Complete code re-write plus new feature (frequency control) #3
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This pull request is to add a version 4.0 of the Arduino sketch. This is a new file, so if this pull request is accepted, the previous code will remain available and unchanged.
The new feature is the ability to adjust the base frequency using the same knob that is used for LED brightness control. The code was also re-written from scratch in the hope that it will be easier to understand for anyone wanting to make their own modifications or to leverage it for another project.
Please see the header comment for the TimeFrame_V4_0_full.ino file for details.