Arduino sinuoidal waveform generator and signal capture

I have put together an example on how to use the Arduino nano as a signal generator and digital capture device. It runs a pretty low sampling rate 2 kHz but I thought it might be of some use. Check out a video explanation at  https://youtu.be/_31sQn1Cg9g.  Files used are available at http://pzdsp.com/shared/arduino_sin_gen.zip

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