Multi-Zone Alarm with Auto Arm
Build a Multi-Zone Alarm with Auto Arm – Arduino Mega Kit
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Imagine walking into your room knowing your belongings are protected – even if you forget to lock up. This kit lets you build a multi-zone security system that arms itself automatically at night, detects motion across three zones, and only disarms with a secret code on the keypad. Whether it’s for a hostel room, a laboratory, or a personal workspace, you’ll gain practical experience with real-time clocks, PIR sensors, and Arduino programming.
What You'll Build
You’ll assemble a working alarm system with three motion detection zones, an OLED display showing arm status and zone alerts, and a code-protected disarm sequence. The system auto-arms at pre-set times using the DS3231 RTC, so you never forget to activate it. A 5V relay output can trigger an external siren or light for physical deterrence.
What You'll Learn
- How to interface multiple PIR sensors with Arduino Mega and manage zone-specific triggers.
- Programming a DS3231 real-time clock to schedule automatic arm/disarm cycles.
- Using a 4x4 matrix keypad to input and verify a disarm code.
- Driving an OLED display to show system status, time, and alarm events.
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Mega 2560 | x1 |
| HC-SR501 PIR | x3 |
| DS3231 RTC | x1 |
| 4x4 Keypad | x1 |
| Active Buzzer | x1 |
| 5V Relay Module | x1 |
| 0.96in OLED | x1 |
| 1N4007 Diode | x5 |
| 10kΩ Resistors | x10 |
| 100nF Caps | x10 |
| PCB Prototype Board | x2 |
| 12V Adapter | x1 |
| Soldering Iron | x1 |
| Solder Wire | x1 |
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 designed for B.Tech (ECE, EEE) students building final-year security projects, Smart India Hackathon participants prototyping real-world solutions, and hostel residents who want a DIY, tamper-proof alarm. If you’ve mastered Arduino basics and are ready to tackle multi-sensor integration and timing logic, this kit delivers a substantial, practical challenge.
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 on the box to talk to the Compoden AI companion. It understands this exact project and can guide you through wiring, code debugging, and logic checks. WhatsApp and email backup are also included.
Can I expand the system with more PIR sensors?
Yes, the Arduino Mega has enough digital pins. The AI companion includes notes on adding up to five additional PIR sensors without affecting performance.
How is the disarm code set?
You’ll program the default code in the Arduino sketch; later, you can change it by modifying a variable and re-uploading the code. The keypad entry routine checks the entered digits against this stored code.
What if the alarm triggers while I'm away?
The relay output can be connected to a louder external siren or even a GSM module to send an SMS alert (not included, but the AI companion suggests compatible modules).
Security system auto-arms via RTC schedule. PIR zones trigger alarm. Code disarms via keypad.
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.
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