Automated Compost Bin Aerator Variant 16 Kit with Arduino Uno + Relay
Automated Compost Aerator Kit: Arduino Uno + CO2 Sensor for Healthier, Odor-Free Compost
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Compost needs oxygen to work its magic — without it, your pile turns into a smelly, slimy mess. This advanced kit lets you automate the turning process using precise environmental data. You'll build a sensor module that monitors compost temperature and CO2 in real time, then triggers a relay-driven agitator motor to aerate the pile whenever anaerobic conditions are detected. No more manual monitoring, no more guesswork.
What You'll Build
You'll assemble a fully functional control unit around an Arduino Uno, with dual DS18B20 probes measuring the compost core temperature versus ambient air, and an MH-Z19B NDIR CO2 sensor sampling gas levels inside the bin. A 0.96-inch OLED displays live readings, while a DS3231 RTC stamps each data point. When CO2 rises above your set threshold — signaling oxygen depletion — the 5V relay switches on an external agitator motor to mix fresh air into the pile. All components are soldered onto prototype boards, ready for enclosure in a weatherproof box.
What You'll Learn
- Interface multiple digital and analog sensors (DS18B20 over OneWire, MH-Z19B over UART) with Arduino.
- Write Arduino code to read CO2 and temperature, compare against logic thresholds, and actuate a relay.
- Use a DS3231 RTC module to log sensor data with precise timestamps and schedule aeration cycles.
- Solder and assemble a permanent circuit on two prototype boards, preparing it for field deployment.
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | 1 |
| DS18B20 Probe | 2 |
| MH-Z19B CO2 | 1 |
| 5V Relay Module | 1 |
| 0.96in OLED | 1 |
| DS3231 RTC | 1 |
| 1N4007 Diode | 5 |
| 4.7kΩ Resistors | 5 |
| 100nF Capacitors | 10 |
| PCB Prototype Board | 2 |
| 9V Battery Snap | 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
Engineered for B.Tech ECE and EEE students building final-year projects or participating in Smart India Hackathon challenges around waste management and sustainability. Also perfect for serious DIYers from NIT, IIT, VIT, and BITS campuses who want a data-driven compost automation system. If you can solder and code basic Arduino, this kit pushes your skills into real-world embedded automation.
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 inside the box to launch the AI companion, which walks you through each wiring connection and code block. If you need a human, message us on WhatsApp — response typically within an hour.
Do I need a separate motor for agitation?
The included 5V relay can switch any external motor up to 10A, 250VAC. We recommend a small 12V DC geared motor with a paddle attachment for composting bins (motor not supplied).
What CO2 level should I set for triggering the relay?
Normal air has around 400 ppm CO2. Inside an actively composting pile, readings can exceed 2000 ppm when oxygen is depleted. Start with a threshold of 1500 ppm in code, adjust based on your bin’s performance.
Can I run this system outdoors?
Yes, once the circuit is soldered and enclosed in a waterproof box. The kit includes a 9V battery snap for testing; for permanent outdoor use, power via a 9V DC adapter or a solar panel with a compatible battery bank (not included).
DS18B20 + CO2 sensor detect anaerobic conditions and trigger relay agitator 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.
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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