Meeting Room Ventilation Monitor Kit with Arduino Uno + Motor
Meeting Room Ventilation Monitor Kit — Automate Fresh Air with Arduino and DS18B20 Sensors
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Stuffy meeting rooms aren't just uncomfortable — elevated CO2 directly impacts decision-making and alertness. This kit guides you to build a permanent, wall-mounted monitor that reads CO2 and temperature across multiple points, then triggers a DC motor fan when ventilation falls below safe thresholds. You'll solder sensor probes onto prototype PCBs, calibrate the MH-Z19B CO2 module, and code Arduino logic that logs every reading to a microSD card with real-time timestamps. It's the exact type of integrated sensor-actuator project that dominates final-year engineering demos and Smart India Hackathon prototypes.
What You'll Build
A complete air-quality regulation node that continuously samples four DS18B20 temperature probes and one NDIR CO2 sensor, displays readings on an OLED screen, and drives a 12V motor via L298N when CO2 exceeds your preset ppm limit. The DS3231 RTC stamps data on a MicroSD module so you can analyze ventilation patterns over days. All components mount on two PCB prototype boards, soldered into a rugged assembly.
What You'll Learn
- Calibrate and read an MH-Z19B NDIR CO2 sensor using UART communication
- Multiplex four DS18B20 probes on a single OneWire bus with parasitic power
- Control a 12V DC motor through an L298N H-bridge with Arduino PWM
- Log timestamped sensor data to a FAT32 microSD card using the DS3231 RTC
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | 1 |
| DS18B20 Probe | 4 |
| MH-Z19B CO2 | 1 |
| L298N Driver | 1 |
| DC Motor 12V | 1 |
| DS3231 RTC | 1 |
| MicroSD Module | 1 |
| 0.96in OLED | 1 |
| 4.7kΩ Resistors | 5 |
| 100nF Caps | 10 |
| PCB Prototype Board | 2 |
| 12V Adapter | 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 advanced kit targets B.Tech ECE and EEE students building capstone projects, Smart India Hackathon participants prototyping IoT solutions, and IIT/NIT/VIT/BITS learners who need a reliable, sensor-dense platform for air-quality monitoring. It's equally suited for ATL Tinkering Labs mentoring students on real-world embedded systems, or CBSE Class 11-12 innovators pushing beyond breadboard exercises.
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 open our AI build companion trained on this exact project, or message us on WhatsApp with a photo of your setup — we usually debug within the hour.
Can I repurpose this kit for compost aeration monitoring?
Absolutely. The same DS18B20 array and CO2 sensor can detect anaerobic conditions in compost piles. Adjust the threshold logic in Arduino code to drive the motor when CO2 spikes and temperature rises.
Does the kit include software and libraries?
All necessary libraries for the MH-Z19B, DS18B20, DS3231, OLED, and SD card are open-source. Our AI guide provides direct download links and custom calibration code snippets.
How do I mount the four temperature probes?
The probes come with 1-meter waterproof cables. You can place them at different heights or locations in the room. The included PCB prototype boards let you solder breakout headers for clean, distributed wiring.
Meeting Room — DS18B20 array and CO2 detect anaerobic conditions and trigger relay DC motor to aerate compost.
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.
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