Internet of Things (IoT)

Electrical Engineering Basics

brightlightkim 2022. 7. 25. 06:58

Voltage

  • The electric potential difference between two points
  • Produces force to move electrons
  • Measured in volts

 

  • What are the voltages reference to?
    • 9V Diff with Batteries
    • 120V Potential Diff between these two
      • Neutral
      • Hot

Ground (GND) or Common (COM)

  • References a point in an electrical circuit from which voltages are measured
  • Black = negative
  • Red = positive