Blind Spot Home Monitor Kit with Arduino Mega + Ultrasonic
Arduino Mega-Powered Blind Spot Home Monitor Kit for Elderly Fall Prevention
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
One in three elderly individuals falls each year, often due to an undetected presence approaching from behind. This kit equips you to build a four-sensor ultrasonic monitoring system that detects objects in blind spots around a room or corridor and instantly triggers an audible alarm—turning passive danger into active protection.
What You'll Build
You will wire and code a wall‑mounted Arduino Mega station that continuously scans four directions using HC‑SR04 sensors. When an object comes within a programmable danger zone, a loud buzzer sounds and the event is logged to a MicroSD card with an exact timestamp from the DS3231 RTC. The 0.96‑inch OLED shows live distance readings, giving an at‑a‑glance safety view.
What You'll Learn
- Multi‑channel ultrasonic sensor polling and real‑time distance calculation
- Precision time‑stamping of safety events using the DS3231 real‑time clock
- Data logging to MicroSD in a fault‑tolerant format for later analysis
- Designing a reliable 9V battery‑based power circuit with decoupling capacitors
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Mega 2560 | 1 |
| HC-SR04 | 4 |
| 0.96in OLED | 1 |
| Active Buzzer | 1 |
| DS3231 RTC | 1 |
| MicroSD Module | 1 |
| 10kΩ Resistors | 10 |
| 100nF Caps | 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
B.Tech ECE/EEE students building their final‑year assistive technology project will find a ready‑to‑integrate sensor array. Smart India Hackathon teams tackling healthcare or elderly safety themes can prototype rapidly. Makers at IIT, NIT, VIT, or BITS Pilani who want a practical, soldering‑heavy build with real‑world impact will appreciate the rigorous component selection and pre‑written hardware libraries included in the AI companion.
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 on any device; it recognizes your current step and suggests fixes. If needed, a Compoden engineer joins you over WhatsApp for real‑time troubleshooting.
How accurate is the blind spot monitoring?
The HC‑SR04 sensors detect objects within 2‑400 cm with 3 mm resolution. Calibration is covered in the companion guide so you can fine‑tune the alert zone for a specific doorway or room corner.
Can I log the alert data for caregiver review?
Yes. The MicroSD module stores every trigger with a date‑time stamp from the DS3231. You can remove the card and open the CSV file on any computer to analyse patterns.
Is this suitable for an elderly person's room?
Absolutely. The OLED displays calm, large‑font distance values, and the buzzer tone can be adjusted in code to be noticeable but not startling. The battery‑operated design means no trailing wires across the floor.
Four HC-SR04 ultrasonic on outside walls measure proximity of approaching objects for elderly safety alert.
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.
Other projects you can build
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