You can do a lot with output devices in robotics projects, but the possibilities become endless when you add inputs. Whether they are user-controlled inputs, such as buttons and potentiometers, or environmental sensors that measure things such as ambient light or air quality, input devices can add a new dimension to any robotics project.
Using inputs in robotics projects
Digital versus analog input
Much like with digital and PWM output, there are two types of input devices: digital and analog. Digital inputs are either on or off: buttons are a prime example of this. Analog inputs give a different level of voltage of signal depending on what they are sensing; a photoresistor, for example, puts out higher voltage signals when...
