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

Sections

[{
  "name": "Analog to digital",
  "description": "Learn about converting an analog signal into digital numbers.",
  "url":"/learnsystem/pins-tutorial/analog-input/analog-to-digital",
  "imageUrl":"https://pxt.azureedge.net/blob/3bf9c3187bf55a7a9e9f4b2dc923f46faea1fb44/static/cp/learn/pins-tutorial/analog-input/analog-digital-thumb.jpg"
}, {
  "name": "Read analog",
  "description": "Read various voltages on a pin.",
  "url":"/learnsystem/pins-tutorial/analog-input/read-analog",
  "imageUrl":"https://pxt.azureedge.net/blob/92542f9d7ad94d2cd1e3070d86d8858d1bae7af0/static/cp/learn/pins-tutorial/analog-input/read-analog-thumb.jpg"
}]