Dear Arduino Forums, Hi! I currently have a Seeeduino v2.21 ATmega328p board connected to a Seeedstudio 4-channel 9V relay shield. There are two solenoid valves involved in the set up. One is controlled by the seeeduino board, the other is not. My switch is a DPDT Toggle Switch with On(left)-Off-O…

DPDT Toggle switch and Arduino timer

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