With his project, a 3-axis Open Source FFT Spectrum Analyzer he is not only entering the Hackaday Prize 2016 but also the highly contested field of acoustic defect recognition.

If you’ve ever wanted to make your own VU meter but were scared off by the signal process you need to study this tutorial. Hackaday Alum [Phil Burgess] developed the device using an RGB LED m… ...

Okay, so what we are going to make is an Arduino Nano based device that can generate “real” and “imaginary” data (I and Q samples) per your settings of frequency, amplitude, ... Figure 4 Real FFT ...