So I'm trying to control an RGB LED strip, but what I didn't plan on, was that the strip would be common ground, rather than common positive.
Using a mosfet is cake when set up as common-source. You only need a couple volts above ground to switch it completely on.
But as common-drain, powering a 12v strip, that would mean I would need 12v PLUS the G-S voltage to fully saturate it. So controlling it with a simple 5v signal is out of the question.
I figured I could do a gate-bias circuit, but that would only really be good for signal amplification, rather than switching applications. Because you would either have a DC offset, or you could add capacitors, which would keep you from using it in the on state.
So how are normal common-ground devices normally switched?
Edit:: PNP TRANSISTORS. facepalm God, I'm an idiot. I can't delete this post.