The Arduino sensor shield allows us to easily plug and play servo motors, sensors and other devices. Rather than making a single connection from the pins of the Arduino Mega 2560 (found in Lesson 03) to a breadboard, we can use a sensor shield.  
The numbers that were shown previously on the Arduino board are shown above but in a different format.  Rhe sensor shield reorganizes the pins into groups of 3-pin headers.  
  • G = Ground
  • V = Voltage
  • S = Signal
For the Hobby Hand, we use analog pins A0 - A9 for the potentiometers.  We use PWM Pins for the servo motors.  Additional sensors can be integrated while using the Hobby Hand.  A separate bluetooth module and even SD Card reader can be attached to the sensor shield as well!
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