Power Mosfet cut out peripheral devices
Your current schematic will not work, you have the FET drain connected to VDD and the FET source connected directly to ground. In this use case, the FET acts like a switch when it is "on", so you will just be shorting your 5V rail to ground (sort of, it would probably stick somewhere between 5V and GND until something smoked).

What you want to do is something like this:







simulate this circuit &ndash; Schematic created using CircuitLab

The NFET will turn on like a switch when the gate voltage is sufficiently high enough. When it is on, current will be able to flow through the sensors, thus powering them.