Sign pen emission circuit of infrared electronic white board

Abstract

The invention discloses a sign pen emission circuit of an infrared electronic white board. The sign pen emission circuit of the infrared electronic white board comprises a first crystal oscillator, a second crystal oscillator, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a first infrared diode, a second infrared diode, a third infrared diode, a fourth infrared diode, a first audion, a second audion, a third audion, a fourth audion, a sign generation chip and an inductor. A writing operation is carried out through ultrasonic positioning and an infrared tracking technology, the sign pen emission circuit is strong in emission signs and stable in energy, can accurately write on the electronic white board, can avoid a misoperation brought by that a wrist enters an electronic infrared frame under a condition that the sign pen normally writes, and improves the stability, the sensitivity and the accuracy of electronic writing.

Description

technical field [0001] The invention relates to a signal transmitting circuit, in particular to a signal pen signal transmitting circuit of an infrared electronic whiteboard. Background technique [0002] The classroom is an important position in school education, and the blackboard is an indispensable tool for classroom teaching. It is used to present teaching content and organize teaching activities. Because blackboards are cheap and easy to use, blackboards have spread throughout all schools and classrooms. However, as With the continuous progress of society, the defects of the blackboard have become more and more obvious to us, so multimedia teaching has emerged as the times require. However, the projection teaching method of the large screen also has many shortcomings. The teacher cannot modify the content of the large screen at any time. The large screen The content is relatively fixed and lacks flexibility. Nowadays, interactive electronic whiteboards have appeared. ...

AI Technical Summary

Problems solved by technology

[0002] The classroom is an important position in school education, and the blackboard is an indispensable tool for classroom teaching. It is used to present teaching content and organize teaching activities. Because blackboards are cheap and easy to use, blackboards have spread throughout all schools and classrooms. However, as With the continuous progress of society, the defects of the blackboard have become more and more obvious to us, so multimedia teaching has emerged as the times require. However, the projection teaching method of the large screen also has many shortcomings. The teacher cannot modify the content of the large screen at any time. The large screen The content is relatively fixed and lacks flexibility

Nowadays, interactive electronic whiteboards have appeared. Interactive electronic whiteboards organically combine blackboards and multimedia projections. They can not only introduce and present digital information resources conveniently, but also increase or decrease content at any time according to needs. Among them, infrared electronic whiteboards are also interactive electronic whiteboards. The best among whiteboards, the teacher can use the signal pen to write freely on the electronic whiteboard, but most of the existing infrared electronic whiteboards on the market cannot achieve the precise writing effect of blackboard writing, and at the same time, when the wrist or other objects enter the range of the infrared frame misuse of writing

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