Classroom CO2 Monitor Kit
Classroom CO2 Monitor Kit — Build a Real-Time Air Quality Dashboard with Arduino Mega
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Schools in India are paying attention to indoor air quality like never before. This kit lets you build a full-fledged ventilation monitor that reads LPG, ethanol, smoke, and CO2 simultaneously — then distills them into a single AQI score displayed on a colour TFT screen. It’s the kind of project you’d present at a Smart India Hackathon or submit as a final-year engineering showcase.
What You'll Build
You'll assemble a station that continuously monitors classroom air, logs data to a microSD card with timestamps, and shows a live AQI gauge on a 1.8-inch TFT. When CO2 rises above 1,200 ppm or smoke is detected, visual alerts kick in. The same build can be repurposed for hostel rooms, labs, or even a mini weather station.
What You'll Learn
- Calibrating and cross-referencing MQ-2, MQ-135, and MH-Z19B sensors for meaningful AQI computation
- Driving an ST7735 TFT display with custom graphics and live gauge readouts using Arduino Mega
- Timestamping sensor logs on a microSD module using the DS3231 real-time clock
- Designing a stable multi-sensor circuit on prototype board, managing power with capacitors and filter resistors
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Mega 2560 | 1 |
| MQ-2 Gas Sensor | 1 |
| MQ-135 Gas Sensor | 1 |
| MH-Z19B CO2 Sensor | 1 |
| 1.8in TFT ST7735 | 1 |
| DS3231 RTC | 1 |
| MicroSD Module | 1 |
| 10kΩ Resistors | 10 |
| 100nF Capacitors | 10 |
| PCB Prototype Board | 2 |
| Male-Male Jumper Wires | 30 |
| 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 advanced kit fits B.Tech ECE/EEE students working on ventilation or IoT-based air quality projects, CBSE Class 12 candidates looking for a standout computer science or physics investigatory, and teams preparing for Smart India Hackathon environmental challenges. It also aligns with ATL Tinkering Lab Level 2 and is popular among final-year engineering students at IITs, NITs, VIT, and BITS Pilani.
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 chat with our AI companion tuned to every wiring detail and code line of this project. If you need a human, reach us on WhatsApp and we’ll get you unstuck within a few hours.
Can I deploy this for real-time classroom monitoring?
Yes. The kit logs timestamped data to a microSD card and displays live AQI. With a simple enclosure (not included) and a 9V battery, you can run it for days. For permanent deployment, add a USB power bank or wall adapter.
Do I need to calibrate the sensors myself?
The AI companion includes a calibration routine specific to this set of sensors. You’ll heat up the MQ sensors for 24 hours, then run a simple sketch that adjusts baselines — all clearly explained step by step.
What if my school doesn’t have a soldering station?
All connections use the included male-male jumper wires and a large prototype board, so no soldering is required. You can assemble the entire circuit just by pressing wires into the breadboard-like terminal.
School Ventilation — MQ-2, MQ-135 and MH-Z19B measure LPG, air quality and CO2 simultaneously. Combined AQI score on TFT display.
What's in this kit
- Arduino Mega 2560
- MQ-2 Gas Sensor
- MQ-135 Gas Sensor
- MH-Z19B CO2 Sensor
- 1.8in TFT ST7735
- DS3231 RTC
- MicroSD Module
- 10kΩ Resistors x10
- 100nF Caps x10
- PCB Prototype Board x2
- M-M Wires x30
- 9V Battery Snap
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