I'm trying to design a circuit that will be running from a battery. I'm currently working on the part that detects the voltage and came across this question (and answers) here:
It made pretty good sense and I figured I'd do a combination of the first and last answers. However, I had a question regarding the first circuit that was presented. Here's an image of the provided answer
Basically a P Channel FET is enabled by the MCU through the BC547.
I wondered if I could re-draw the schematic using a N Channel FET in instead of the BC547. (so that I would have a lower current draw) I then wondered if I could just use the 2 of the N Channel FETs instead to hopefully reduce my number of different components.
Both of the simplified schematics are labeled below. I was wondering if anyone with more knowledge could chime in and either say to use one or the other. Or if there was something I was overlooking and I should stick to the original P Channel and BC547 design?
Also, I'm assuming in this schematic the the MCU can hold the pins low (if not I'll add a pull down resistor to the MCU output pin)
Thanks in advance!