Smart Blind Stick — DIY Kit
Dual ultrasonic, pothole detection, distinct haptic and audio zones.
₹1,399MADE TO ORDER
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12 mo warranty · you assemble · ships in 2 days
What you can demonstrate
- →Four alert zones that differ in feel, not just in volume
- →Downward sensor flags a step-down or pothole with a triple buzz
- →Rain sensor gives a separate two-tone alert on a wet surface
- →LDR switches the torch LED on after dark
Bill of materials
Every component, by part number. Check our prices against any supplier you like.
| Part | Description | Qty |
|---|---|---|
| Arduino Nano V3 | ATmega328P, CH340 USB | 1 |
| HC-SR04 | Ultrasonic ranger — front and downward | 2 |
| Rain/water sensor board | Analog puddle detection | 1 |
| Buzzer 5V active | Piezo, audible alert | 1 |
| Coin vibration motor 10 mm | Haptic alert | 1 |
| 2N2222 + 1N4007 + 1kΩ | Motor driver with flyback diodeThe motor must never sit on a Nano pin — back-EMF resets the board | 1 |
| LDR + 10kΩ | Ambient light divider | 1 |
| White LED 5 mm + 220Ω | Automatic torch | 1 |
| Tactile switch 6 mm | Mode button | 1 |
| Walking stick, aluminium | 900 mm, sensors pre-mounted | 1 |
| Sensor mount, 3D printed | PLA, front and ground angle | 2 |
| USB-A pigtail + cable | 1 m, runs off any 5V power bankPower bank not included | 1 |
| Wire, heatshrink, ties | Assembly consumables | 1 |
Questions
- Does a power bank come with it?
- No. Lithium cells are restricted on air and surface courier, so the stick ships with a USB pigtail and runs off any 5V power bank you already own.
- What makes the pothole alert different?
- A second ultrasonic sensor points 30° down with a ~60 cm baseline to the floor. Three consecutive readings past 90 cm means the ground fell away. Most competing projects skip this, and it is the feature that earns marks.
- Does the report come with it?
- Yes. Every kit ships with the editable report (.docx and .pdf), a 20-slide PPT, circuit and block diagrams, commented source with pinned library versions, 25 viva questions with answers, and a printed wiring sheet in the box.
- Can I change the topic or add a feature?
- Tell us on WhatsApp before you order. Small firmware changes are usually fine; a different sensor means a different kit and a different price.
- Is there cash on delivery?
- No. Prepaid only — UPI, card or netbanking. It keeps the price where it is.
- Will the report match my college format?
- The .docx is unlocked and editable, so you add your college name, roll number and guide. The chapter skeleton follows the standard Anna University / AICTE structure.
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₹1,399