One of the interesting things about the Selectric is that it contains a mechanical digital-to-analog converter .. a Whiffletree mechanism. https://www.youtube.

One of the interesting things about the Selectric is that it contains a mechanical digital-to-analog converter .. a Whiffletree mechanism. https://www.youtube.com/watch?v=bRCNenhcvpw https://www.youtube.com/watch?v=bRCNenhcvpw