CN205620732U - Acoustic control light cube based on singlechip - Google Patents

Abstract

The utility model belongs to the technical field of LED three-dimensional display devices, in particular to a sound-controlled light cube based on a single-chip microcomputer, comprising a first single-chip microcomputer, a drive unit, a latch unit, a display unit and a power supply unit for supplying power to the system, the first single-chip microcomputer and the drive unit It is connected with the latch unit, the drive unit and the latch unit are respectively connected with the display unit, and also includes a second single-chip microcomputer, a sound detection unit, a music player unit and an audio detection unit, and the audio detection unit is connected with the first single-chip microcomputer through a priority coding unit, and the second A single-chip microcomputer preferentially processes the signal detected by the audio detection unit; the output end of the sound detection unit is connected with the input end of the second single-chip microcomputer, the output end of the second single-chip microcomputer is connected with the music playback unit through the relay unit, and the second single-chip microcomputer communicates with the first single-chip microcomputer connect. The utility model has simple structure and relatively strong three-dimensional effect.

Description

A sound-controlled light cube based on single-chip microcomputer

technical field

The utility model belongs to the technical field of LED three-dimensional display devices, in particular to a sound-controlled light cube based on a single-chip microcomputer.

Background technique

At present, LED display screens and two-dimensional advertising running lights are widely used. They can be seen in industrial sites, commercial streets, and entertainment venues. Three-dimensional graphics, for entertainment venues, their display effect is obviously too simple, the three-dimensional effect is relatively weak, and the appreciation is poor. Therefore, being able to produce flexible and colorful three-dimensional image LED displays will bring an unprecedented new visual experience to our lives.

Utility model content

The new purpose of the utility model is to provide a sound-controlled light cube based on a single-chip microcomputer, which has a simple structure and can dynamically display corresponding three-dimensional graphics according to music.

In order to achieve the above object, the utility model adopts the following technical solutions: a sound-controlled light cube based on a single-chip microcomputer, including a first single-chip microcomputer, a drive unit, a latch unit, a display unit and a power supply unit for supplying power to the system, the first single-chip microcomputer The output terminals are respectively connected to the input terminals of the drive unit and the latch unit, and the output terminals of the drive unit and the latch unit are respectively connected to the input terminals of the display unit. The display unit is an 8*8*8 LED lamp composed of 512 Cube dot matrix display, the cube dot matrix display has eight layers, the cathodes of each layer of LED lights are connected together, the anodes of each vertical LED light are connected together, the output end of the drive unit is connected to the cathode of each layer of LED lights Connected as the cathode drive of each layer of LED lamps, the output of the latch unit is connected to the anode of each vertical LED lamp as the anode drive of each vertical LED lamp; it also includes a second single-chip microcomputer for detecting No sound has sound detection unit, music playing unit and the audio detection unit that is used to detect music audio signal, described audio frequency detection unit is connected with the first single-chip microcomputer by priority encoding unit; The output end of described sound detection unit is connected with the second single-chip microcomputer The input end of the second single-chip microcomputer is connected with the music player unit through the relay unit; the second single-chip microcomputer is connected with the first single-chip microcomputer for communication.

The audio detection unit includes an extremely low audio detection module, a middle and low audio detection module, a low audio detection module, a middle audio detection module, a middle and high audio detection module, a high audio detection module, and an extremely high audio detection module.

It also includes a sound intensity detection unit for detecting the music sound intensity signal, and the output end of the sound intensity detection unit is connected with the second single-chip microcomputer through the A/D conversion unit.

Both the first single-chip microcomputer and the second single-chip microcomputer adopt enhanced 8051 single-chip microcomputer STC12C5A60S2.

The drive unit uses an eight-way NPN Darlington tube driver ULN2803A.

The latch unit adopts eight 74HC573 latches.

The priority encoding unit adopts 74HC148 priority encoder.

Compared with the prior art, the beneficial effects of the utility model are:

1. The sound detection unit in the utility model sends the detected sound signal to the second single-chip microcomputer, and the second single-chip microcomputer analyzes and processes the received signal. When the sound detection unit detects that there is sound, the second single-chip microcomputer controls the relay unit to obtain Electricity, the normally open contact of the relay unit is closed, the music player unit starts, the second single-chip microcomputer sends a signal to the first single-chip microcomputer at the same time, the first single-chip microcomputer controls the display unit to jump out of the standby animation screen, and after the display unit displays the preset animation, the first single-chip microcomputer Start to process the signals detected by the audio detection unit and the sound intensity detection unit, and control the display unit to display 3D graphics corresponding to the music at this time. Since the display unit is an 8*8*8 cube dot matrix display composed of 512 LED lights, it has the characteristics of strong 3D animation, good appreciation, and high cost performance, and can be applied to 3D advertising running lights, city night scenes, and outdoor landscapes. and many other fields;

2. The audio detection unit in the utility model includes 7 audio detection modules, 7 frequency bands from extremely low audio frequency to extremely high audio frequency, corresponding to 7 audio detection modules respectively, and the output signal of the audio detection unit is connected to the 74HC148 priority encoder The input terminal, the output terminal of the 74HC148 priority encoder is connected to the first single-chip microcomputer, and the first single-chip microcomputer preferentially processes the signal detected by the audio detection unit; and controls the display unit to display corresponding 3D animation graphics;

3. The sound intensity detection unit in the utility model has a large detection range, can detect each sound of music, and sends the detected sound intensity signal to the second single-chip microcomputer after being converted and processed by the A/D conversion unit. When 7 When the audio frequency detection modules cannot detect the frequency consistent with the preset fixed frequency, the first single-chip microcomputer will process the music sound intensity signal generated by the sound intensity detection unit at this time through the A/D conversion unit and the second single-chip microcomputer. Then the first single-chip microcomputer sends corresponding instructions to control the display unit to display 3D animation graphics corresponding to the music at the moment; the application of the sound intensity detection unit improves the problem of the small detection range of the audio detection unit.

Description of drawings

Fig. 1 is the control principle block diagram of the present utility model;

Fig. 2 is a schematic diagram of the detection circuit of the sound detection unit of the present invention.

detailed description

The utility model discloses a sound-controlled light cube based on a single-chip microcomputer. As shown in FIG. The sound intensity detection unit, drive unit, latch unit, display unit and power supply unit for the system to detect the music sound intensity signal, the first single-chip microcomputer and the second single-chip microcomputer both adopt enhanced 8051 single-chip microcomputer STC12C5A60S2, and the driving unit adopts eight-way NPN Darling Dayton tube driver ULN2803A, the latch unit adopts eight 74HC573 latches, the output terminals of the first single-chip microcomputer are respectively connected with the input terminals of the drive unit and the latch unit; the display unit is 8*8*8 composed of 512 LED lights Cube dot matrix display has the characteristics of strong 3D animation, good appreciation, and high cost performance. It can be applied to many fields such as 3D advertising running lights, urban night scenes, outdoor landscapes, etc. The cube dot matrix display has eight layers, each layer of LED The cathodes of the lamps are connected together, and each layer of LED lamps has a common cathode pin, a total of eight cathode pins, and the corresponding output terminals of the driver ULN2803A are respectively connected to the eight cathode pins, as the cathode drive of each layer of LED lamps ; The anodes of the LED lamps in each vertical column of the cube dot matrix display are connected together, a total of 64 anode pins, and each of the 64 anode pins is a group of eight, respectively connected to the corresponding output terminals of eight latches 74HC573 , the latch unit is used as the anode drive of each vertical LED lamp. Working principle: From layer analysis, each layer has 64 common-cathode LED lights, and the anodes of the 64 common-cathode LED lights are independently controlled without affecting each other; from column analysis, the cube dot matrix display has 64 vertical Each column has eight common anode LED lamps. Since the cathodes of the eight LED lamps are in different layers, they can be controlled independently without affecting each other. When you want to light up an LED lamp, you only need to give the column where the LED lamp is located a high level, and give the layer where the LED lamp is located a low level, and the LED lamp will receive a positive voltage, thus is lit.

The output end of the sound detection unit is connected with the input end of the second single-chip microcomputer, and the output end of the second single-chip microcomputer is connected with the music playing unit through the relay unit; the sound detection unit includes a microphone and a dual voltage comparator (LM393) U1, and the sound detection unit detects When there is sound, the microphone picks up the sound signal and converts the sound signal into an electrical signal, which is then amplified and compared by the amplifier circuit and the dual-voltage comparator U1, and then sent to the second single-chip microcomputer, and the second single-chip microcomputer processes the received signal And control the relay unit to be energized, the normally open contact of the relay unit is closed, and the music player unit starts; the second single-chip microcomputer sends a signal to the first single-chip microcomputer at the same time, and the first single-chip microcomputer controls the display unit to jump out of the standby animation screen, and after displaying the preset animation , the first single-chip microcomputer begins to process the signals detected by the audio detection unit and the sound intensity detection unit, and controls the display unit to display 3D animation graphics corresponding to the music at this time.

The schematic diagram of the detection circuit of the sound detection unit is shown in Figure 2. The pin 2 of the microphone is connected to the power supply through the first resistor R1, and the pin 1 is grounded. The fourth resistor R4 and the fourth resistor R4 are connected in parallel between the pin 2 and pin 1 of the microphone. Three capacitors C3, the pin 2 of the microphone is connected to the base of the transistor T1 through the first capacitor C1, the base of the transistor T1 is connected to the power supply through the second resistor R2, the collector of the transistor T1 is connected to the power supply through the third resistor R3, and the transistor T1 The collector of the transistor T1 is grounded through the fourth capacitor C4, the emitter of the transistor T1 is grounded, the collector of the transistor T1 is connected to the pin 3 of the dual voltage comparator (LM393) U1, and the pin 4 of the dual voltage comparator U1 is grounded, and the dual voltage Pin 8 of the comparator UI is connected to the power supply, pin 8 of the dual-voltage comparator U1 is grounded through the second capacitor C2, pin 2 of the dual-voltage comparator U1 is connected to the reference voltage source; pin 3 of the connector P3 is connected to the power supply , the pin 2 (ground terminal) of the connector P3 is connected to the cathode of the first light-emitting diode D1 through the fifth resistor R5, and the anode of the first light-emitting diode D1 is connected to the power supply; the pin 1 (output terminal) of the connector P3 is connected through the fifth resistor R5 The six resistors R6 are connected to the negative pole of the second light-emitting diode D2, the positive pole of the second light-emitting diode D2 is connected to the power supply, the positive pole of the second light-emitting diode D2 is connected to the first end of the seventh resistor R7, and the second end of the seventh resistor R7 is connected to the The pin 1 of the connector P3 is connected, the first end of the seventh resistor R7 is also connected to the first end of the sliding resistor R8, the second end of the sliding resistor R8 is grounded, the sliding end of the sliding resistor R8 is connected to the dual voltage comparator U1 Pin 2 is connected, and pin 1 of the dual-voltage comparator U1 is connected to the input terminal of the second microcontroller.

When the power is turned on, the first light-emitting diode D1 (power indicator light) is on. When there is sound in the environment, the microphone picks up the sound signal and converts the sound signal into an electrical signal. At this time, the electrical signal is amplified by the transistor T1 and sent To the dual-voltage comparator U1, the dual-voltage comparator U1 compares the signal collected by the microphone with the reference voltage signal. When there is no sound or the sound is very small, the voltage of pin 3 of the dual-voltage comparator U1 is relatively high. When the dual-voltage comparator The voltage of pin 3 of comparator U1 is higher than the voltage of pin 2 (reference voltage value), the output of pin 1 of dual voltage comparator U1 is high level, and the second light-emitting diode D2 (sound indicator light) is off; when there is sound, The voltage of pin 3 of the dual voltage comparator U1 is lower than the voltage of pin 2 (reference voltage value), the output of pin 1 of the dual voltage comparator U1 is low level, the second LED D2 (sound indicator light) is on, and the second The single-chip microcomputer controls the relay unit to be powered on, and the music player unit starts. By adjusting the sliding resistor R8, the reference voltage value input to pin 3 of the dual-voltage comparator U1 can be changed, and the effective value of the sound signal collected by the microphone can be changed, that is, it can be changed. The sound detection unit detects the magnitude of the effective sound.

The audio detection unit includes an extremely low audio detection module, a low-medium audio detection module, a low audio detection module, a mid-to-high audio detection module, a high-frequency audio detection module, and an extremely high audio detection module. The audio detection unit communicates with the priority encoding unit The input terminal of the first single-chip microcomputer is connected, and the 7 audio detection modules all use LM567 frequency discrimination modules, and the 7 audio detection modules correspond to 7 LM567 frequency discrimination modules. Processing, and then carry out frequency identification on the signal, that is, compare it with a fixed frequency set in advance. When the frequency is the same, output a switching signal to achieve the purpose of audio identification of the fixed frequency, and then output the corresponding signal to 74HC148 priority Encoder, Priority The encoder performs encoding and sends the corresponding code to the first single-chip microcomputer. The first single-chip microcomputer processes the signal detected by the audio detection unit first, and controls the display unit to display 3D animation graphics corresponding to the music. The audio frequency detected by the 7 audio detection modules in this design corresponds to a fixed frequency in the 7 frequency bands from extremely low audio frequency to extremely high audio frequency. 40~150HZ, low frequency range 150~500HZ, middle frequency range 500~2KHZ, middle and high frequency range 2K~5KHZ, high frequency range 5K~10KHZ, extremely high frequency range 10~20KHZ; the extremely low frequency detection module corresponds to 40HZ in the extremely low frequency range The frequency, middle and low audio frequency detection module corresponds to the 100HZ frequency in the middle and low frequency range, the low frequency detection module corresponds to the 300HZ frequency in the low frequency range, the middle frequency detection module corresponds to the 1200HZ frequency in the middle frequency range, and the middle and high frequency detection module corresponds to the middle and high frequency range The frequency of 3000HZ, the high-frequency detection module corresponds to the 7KHZ frequency in the high-frequency range, and the extremely high-frequency detection module corresponds to the 10KHZ frequency in the high-frequency range. Table 1 shows the analysis of the output results of the 7 audio detection modules.

Table 1

.

The sound intensity detection unit adopts LM386 module. LM386 module is an audio integrated power amplifier, which has the advantages of low power consumption, adjustable internal link gain, large power supply voltage range, few external components and small total harmonic distortion. The output end of the sound intensity detection unit is connected to the second single-chip microcomputer through the A/D conversion unit. The A/D conversion unit adopts the ADC0809 chip. The microphone of the LM386 module can detect the change of the music sound intensity, and the music sound intensity signal is converted into an electrical signal After being amplified by the power amplifier LM386, it is sent to the A/D conversion unit for conversion. The A/D conversion unit converts the received electrical signal into a digital signal and sends it to the second single-chip microcomputer. The second single-chip microcomputer combines the received digital signal with its internal Compare the numbers corresponding to each sound intensity segment stored in advance to analyze which sound intensity range the received signal belongs to, and then send the processing result to the first single-chip microcomputer for reference by the first single-chip microcomputer. When the pre-set fixed frequency is consistent with the signal, the first single-chip microcomputer will process the music sound intensity signal sent by the sound intensity detection unit through the second single-chip microcomputer, and send instructions to the drive unit and/or latch unit according to the received signal , the display unit is controlled to display 3D animation graphics corresponding to the music at this time, and the application of the sound intensity detection unit improves the problem of the small detection range of the audio detection unit.

Since this design has a priority processing level, the two-way synchronous detection of the audio detection unit and the sound intensity detection unit has a good detection effect.

Working principle: Turn on the working power, the display unit displays the standby animation, the sound detection unit detects whether there is sound, when no sound is detected, the display unit still displays the standby animation; when the sound is detected, the sound detection unit sends a message to the second microcontroller signal, the second single-chip microcomputer controls the action of the relay unit, and the music playback unit starts to play music; at the same time, the second single-chip microcomputer sends a signal to the first single-chip microcomputer, and after the first single-chip microcomputer receives the signal, the control display unit jumps out of the standby animation to display the corresponding preset graphics.

The audio detection unit processes the detected music signal and sends it to the priority encoding unit, and the priority encoder 74HC148 encodes it and then sends the corresponding code to the first single-chip microcomputer, and the first single-chip microcomputer processes the received signal and sends it to the drive unit and/or The latch unit sends corresponding instructions to control the display unit to display 3D animation graphics that change with the music.

The sound intensity detection unit sends the detected signal to the first single-chip microcomputer successively through the A/D conversion unit and the second single-chip microcomputer, and the first single-chip microcomputer processes the received signal and sends corresponding instructions to the drive unit and/or latch unit to control The display unit displays 3D animated graphics that change with the music.

The utility model has a simple structure, the audio detection unit and the sound intensity detection unit are two-way synchronous detection, the detection effect is good, and the display unit can dynamically display the corresponding 3D graphics according to the music, and has the characteristics of a strong sense of three-dimensional animation, good appreciation and high cost performance .

Claims (7)

1. A sound-controlled light cube based on a single-chip microcomputer, comprising a first single-chip microcomputer, a drive unit, a latch unit, a display unit and a power supply unit for system power supply, the output terminal of the first single-chip microcomputer is connected with the drive unit and the latch unit respectively The input terminals are connected, and the output terminals of the drive unit and the latch unit are respectively connected with the input terminals of the display unit. The display unit is an 8*8*8 cube dot matrix display composed of 512 LED lights, and the cube dot matrix display is eight layer, the cathodes of each layer of LED lamps are connected together, the output of the drive unit is connected to the cathode of each layer of LED lamps as the cathode drive of each layer of LED lamps, the anodes of each vertical LED lamp are connected together, and the latch The output end of the unit is connected to the anode of each vertical LED lamp as the anode drive of each vertical LED lamp; it is characterized in that it also includes a second single-chip microcomputer, a sound detection unit for detecting whether there is sound, a music playback unit and An audio detection unit for detecting music audio signals, the audio detection unit is connected with the first single-chip microcomputer through a priority coding unit; the output end of the sound detection unit is connected with the input end of the second single-chip microcomputer, and the output end of the second single-chip microcomputer is passed through The relay unit is connected with the music playing unit; the second single-chip microcomputer is communicatively connected with the first single-chip microcomputer. 2. The sound-controlled light cube based on single-chip microcomputer as claimed in claim 1, characterized in that: the audio detection unit includes an extremely low audio detection module, a middle and low audio detection module, a low audio detection module, a middle audio detection module, and a middle and high audio detection module. Detection module, high audio detection module, extremely high audio detection module. 3. the sound-controlled light cube based on single-chip microcomputer as claimed in claim 1, is characterized in that: also comprise the sound intensity detection unit that is used to detect music intensity signal, the output end of sound intensity detection unit is through A/D conversion unit and the first Two microcontrollers are connected. 4. The sound-controlled light cube based on a single-chip microcomputer according to any one of claims 1-3, characterized in that: the first single-chip microcomputer and the second single-chip microcomputer both use enhanced 8051 single-chip microcomputer STC12C5A60S2. 5. The sound-controlled light cube based on a single-chip microcomputer according to any one of claims 1-3, characterized in that: the drive unit is an eight-way NPN Darlington driver ULN2803A. 6. The sound-activated light cube based on a single-chip microcomputer according to any one of claims 1-3, wherein the latch unit adopts eight 74HC573 latches. 7. The sound-controlled light cube based on a single-chip microcomputer according to any one of claims 1-3, wherein the priority encoding unit adopts a 74HC148 priority encoder.