Hey Everyone,
So, I built a circuit and everything was working very well. I was using a MOSFET as a switch. However, I was not happy with my design, because I was "swtching" ground. Effectively, I had two ground busses. One on the drain, and one on the source completely isolated. I didn't think this was really what I wanted to do, or was what anyone did.
So, I thought it, and rewired it so that I had two separate VCC busses instead. This seemed to make a lot more sense. Ground is ground everywhere on the circuit, and when the MOSFET is switched, it will connect to the two VCC busses.
The problem I ran into with this change is that now the MOSFET, even though the gate is low (I just added a resistor to pull it to ground), both the source and the drain are have ~5V.
I included a before and after.
So, I built a circuit and everything was working very well. I was using a MOSFET as a switch. However, I was not happy with my design, because I was "swtching" ground. Effectively, I had two ground busses. One on the drain, and one on the source completely isolated. I didn't think this was really what I wanted to do, or was what anyone did.
So, I thought it, and rewired it so that I had two separate VCC busses instead. This seemed to make a lot more sense. Ground is ground everywhere on the circuit, and when the MOSFET is switched, it will connect to the two VCC busses.
The problem I ran into with this change is that now the MOSFET, even though the gate is low (I just added a resistor to pull it to ground), both the source and the drain are have ~5V.
I included a before and after.
