CN207305007U

CN207305007U - It is a kind of based on the LED drive circuit being wirelessly transferred

Info

Publication number: CN207305007U
Application number: CN201721393016.9U
Authority: CN
Inventors: 于文新; 王俊年; 王彬任; 薄祥雷; 王振恒; 李燕
Original assignee: Hunan University of Science and Technology
Current assignee: Hunan University of Science and Technology
Priority date: 2017-10-25
Filing date: 2017-10-25
Publication date: 2018-05-01
Anticipated expiration: 2027-10-25

Abstract

The utility model discloses a kind of based on the LED drive circuit being wirelessly transferred, including power supply, GSM circuits, control circuit, drive circuit, the power supply is connected with control circuit, working power is provided for whole drive circuit, the output terminal of control circuit is connected with the input terminal of drive circuit, the output terminal of drive circuit is connected with LED lamp source array, and control circuit is connected with GSM circuits, is connected respectively with mobile phone card, microphone, earphone, loudspeaker by GSM circuits.The drive circuit of the utility model includes six latch, wherein 16 rows of 2 driving LED lamp sources, 32 row of remaining 4 drivings LED lamp source, are shown in the form of progressive scan, saves I/O port resource by serial input data, reduces cost.

Description

It is a kind of based on the LED drive circuit being wirelessly transferred

Technical field

A kind of LED drive circuit is the utility model is related to, it is more particularly to a kind of based on the LED drive circuit being wirelessly transferred.

Background technology

LED (Light Emitting Diode), is light emitting diode abbreviation.It is different according to its chemical composition, it can send out Go out the light of different colours.Since LED has the advantages that specular removal, long-life, energy conservation and environmental protection, it is widely used in various illumination necks Domain.

The dimming mode of LED is divided into direct current light modulation and PWM dims two kinds.Due to PWM light modulation have it is photochromic constant, it is low bright The advantages that stability is preferable when spending, and widely used by those skilled in the art.Light modulation and driving to LED are all to pass through drive What dynamic circuit was realized.A driving master chip can only drive a LED in existing major part LED drive circuit, if more Paths of LEDs then needs multiple driving master chips to drive, and carrying load ability is poor, need to such as drive multiple LED circuits at the same time, then circuit knot Structure is excessively complicated.

The content of the invention

In order to solve the above-mentioned technical problem, it is low based on being wirelessly transferred to provide a kind of simple in structure, cost for the utility model LED drive circuit.

The technical solution that the utility model solves the above problems is：It is a kind of based on the LED drive circuit being wirelessly transferred, including Power supply, GSM circuits, control circuit, drive circuit, the power supply are connected with control circuit, and work is provided for whole drive circuit Power supply, the output terminal of control circuit are connected with the input terminal of drive circuit, output terminal and the LED lamp source array phase of drive circuit Even, control circuit is connected with GSM circuits, is connected respectively with mobile phone card, microphone, earphone, loudspeaker by GSM circuits.

It is above-mentioned that microcontroller is used based on the LED drive circuit being wirelessly transferred, the main control chip of the control circuit STC89C51。

It is above-mentioned to be arranged based on the LED drive circuit being wirelessly transferred, the LED lamp source array size for 16 rows 32, LED lamp source battle array Cathode of the row per a line joins altogether, and the anode of each row joins altogether.

It is above-mentioned based on the LED drive circuit being wirelessly transferred, the drive circuit include the first to the 32nd triode and The first to the 6th identical latch of model, the first latch are cascaded with the second latch, the first latch and the second lock The input terminal of storage is connected with the output terminal of control circuit, the output terminal of the first latch respectively with LED lamp source array first It is connected to the 8th row, the output terminal of the second latch is connected with the 9th to the 16th row of LED lamp source array respectively, and the 3rd latches Device to the 6th latch is coupled step by step, the 3rd latch to the input terminal of the 6th latch and the output terminal phase of control circuit Even, base stage of the output terminal of the 3rd latch respectively with the first to the 8th triode is connected, the output terminal difference of the 4th latch Be connected with the base stage of the 9th to the 16th triode, the output terminal of the 5th latch respectively with the 17th to the 24th triode Base stage be connected, the base stage of the output terminal of the 6th latch respectively with the 25th to the 32nd triode is connected, first to The connection corresponding with the first to the 32nd row of LED lamp source array respectively of the emitter of 30th No. two triode.

It is above-mentioned that 74HC595 is used based on the LED drive circuit being wirelessly transferred, the model of the described first to the 6th latch.

It is above-mentioned that GSM-A6 chips are used based on the LED drive circuit being wirelessly transferred, the GSM circuits, GSM-A6 chips 9th pin is connected with microcontroller, for being set into line level, selects the power consumption mode of GSM-A6 chips；The 13- of GSM-A6 chips 17 pins are connected with mobile phone card, are read the information of mobile phone card and are connected with the radio data network of corresponding with service business, are realized wireless Data transfer；19,20 pins of GSM-A6 chips are connected with microphone realizes wireless speech communication function；GSM-A6 chips 26, 27 pins are connected with loudspeaker directly plays voice；21,23,24 pins of GSM-A6 chips and the receiver of earphone connect.

The beneficial effects of the utility model are：The drive circuit of the utility model includes six latch, wherein 2 drives 16 rows of dynamic LED lamp source, 32 row of remaining 4 drivings LED lamp source, are shown in the form of progressive scan, will be each Capable control data form an array, will light the corresponding LED data of every row and form another array, constantly will be per a line The LED light lighted is shown, is shown always to 16 rows, is repeated the display process；I/O port is saved by serial input data to provide Source, reduces cost.

Brief description of the drawings

Fig. 1 is the structure diagram of the utility model.

Fig. 2 is the circuit diagram of control circuit in Fig. 1.

Fig. 3 is the circuit diagram of the latch of drive circuit in Fig. 1.

Fig. 4 is the circuit diagram of the triode of drive circuit in Fig. 1.

Fig. 5 is the circuit diagram of GSM circuits in Fig. 1.

Fig. 6 is the circuit diagram of power supply in Fig. 1.

Embodiment

The utility model is further described with reference to the accompanying drawings and examples.

As shown in Figure 1, the utility model includes power supply, GSM circuits, control circuit, drive circuit, the power supply and control Circuit is connected, and provides working power for whole drive circuit, the circuit diagram of power supply is as shown in Figure 6；The output terminal of control circuit with The input terminal of drive circuit is connected, and the output terminal of drive circuit is connected with LED lamp source array, and the LED lamp source array size is 16 rows 32 arrange, and cathode of the LED lamp source array per a line joins altogether, and the anode of each row joins altogether.Control circuit is connected with GSM circuits, It is connected respectively with mobile phone card, microphone, earphone, loudspeaker by GSM circuits.

As shown in figure 5, the GSM circuits use GSM-A6 chips, the 9th pin of GSM-A6 chips is connected with microcontroller, For being set into line level, the power consumption mode of GSM-A6 chips is selected；The 13-17 pins of GSM-A6 chips are connected with mobile phone card, Read the information of mobile phone card and be connected with the radio data network of corresponding with service business, realize wireless data transmission；GSM-A6 chips 19,20 pins be connected with microphone and realize wireless speech communication function；26,27 pins of GSM-A6 chips are connected directly with loudspeaker Play voice；21,23,24 pins of GSM-A6 chips and the receiver of earphone connect.

As shown in Fig. 2, the main control chip of the control circuit uses microcontroller STC89C51.In SCM peripheral circuit, The crystal oscillator of 12MHz is connected in 18/19 pin of microcontroller, i.e., 12MHz crystal oscillators are connected between XTAL1, XTAL2 of microcontroller, So as to obtain the refreshing frequency that can meet the design demand so that the refreshing frequency of LED can meet the visual response time of human body, Human eye is seen individually brighter than smoother animation effect rather than a row or a line LED.Microcontroller has two individually Data buffer can receive and send at the same time data, be used for using one of them as 8 asynchronous messaging interfaces, it Baud rate can change, as microcontroller and the access port of the module GSM-A6 of the mobile data transmission information being connected.With This carries out operation control using the P2.1 interfaces of microcontroller come the 8th pin PWR_KEY to GSM-A6 modules at the same time, this is just It is start key mapping used in GSM-A6 modules, this foot can arbitrarily select to break and not turn off after microcontroller is opened, and only need Voltage needed for providing is with regard to that can achieve the goal, the problem of power supply without consideration.The GSM-A6 of P2.0 interfaces can be used during control 9th pin GPIO1/INT, achievees the purpose that low-power consumption to manipulate GSM-A6 modules in this way so that high level exits, So that low level enters, it is standby under this mode control of low current to be necessarily less than 1mA, but serial ports is not under this scheme control It can go what is used.P2.3 and P2.6 can act as the input data clock line of LED row and columns, scanning chip corresponding thereto Main triggering mode is to trigger displacement by trailing edge, but the data of register be will not be changed.P2.4 with P2.5 similarly will come one as the serial data port of LED row and columns, required data by serial control mode Send to position position the control chip of scanning on the other side to.Used output storage be with latch clock line P2.2 and P2.7 is as the data port of row and column, and when rising edge occurs, the register data of displacement is input to depositing for data Inside memory register, when trailing edge occurs, what the data of storage register were no variation in.Therefore substantially will storage Device setting regulation and control are into low level, if after end-of-shift, a positive pulse can be formed, so as to change by positive pulse With the data of renewal display.P0 is not connected with other, if necessary, it is capable of the ROM and RAM of extension system.

As shown in Figure 3, Figure 4, the drive circuit include the first to the 32nd triode it is identical with model first to 6th latch, the model of the first to the 6th latch use 74HC595, and the first latch is cascaded with the second latch, First latch is connected with the input terminal of the second latch with the output terminal of control circuit, the output terminal of the first latch respectively with The first of LED lamp source array is connected to the 8th row, the output terminal of the second latch respectively with LED lamp source array the 9th to the tenth Six rows are connected, and the 3rd latch to the 6th latch is coupled step by step, the input terminal of the 3rd latch to the 6th latch with The output terminal of control circuit is connected, and the base stage of the output terminal of the 3rd latch respectively with the first to the 8th triode is connected, and the 4th Base stage of the output terminal of latch respectively with the 9th to the 16th triode is connected, and the output terminal of the 5th latch is respectively with the tenth The base stage of seven to the 24th triodes is connected, the output terminal of the 6th latch respectively with the 25th to the 32nd triode Base stage be connected, the emitter of first to the 30th No. two triode the first to the 32nd row with LED lamp source array respectively Corresponding connection.

The operation principle of the utility model is as follows：The magnetic dot arrays for the 8*8 that overall dot matrix is arranged by two rows four are formed, each dot Battle array is arranged by 8 rows 8, and 64 LED light are formed altogether, and the anode of each of which row LED light, which all links together, draws an anode Signal wire, one shares 16 anode signal lines, meanwhile, the cathode of each row LED light, which all links together, draws a cathode letter Number line, one shares 32 cathode signal lines.As shown in figure 3, the row of the entirety dot matrix is controlled by two 74HC595 chip controls, And its row control is by four 74HC595 chip controls.Since the display of the entirety dot matrix is using gradually LED of the scanning per a line The mode of lamp, i.e., gradually export high level, as long as wherein the moon of LED by 8 anode signal lines of two 74HC595 chips connections Pole signal wire has been assigned low level, then the corresponding LED light of this row can be lit.If it is intended to one complete figure of display, Then record forms the position for the LED light that this figure is lit per a line, that is, it is low level to assign corresponding cathode line.Institute To have corresponded to the cathode line data of 4 two bytes per a line, an only anode line is endowed high level.Due to integral LED point Battle array has 16 rows, then needs system to scan 16 times, light the corresponding LED light of every row each time.When system scan frequency is more than 24Hz When, caused using the visual persistence effect of human eye it is seen that a complete figure, no longer produces flickering.Data are then Produced by microcontroller and sent to 74HC595 chips, sent finally by the pin of 74HC595 to the anode line of dot matrix and cathode line. The minimum system of microcontroller is as shown in Fig. 2, the Y1 in figure is crystal oscillator element, it provides system clock for microcontroller, due to monolithic The pin output current deficiency of machine, is not enough to lightening LED lamp, is carried to increase the electric current output size of the microcontroller pin design The current driving circuit such as Fig. 4 has been supplied, the pin of the 74HC595 chips of 4 control row is connected to the base stage of NPN, emitter Cathode line is connected to, and the collector of each NPN is connected to digitally.When the pin of this 4 74HC595 is high level, NPN Triode ON lights corresponding LED light so as to increase electric current.Fig. 5 is then gsm module circuit diagram, gsm module energy It is enough to realize long-range display figure.Data are sent to the serial ports of microcontroller by gsm module, when microcontroller receives data by phase The data answered are sent to 74HC595 chips so as to show corresponding figure.Fig. 6 is then the power supply circuit of system, first will The alternating current of 220V is down to the alternating current of 75V by transformer pressure-reducing, is then gone to alternating current by rectifier bridge unstable Direct current, wherein C4, C5 are filter capacitor, finally by voltage stabilizing chip and electric capacity of voltage regulation C6 by voltage stabilization in 5V or so, from And provide supply voltage for whole system.

Claims

It is 1. a kind of based on the LED drive circuit being wirelessly transferred, it is characterised in that：Including power supply, GSM circuits, control circuit, driving Circuit, the power supply are connected with control circuit, and working power, the output terminal of control circuit and driving are provided for whole drive circuit The input terminal of circuit is connected, and the output terminal of drive circuit is connected with LED lamp source array, and control circuit is connected with GSM circuits, passes through GSM circuits are connected with mobile phone card, microphone, earphone, loudspeaker respectively.
It is 2. according to claim 1 based on the LED drive circuit being wirelessly transferred, it is characterised in that：The control circuit Main control chip uses microcontroller STC89C51.
It is 3. according to claim 1 or 2 based on the LED drive circuit being wirelessly transferred, it is characterised in that：The LED lamp source Array size arranges for 16 rows 32, and cathode of the LED lamp source array per a line joins altogether, and the anode of each row joins altogether.
It is 4. according to claim 3 based on the LED drive circuit being wirelessly transferred, it is characterised in that：The drive circuit bag The first to the 32nd triode first to sixth latch identical with model is included, the first latch and the second latch carry out Cascade, the first latch are connected with the input terminal of the second latch with the output terminal of control circuit, the output terminal of the first latch Be connected respectively with the first to the 8th row of LED lamp source array, the output terminal of the second latch respectively with LED lamp source array the 9th Be connected to the 16th row, the 3rd latch to the 6th latch is coupled step by step, the 3rd latch to the 6th latch it is defeated Enter end with the output terminal of control circuit to be connected, the output terminal of the 3rd latch base stage phase with the first to the 8th triode respectively Even, base stage of the output terminal of the 4th latch respectively with the 9th to the 16th triode is connected, the output terminal point of the 5th latch Base stage not with the 17th to the 24th triode is connected, and the output terminal of the 6th latch is respectively with the 25th to the 30th The base stage of two triodes is connected, the emitter of first to the 30th No. two triode respectively with LED lamp source array first to The corresponding connection of 32 row.
It is 5. according to claim 4 based on the LED drive circuit being wirelessly transferred, it is characterised in that：Described first to the 6th The model of latch uses 74HC595.
It is 6. according to claim 4 based on the LED drive circuit being wirelessly transferred, it is characterised in that：The GSM circuits use GSM-A6 chips, the 9th pin of GSM-A6 chips are connected with microcontroller, for being set into line level, select GSM-A6 chips Power consumption mode；The 13-17 pins of GSM-A6 chips are connected with mobile phone card, read mobile phone card information and with the nothing of corresponding with service business Line number realizes wireless data transmission according to network connection；19,20 pins of GSM-A6 chips are connected with microphone realizes that wireless speech leads to Communication function；26,27 pins of GSM-A6 chips are connected with loudspeaker directly plays voice；21,23,24 pins of GSM-A6 chips with The receiver connection of earphone.