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
Do you deliver across India?
Yes. We ship CO Alert Kit with Arduino Nano + Sensor - Build a Carbon Monoxide Detector across India including Delhi, Mumbai, Bangalore, Hyderabad, Chennai, and Pune. Orders ship in 1-5 days.
What payment options are available for CO Alert Kit with Arduino Nano + Sensor - Build a Carbon Monoxide Detector?
We accept UPI, all major debit and credit cards, and Cash on Delivery (COD), available across India.
Built and shipped from Compoden, with COD and UPI available across India.
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