Ok I'm adding a circuit because at least somebody is confused:
As you can see, the microcontroller is powered with 3V.
For the purposes of my question, the details of the internal functionality of the micro as well as the wireless data content are irrelevant.
What is known is that one pin of the microcontroller will be made as output and will control when the entire radio module goes on and off.
Yes I am completely aware than an enable input exists as well but because the radio module gives me bad luck (I suspect someone programmed it wrong), I'm going to use every line of that radio module available to me including the power pin.
In this circuit I will be able to turn the module on and off, but
the problem is that
this circuit wastes alot of current when the microcontroller turns the power to the module off especially with the 50 ohm collector resistor.
If I remember transistor operation, then when the pin feeding the base goes high, then current goes from collector to emitter which means the 50 ohm resistor is connected from VCC to ground which means 3/50ths of an amp of current is wasted for nothing.
I want to avoid wasting this current.
Any way I can pull it off? I'm not sure if totem pole could help here. hmm..