Digital and Analog Signals

TODO

Digital signals represent data as discrete binary values (0s and 1s). Analog signals represent data as continuous waves of varying amplitude or frequency. In the case of a micro:bit, an analog signal can be within the range of 0 and 1023 or between 0 and 255 (in certain circumstances).

Possible plots for digital and analog signals are displayed below:

TODO:ADD MORE DETAIL

Checkpoint: Digital or Analog Signal

Consider the following inputs:

A: A button

B: A temperature sensor

C: A light-level sensor

D: A switch

Are the inputs above examples of a digital or an analog signal?

Click here to reveal the solutions.

Solutions: A: Digital. A button only has two values.
B: Analog. A temperature has more than two values.
C: Analog. A light level sensor has more than two values.
D: Digital. A switch only has two values.