Instructions

GETTING STARTED
Before we start the Python programming, let's take a look at the Air Quality Board.
The power indicator LED in the top left, provides a quick check that the board is
receiving power. Below this is a temperature sensor chip, and next to this is the
eCO2 sensor chip itself. If you look closely at it, you will see that it has tiny holes for
the air to get in and out.
Directly beneath the eCO2 sensor is a buzzer, that you can turn on and off from
your programs. This is useful for providing alarms.
The column of six LEDs is made up (from bottom to top) of two green LEDs, two
orange LEDs and two red LEDs. These will light when the level of eCO2 marked
next to each LED is exceeded. They will show the level as soon as the Raspberry
Pi powers up, but you can also control them using Python.
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