CN202142304U - Electronic message board - Google Patents

Abstract

The utility model relates to an electronic message board, and solves the problems that the resource is wasted, garbage is generated, inconvenience is caused, and even a note is lost or the identification of a person leaving the message is suspicious when a paper note is used for leaving messages before. The electronic message board comprises a casing (1), wherein a function control switch is arranged on the casing, is connected with a state indication circuit (2), a voice recording and playing circuit (3) and an audio amplification circuit (4) respectively, and comprises a pause key (5), a reset key (6) and a record and play switching key (7); the voice recording and playing circuit comprises an ISD2500 voice memory chip; and the audio amplification circuit comprises an LM386 audio amplification chip. The electronic message board is used for recording and playing messages.

Description

Electronic message leaving is thin

Technical field:

It is thin that the utility model relates to a kind of electronic message leaving.

Background technology:

along with the continuous progress of social civilization, and paperless office, low-carbon (LC) life are causing people's attention gradually, and live and work under environmental protection and energy-conservation environment has become the target that people pursue.

We run into the situation that will give household or colleague's message through regular meeting in routine work and life, also have some units, like hotel guest when withdrawing from a room, to waiter's prompting.It all was mode with the papery note in the past.So not only waste resource, produce rubbish, also can be very inconvenient, even can note lose or to message people's situation about truly throwing doubt upon.

Summary of the invention:

The purpose of the utility model is that the problem that is directed against above-mentioned existence provides a kind of electronic message leaving thin, adopts the electronic module stored voice message.Message is arranged respectively and play pilot lamp as the existing duty indication of this device.Can record repeatedly put, recording playback and remove a key and settle, simple to operate, use and convenient, greatly convenient to the live and work band.

Above-mentioned purpose realizes through following technical scheme:

electronic message leaving is thin; Its composition comprises: housing; Have function control switch on the described housing, described function control is connection status indicating circuit, audio record circuit and audio amplifier circuit respectively, and described function control switch comprises Pause key, reset key and recording playback shift key; Described audio record circuit comprises ISD2500 voice storage chip, and described audio amplifier circuit comprises that the LM386 audio frequency amplifies chip.

Beneficial effect:

1. the utility model replace traditional paper information carrier with digitized electronic storage device, replace the literal message with the sound message.There is pilot lamp to remind message or message to read respectively.Passive message is become remind of the message initiatively.

What the recording module of the utility model adopted is that anti-outage, tonequality are good, and recording playback time 60--120 second, the ISD2500 chip of American I SD company is as information storage chip.Repeated taping can reach more than 100,000 times.This device adopts LM386 to amplify chip as audio frequency, can guarantee to play sound clarity, the fidelity of voice.

Description of drawings:

accompanying drawing 1 is the structural representation of the utility model.

accompanying drawing 2 is circuit theory diagrams of the utility model.

Embodiment:

Embodiment 1:

are shown in accompanying drawing 1; Electronic message leaving is thin, and its composition comprises: housing 1 has function control switch on the described housing; Described function control is connection status indicating circuit 2, audio record circuit 3 and audio amplifier circuit 4 respectively; Described function control switch comprises Pause key 5, reset key 6 and recording playback shift key 7, and described audio record circuit comprises ISD2500 voice storage chip, and described audio amplifier circuit comprises that the LM386 audio frequency amplifies chip.

Principle of work:

Shown in accompanying drawing 2:

Recording Process: as K1, when K2 is in off-state; 3 pins of K3 connect at 1 o'clock, promptly insert high level in the loop, and this high level signal is when 27 pins that trigger IC2 begin to record; Road through VD1 and C2; Trigger 3 pins of rising edge d type flip flop IC1, make output terminal Q, the upset of d type flip flop, LED1 is bright, LED2 does not work.This state remains to till the broadcast of this information always.IC2 is begun to receive the voice signal of the microphone that connects from 17,18 pins by the control of the high level of 27 pin, and begins storage at the address location of appointment, up to the noble potential disappearance of 27 pin, accomplishes Recording Process.

playback process: as K1, when K2 is in off-state; 3 pins of K3 connect at 2 o'clock, promptly insert low level in the loop, and 27 pins that this low level signal triggers IC2 begin playback; At this moment; VD1, R3 and C1 place the last point in road be low level, the base stage of triode VT1 is an electronegative potential also, VT1 ends; Current collection noble potential very then; Through VD2 and C2 once more high level trigger 3 pins of rising edge d type flip flop IC1, make the output terminal Q of d type flip flop, upset LED1 not work, LED2 is bright.The voice that indication is recorded are play, and this state remains to till the recording beginning next time always.During playback, IC2 is through 14 pin output audio signals, and signal after the amplification of LM386 audio frequency amplification chip IC 3, obtains desirable speech sound at the BL loudspeaker through the adjustment of BP.

for playing Pause key, K2 is that recording signal is removed the memory unit address reset key.This two key all uses under abnomal condition, can be used as the subsidiary function of this device.

Claims (1)

1. an electronic message leaving is thin; Its composition comprises: housing; It is characterized in that: have function control switch on the described housing, described function control is connection status indicating circuit, audio record circuit and audio amplifier circuit respectively, and described function control switch comprises Pause key, reset key and recording playback shift key; Described audio record circuit comprises ISD2500 voice storage chip, and described audio amplifier circuit comprises that the LM386 audio frequency amplifies chip.

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