Aquaponics Water Quality Kit with Arduino Mega + Relay
Arduino Mega Aquaponics Water Quality & Auto-Fertigation Kit — Precision Nutrient Control on a RTC Schedule
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
When a nutrient imbalance in aquaponics can stall plant growth within hours, the window to correct EC and pH is ruthlessly short. This kit puts four sensors, a real‑time clock, and a multi‑channel relay behind a single Arduino Mega, so your system can measure TDS, EC, and pH on schedule, trigger a fertigation pump only when conductivity drops below a preset threshold, and log every event to MicroSD — all without a laptop connected.
What You'll Build
You’ll assemble and program a standalone controller that reads dissolved solids and pH from the water column, compares them against user‑defined targets, and activates a relay‑driven dosing pump during RTC‑scheduled windows. The outcome is a closed‑loop fertigation module that prevents nutrient drift and records parameter history for later agronomic analysis.
What You'll Learn
- Calibrating analog TDS/EC meters and pH probes with standard buffer solutions
- Programming a DS3231 RTC to enforce time‑gated dosing windows on an Arduino Mega
- Driving a 4‑channel relay module safely while protecting GPIOs with flyback diodes
- Logging sensor arrays to MicroSD and displaying real‑time EC/pH on a 0.96″ OLED
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Mega 2560 | 1 |
| TDS EC Meter | 1 |
| Analog pH Module | 1 |
| DS3231 RTC | 1 |
| 4-ch Relay Module | 1 |
| MicroSD Module | 1 |
| 0.96in OLED | 1 |
| 1N4007 Diode | 10 |
| 10kΩ Resistors | 10 |
| 100nF Caps | 10 |
| PCB Prototype Board | 2 |
| 12V 2A 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
Designed for B.Tech ECE and EEE students prototyping smart‑farming solutions for final‑year projects or the Smart India Hackathon. Also a ready‑made practical for ATL‑trained undergraduates moving into precision agriculture at NIT, VIT, or BITS. If you’ve wrestled with analog sensor noise and 5V‑12V isolation before, this build formalizes those skills into a reproducible embedded system.
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?
The AI companion inside the box walks you through debugging sensor readings, relay wiring, and code logic. If you need a human eye, WhatsApp us and a build engineer will respond within the hour.
Can I use this kit for hydroponics instead of aquaponics?
Yes. The EC/pH monitoring and relay triggering logic is identical — just swap the nutrient solution and ignore the fish‑waste component of your reading interpretation.
Does the kit include dosing pumps?
The kit provides the 4‑channel relay module and all control circuitry to drive standard 12V peristaltic pumps (not included), which you can source locally or from our store.
How accurate are the TDS and pH readings?
After the included calibration process with buffer solutions, the sensors deliver ±2% EC accuracy and ±0.1 pH, suitable for production‑scale aquaponics monitoring.
Aquaponics — TDS EC meter + pH sensor + RTC trigger fertigation pump at precise EC target during scheduled watering.
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