We will use an MPX5100A-ND analog pressure sensor to detect atmospheric pressure at the payload's location during its flight. This pressure sensor sends a voltage corresponding to pressure to the Arduino, and should be supplied with 5V.
We used the setup below to test out pressure sensor. We created code that would read in a voltage from pin A0 repeatedly. The datasheet provided for teh MPX5100 series gave a function to interpret the voltage as a real pressure, which when applied, gave us a reading of 99 KPa, close to the 1 atm expected.
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