CN214409656U - Light voice warning effect control circuit applied to law enforcement recorder - Google Patents

Abstract

The utility model discloses a light pronunciation warning effect control circuit for law enforcement record appearance, including digital power amplifier output module, pronunciation IC control output module, red blue LED power and output module, LED button module, DSP chip and be used for confirming the DSP chip be in shutdown state with the LED button of LED button module is in the little the control unit MCU that sends red blue and explode and dodge and/or pronunciation warning signal when pressing the state. The MCU is powered on constantly so as to conveniently judge whether the DSP chip is powered off or not and whether the LED key is pressed down or not in real time. When the two judgment results are yes, the MCU selectively controls the power output of the red and blue LED power supply and the output module, the power output of the voice IC control output module and the output of the digital power amplifier output module so as to achieve the effects of red and blue flashing and/or voice warning.

Description

Light voice warning effect control circuit applied to law enforcement recorder

Technical Field

The utility model relates to a law enforcement record appearance technical field, in particular to be applied to light pronunciation warning effect control circuit of law enforcement record appearance.

Background

Law enforcement recorders are commonly known as police law enforcement recorders or field law enforcement recorders. The portable law enforcement evidence obtaining device is different from a common automobile data recorder, is portable law enforcement evidence obtaining equipment with a synchronous recording function, can timely collect and fix evidences and record the on-site handling conditions of various events, and meanwhile, the light voice warning effect of the product can effectively warn and frighten law enforcement agents in law enforcement work to enable the law enforcement agents to consciously obey the law and regulations of the state, so that important guarantee is provided for realizing justice law enforcement, civilized discipline, protecting the legitimate interests of law enforcement personnel and parties, guaranteeing the law enforcement personnel to perform the duties in law enforcement, promoting the improvement of law enforcement level and supervising the law enforcement behaviors.

Law enforcement record appearance plays important role in actual work life, specifically includes:

1. effectively collecting fixed evidences in time and restoring the true phase of an event;

2. the warning frightening law-breaking agent consciously obeys the national laws and regulations;

3. the law enforcement behavior of the law enforcement personnel is effectively supervised and standardized, and the legal rights and interests of the law enforcement personnel are guaranteed.

At present, when a law enforcement recorder meets the situation that law enforcement is needed, the law enforcement can be generally realized after a machine is started. The disadvantage of this mode is that once the machine is shut down, the red flashing indicator light, the blue flashing indicator light and the voice warning of the law enforcement recorder are all ineffective, and the effect of warning and deterring illegal actors cannot be achieved.

Disclosure of Invention

The utility model discloses a main aim at provides a be applied to light pronunciation warning effect control circuit of law enforcement record appearance, when aiming at solving among the prior art when the law enforcement record appearance is in the shutdown state, how to export red effectively and explode and dodge, blue explode and dodge and pronunciation warning signal's technical problem.

In order to solve the technical problem, the utility model provides a technical scheme does:

a light voice warning effect control circuit applied to a law enforcement recorder comprises a digital power amplifier output module, a voice IC control output module, a red and blue LED power supply and output module, an LED key module, a DSP chip and a micro control unit MCU (microprogrammed control unit) for controlling to send out red and blue flashing and/or voice warning signals when the DSP chip is in a power-off state and an LED key of the LED key module is in a pressed state; the output end of the micro control unit MCU is respectively connected with the input end of the digital power amplifier output module, the input end of the voice IC control output module and the input end of the red and blue LED power supply and output module, and the input end of the micro control unit MCU is also respectively connected with a normal power supply, a state detection signal end of the DSP chip and a state detection signal end of the LED key module; the LED key module is characterized in that the input end of the LED key module is also connected with a normal power supply, the LED key module is also connected with the DSP chip, the DSP chip is also respectively connected with the red and blue LED power supply and output module, the digital power amplifier output module and the voice IC control output module, and the digital power amplifier output module and the voice IC control output module are connected.

Preferably, the input end of the micro control unit MCU is connected to the state detection signal end of the LED key module through a diode D6.

Preferably, the LED key module is connected to the DSP chip through a diode D7.

Preferably, the light voice warning effect control circuit further includes an NPN type triode Q20, a bidirectional diode D8 and a P type MOS transistor Q19, wherein the voice IC control output module is connected to a collector of the NPN type triode Q20 through the P type MOS transistor Q19, a base of the NPN type triode Q20 is connected to an output terminal of the DSP chip and an output terminal of the MCU through the bidirectional diode D8, an emitter of the NPN type triode Q20 is grounded, and an input terminal of the P type MOS transistor Q19 is connected to a 3.3V voltage.

Preferably, the type of the P-type MOS transistor Q19 is AO3401P type MOS transistor.

Preferably, the model of the NPN type triode Q20 is 2N 3904.

Preferably, the LED key is a tact switch key.

Preferably, the red and blue LED power supply and output module comprises a red flashing light and a blue flashing light.

Preferably, the input end of the micro control unit MCU is connected to a constant power supply through the low dropout regulator LDO.

Preferably, the input end of the LED key module is connected to the normal power through the low dropout regulator LDO.

Compared with the prior art, the utility model discloses following beneficial effect has:

in this application, this be applied to light pronunciation warning effect control circuit of law enforcement record appearance, including digital power amplifier output module, pronunciation IC control output module, red blue LED power and output module, LED button module, DSP chip and be used for confirming the DSP chip is in the power off state with the little the control unit MCU of controlling the red blue flashing and/or pronunciation warning signal of sending when the LED button of LED button module is in the state of pressing. The MCU is powered on constantly so as to conveniently judge whether the DSP chip is powered off or not and whether the LED key is pressed down or not in real time. When the two judgment results are yes, the MCU selectively controls the power output of the red and blue LED power supply and the output module, the power output of the voice IC control output module and the output of the digital power amplifier output module so as to achieve the effects of red and blue flashing and/or voice warning. This be applied to light pronunciation warning effect control circuit of law enforcement record appearance has solved effectively among the prior art when the law enforcement record appearance is in the shutdown state, how to provide red sudden strain of a muscle, blue sudden strain of a muscle and the technical problem of pronunciation warning signal output, the law enforcement staff need not to press the key-down just can export red blue sudden strain of a muscle and pronunciation warning signal when the law enforcement record appearance is in the shutdown state promptly, further reach warning and frightening the effect of offender, the letter of law enforcement staff in law enforcement work has been improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a block diagram of a circuit structure of a light voice warning effect control circuit applied to a law enforcement recorder according to an embodiment of the present invention;

fig. 2 is a circuit structure diagram of the MCU according to the embodiment of the present invention;

fig. 3 is a circuit structure diagram of the digital power amplifier output module according to the embodiment of the present invention;

fig. 4 is a circuit structure diagram of an LED key module according to an embodiment of the present invention;

fig. 5 is a circuit diagram of a voice IC of the voice IC control output module according to an embodiment of the present invention;

fig. 6 is a circuit diagram of the voice IC power supply of the voice IC control output module according to the embodiment of the present invention;

fig. 7 is a circuit diagram of RED-blue LED power supply and RED-LED power supply of the output module according to the embodiment of the present invention;

fig. 8 is a circuit diagram of a BLUE-LED power supply of a red-BLUE LED power supply and output module according to an embodiment of the present invention;

fig. 9 is a circuit diagram of RED-blue LED of the RED-blue LED power supply and output module according to an embodiment of the present invention;

fig. 10 is a circuit diagram of BLUE-LED of the red-BLUE LED power supply and output module of an embodiment of the present invention;

fig. 11 is a flow chart illustrating the principle of the application of the light voice warning effect control circuit applied to the law enforcement recorder according to the embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, "and/or" in the whole text includes three schemes, taking a and/or B as an example, including a technical scheme, and a technical scheme that a and B meet simultaneously; in addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

Please refer to fig. 1, which is a block diagram of a circuit structure of a light voice warning effect control circuit applied to a law enforcement recorder according to an embodiment of the present invention.

As shown in fig. 1, in an embodiment, a light voice warning effect control circuit applied to a law enforcement recorder is provided, which includes a digital power amplifier output module, a voice IC control output module, a red-blue LED power supply and output module, an LED key module, a DSP chip, and a micro control unit MCU configured to control to send out red-blue flashing and/or voice warning signals when it is determined that the DSP chip is in a power-off state and an LED key of the LED key module is in a pressed state; the output end of the micro control unit MCU is respectively connected with the input end of the digital power amplifier output module, the input end of the voice IC control output module and the input end of the red and blue LED power supply and output module, and the input end of the micro control unit MCU is also respectively connected with a normal power supply, a state detection signal end of the DSP chip and a state detection signal end of the LED key module; the LED key module is characterized in that the input end of the LED key module is also connected with a normal power supply, the LED key module is also connected with the DSP chip, the DSP chip is also respectively connected with the red and blue LED power supply and output module, the digital power amplifier output module and the voice IC control output module, and the digital power amplifier output module and the voice IC control output module are connected.

The embodiment of the utility model provides an in light pronunciation warning effect control circuit for law enforcement record appearance, including digital power amplifier output module, pronunciation IC control output module, red blue LED power and output module, LED button module, DSP chip and be used for confirming the DSP chip be in shutdown state with the LED button of LED button module is in the little the control unit MCU who sends red blue burst and dodge and/or pronunciation warning signal when pressing the state. The MCU is powered on constantly so as to conveniently judge whether the DSP chip is powered off or not and whether the LED key is pressed down or not in real time. When the two judgment results are yes, the MCU selectively controls the power output of the red and blue LED power supply and the output module, the power output of the voice IC control output module and the output of the digital power amplifier output module so as to achieve the effects of red and blue flashing and/or voice warning. This be applied to light pronunciation warning effect control circuit of law enforcement record appearance has solved effectively among the prior art when the law enforcement record appearance is in the shutdown state, how to provide red sudden strain of a muscle, blue sudden strain of a muscle and the technical problem of pronunciation warning signal output, the law enforcement staff need not to press the key-down just can export red blue sudden strain of a muscle and pronunciation warning signal when the law enforcement record appearance is in the shutdown state promptly, further reach warning and frightening the effect of offender, the letter of law enforcement staff in law enforcement work has been improved.

Please refer to fig. 2, which is a circuit structure diagram of the MCU according to an embodiment of the present invention. Specific electronic components and their corresponding connections may be found in the accompanying drawings.

As shown in fig. 2, in the embodiment, the output end of the MCU is connected to the input end of the power amplifier IC of the digital power amplifier output module, the input ends of the LED power supplies of the red and blue LED power supplies and output module, the control end of the red flashing light and the control end of the blue flashing light, respectively. The input end of the micro control unit MCU is respectively connected with a normal power, a DSP chip state detection end and an LED key state detection end. The input end of the micro control unit MCU is connected with a normal power supply, and when the DSP chip stops working, namely is in a shutdown state, the micro control unit MCU can normally detect and output each control state.

Specifically, the micro control unit mcu (microcontrollerunit) is also called a single chip microcomputer (SingleChipMicrocomputer) or a single chip microcomputer. As a controller when a DSP (Digital Signal Processing) chip is in a shutdown state, the MCU is considered not to be operated in a default state. The working judgment conditions of the micro control unit MCU are as follows: first, whether the DSP chip is shut down or not; and secondly, whether the LED key is pressed down or not. Only on the premise of meeting the two conditions, the micro control unit MCU controls the voice IC (integrated circuit) to control the voice IC of the output module to supply power, the red and blue LED power supply and the red flashing light of the output module to supply power and turn on, and the red and blue LED power supply and the blue flashing light of the output module to supply power and turn on.

Specifically, the DSP chip is used as a controller in a normal working state, and the default state is that the DSP chip outputs related control signals only by pressing down an LED key in the normal working state, so that the red flashing light and the blue flashing light are controlled, and the voice IC works normally and outputs. After the DSP chip is started, when the LED KEY is pressed down, the BACK _ KEY of the DSP chip detects a high level input, and the signal is used as a judgment basis for judging whether the LED KEY is pressed down.

Please refer to fig. 3, which is a circuit structure diagram of the digital power amplifier output module according to an embodiment of the present invention. Specific electronic components and their corresponding connections may be found in the accompanying drawings.

As shown in fig. 3, in the embodiment, the input terminal 6 pin of the digital power amplifier IC of the digital power amplifier output module is respectively connected to the DSP chip and the system constant voltage 5V, the 3&4 pins are respectively connected to the left and right AUDIO input, the 1 pin is used as the control pin for controlling the normal switch of the digital power amplifier IC, and is respectively connected to the output terminal of the DSP chip and the output terminal of the voice IC through the diode.

Specifically, the power amplifier IC is an indispensable part of various audio devices, and is mainly used to amplify a weak signal input from an audio source device and generate a large enough current to drive a speaker to reproduce sound. The power amplifier is used for amplifying weak signals from a sound source or a preamplifier so as to drive the loudspeaker to play sound. The digital power amplifier IC has strong anti-interference capability.

Please refer to fig. 4, which is a circuit structure diagram of the LED key module according to the embodiment of the present invention. Specific electronic components and their corresponding connections may be found in the accompanying drawings.

In some embodiments, on the basis of the above embodiments, the input terminal of the MCU is connected to the status detection signal terminal of the LED key module through a diode D6.

In some embodiments, on the basis of the above embodiments, the LED key module is connected to the DSP chip through a diode D7.

In some embodiments, on the basis of the above embodiments, the LED key is a tact switch key.

As shown in fig. 4, in the embodiment, one end of the LED button is connected to a normal power to ensure a high level in a normal state, and the other end of the LED button is connected to the MCU and the DSP chip through diodes (D6 and D7), respectively, as an input state. When the LED key is pressed down, the MCU and the DSP chip respectively detect high level input. When a high level input is detected, it is determined that the LED key is pressed.

Please refer to fig. 5, which is a circuit structure diagram of the voice IC control output module according to the embodiment of the present invention. Specific electronic components and their corresponding connections may be found in the accompanying drawings.

Please refer to fig. 6, which is a circuit diagram of a voice IC power supply of the voice IC control output module according to an embodiment of the present invention. Specific electronic components and their corresponding connections may be found in the accompanying drawings.

In some embodiments, on the basis of the above embodiments, the light voice warning effect control circuit further includes an NPN-type transistor Q20, a bidirectional diode D8, and a P-type MOS transistor Q19, wherein the voice IC control output module is connected to a collector of the NPN-type transistor Q20 through the P-type MOS transistor Q19, a base of the NPN-type transistor Q20 is connected to the output terminal of the DSP chip and the output terminal of the MCU through the bidirectional diode D8, an emitter of the NPN-type transistor Q20 is grounded, and an input terminal of the P-type MOS transistor Q19 is connected to a 3.3V voltage.

As shown in fig. 5, in the embodiment, in the voice IC, a 7-pin input terminal is connected to a power supply of the voice IC, and an 8-pin output terminal is connected to a pin 6 of the digital power amplifier IC as an input terminal.

As shown in fig. 6, in the circuit of the VOICE IC power supply in the embodiment, the NPN transistor Q20 is connected to the output terminal of the DSP chip (DSP _ VOICE _ PWR) and the output terminal of the micro control unit MCU (VOICE _ PWR _ CTRL) through a bidirectional diode D8. The input end of the P-type MOS tube Q19 is connected with the constant 3.3V voltage of the system. And the output end (DSP _ VOICE _ PWR) of the DSP chip and the MCU (VOICE _ PWR _ CTRL) of the micro-control unit control the normal output of the VOICE IC power supply.

Specifically, the voice IC is only used as a slave in most applications and is controlled by the MCU on the product. The device is a simpler application only as a sound generating device without other peripheral circuits. Because of this, it has found extremely wide application.

In some embodiments, on the basis of the above embodiments, the type of the P-type MOS transistor Q19 is AO3401P type MOS transistor.

Specifically, the P-type MOS transistor is also called a P-channel silicon MOS field effect transistor, and includes a P-channel enhancement type field effect transistor and a P-channel depletion type field effect transistor. Two P + regions are respectively called a source electrode and a drain electrode on the N-type silicon substrate, no conduction is formed between the two electrodes, and when enough positive voltage is applied to the gate electrode (the source electrode is grounded), the N-type silicon surface under the gate electrode presents a P-type inversion layer to form a channel for connecting the source electrode and the drain electrode. Varying the gate voltage can vary the electron density in the channel and thus the resistance of the channel. Such a MOS field effect transistor is called a P-channel enhancement type field effect transistor. If the P-type inversion layer channel exists on the surface of the N-type silicon substrate without applying a grid voltage, the resistance of the channel can be increased or reduced by applying proper bias voltage. Such a MOS field effect transistor is called a P-channel depletion type field effect transistor.

In some embodiments, based on the above embodiments, the NPN transistor Q20 has a model number of 2N 3904.

Specifically, the NPN transistor refers to a transistor formed by two N-type semiconductors with a P-type semiconductor sandwiched therebetween, and is also called a transistor. The transistor has the main functions of current amplification and switching, and can convert weak electric signals into signals with certain intensity.

Please refer to fig. 7, which is a circuit structure diagram of RED and blue LED power supply and RED-LED power supply of the output module according to the embodiment of the present invention. Specific electronic components and their corresponding connections may be found in the accompanying drawings.

Please refer to fig. 8, which is a circuit diagram of the BLUE-LED power supply of the red and BLUE LED power supply and output module according to the embodiment of the present invention. Specific electronic components and their corresponding connections may be found in the accompanying drawings.

Please refer to fig. 9, which is a circuit structure diagram of RED-blue LED of the RED-blue LED power supply and output module according to an embodiment of the present invention. Specific electronic components and their corresponding connections may be found in the accompanying drawings.

Please refer to fig. 10, which is a circuit diagram of BLUE-LED of the red-BLUE LED power supply and output module according to an embodiment of the present invention. Specific electronic components and their corresponding connections may be found in the accompanying drawings.

In some embodiments, on the basis of the above embodiments, the red and blue LED power and output module comprises a red flashing light and a blue flashing light.

Specifically, in the red and blue LED power supply and output module, the power supplies of the red flashing light and the blue flashing light are controlled by the DSP chip and the MCU.

Specifically, the flashing light or the flashing warning light is composed of LED lights with high warning colors such as red, blue and the like, and is controlled by the chip to be regularly flashed to play an effective warning role. The flash LED is also one of Light Emitting Diodes (LEDs), and is a semiconductor component. The LED is called as a fourth-generation lighting source or a green light source, has the characteristics of energy conservation, environmental protection, long service life, small volume and the like, mainly comprises five materials of a bracket, silver colloid, a wafer, a gold wire and epoxy resin, and is a semiconductor capable of converting electric energy into light energy.

Specifically, the transistor Q10 and the transistor Q11 in the drawing are both NPN transistors, and the specific model is SS 8050.

In some embodiments, on the basis of the above embodiments, the input terminal of the MCU is connected to a constant power supply through the low dropout regulator LDO.

In some embodiments, on the basis of the above embodiments, the input terminal of the LED key module is connected to the constant power through the low dropout linear regulator LDO.

Specifically, an LDO (low dropout regulator) is a linear regulator that uses a transistor or Field Effect Transistor (FET) operating in its saturation region to subtract excess voltage from the applied input voltage to produce a regulated output voltage. The LDO has the characteristic of low voltage drop, the low cost of a low voltage drop (LDO) linear voltage regulator is low, the noise is low, the quiescent current is small, the required external elements are few, and generally only one or two bypass capacitors are needed. Low dropout linear regulators (LDOs) are a new generation of integrated circuit regulators, and the biggest difference between them and three-terminal regulators is that LDOs are a very low-consumption system on chip (soc) with few external devices.

Please refer to fig. 11, which is a flowchart illustrating an implementation principle of a light/voice warning effect control circuit applied to a law enforcement recorder according to an embodiment of the present invention.

The utility model relates to a law enforcement record appearance field, in particular to when the law enforcement is collected evidence, light voice warning control display effect.

At present, when a law enforcement recorder meets the situation that law enforcement is needed, the law enforcement can be realized only after a machine is started.

The disadvantage of this mode is that after the machine shuts down, the red flashing indicator lamp, the blue flashing indicator lamp and the voice warning of law enforcement record appearance all have no effect this moment, can not reach the effect that the warning frightened the illegal actor. In order to solve the problem, after the DSP chip is shut down, the effect is achieved by using the micro control unit MCU. The specific method is that the MCU is always powered. For stable control light voice warning effect, the micro control unit MCU still needs to judge two conditions:

firstly, the method comprises the following steps: whether the DSP chip is shut down or not;

secondly, the method comprises the following steps: whether the LED key is pressed.

After two preconditions judge that the condition is accomplished, little the control unit MCU control red explodes the power output of flashing light and blue explode the flashing light, pronunciation IC's power output, digital power amplifier IC's output to realize red blue explode the flashing + pronunciation warning's effect, of course, can also be selective only export and explode flashing effect, speech effect or off-state.

The utility model discloses a main aim at provides a be applied to law enforcement record appearance light pronunciation warning effect control circuit, when aiming at solving among the prior art at the DSP chip in the shutdown state, how effectual red of providing explodes and dodges, blue explodes the output of dodging and pronunciation warning effect, help law enforcement staff is when the shutdown state, need not to press the key-down and just can exports red blue and explodes and dodge and pronunciation warning signal, further improve the belief in the law enforcement work, reach warning and frightening the effect of offender.

In order to solve the technical problem, the utility model provides a technical solution does:

the embodiment of the utility model provides an in be applied to light pronunciation warning effect control circuit of law enforcement record appearance, include: the LED lamp comprises a red flashing light, a blue flashing light, a micro control unit MCU, a DSP chip, a voice IC, a digital power amplifier IC, a P-type MOS tube, an NPN-type triode, a low dropout regulator LDO, a bidirectional diode/light touch switch key, a resistor, a capacitor and other related elements. Wherein:

the DSP chip is used as a controller in a normal working state to control the output in different states.

And the micro control unit MCU is used as a controller when the DSP chip is in a shutdown state, and controls the output in different states.

The voice IC provides a sound source of an AUDIO voice alarm when the DSP chip is in a power-off state.

The digital power amplifier IC provides a sound source for the left and right AUDIO voice alarms when the DSP chip is in a normal working state.

The red and blue LED provides the red and blue light flashing warning when the DSP chip is in normal working and shutdown states.

The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.

Claims (10)

1. A light voice warning effect control circuit applied to a law enforcement recorder is characterized by comprising a digital power amplifier output module, a voice IC control output module, a red and blue LED power supply and output module, an LED key module, a DSP chip and a micro control unit MCU (microprogrammed control unit) for controlling and sending out red and blue flashing and/or voice warning signals when the DSP chip is confirmed to be in a power-off state and an LED key of the LED key module is confirmed to be in a pressed state; the output end of the micro control unit MCU is respectively connected with the input end of the digital power amplifier output module, the input end of the voice IC control output module and the input end of the red and blue LED power supply and output module, and the input end of the micro control unit MCU is also respectively connected with a normal power supply, a state detection signal end of the DSP chip and a state detection signal end of the LED key module; the LED key module is characterized in that the input end of the LED key module is also connected with a normal power supply, the LED key module is also connected with the DSP chip, the DSP chip is also respectively connected with the red and blue LED power supply and output module, the digital power amplifier output module and the voice IC control output module, and the digital power amplifier output module and the voice IC control output module are connected.

2. The light voice warning effect control circuit applied to the law enforcement recorder as claimed in claim 1, wherein the input end of the micro control unit MCU is connected with the state detection signal end of the LED key module through a diode D6.

3. The light voice warning effect control circuit applied to the law enforcement recorder as claimed in claim 1, wherein the LED key module is connected with the DSP chip through a diode D7.

4. A light voice warning effect control circuit applied to a law enforcement recorder as claimed in claim 1, further comprising an NPN transistor Q20, a bidirectional diode D8 and a P-type MOS transistor Q19, wherein the voice IC control output module is connected to a collector of the NPN transistor Q20 through the P-type MOS transistor Q19, a base of the NPN transistor Q20 is connected to an output terminal of the DSP chip and an output terminal of the MCU through the bidirectional diode D8, an emitter of the NPN transistor Q20 is grounded, and an input terminal of the P-type MOS transistor Q19 is connected to a normal 3.3V voltage.

5. The light voice warning effect control circuit applied to the law enforcement recorder as claimed in claim 4, wherein the type of the P-type MOS transistor Q19 is AO3401P type MOS transistor.

6. The light voice warning effect control circuit applied to the law enforcement recorder as claimed in claim 4, wherein the NPN type triode Q20 is 2N 3904.

7. The light voice warning effect control circuit applied to the law enforcement recorder as claimed in claim 1, wherein the LED key is a light touch switch key.

8. The light voice warning effect control circuit applied to the law enforcement recorder as claimed in claim 1, wherein the red and blue LED power and output module comprises a red flashing light and a blue flashing light.

9. The light voice warning effect control circuit applied to the law enforcement recorder as claimed in claim 1, wherein the input end of the MCU is connected with a normal power through a low dropout regulator LDO.

10. The light voice warning effect control circuit applied to the law enforcement recorder as claimed in claim 1, wherein the input end of the LED key module is connected with normal power through a low dropout regulator (LDO).

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