I am using the following sensors for an rocket project utilizing an Arduino Uno for stage separation and parachute deployment. I was planning on having an Arduino Uno powered through a 9V battery, and was wondering how long this setup would last. I don't want to lose power before the launch, while the sensors are not on sleep mode, and certainly not during flight which may last 90 seconds.
Both of these support I2C and can connect to analog pins 4 and 5 on the Uno, and can be powered with 3.3V. My other question is, can I put them on an a rocket electronics bay with an Arduino without a mux board? The mux would be fairly large to accommodate.
MPL115A2 Pressure Sensor Current Draw: 5uA during active mode 1uA during sleep mode Range: 2.4V-5.5V (can use with 3V or 5V microcontroller)
ADXL345 +-16g max rating Accelerometer Current Draw: Ultra Low Power: 40uA in measurement mode, 0.1uA in standby@ 2.5V Range: 2.0V-3.6V