Automated Compost Turner Kit
Automated Composting Turner Kit - Arduino-Powered Thermal Monitoring and Motor Control System
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Maintaining active compost requires consistent internal temperatures between 54 and 71 degrees Celsius. When the core cools below this thermophilic range, microbial activity stalls and decomposition slows dramatically. This kit equips you to build a self-monitoring system that reads a four-point DS18B20 probe array, logs temperature decay patterns via the DS3231 RTC onto a MicroSD card, and automatically triggers a 12V DC motor through an L298N driver to turn the pile when the average reading crosses a programmable threshold.
What You'll Build
A standalone compost management node that installs directly into your pile structure. The four DS18B20 probes form a vertical sensing ladder capturing thermal stratification from surface to core. When the lowest probe reading indicates the active zone is cooling, the Arduino Uno fires the L298N to drive the turner motor, mixing fresh feedstock into the hot centre. Temperature trends, turn events, and timestamps display on the OLED and write to removable storage for crop-cycle analysis.
What You'll Learn
- Calibrate and multiplex four DS18B20 one-wire temperature sensors into a single Arduino data bus
- Design H-bridge motor control circuits using the L298N driver with flyback diode protection from 1N4007 components
- Implement time-stamped data logging with DS3231 RTC and MicroSD module for offline farm analytics
- Program threshold-based automation logic that converts raw sensor averaging into a physical actuation signal
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | 1 |
| DS18B20 Probe | 4 |
| L298N Driver | 1 |
| DC Motor 12V | 1 |
| DS3231 RTC | 1 |
| MicroSD Module | 1 |
| 0.96in OLED | 1 |
| 4.7k? Resistors | 5 |
| 1N4007 Diode | 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
Built for B.Tech ECE and Agricultural Engineering students tackling precision farming capstone projects, Smart India Hackathon participants addressing food waste through automation, and ATL Tinkering Lab mentors guiding advanced embedded systems modules. The soldering iron and prototype boards are included because this project expects you to build permanent sensor harnesses - not just breadboard a proof of concept. If you are preparing for college festivals at VIT, BITS Pilani, or NITs where functional hardware demos carry weight, this system demonstrates genuine closed-loop 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 your AI companion trained specifically on the Automated Composting Turner Kit. It walks you through sensor calibration, L298N wiring, and threshold logic. If you need human help, message us on WhatsApp and a Compoden engineer who has built this exact system responds within hours.
Can I modify the temperature threshold for different compost materials like vermicompost versus thermophilic piles?
Yes. The Arduino sketch stores the trigger threshold as a variable you set before uploading. For vermicompost, you might lower the turn trigger to 25 degrees Celsius. For hot composting with grass clippings and manure, set it closer to 55 degrees. The OLED displays your current threshold during operation so you can verify the setting.
How do I power this in a field environment away from mains electricity?
The included 12V adapter works from any AC outlet, but the motor and Arduino Uno both accept 12V DC input from a deep-cycle battery or solar charge controller. The 1N4007 diodes in the kit protect against reverse polarity if you wire an external battery source. We recommend a 12V 7Ah sealed lead-acid battery for approximately six hours of autonomous turning operation.
Does the data logging work without a laptop connected?
Yes, completely standalone. The DS3231 RTC keeps accurate time even when the system is unplugged, and the MicroSD module writes timestamped temperature readings and turn events directly to a FAT32 formatted card. Remove the card and load the CSV file into any spreadsheet for trend analysis.
DS18B20 array detects when compost core temperature drops below active decomposition threshold and triggers turner motor.
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