I need to create a switch to power on or off a moisture sensor. PIN 10 is HIGH or LOW to trigger either the transistor or the PMOS
My sensor consume about 0.6mA Moisture sensor information
My circuit work with 3.3V
Keeping in mind my circuit work with 3.3V, powered by the 3.3V pin of my micro-controller
Now my question; I have pain to make a choose between the NPN and PNP transistor and the P NOSFET example. What would be the best as far as I know, the transistor work with Ampere and PMOS with voltage.
First, if I opt for the two transistors, how can I calculate the resistance values for a 3.3V circuit. The output of the PIO I/O has 3.3V, of course.
Lastely, if I choose the P MOSFET proposition, How can I calculate the value of R1 if I have a circuit of 3.3V.
Keep in mind that my sensor must have 3.3V at the VCC sensor pin.
I heard that PMOSFET is not suitable because it's work with higher voltage, but I know there is PMOFSET for 5 and 3.3V. What is your opinion?
What would be the best choose and best values for the resistances?
Many Thank a lot for you clarification, Cheers