Arduino Nano. Capacitive soil moisture sensor. Raspberry Pi 3. 5V solenoid water valve + relay. Workflow: Arduino checks moisture and sends readings to the Pi. A Python script on the Pi decides when ...

Using current control can solve this dilemma, since designers can utilize the 12-V relay or solenoid for both 12- and 24-V systems, and even be prepared for a next-generation product that may have ...