CN203133750U

CN203133750U - Music computer keyboard

Info

Publication number: CN203133750U
Application number: CN 201320010611
Authority: CN
Inventors: 杨云; 贾军锋
Original assignee: Shaanxi University of Science and Technology
Current assignee: Shaanxi University of Science and Technology
Priority date: 2013-01-09
Filing date: 2013-01-09
Publication date: 2013-08-14
Anticipated expiration: 2023-01-09

Abstract

The utility model provides a music computer keyboard comprising keyboard buttons and a single chip microcomputer connected with the keyboard buttons, and the single chip microcomputer is connected with an audio output module. The music computer keyboard can generate corresponding voice frequency while the buttons are hit. The music computer keyboard not only is simple in structure but also enriches functions of the keyboard, and the music computer keyboard is particularly suitable for being used by people having visual impairment.

Description

The music computer keyboard

Technical field

The utility model belongs to field of embedded technology, is specifically related to a kind of music computer keyboard.

Background technology

The technology of single-chip microcomputer is very ripe, and the technology aspect making miniature electronic qin is also ripe, and the fast development of science and technology makes that the cost performance of single-chip microcomputer is more and more higher, and it is abundant that function also is tending towards.Single-chip microcomputer is used widely in built-in field.

Existing keypad function is comparatively single, only can send the sound of keyboard mechanical friction and collision when user's key tap is carried out the character input, is not suitable for the people that vision disorder is arranged and uses.

The utility model content

The purpose of this utility model is to provide a kind of music computer keyboard.

For achieving the above object, the utility model has adopted following technical scheme:

Comprise keyboard and the single-chip microcomputer that links to each other with keyboard, described single-chip microcomputer links to each other with the audio frequency output module.

Described keyboard comprises for the button of input alphabet and the button that is used for input digit.

Described single-chip microcomputer is AT89S51.

Described audio frequency output module comprises hummer.

Described audio frequency output module also comprises note amplifier, and note amplifier links to each other with single-chip microcomputer and hummer respectively.

Described note amplifier is LM386.

The beneficial effects of the utility model are embodied in:

Music computer keyboard described in the utility model can produce corresponding audio in key tap, not only simple in structure, and has enriched the function of keyboard, and the people who is particularly suitable for vision disorder uses.

Description of drawings

Fig. 1 is structured flowchart of the present utility model;

Among the figure: 1 is keyboard, and 2 is single-chip microcomputer, and 3 is the audio frequency output module.

Embodiment

The utility model is described in further detail below in conjunction with drawings and Examples.

Referring to Fig. 1, the utility model comprises keyboard 1 and the single-chip microcomputer 2 that links to each other with keyboard 1, and described single-chip microcomputer 2 links to each other with audio frequency output module 3; Described keyboard 1 comprises for the button of input alphabet and the button that is used for input digit; Described single-chip microcomputer 2 is AT89S51; Described audio frequency output module 3 comprises hummer; Described audio frequency output module 3 also comprises note amplifier, and note amplifier links to each other with single-chip microcomputer 2 and hummer respectively; Described note amplifier is LM386.

Principle of work of the present utility model:

The utility model is with reference to the principle of work of existing mellotron button, the user knocks computor-keyboard pushbotton and is equivalent to trigger the respective electronic piano key board, the trigger pip that produces passes to single-chip microcomputer 2 and handles the corresponding sound signal of back generation, sends the sound of respective frequencies after audio frequency output module 3 is handled.

Embodiment

A kind of music computer keyboard is used interrupt system and timing (TH0/TL0) principle control hummer sounding in the design, different notes is the vibration generation by corresponding frequencies.Note in these music is realized with the Single Chip Microcomputer (SCM) program language respectively.

The table of comparisons of table 1 note frequency and count value T

The value of T has determined the value of TH0 and TL0, and its pass is: TH0=T/256, TL0=T%256.

By control single chip computer AT89S51 timer internal, make the signal of its output fixed frequency, via the sound of note amplifier from loudspeaker generation fixed frequency, the technology that this single-chip microcomputer is made Simple Electronic Organ is very ripe then.Specifically can reference table 1 to the setting of T0 timer T value.

With 36 main in keyboard buttons (in the keyboard with 26 alphabetical corresponding key and with 10 digital corresponding key) matrix keyboard mode with 8 * 5 links to each other with the P2 mouth with the P1 mouth of single-chip microcomputer, adopts line scanning mode cycle detection commonly used to get final product.The audio frequency output module adopts the output signal of the single-chip microcomputer of note amplifier LM386 to amplify the output of processing back in order to increase the audio of exporting.

Adopt independent voice module sounding for space bar commonly used and enter key.In view of people have at least 1 second dead time after using space or enter key, it is feasible fully during this period of time to play the shelf tympanitic note.

The scheme feasibility analysis:

1. it is feasible fully that power pack adopts the USB power supply of common keyboard, and easily;

2. in the importation, the matrix keyboard of single-chip microcomputer replaces with 36 buttons of computor-keyboard, adopts ripe mellotron manufacturing technology to realize computor-keyboard to the control of different frequency audio frequency output, and is feasible fully;

3. on the cost problem, in actual production, the circuit production cost of single chip part can not surpass 20 yuan, and small-sized " frame drum voice module " cost of customization is less than 5 jiaos.

The scheme effect: the blind person listens force rate ordinary person well a lot.If in computor-keyboard, the enjoyment in the time of not only can increasing input information makes the keypad function variation with music " embedding ", and the blind person can grasp the use to computor-keyboard better by to the distinguishing of alternative sounds.

Claims

1. music computer keyboard, it is characterized in that: comprise keyboard (1) and the single-chip microcomputer (2) that links to each other with keyboard (1), described single-chip microcomputer (2) links to each other with audio frequency output module (3).

2. according to the described a kind of music computer keyboard of claim 1, it is characterized in that: described keyboard (1) comprises for the button of input alphabet and the button that is used for input digit.

3. according to the described a kind of music computer keyboard of claim 1, it is characterized in that: described single-chip microcomputer (2) is AT89S51.

4. according to the described a kind of music computer keyboard of claim 1, it is characterized in that: described audio frequency output module (3) comprises hummer.

5. according to the described a kind of music computer keyboard of claim 4, it is characterized in that: described audio frequency output module (3) also comprises note amplifier, and note amplifier links to each other with single-chip microcomputer (2) and hummer respectively.

6. according to the described a kind of music computer keyboard of claim 5, it is characterized in that: described note amplifier is LM386.