Casio magnetic data cards for the Pro fx-1

[Didier Lachieze]

(04-14-2019 11:37 AM)ijabbott Wrote:  I wonder what the black stripes on the bottom edge of the card are for? They must be for an optical sensor, but what is the optical signal used for?

I suppose that these black stripes are used to generate a clock signal used to synchronize the read or write operations.