Users Manual

CLASS 2
116
Intro to Analog
What is an analog?
Analog vs digital
We know that ‘true’ and ‘false’ show whether the button/brightness sensor is on/dark or off/bright. This tells us
only if it is on or off, so we called it digital output.
Analogs were used mostly when computers were more expensive and not as popular. Now, for example, the
music we listen to now with smartphones are available due to digital technology. Many ‘0’s and ‘1’s show that it’s
digital.
In this lesson, we will learn about analog values using the brightness sensor and the volume sensor.
But in real world, the object is not just ‘bright’ or ‘dark’. There are different amounts of brightness. Now, the
brightness sensor can show the ‘analog output’ value. This shows a number to indicate how bright it is instead of
just saying ‘true’ or ‘false’.