Gas Sensor Night Alert Kit with Arduino Uno + Sensor
Arduino Night Gas Alert Kit: Build a Leak Detector That Only Warns in Darkness
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 a gas leak alarm that stays quiet during the day—no false triggers when you cook—but springs to life at night when a silent leak could be deadly. This kit teaches you to create exactly that: a night-only safety alert. Using an MQ-2 sensor to detect smoke or LPG and an LDR to confirm darkness, the Arduino Uno sounds a buzzer only when both conditions are true. It’s a practical home automation project that blends sensor logic with real-world safety for Indian households.
What You'll Build
You will assemble a breadboard circuit that continuously reads gas concentration and ambient light. The active buzzer activates solely when the MQ-2 senses combustible gases and the LDR confirms the room is dark. Mount the finished board near your kitchen or LPG cylinder. You’ll have a fully functional, battery-operable alarm that could genuinely alert you to a midnight leak—a project that goes beyond blinking LEDs into life-saving territory.
What You'll Learn
- Calibrate the MQ-2 gas sensor for LPG, methane, and smoke detection
- Use an LDR as a light threshold detector to enable night-only logic
- Write Arduino code with logical AND conditions combining two analogue inputs
- Assemble and power a standalone circuit on a breadboard without any soldering
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | 1 |
| MQ-2 Gas Sensor | 1 |
| LDR | 1 |
| Active Buzzer | 1 |
| 10kΩ Resistors | 10 |
| 400-pt Breadboard | 1 |
| M-M Wires | 15 |
| 9V Battery Snap | 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 kit is ideal for CBSE Class 11–12 students crafting a home automation project, B.Tech ECE freshers exploring embedded systems, and hobbyists prepping for Smart India Hackathon. ATL Tinkering Lab mentors will value its straightforward introduction to sensor fusion. Even curious learners aged 8+ can follow the AI companion's voice guidance to build a gadget their family will actually use.
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?
Simply scan the QR code to chat with the AI companion, which has been trained on the exact circuit and code. You’ll also receive WhatsApp support for trickier debugging.
Can this kit detect carbon monoxide?
The MQ-2 sensor is sensitive to LPG, methane, butane, smoke, and alcohol vapour. It does not reliably detect carbon monoxide. For CO-specific alerts you would need a different sensor, but this kit makes an excellent learning foundation for any gas safety project.
Will the alarm work during a power cut?
Yes. The included 9V battery snap powers the Arduino independently. Keep a battery connected so the alarm remains active even when mains electricity is off—perfect for Indian homes where power cuts can occur at night.
Is the code simple enough for a beginner to understand?
Absolutely. The Arduino sketch reads two sensors, compares their values against thresholds, and activates the buzzer only if both conditions are met. It’s a short program that introduces analogue inputs, digital outputs, and logical operators—all explained line-by-line by the AI companion.
MQ-2 triggers buzzer only when LDR confirms night time. Dual condition safety alert.
What's in this kit
- Arduino Uno R3
- MQ-2 Gas Sensor
- LDR
- Active Buzzer
- 10kΩ Resistors x10
- 400-pt Breadboard
- M-M Wires x15
- 9V Battery Snap
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