Pen color recognition device for electronic blackboard
A recognition device and electronic blackboard technology, applied in the field of color recognition, can solve the problems of misrecognition of recognition rate, high misjudgment rate, and difficulty in realization, and achieve the effects of low misjudgment rate, easy processing and manufacturing, and simple structure
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[0023] The pen color recognition device used in the electronic blackboard of the present invention includes a magnet, a reed switch induction circuit, and a processing unit. The processing unit specifically adopts WINBOND 8-bit single-chip microcomputer W77LE516. The writing pen is provided with at least two positions for placing magnets. The writing pen used in this embodiment is provided with three positions for placing magnets (distributed along the center line of the writing pen), represented by 1, 2, and 3. The four writing pens used are The pen is set to four colors according to the needs, and the placement of the magnet in the writing pen is as follows: Figure 1a , Figure 1b , Figure 1c and Figure 1d as shown, Figure 1a The middle magnets are placed in positions 1 and 2, Figure 1b The middle magnets are placed in positions 1 and 3, Figure 1c The middle magnet is placed in position 1, Figure 1d The middle magnets are placed at positions 1, 2, and 3, and the p...
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