SunFounder GalaxyRVR Kit for Arduino, Release 1.0
If you guessed that the motor would not spin, you are correct! But why is that so?
The answer lies in the current output of the Arduino board. The signal pins on a typical Arduino board can output only
about 20mA of current, which is insufficient to drive a motor.
So, how can we control motors using our Arduino? This is where a crucial component comes into the picture - a motor
driver. Think of a motor driver as a bridge between the Arduino and the motor. It takes the low-current control signal
from the Arduino, amplifies it, and sends it to the motor, thus enabling the motor to spin.
36 Chapter 3. Course Mode
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