Automated Compost Bin Aerator Kit with Arduino Uno + Relay
Build an Automated Compost Bin Aerator with Arduino Uno & Relay — Soil Health, Hands-Free
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Most compost failures go unnoticed until the pile turns slimy and smelly — by then, beneficial microbes are dead. This kit lets you step in earlier. You'll build a sensor suite that watches temperature and CO2 inside the bin, and when anaerobic conditions spike, a relay triggers an agitator motor to turn the pile automatically. Designed for students prototyping sustainable technology, home gardeners who want to scale, and anyone who's lost a batch to neglect.
What You'll Build
A fully functional compost bin monitoring and aeration system. Two DS18B20 probes track core and ambient temperature while the MH-Z19B CO2 sensor detects the sharp rise that signals oxygen depletion. When thresholds are crossed, the Arduino Uno activates a 5V relay to run an external agitator motor. Time-stamped readings appear on the OLED and are logged via the DS3231 RTC — so you see exactly when conditions turned and how long recovery took.
What You'll Learn
- Interface multiple digital sensors (1-Wire DS18B20, UART CO2 sensor) with Arduino Uno
- Program threshold-based relay control logic for automation
- Implement real-time clock data logging and OLED status display
- Calibrate gas sensors and handle transient readings in a noisy biological environment
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 Caps | 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
This kit matches B.Tech ECE and EEE students working on home automation or IoT coursework, Smart India Hackathon teams tackling environmental challenges, and ATL Tinkering Lab mentors who want an advanced, real-world automation project. It's also ideal for IIT, NIT, VIT, or BITS undergraduates building a sustainable campus initiative that combines sensors, data logging, and actuator control.
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 access the AI companion trained on this project, or reach us on WhatsApp for direct debugging help.
Does the kit include the agitator motor for the compost bin?
No, the motor is external because size and torque depend on your bin. The kit provides the relay module and control circuit; you'll supply a 5-12V DC motor suitable for your setup.
How do I calibrate the CO2 sensor for a compost environment?
The MH-Z19B comes pre-calibrated. The AI companion includes a calibration check routine using fresh air and a step to handle high-humidity drift common around decomposing material.
Can I log data to a cloud platform or view it remotely?
The OLED displays real-time readings and the RTC timestamps are stored locally. With an ESP8266 WiFi module (not included), you can push data to Blynk or ThingSpeak — a common extension covered in the AI companion's advanced section.
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