Hello, I'm trying to control a proportional solenoid valve to control air flow using an Arduino. I was intending to use a ULN2803 controlled by a PWM output to operate the valve, but I can't get the valve to open at all. It's this valve here: McMaster-Carr
I tried hooking it to a 5v 4A power supply, and also my benchtop power supply at 10v, but nothing. No current drawn, can't blow air through it.
Does it need to be driven with PWM, or should hooking up a continuous power source, as I have done, open the valve? I have tried two different valves and also reversed the wires, but I don't think it is polarized so I'm at a loss. Is there something else simple I'm missing here?
Thanks for any advice.