added fan system

Added Voltage Divider to PowerPCB for stepping down AUX voltage before outputting it to STM

Added Multisim File for testing Fan Circuitry and MOSFET spice models

Added test PCB to test simulator

more fan changes

created PlatformIO project

Added Fan Testing Circuit

Merge branch 'master' of https://github.com/solarcaratuva/PowerSystem

Added Fan Components

Update README.md