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I would like to know how to control this specific proportional valve with arduino. The valve operates with a constant 12V and driven by current of a range of 0-170mA.

Could you help me with what components and circuit diagram I would require to operate this valve and

I have tried to PWM a mosfet (IRF520N) in which the output of the mosfet was connected to the valve. I also had 12V coming straight from a power supply however I didn't got it to work.

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  • \$\begingroup\$ Show the circuit you used (all the circuit). \$\endgroup\$ – Andy aka Jul 29 '20 at 16:07
  • \$\begingroup\$ @Spehro Thanks mate, will give it a go and let you know how it goes. One question you know on V2 Square, would that be the PWM pin on the board. Also, how would you control the current. I am assuming that it would vary depending on the duty cycle of the PWM signal. \$\endgroup\$ – John Jul 30 '20 at 8:25
  • \$\begingroup\$ I've converted this to a comment. Spehro's answer explains how to obtain current control. Read it for understanding of how it works. (A controlled variable voltage across an R results in cmtrolled I as I = V/R) \$\endgroup\$ – Russell McMahon Jul 30 '20 at 9:46
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I think if you use the circuit in my answer here it will work for you.

Replace R1 with 2.7 ohms and replace the S8050 with a TIP122 with a small heatsink.

Of course the 3.7V becomes 12V and the 68 ohms represents your valve. Put a diode across the valve, such as 1N4148.

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