[YmMot]

I remember putting together a mag-stripe reader with old tape heads based on schematics/code in Phrack (or maybe 2600...been awhile). At the time, tape decks were found in almost every home, while (to me) a mag-stripe reader was exoctic. Seems we've come full circle. Actually IIRC the older Square reader (which seems to be the one in the video) is literally a tape head wired to a 1/8 jack aligned to read track 2.