Smart Irrigation Using Soil Moisture
Overview
A soil moisture sensor can provide an input to a controller that operates a small low-voltage pump through a correctly rated driver.
Materials
Controller, compatible moisture sensor, low-voltage pump, transistor/relay driver as required, power supply and tubing.
Steps
- Read moisture levels in dry and damp soil.
- Calibrate a practical threshold.
- Use driver circuitry to activate a small pump when needed.
- Add timed limits to avoid continuous running.
Protect electronics from water and isolate higher-current motor power appropriately.