๐ ๏ธ MAKER GUIDEJun 15, 2026โขโฑ๏ธ 1 min readโข๐ณ๐ต Tested in Nepal
Multi-Zone Polyhouse Irrigation System with Capacitive Moisture & Solenoid Valves
Automate greenhouse watering with capacitive soil hygrometers, 12V solenoid valves, and 10A relay modules from Ghumti Pasal.
๐ ๏ธ BILL OF MATERIALS (BOM)
Required Hardware & Component Checklist
Curated components verified for this project. Check the items you need, adjust quantities, and add straight to cart:
Estimated Total (5/5 items):
NPRย 2,350
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NPRย 750
NPRย 600
(NPRย 300 ea)
NPRย 650
NPRย 150
NPRย 200
Multi-Zone Polyhouse Irrigation System with Capacitive Moisture & Solenoid Valves
Distribute water through drip lines using Capacitive Soil Moisture Sensors and a 12V DC Solenoid Valve switched by an Arduino Nano.
Hardware Bill of Materials:
- Microcontroller: Arduino Nano V3.0 Solderless
- Moisture Sensors: 2x Capacitive Soil Moisture Sensor Module 3.3~5.5V
- Water Valve: 12V DC Solenoid Valve 1/2 Inch Normally Closed for Water Flow
- Relay Board: 1 channel 5V 10A low level trigger Relay Module
- Power Adapter: 12v 1 Amp Power Adapter
Circuit Pinout & Wiring Connections:
| Component / Sensor Pin | Arduino Nano Pin | Function / Description |
|---|---|---|
| Zone 1 Moisture Analog OUT | Pin A0 | Polyhouse Bed 1 Moisture Level |
| Zone 2 Moisture Analog OUT | Pin A1 | Polyhouse Bed 2 Moisture Level |
| 1-Ch Relay IN | Pin D4 | Low Active Trigger for 12V Solenoid Valve |
| 12V Solenoid Valve Coil | Relay NO & 12V Adapter | High-Flow Drip Line Actuation |
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