A Beaglebone Black Rev C is used for powering the payload sensors. The senosrs include a barometer, accelorometer, magnotometer, and thermister.
We are using the ADXL335 3-axis accelorometer with breakout board. Two 470 kOhm resistors are used for each axis output pin. This serves the function of halving the output voltage, since the Beaglebone Black can only read up to 1.8 V in it's analog pins. In addition, the accelorometer has an internal 32 kOhm resistor and we didn't want the entire voltage drop in the accelerometer.
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