I don't know why people, like you, feel it's necessary for a hobbyist to learn engineering to be able to build a simple circuit.
Ha, I have been playing with a p40NF0 all morning. By playing with it I mean I've been picking it up and trying to figure out if it would be right. I think I have a few of these laying around.
THis is all still theory because I don't have the correct transistor in my possession yet.
No, the transistor turns on when the Gate goes positive.You cannot source current from an N channel MOSFET.When did we start talking about cars?Come again???
The transistor I was "playing with" is different than the one I put in my drawing.
Then some people come in and call me a fool (not in so many words).
If I wanted to switch the negative then it's not an issue. But everything I'm working on is built around a positive 5V digital output from the arduino.