CN204732164U

CN204732164U - Simple and easy audio record player

Info

Publication number: CN204732164U
Application number: CN201520361321.4U
Authority: CN
Inventors: 林禹鹏
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-05-31
Filing date: 2015-05-31
Publication date: 2015-10-28
Anticipated expiration: 2025-05-31

Abstract

The utility model relates to a kind of simple and easy audio record player, include MCU microprocessor, display module, key-press module, memory module and sound and play typing module, the output signal of described key-press module is transferred to MCU microprocessor, and described MCU microprocessor plays typing module bidirectional data communication with display module, memory module and sound respectively.The utility model adopts the mode of single-chip microcomputer to realize typing and the broadcasting of audio frequency, increases external input equipment, and control and display interface, easy to operate, practicality is stronger.

Description

Simple and easy audio record player

Technical field

The utility model relates to the technical field of player, particularly be a kind of simple and easy audio record player.

Background technology

Experienced by development for many years, audio frequency manufacturing system just occurs with a kind of brand-new form being different from the traditional analog epoch completely.Make a general survey of product and the design concept of current major vendor, the technological maheup of digital audio system can be summarized as following several respects: core digital processing engine (DSP, FPGA and algorithm), software application and virtual signal route (virtual sound console, route test), outside man-machine interface (keyboard, control desk etc.), with the exchange/synergistic mechanism of heterogeneous system.And traditional recording broadcasting is made up of pure mimic channel, its unstable properties, practicality is low.

Utility model content

The purpose of this utility model is to provide a kind of simple and easy audio record player.

The utility model solves the technical scheme that its technical matters adopts: simple and easy audio record player, include MCU microprocessor, display module, key-press module, memory module and sound and play typing module, the output signal of described key-press module is transferred to MCU microprocessor, and described MCU microprocessor plays typing module bidirectional data communication with display module, memory module and sound respectively.

Further, described MCU microprocessor adopts AT89c51 single-chip microcomputer IC1.

Further, described sound broadcasting typing module is made up of ISD400408 pronounciation processing chip IC2, LM386 power amplifier chips IC3 connected successively and loudspeaker LS1.

Further, described memory module adopts 24C16 ferroelectric memory module IC4.

By adopting above-mentioned technical scheme, the beneficial effects of the utility model are: the utility model adopts the mode of single-chip microcomputer to realize typing and the broadcasting of audio frequency, increases external input equipment (audio frequency broadcasting), and control and display interface, easy to operate, practicality is stronger.

Accompanying drawing explanation

Fig. 1 is frame assumption diagram of the present utility model;

Fig. 2 is circuit theory diagrams of the present utility model.

Embodiment

The utility model is further illustrated below in conjunction with the drawings and specific embodiments.

As shown in Figure 1, simple and easy audio record player of the present utility model, include MCU microprocessor, display module, key-press module, memory module and sound and play typing module, the output signal of described key-press module is transferred to MCU microprocessor, and described MCU microprocessor plays typing module bidirectional data communication with display module, memory module and sound respectively.

Its function has: (1) sound typing, and when pressing " REC " key, system is in input function

, sound starts typing and timing, if exceed typing maximum time, and a voice message " memory space inadequate! " (2) play mode, be divided into recording to play and external audio frequency signal.When pressing play button " PLAY ", data are taken out from memory block and play.

Key-press module function has: recording, plays, and suspends, exits.Corresponding button has LED warning light, if there is button to press, which kind of state is the bright display system of corresponding lamp be in.Display module function has: (1) display voice recording time, and overtime (memory space) then shows " storing not enough ".

As shown in Figure 2, described MCU microprocessor adopts AT89c51 single-chip microcomputer IC1, and described sound plays typing module by the ISD400408 pronounciation processing chip IC2 connected successively, and LM386 power amplifier chips IC3 and loudspeaker LS1 is formed.ISD400408 pronounciation processing chip IC2 adopts CMOS technology, includes crystal oscillator, antialiasing filter, smoothing filter, automatic silencing, audio-frequency power amplifier and high density many electrical level flash storage array.The 1st, 2,3 of AT89c51 single-chip microcomputer IC1, the 1st, 2,3,4 pin of 4 pin and ISD400408 pronounciation processing chip IC2 form SPI and communicate.AT89c51 single-chip microcomputer IC1 sends play instruction to ISD400408 pronounciation processing chip IC2, and due to from IN+ pin input signal, homophase analog input (ANA IN+)-this is the in-phase input end of recorded audio signals, and input amplifier can by single-ended or differential driving.During single ended input, signal is inputted by coupling capacitance, and amplitude peak is peak-to-peak value 32mV, and the 3k Ω input impedance of coupling capacitance and local terminal determines the low-end cut-off frequency of chip frequency.When differential driving, signal amplitude peak is peak-to-peak value 16mV, therefore signal must be amplified.ISD400408 pronounciation processing chip IC2 reads data from memory block and is outputed signal by a_out pin, then the in-phase input end entering LM386 power amplifier chips IC3 carries out signal amplification, and the 5th pin output sound signal of LM386 power amplifier chips IC3 is play after filtering.

Described memory module adopts 24C16 ferroelectric memory module IC4, because the internal storage space of AT89c51 single-chip microcomputer IC1 is less, and the utility model needs to carry out process comparison and the pre-stored to some voice to each several part data, transmit through AT89c51 single-chip microcomputer IC1 for gathered data so be circumscribed with independently 24C16 ferroelectric memory module IC4, and store.

Above-describedly be only a preferred embodiment of the present utility model, the scope that the utility model is implemented can not be limited, every equalization change of doing according to the utility model claim and decoration, all should still belong in scope that the utility model contains.

Claims

1. simple and easy audio record player, it is characterized in that: include MCU microprocessor, display module, key-press module, memory module and sound and play typing module, the output signal of described key-press module is transferred to MCU microprocessor, and described MCU microprocessor plays typing module bidirectional data communication with display module, memory module and sound respectively.

2. simple and easy audio record player according to claim 1, its feature exists: described MCU microprocessor adopts AT89c51 single-chip microcomputer IC1.

3. simple and easy audio record player according to claim 2, its feature exists: described sound is play typing module and is made up of ISD400408 pronounciation processing chip IC2, LM386 power amplifier chips IC3 connected successively and loudspeaker LS1.

4. the simple and easy audio record player according to Claims 2 or 3, its feature exists: described memory module adopts 24C16 ferroelectric memory module IC4.