This guide only scratches the surface of Fourier transform applications. You might consider more applications such as:
- Audio filtering, the CMSIS-DSP library actually has built in functions for applying filters to remove and enhance audio frequencies.
- Building an instrument tuner which detects how far an audio signal is from a reference frequency. Add sound synthesis to even create an auto-tune device!
- Radar--the Fourier transform and frequency analysis is used extensively in radar systems. Check out this talk on building a radar system at home!
- Analyzing the frequency of signals from other sensors such as accelerometers, light sensors, pressure sensors, temperature sensors, and more.
Can you think of more interesting applications?