Use the microphone do determine a Doppler shift from a given base frequency. Continue reading “Doppler effect”
Archives: Experiments
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Measure the speed and travelled height from within an elevator using the pressure sensor.
Continuously determine the frequency recorded by the microphone and plot a history of this frequency over time.
This just gives the raw data from the phone’s gyroscope, which is a rotation rate in rad/s.
Measure the inclination of a plane.
The experiment “Light” just gives the raw data from the phone’s ambient light sensor.
The experiment “Location (GPS)” just gives the raw data from the phone’s GPS sensor.
The experiment “Magnetic field” just gives the raw data from the phone’s magnetometer. On most phones you can switch between calibrated and uncalibrated data in the menu.
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Set up a bunch of magnets as marker, so you can use this experiment to measure the speed and distance while moving along these magnets.
Calculates and displays the FFT of magnetometer data. The strongest frequency is given as well.