Hello all. I am trying to use a mosfet as a high power switch. I have an arduino nano pin controlling the gate of the fet. I am using an NTE2374 mosfet. I am using a typical circuit: I also have the gate connected to the source (ground) so that when the gate is not HIGH, it isn't floating. I have been testing this circuit on two separate components; main component (the valve) and also on an LED (not sure if this is a good idea). I have found the following things to happen: When the arduino pin output is LOW and the component is either a valve of LED, the component was off (as it should) When the arduino pin output is HIGH the LED turns on. When the arduino pin output is HIGH the valve does NOT turn on and the voltage reading on my dc power supply goes from 15V down to zero in a moment. I have been at this for a couple of days and I can't seem to figure out what the problem is. Can anyone help me out or direct me towards the correct path? Thank you.