In every flyback diode setup I see, the relay coils are on the drain side of the transistor (if my terminology is wrong, I mean the top), so the flyback diode sends current back toward the power source. I'm curious if it can also be setup like this, with the load and flyback on the "grounded" source side of the transistor. I think it should work, but I'm not sure. As an aside, how would I test this for myself?

[![Diode on ground side of transistor](https://i.stack.imgur.com/sIcxI.png)](https://i.stack.imgur.com/sIcxI.png)