To read the document, go here:
Teensy-Audio-Piezo-Input.ipynb
It's a Jupyter notebook, but GitHub will automatically render it in a few seconds.
Why am I using this weird format? Am I using GitHub and Jupyter for my blog? Yes, exactly. GitHub is a great free hosting service, and lets me use git for revision control. I can edit my stuff on my local computer, and push it up to GitHub when I'm done.
Jupyter? It provides markdown, including inline equations and code, which are useful for some of my articles.
So, it's just a little bit awkward for you, dear reader, but quite convenient for me.