Precision pH and EC Hydroponics Controller Kit with Arduino Mega + Relay
Precision pH and EC Hydroponics Controller Kit — Automate Nutrient Dosing with Arduino Mega + Relay
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Build a fully automated hydroponics dosing station that continuously monitors pH, electrical conductivity, and solution temperature, then triggers peristaltic pumps to maintain the perfect nutrient balance. This advanced kit uses two-point calibration for both the analog pH probe and the TDS/EC meter, compensating for temperature drift via waterproof DS18B20 sensors. Ideal for agricultural automation projects, final-year engineering prototypes, and serious hobbyists aiming to replace manual testing with a self-correcting system.
What You'll Build
A real-time nutrient controller that reads pH and EC values, displays them on an OLED, logs data with timestamps to a microSD card, and uses a 4-channel relay module to drive dosing pumps. You'll solder the sensor interfaces onto prototype boards, route power and signal lines, and flash firmware that implements threshold-based pump activation. The result is a bench-ready hydroponic brain that can be scaled to deep water culture, NFT, or drip systems.
What You'll Learn
- Two-point calibration of analog pH and EC sensors using standard buffer solutions and temperature compensation
- Design and wiring of a multi-sensor data acquisition system with DS18B20 digital temperature probes
- Relay sequencing logic for peristaltic pump control based on sensor feedback and configurable setpoints
- Real-time clock synchronization and CSV data logging to SD card for later analysis in the lab
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Mega 2560 | 1 |
| Analog pH Module | 1 |
| TDS EC Meter | 1 |
| DS18B20 Waterproof | 2 |
| 4-ch Relay Module | 1 |
| DS3231 RTC | 1 |
| MicroSD Module | 1 |
| 0.96in OLED | 1 |
| 4.7kΩ Resistors | 5 |
| 10kΩ Resistors | 10 |
| 100nF Caps | 15 |
| 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
Advanced students in B.Tech ECE/EEE and agricultural engineering designing closed-loop fertigation prototypes. Smart India Hackathon teams working on precision farming challenges. ATL and institutional labs that need a reliable, calibration-focused sensor kit for higher-level coursework. Hydroponics startups validating automated nutrient dosing before scaling to production environments.
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 provides step-by-step wiring diagrams and code explanations. For additional help, WhatsApp message us with a photo of your setup and we'll respond within hours.
How do I calibrate the pH and EC sensors?
The kit includes a detailed two-point calibration guide using standard buffer powders (pH 4.0, 6.86 for pH; 1413 µS/cm for EC). The AI companion walks you through the process with real-time voltage-to-value mappings on the OLED.
Can I control actual peristaltic pumps with this kit?
Yes. The 4-channel relay module can directly switch 12V peristaltic pumps. The sample firmware includes configurable setpoint windows and pump running timers to avoid overshooting nutrient targets.
Does this kit work for both deep water culture and NFT systems?
Absolutely. The sensors and dosing logic are independent of the hydroponic method. You can mount the pH and EC probes in the reservoir or recirculating line and adjust relay thresholds for any system volume.
Analog pH + TDS EC + DS18B20 all calibrated with two-point method. Relay dosing pumps auto-correct nutrient balance.
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