Send less current to male the more power efficient circuit

[Vizitator bert allen]

Not preferably opamps, I need to use the ultra low current IC package which is will operate on 9v easily. I want to give much lesser in inputs and through amplification, I need to give the proper current supply to my ESP12 board using 3.3 volts, also the 9v bettery is also connected to MPU6000 operating on 5v any suggestions to make the circuit power efficient will be much helpful.

[nico_2010]

Hi,

In this case Google is your friend!

Check this: http://henrysbench.capnfatz.com/henrys-bench/arduino-projects-tips-and-more/powering-the-esp-12e-nodemcu-development-board/