CN2368128Y - Electronic speech-sound promptly-recording cyclic megaphone - Google Patents

Abstract

The utility model relates to a language instant recording loop megaphone, which realizes instant recording and instant playback utilizing a language chip and a circuit of the language chip to drive a loudspeaker, and has the loop function. The utility model is characterized in that a recording and playback loop circuit adopts an ISD1110 language chip with nine pins to be connected with a power switch, a sound playback and amplifying mode conversion switch, an electret microphone, a microphone bias resistance, and a microphone audio signal output capacitance, and to be connected with a power amplification circuit through an audio signal bias clamping capacitor and a sound volume control potentiometer. The utility model realizes sound recording without a magnetic tape, and realizes instant recording and instant playback. The utility model also has the loop playback function. The utility model can be used for sales promotion, customer acquisition, etc.

Description

Electronic speech is promptly recorded cyclic megaphone

The utility model relates to a kind of electronic speech and promptly records cyclic megaphone.

At present, commercially available megaphone majority is a kind of Music Clip of dullness and the megaphone that power amplifier is formed, or by the sound equipment that audio tape is play, promptly records and promptly do not put circulatory function.

The purpose of this utility model is to provide a kind of i.e. record promptly to put and electronic speech with circulatory function is promptly recorded cyclic megaphone.

The technical solution of the utility model is: it is made up of speech recording and reproducing cycling circuit, power amplifier and loudspeaker, and described speech recording and reproducing cycling circuit is by 9 pin ISD1110 speech chips and power switch K ₁, the playback switch K that amplifies ₃, Electret condenser microphone M1C, microphone bias resistance R ₁, microphone audio signal output coupling capacitor C ₁Connect, and by sound signal coupling capacitor C ₄, volume control potentiometer W ₂, sound signal coupling capacitor C ₅Be connected with power amplifier.

The utility model only needs wish to be expressed stated facing to microphone and gives an account of, and can record into and loop play repeatedly, and is time saving and energy saving, convenient and swift.

Fig. 1 is the utility model electrical schematic diagram

Fig. 2 is 9 pin speech chip block schemes

Be described further below in conjunction with accompanying drawing.

As shown in Figure 1, the utility model uses one of ISD1110 language chip, 6V direct supply.ISD1110 is a recording playback language circuit, and TEA2025 is a power amplifier, and two circuit are subjected to double-pole push switch K simultaneously ₁Control.K in this circuit ₃The double-pole push switch is in the playback recurrent state, K during playback ₂The hilted broadsword push switch is in off-state, and REC recording end is not worked, and LED end output pulse signal can be sent out Technitron 9015 conducting PE playback ends and be in the loop playback state, and sound signal is by SP ⁺End is sent by K switch ₃, capacitor C ₄, potentiometer W ₂, capacitor C ₅The TEA2025 power amplifier is delivered in coupling, K during recording ₂The path that closes, REC recording end is in low level, and the ISD chip circuit is in recording state, R ₃, R ₆, C ₂Do not work Electret condenser microphone R ₁Biasing resistor work, the sound signal capacitor C ₁Be coupled to chip ANAIN input end and deliver to DAST and E in the chip ²The PROM analog storage, REC end control chip internal storage carries out new recording state after 10 seconds.SP during recording state ⁺End is not worked, and K is worked as in no signal output ₂When the hilted broadsword push switch disconnected, the REC end was not worked, and is in high level, and LED begins output pulse signal, can send out Technitron 9015 conductings, made chip PE end be in the loop playback duty, and sound signal is by SP ⁺End output.R in the circuit ₂, W ₁Avoid uttering long and high-pitched sounds when propagandaing directed to communicate and carry out signal attenuation effect, resistance R ₇Be light emitting diode D ₁Limit resistance, D ₁Be the on/off pilot lamp, electrochemical capacitor C ₆Be power filtering capacitor, loudspeaker is hand-held loudspeaker.

As shown in Figure 2,9 leading foots of ISD1110 language chip are respectively: 1,5 pin are the anode of analog-and digital-power supply, 2 pin are recording control, circuit was in recording state when this end was changed to low level, 3 pin are pulse signal output end, the control triode is carried out the loop playback circuit, 4 pin are the playback control end, circuit was in tone playing state when this end was changed to low level, and 6 pin are the microphone signal input end, only need adopt general capacitor microphone in the collective during use, link to each other with this end by an electric capacity, 7,8 pin are the playback output terminal, and this end is dynamic loudspeaker directly, and 9 pin are molded and earth terminal digital power.

Claims (1)

1, a kind of electronic speech is promptly recorded cyclic megaphone, is made up of speech recording and reproducing cycling circuit, power amplifier and loudspeaker, it is characterized in that: the speech recording and reproducing cycling circuit is by 9 pin ISD1110 speech chips and power switch K ₁, the playback switch K that amplifies ₃, Electret condenser microphone M1C, microphone bias resistance R ₁, microphone audio signal output coupling capacitor C ₁Connect, and by sound signal coupling capacitor C ₄, volume control potentiometer W ₂, sound signal coupling capacitor C ₅Be connected with power amplifier.

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