I'm trying to figure out how create a variable power solenoid. I want to be able to make it actuate really hard or really soft. I don't really know what I'm doing but I thought that maybe I could vary the current using a femtobuck. It probably won't work though because is seems like it must be figuring out how much current to deliver based on the LED it's hooked up to. It seems like it would have to to be able to drive various LEDs without having to tell it how much current to deliver.
Assuming the femtobuck won't work, what would be the most efficient way to vary the power to a solenoid?
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