Controlling a valve with 0-6 V regulation

Projects General Guidance
41

I guess it's a little confusing.
You can't control a current without varying the voltage and you can't control a voltage without varying the current. However for most solenoid type valves, the relationship between current and valve position may be close to being very linear (proportional) as shown in that little graph in the datasheet.

With PWM you basically control the average voltage and thus also the average current, however you may find that the relationship between PWM duty cycle and valve position may not be as linear (proportional) as current control. You may need to do a little experimenting to find what PWM values result in what valve position.

42

Thank you! I will definitely have a look at this as well. It is cheaper for me to invest in Jims solution since I already have most parts so I think it make sense to start there

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43

Or feedback from the driver to the µC. Here is the right place for a low pass filter.

44

I have just received the valve. It is a 2-wire valve but both wires are black with no markings. I will figure out the connections and try the solutions mentioned here.

45

Unfortunately, this does not actuate the valve

46

I have managed to successfully control the valve using this circuit. Thank you very much!

47

You are welcome.
Have a nice day!

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