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  • $10-15 Automatic Digital Soil Moisture Relay

    I really like the idea of using this relay for a hydroponics system. My only concern is that you're using a relay that is rated at 5v with a 12v power supply. Did you add any sort of voltage regulator to this? You could probably just use an old computer power supply. That would provide 12v for the pump and 5v for the relay. Any thoughts on this?

    I really like the idea of using this relay for a hydroponics system. My only concern is that you're using a relay that is rated at 5v with a 12v power supply. Did you add any sort of voltage regulator to this? You could probably just use an old computer power supply. That would provide 12v for the pump and 5v for the relay. Any thoughts on this?

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