Blind Stick Obstacle Detector Kit with Arduino Mega + Ultrasonic
Build a Generative-Music Assistive Cane with Arduino Mega & Ultrasonic Sensors
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
This kit transforms a standard white cane into an intelligent navigation aid that layers real-time environmental data into musical soundscapes. Three PIR motion sensors and two ultrasonic rangefinders feed an algorithm on the Arduino Mega, triggering layered audio samples on dual DFPlayer Mini modules. A dedicated MCP4725 DAC adds a rich reverb tail, turning distance and motion into an immersive stereo field. The result is a prototype assistive device that helps visually impaired users hear their surroundings—obstacles become crescendos, open spaces become calm drones.
What You'll Build
A fully functional obstacle detection module that mounts onto any mobility cane. The system reads 360-degree proximity through PIR and HC-SR04 sensors, then generates a continuously evolving soundscape: closer objects layer urgent tones with increasing reverb, while distant obstacles produce soft, spatialized pads. The dual DFPlayer setup plays from microSD cards, and the PAM8403 amplifier drives two 3W speakers. Housed in a custom enclosure, the device becomes a wearable audio compass that paints space through sound.
What You'll Learn
- Sensor fusion: combining PIR motion detection with ultrasonic ranging to create a responsive 360-degree awareness field.
- Audio synthesis: programming DFPlayer Mini modules to layer sound samples and applying reverb via an MCP4725 DAC.
- Advanced soldering and PCB prototyping: building a robust multi-module circuit on perfboard, managing power distribution, and reducing noise in analog audio paths.
- Accessibility design principles: translating environmental data into meaningful, non-visual feedback loops for visually impaired users.
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Mega 2560 | 1 |
| HC-SR501 PIR | 3 |
| HC-SR04 | 2 |
| DFPlayer Mini | 2 |
| MicroSD Card 8GB | 2 |
| MCP4725 DAC | 1 |
| PAM8403 Amp | 1 |
| 3W 8Ω Speaker | 2 |
| 10kΩ Resistors | 10 |
| 100nF Caps | 15 |
| PCB Prototype Board | 3 |
| Enclosure Box | 1 |
| 12V 2A PSU | 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
Advanced engineering students—especially B.Tech ECE final-year project groups, Smart India Hackathon participants, and researchers at IIT/NIT/VIT/BITS exploring assistive technology. Also suitable for practicing engineers in accessible device startups and hobbyists who want to combine sensor data processing with real-time audio DSP. If your focus is on human-computer interaction, audio-based navigation, or inclusive design, this kit delivers a complete, shareable prototype.
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 from the QR code for instant debugging; if you need a human, our team responds on WhatsApp within an hour during business days.
Is this kit suitable for a visually impaired person to assemble alone?
Assembly requires detailed soldering and programming, so we recommend building with a sighted aide or as part of a team under accessibility supervision.
Can I customize the audio feedback to include voice prompts?
Yes, the Arduino Mega has spare I/O, and the DFPlayer supports MP3 playback. You can program custom voice alerts or melodic cues based on sensor thresholds.
Does the kit include a cane or walking stick?
The enclosure and electronics are designed to attach to any standard white cane; the physical mobility stick is not included.
Accessibility — PIR and distance sensors feed generative music algorithm. DFPlayer layers samples with reverb tail from MCP4725.
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