist outputs force vectors via serial or I2C. You can read the data with any microcontroller or SBC (like Raspberry Pi) and feed it into inverse dynamics or admittance control algorithms running in ROS. The kit's robust mechanical mounting holes fit standard servo brackets.
Do I need advanced soldering skills?
This kit uses through-hole components on a prototype board. You'll solder about 40 joints. The included soldering iron is of good quality, and the AI companion provides a high-resolution soldering guide. With practice on the spare prototype board, assembly takes around 2 hours.
How accurate is the force measurement?
After the guided calibration (using known reference weights), the 16-bit ADC gives a resolution of about 0.1 N per channel. The orthogonal arrangement reduces cross-talk to under 5%. Accuracy depends on the mechanical mounting stiffness, but it is sufficient for grasp force monitoring and collision detection in research prototypes.
Three FSR sensors in orthogonal arrangement on robot wrist estimate 3D contact force vector.
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