The card early education machine recognizes letters or other content by encoding infrared light. The encoding is achieved by emitting fixed frequency infrared light, emitting infrared light of a predetermined wavelength, adding a filter, and setting the first digit of the card position recognition area as a white bar. These four methods are combined to avoid misidentification. The position recognition and shift register are combined to form word information or sentence content information, which is decoded by the processor and read aloud.
By programming the controller, users can easily implement various applications including voice combinations, button triggering devices, output controls, and other gaming functions.
The plastic/PE film/paper card is printed with carbon ink, which can be detected by the touch area. With 7 sensing points, it can detect 128 single-sided cards or 56 double-sided cards. Users only need to place the card in the groove for automatic recognition, without the need for button recognition, and can directly touch the card to trigger sound or game.
