The card recognition principle of the little genius early education machine, the card looks like paper, is there a chip in it, or is it different from the hole on the side? Why should it be inserted?
It is identified by the number of holes. You can use a piece of hard paper and make holes in it into the shape of a card. Inserting it is also the content of that card. However, according to the number of holes and sorting, it seems that there are only more than 600 * * *, so the literacy and emotional intelligence 2 at the back is directly inserted into the memory card without a card. Genius x2 uses photoelectric recognition and black stripes with different widths to solve this problem.