CO Alert Kit with Arduino Nano + Sensor - Build a Carbon Monoxide Detector
CO Alert Kit with Arduino Nano + Sensor - Build Your Own Carbon Monoxide Detector for Home Safety
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Carbon monoxide is a silent, odourless gas that can be lethal in enclosed spaces. With this kit, you'll assemble a real working detector that flashes bright red LEDs and sounds a loud buzzer the moment CO levels cross a safe threshold, giving your home an early warning system you built yourself.
What You'll Build
You'll create a complete CO alarm on a breadboard. The MQ-7 sensor continuously samples air quality and sends readings to the Arduino Uno. When the concentration exceeds you-calibrated limit, three red LEDs light up and the active buzzer screams an alert-just like a commercial safety device.
What You'll Learn
- How MQ-7 electrochemical sensors detect carbon monoxide
- Reading analog signals and converting them to digital thresholds
- Building circuits on a breadboard without soldering
- Programming conditional logic to control LED and buzzer outputs
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | 1 |
| MQ-7 CO Sensor | 1 |
| Active Buzzer | 1 |
| 5mm Red LED | 3 |
| 220? Resistors | 5 |
| 10k? Resistors | 5 |
| 400-pt Breadboard | 1 |
| M-M Wires | 20 |
| 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
Ideal for CBSE/ICSE students working on science exhibitions, ATL Tinkering Lab innovators, and young makers curious about environmental sensors. With a build time of 2-3 hours and zero soldering, it's accessible for beginners as young as 10, guided by an adult, and makes a powerful project for school competitions.
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 to launch the AI companion for instant step-by-step help, or reach out on WhatsApp-our team responds within hours.
How do I test if the alarm works?
Briefly expose the MQ-7 sensor to the smoke from a blown-out match (at a safe distance). The Arduino will detect the gas and trigger the buzzer and LEDs.
Can I install this as a permanent home CO detector?
This kit is a learning project and not certified for continuous life-safety use. However, the circuit and code can be a foundation for a more robust solution with a proper enclosure and battery backup.
Does the sensor detect other gases?
The MQ-7 is sensitive to carbon monoxide and, to a lesser extent, hydrogen and LPG. The code can be adjusted to set thresholds only for CO.
MQ-7 CO sensor triggers alarm if carbon monoxide exceeds safe threshold. LED and buzzer warning.
What's in this kit
- Arduino Uno R3
- MQ-7 CO Sensor
- Active Buzzer
- 5mm Red LED x3
- 220? Resistors x5
- 10k? Resistors x5
- 400-pt Breadboard
- M-M Wires x20
- 9V Battery Snap
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