Analog input
An analog input pin can read a voltage level that ranges from the supply voltage of your board 3.3 v (3.3V) down to 0 v (GND). The value returned to your program from reading the pin is not the actual voltage value but a binary digital number that represents the input signal level.
Experiments
There are several experiments to let you test out the concepts you learn in the analog input sections. You’ll need a few things to in order to perform some of the experiments.
- (3) Alligator clip leads
- Variable resistor - use you own graphite resistor