Garage Smoke Alarm Pro Kit with Arduino Uno + Sensor
Arduino-Powered Garage Smoke Alarm Kit with SMS Alerts
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Garage fires from undetected LPG or natural gas leaks are a persistent risk in Indian homes. This kit equips you to build a proactive safety system that senses combustible gases and carbon monoxide, then automatically shuts off the gas supply via a solenoid valve while sounding an alarm and dispatching SMS alerts through SIM800L. It transforms a theoretical concept into a deployable security solution for real garages, workshops, or ATL labs.
What You'll Build
You will assemble a multi-sensor smoke alarm that monitors air quality for methane, propane, and carbon monoxide. On detecting dangerous gas levels, the Arduino Uno triggers a red LED visual alert, activates an active buzzer at 90 dB, powers a 12V solenoid valve to close the gas line, and sends an SMS to a predefined number with the gas concentration reading. The entire system mounts on a PCB prototype board, ready for enclosure integration.
What You'll Learn
- Calibrating MQ-2 and MQ-7 sensors for accurate gas sensitivity in ppm ranges
- Programming Arduino Uno to fuse data from two sensors and implement threshold logic
- Interfacing a SIM800L GSM module for reliable SMS transmission with noise filtering
- Designing a relay-driven control circuit to manage a high-current solenoid valve safely
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | 1 |
| MQ-2 | 1 |
| MQ-7 CO Sensor | 1 |
| SIM800L GSM | 1 |
| 5V Relay Module | 1 |
| Active Buzzer | 1 |
| 5mm Red LED | 3 |
| LM2596 Buck Converter | 1 |
| 1000µF 25V Caps | 2 |
| 10kΩ Resistors | 5 |
| 220Ω Resistors | 5 |
| PCB Prototype Board | 2 |
| 12V Solenoid Gas Valve | 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
This kit challenges B.Tech ECE and EEE students building final-year projects or preparing for the Smart India Hackathon. It suits advanced hobbyists from IITs, NITs, VIT, or BITS Pilani who need a working prototype for IoT safety demonstrations. ATL Tinkering Lab mentors can also use it to teach sensor calibration and actuator control beyond basic Arduino tutorials.
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 access our AI companion, which has been trained on this exact garage alarm project. It can guide you through sensor calibration, SIM800L configuration, or relay wiring. If you still need help, send a message on WhatsApp — a real engineer from our Bengaluru team responds within hours.
Can this kit detect both smoke and carbon monoxide?
Yes, the MQ-2 sensor detects combustible gases like methane and propane, which indicate a potential fire source, while the MQ-7 specifically monitors carbon monoxide — a deadly, odorless byproduct of incomplete combustion. The Arduino programming fuses both readings to trigger the alarm and valve only when necessary, reducing false positives from things like cooking fumes.
Is the solenoid valve compatible with Indian gas cylinders?
The included 12V solenoid valve has a 1/4-inch thread that fits standard Indian LPG and PNG pipelines with common brass adapters. You must ensure your gas cylinder regulator matches the connection type, and the kit’s instructions include a safety guide for installing it on a gas inlet without leaks.
What happens if there’s a power failure during a gas leak?
The LM2596 buck converter and 1000µF capacitors stabilize the Arduino and sensors during brownouts, but for full resilience, you’ll need a separate 12V battery backup. The solenoid valve is normally closed without power, so it fails-safe: if power dies, the gas line remains shut until pressure is manually reset, preventing flow after an outage.
Garage Fire — MQ-2 + MQ-7 sensors detect gas. Relay closes solenoid gas valve, triggers alarm and SIM800L sends SMS.
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