Combined microphone for teaching based on radio frequency technology

Abstract

The invention relates to the technical field of teaching appliances, and especially relates to a combined microphone for teaching based on the radio frequency technology. The combined microphone for teaching comprises a combined microphone and a microphone seat. The combined microphone comprises a microphone. A microphone head is connected with a first input terminal of an analog switch through a microphone amplifier. The output end of an MP3 module is connected with a second input end of the analog switch. The output end of the analog switch is connected with an FM (frequency modulation) output circuit through an electronic potentiometer. The analog switch and the electronic potentiometer are connected with a microprocessor. The microprocessor is connected with a laser transmitting control circuit and a keyboard circuit. A signal modulation circuit with 38K carrier waves, an infrared transmitting tube driving circuit and a driven infrared transmitting tube are connected with one another. The microphone seat is provided with a flat microphone insertion hole for fixing the combined microphone. The combined microphone is suitable for explanation and demonstration in multimedia classrooms and general classrooms, overcomes a rigid teaching mode in which teachers are bound to a multimedia console, enables teachers to put most of energy into teaching, and can effectively improve the effect of teaching.

Description

technical field [0001] The invention relates to the technical field of teaching appliances, in particular to a combined microphone for teaching based on radio frequency technology. Background technique [0002] At present, multi-functional conference rooms, lecture halls and multimedia classrooms are generally equipped with computers, projectors, public address systems and other equipment, and each device is equipped with its own remote control. Moreover, due to differences in brands, models, and manufacturers, wireless microphones , laser pointer, and remote control are not interchangeable for a single device. This makes the operation complicated when using these devices, and it is necessary to alternate between various remote controls, microphones and audio playback. Even if a central control device is installed, it only solves some simple operations, such as switching power supply, program content switching, etc., and cannot realize seamless unified control, use and swit...

AI Technical Summary

Problems solved by technology

[0002] At present, multifunctional meeting rooms, lecture halls and multimedia classrooms are generally equipped with computers, projections, public address systems and other equipment, and each equipment is equipped with its own remote control , and, due to different brands, models, and manufacturers, wireless microphones, laser pointers, and remote controls cannot be interchanged for a single device

This makes the operation complicated when using these devices, and it is necessary to alternate between various remote controls, microphones and audio playback

Even if a central control device is installed, it only solves some simple operations, such as switching power supply, program content switching, etc., and cannot realize seamless unified control, use and switching of all devices

In terms of wireless microphones, laser pointers, electronic speech switching, projection and PA equipment adjustments, it is still necessary to use their own devices and remote controls separately, which is very inconvenient to operate

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