Digital band buzzer control LED flasher for motorcycles

Abstract

The application discloses a digital band buzzer control LED flasher for a motorcycle and relates to the technical field of motorcycle flasher. The application comprises a power supply voltage stabilizing circuit, a light-off voltage sampling circuit, a light-off current sampling circuit, an MCU circuit, a load short circuit protection circuit, a flash frequency control circuit and a buzzer driving circuit; the MCU circuit is electrically connected with the power supply voltage stabilizing circuit, the light-off voltage sampling circuit, the light-off current sampling circuit, the load short circuit protection circuit and the flash frequency control circuit respectively. The application detects the voltage and the current of the LED flasher, judges whether the LED flasher has the light-off problem or not, and when the light-off problem occurs, the light-off frequency of the flasher can be doubled and a sound is emitted for reminding.

Description

Technical Field

[0001] This invention belongs to the field of motorcycle flashlight technology, and in particular relates to a digital LED flashlight with buzzer control for motorcycles. Background Technology

[0002] Traditional LED flashers suffer from significant differences in flash frequency during mass production due to their circuit structure. Furthermore, when the power supply voltage drops below 10.5V or rises above 15V and the LED falls off, the flash frequency cannot be doubled.

[0003] Traditional LED flashers are only suitable for vehicles that do not emit sound warnings, and cannot meet the needs of LED vehicles that require sound warnings from a buzzer. Summary of the Invention

[0004] The purpose of this invention is to provide a digital LED flasher with buzzer control for motorcycles, thereby solving existing problems.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0006] This invention relates to a digital LED flasher with buzzer control for motorcycles, comprising a power supply regulator circuit, a lamp-down voltage sampling circuit, a lamp-down current sampling circuit, an MCU circuit, a load short-circuit protection circuit, a flashing control circuit, and a buzzer driver circuit; the MCU circuit is electrically connected to the power supply regulator circuit, the lamp-down voltage sampling circuit, the lamp-down current sampling circuit, the load short-circuit protection circuit, and the flashing control circuit, respectively.

[0007] The MCU circuit includes a chip U2, which has pins 1, 2, 3, 4, 5, 6, 7, and 8.

[0008] The power supply regulator circuit is used to regulate voltage and supply power to other circuits or components.

[0009] The flash control circuit includes a switching transistor Q3, which controls the switching transistor Q3 to turn on and off via a signal provided by the MCU circuit, thereby enabling the flashlight to blink.

[0010] The flash voltage sampling circuit is used to detect whether the flash has fallen out. When the flash falls out, it sends a flash signal to the MCU circuit and works with the flash current sampling circuit to drive the chip U2.

[0011] The flash current sampling circuit is used to detect whether the flash has gone out. When the flash goes out, it sends a flash signal to the MCU circuit and works with the flash voltage sampling circuit to drive the chip U2.

[0012] The load short-circuit protection circuit is designed to provide a signal to pin 6 of chip U2 when the positive and negative terminals of the flash lamp are short-circuited.

[0013] The buzzer drive circuit includes several buzzers, which are used to emit sound when the left or right turn switch or emergency switch is turned on.

[0014] Preferably, it further includes a terminal block P1 and a voltage source, wherein the voltage source is electrically connected to various circuits and electrical components through the terminal block P1, and the voltage source is a 12V DC voltage source.

[0015] Preferably, the power supply regulator circuit includes diode D1, capacitor C1, capacitor C2, capacitor C5, resistor R4, resistor R5, resistor R6, resistor R7, transistor Q1, and chip U1.

[0016] The positive terminal of the voltage source is grounded in sequence through diode D1, and parallel capacitors C1 and C2; the collector of transistor Q1 is connected to the high level VCC and is connected between diode D1 and capacitor C1 through resistor R4; the emitter of transistor Q1 is connected to the high level VDD and is grounded through series resistors R6 and R7.

[0017] The high-level VCC is grounded through capacitor C5; chip U1 is a triode thyristor, the anode of chip U1 is grounded, the cathode is connected to the base of transistor Q1, and the control electrode is connected between resistors R6 and R7.

[0018] Preferably, the lamp-down voltage sampling circuit includes resistors R1, R2, and R3, capacitor C8, and Zener diode Z1. Diode Z1 is connected in series with resistors R1, R3, and R2. Capacitor C8 and Zener diode Z1 are both connected in parallel with resistor R2, and resistors R2 and R3 are connected in parallel.

[0019] Pin 3 of chip U2.

[0020] Preferably, the flash control circuit includes a transistor Q2, a switching transistor Q3, resistors R8, R9, and R10, and a Zener diode Z3. The base of transistor Q2 is connected to pin 7 of chip U2 through resistor R8, the collector of transistor Q2 is connected to the positive terminal of the voltage source through resistors R10 and R9, and the emitter of transistor Q2 is grounded. The gate of switching transistor Q3 is connected between resistors R9 and R10, the source is connected to the positive terminal of the voltage source, and the drain is electrically connected to the direction switch through resistor R22. Zener diode Z3 is connected between the gate and source of switching transistor Q3.

[0021] Preferably, the lamp-drop current sampling circuit includes two chips U3, namely U3A and U3B. Both chips U3A and U3B are amplifiers. The non-inverting input terminal of chip U3B is connected to the emitter of transistor Q2 through resistor R19, and is connected to a diverter switch through resistors R20 and R22. The inverting input terminal of chip U3B is connected to the diverter switch through resistor R21. A capacitor C11 is connected in parallel with resistor R22. The output terminal of chip U3B is connected to the non-inverting input terminal of chip U3A through resistor R17. The inverting input terminal of chip U3A is connected to the output terminal of chip U3A through resistor R16. The output terminal of chip U3A is connected to pin 5 of chip U2 through resistor R15. Pin 5 of chip U2 is grounded through a parallel capacitor C9 and a Zener diode Z5. The inverting input terminal of chip U3A is grounded through resistor R26.

[0022] Preferably, the load short-circuit protection circuit includes resistors R18, R27, and R25, diode D2, and Zener diode Z6. The inverting input terminal of chip U3B is connected to pin 6 of chip U2 in sequence through resistors R18, R27, and diode D2. Pin 6 of chip U2 is grounded through resistor R25 and Zener diode Z6 connected in parallel. The output terminal of chip U3B is connected between resistors R18 and R27.

[0023] Preferably, the terminal block P1 includes pins 1, 2, 3, 4, 5, 6, 7, and 8; the buzzer drive circuit includes buzzers D3, D4, D5, and D6, with buzzers D3 and D5 connected in series at terminal block P1.

[0024] The buzzers D4 and D6, which are connected in series, are also connected between pins 1 and 6 of terminal P1.

[0025] The present invention has the following beneficial effects:

[0026] This invention detects the voltage and current of an LED flash and determines whether the LED flash is malfunctioning. When malfunction occurs, the flash frequency can be doubled and an audible alert is emitted.

[0027] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 is a circuit connection diagram of a digital LED flasher controlled by a buzzer for motorcycles according to the present invention;

[0030] Figure 2 is a circuit diagram of a digital LED flasher with buzzer control for motorcycles according to the present invention;

[0031] Figure 3 is Figure 2 Amplified circuit diagram of the middle terminal block and buzzer drive circuit;

[0032] Figure 4 is a program logic diagram burned into the chip U2 of the present invention.

[0033] The attached diagram lists the components represented by each number as follows:

[0034] 1. Power supply voltage regulator circuit; 2. Lamp-off voltage sampling circuit; 3. Flash control circuit; 4. Lamp-off current sampling circuit; 5. Load short-circuit protection circuit; 6. Buzzer drive circuit. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Please refer to Figure 1- Figure 3 As shown, this invention is a digital LED flasher with buzzer control for motorcycles, including a power supply regulator circuit 1, a lamp-down voltage sampling circuit 2, a lamp-down current sampling circuit 4, an MCU circuit, a load short-circuit protection circuit 5, a flashing frequency control circuit 3, and a buzzer driver circuit 6; the MCU circuit is electrically connected to the power supply regulator circuit 1, the lamp-down voltage sampling circuit 2, the lamp-down current sampling circuit 4, the load short-circuit protection circuit 5, and the flashing frequency control circuit 3 respectively;

[0037] The MCU circuit includes chip U2, which has pins 1, 2, 3, 4, 5, 6, 7, and 8.

[0038] Power supply regulator circuit 1: Its function is to regulate voltage and provide a stable voltage to other circuits or components;

[0039] The power supply regulator circuit 1 includes diode D1, capacitor C1, capacitor C2, capacitor C5, resistor R4, resistor R5, resistor R6, resistor R7, transistor Q1, and chip U1.

[0040] Flash control circuit 3: includes a switching transistor Q3, which controls the switching transistor Q3 to turn on and off through the signal provided by the MCU circuit, thereby realizing the flashing of the flash lamp;

[0041] The flash control circuit 3 includes transistor Q2, switching transistor Q3, resistors R8, R9, and R10, and Zener diode Z3. The base of transistor Q2 is connected to pin 7 of chip U2 through resistor R8. The collector of transistor Q2 is connected to the positive terminal of the voltage source through resistors R10 and R9. The emitter of transistor Q2 is grounded. The gate of switching transistor Q3 is connected between resistors R9 and R10, and its source is connected to the positive terminal of the voltage source.

[0042] The positive terminal of the voltage source and the drain terminal are electrically connected to the turn signal switch through resistor R22; Zener diode Z3 is connected between the gate and source of switch Q3.

[0043] Flash voltage sampling circuit 2: Its function is to detect whether the flash has fallen off. When the flash falls off, it sends a flash signal to the MCU circuit. Together with flash current sampling circuit 4, it drives chip U2 and sends a pulse signal to flash control circuit 3 through pin 7 of drive chip U2 to control the flash to blink.

[0044] The lamp-down voltage sampling circuit 2 includes resistors R1, R2, R3, capacitor C8, and Zener diode Z1. Diode D1 is connected in series with resistors R1, R3, and R2. Capacitor C8 and Zener diode Z1 are both connected in parallel with resistor R2. Resistor R2 and resistor R3 are connected to pin 3 of chip U2.

[0045] Flash current sampling circuit 4: Its function is to detect whether the flash has fallen off. When the flash falls off, it sends a flash failure signal to the MCU circuit. Together with flash voltage sampling circuit 2, it drives chip U2 and sends a pulse signal to flash control circuit 3 through pin 7 of driver chip U2 to control the flash to blink.

[0046] The lamp-drop current sampling circuit 4 includes two chips U3, namely U3A and U3B. Both chips U3A and U3B are amplifiers. The non-inverting input of chip U3B is connected to the emitter of transistor Q2 through resistor R19, and is connected to the diverter switch through resistors R20 and R22. The inverting input of chip U3B is connected to the diverter switch through resistor R21. A capacitor C11 is connected in parallel with resistor R22. The output of chip U3B is connected to the non-inverting input of chip U3A through resistor R17. The inverting input of chip U3A is connected to the output of chip U3A through resistor R16. The output of chip U3A is connected to pin 5 of chip U2 through resistor R15. Pin 5 of chip U2 is grounded through parallel capacitor C9 and Zener diode Z5. The inverting input of chip U3A is grounded through resistor R26.

[0047] Load short-circuit protection circuit 5: Its function is to provide power to chip U2 when the positive and negative terminals of the flash lamp are short-circuited.

[0048] Pin 6 provides a signal, which is processed by chip U2, and the flash is controlled by pin 7 of chip U2.

[0049] The load short-circuit protection circuit 5 includes resistors R18, R27, and R25, diode D2, and Zener diode Z6. The inverting input terminal of chip U3B is connected to pin 6 of chip U2 in sequence through resistors R18, R27, and diode D2. Pin 6 of chip U2 is grounded through resistor R25 and Zener diode Z6 connected in parallel. The output terminal of chip U3B is connected between resistors R18 and R27.

[0050] Buzzer drive circuit 6: includes several buzzers, which are used to sound when the left or right turn switch or emergency switch is turned on, and to alert the user in conjunction with the flashing lights.

[0051] It also includes a terminal block P1 and a voltage source, which is electrically connected to various circuits and electrical components through the terminal block P1. The voltage source is a 12V DC voltage source.

[0052] The positive terminal of the voltage source is grounded in sequence through diode D1, and parallel capacitors C1 and C2; the collector of transistor Q1 is connected to the high level VCC and is connected between diode D1 and capacitor C1 through resistor R4; the emitter of transistor Q1 is connected to the high level VDD and is grounded through series resistors R6 and R7.

[0053] The high-level voltage VDD is grounded through capacitor C5; chip U1 is a triode thyristor, with its anode grounded, its cathode connected to the base of transistor Q1, and its control electrode connected between resistors R6 and R7.

[0054] The terminal block P1 includes pins 1, 2, 3, 4, 5, 6, 7, and 8; the buzzer drive circuit 6 includes buzzers D3, D4, D5, and D6. Buzzers D3 and D5, which are connected in series, are connected between pins 1 and 6 of terminal block P1, and buzzers D4 and D6, which are also connected in series, are connected between pins 1 and 6 of terminal block P1.

[0055] The directional switch is a single-pole double-throw three-pole switch, comprising one moving contact, two stationary contacts, and one unused contact. The moving contact is connected to pins 4 and 5 of terminal P1, and the two stationary contacts are connected to pins 2 and 3 of terminal P1, respectively. Pin 1 of terminal P1 is connected via a...

[0056] The emergency switch is connected to the moving contact of the turn signal switch; the left and right LED flashlights are connected to pins 2 and 3 of terminal P1, respectively. When the turn signal switch is in contact with a stationary contact, the LED flashlight on one side is turned on and flashes with the waveform signal transmitted by pins 4 and 5 of the terminal. When the moving contact is in contact with the empty contact, the LED flashlight is not turned on.

[0057] As shown in Figures 1-3, taking a 1W LED flashing light as an example, two LED flashing lights are connected to pins 2 and 3 of terminal P1.

[0058] When one of the LED flashing lights fails, the current in this circuit flows sequentially from the drain of the switching transistor Q3 → the source of the switching transistor Q3 → resistor R22 → the positive terminal of the LED flashing light → ground. At this time, the current is sampled by resistors R20 and R21 and compared with the non-inverting and inverting input terminals of chip U3B. After performing differential operation, chip U3B outputs a differential value signal and transmits the differential value signal to the non-inverting input terminal of chip U3A. After comparison with the inverting input terminal of chip U3A, the output terminal of chip U3A outputs a control signal to pin 5 of chip U2.

[0059] Meanwhile, the voltage from the voltage source passes through diode D1 → resistor R1 → resistor R3 → resistor R2. After being divided by resistors R1, R3, and R2, it is filtered by capacitor C8 and regulated by Zener diode Z1 before being input to pin 3 of chip U2.

[0060] Chip U2 collects signals from pins 5 and 3 for identification to determine if the LED has fallen off. Since the LED has fallen off, a control signal is output from pin 7 of chip U2. This signal is then switched on and off by the switching transistor Q3 of the strobe control circuit to control the LED connected to the circuit to blink at a multiplied frequency.

[0061] like Figure 4 As shown, after the circuit is turned on, chip U2 completes initialization and continuously checks for a flashing indicator signal. When no flashing indicator is detected, the LED flashing light remains off. When a flashing indicator signal is detected, the power supply voltage is sampled, and the LED flashing light is turned on simultaneously.

[0062] The circuit performs overcurrent detection. If the overcurrent detection passes, it waits to turn off the LED flashing light. If the overcurrent detection fails, it checks whether the LED flashing light has turned off. If it has turned off, it sends a flashing indicator signal; otherwise, it does nothing.

[0063] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0064] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A digital LED flasher with buzzer control for motorcycles, characterized in that: It includes a power supply voltage regulator circuit (1), a lamp-down voltage sampling circuit (2), a lamp-down current sampling circuit (4), an MCU circuit, a load short-circuit protection circuit (5), a flash control circuit (3), and a buzzer drive circuit (6); the MCU circuit is electrically connected to the power supply voltage regulator circuit (1), the lamp-down voltage sampling circuit (2), the lamp-down current sampling circuit (4), the load short-circuit protection circuit (5), and the flash control circuit (3), respectively. The MCU circuit includes a chip U2, which has pins 1, 2, 3, 4, 5, 6, 7, and 8. The power supply regulator circuit (1) is used to regulate voltage and supply power to other circuits or components. The flash control circuit (3) includes a switching transistor Q3, which controls the switching transistor Q3 to turn on and off through the signal provided by the MCU circuit, thereby realizing the flash of the flash lamp; The flash voltage sampling circuit (2) is used to detect whether the flash has fallen off. When the flash falls off, it sends a flash signal to the MCU circuit and works with the flash current sampling circuit (4) to drive the chip U2. The flash current sampling circuit (4) is used to detect whether the flash has fallen off. When the flash falls off, it sends a flash-off signal to the MCU circuit and works with the flash voltage sampling circuit (2) to drive the chip U2. The load short-circuit protection circuit (5) is used to provide a signal to pin 6 of chip U2 when the positive and negative terminals of the flash lamp are short-circuited. The buzzer drive circuit (6) includes several buzzers, which are used to make a sound when the left or right turn switch or emergency switch is turned on; it also includes a terminal block P1 and a voltage source, wherein the voltage source is electrically connected to each circuit and electrical component through the terminal block P1, and the voltage source is a 12V DC voltage source.

2. A digital LED flasher with buzzer control for motorcycles according to claim 1, characterized in that, The power supply regulator circuit (1) includes diode D1, capacitor C1, capacitor C2, capacitor C5, resistor R4, resistor R5, resistor R6, resistor R7, transistor Q1, and chip U1. The positive terminal of the voltage source is grounded in sequence through diode D1, and parallel capacitors C1 and C2; the collector of transistor Q1 is connected to the high level VCC and is connected between diode D1 and capacitor C1 through resistor R4; the emitter of transistor Q1 is connected to the high level VDD and is grounded through series resistors R6 and R7. The high-level VCC is grounded through capacitor C5; chip U1 is a triode thyristor, the anode of chip U1 is grounded, the cathode is connected to the base of transistor Q1, and the control electrode is connected between resistors R6 and R7.

3. A digital LED flasher with buzzer control for motorcycles according to claim 2, characterized in that, The lamp-down voltage sampling circuit (2) includes resistors R1, R2, R3, capacitor C8, and Zener diode Z1. The diode D1 is connected in series with resistors R1, R3, and R2. Capacitor C8 and Zener diode Z1 are both connected in parallel with resistor R2. Resistor R2 and resistor R3 are connected to pin 3 of chip U2.

4. A digital LED flasher with buzzer control for motorcycles according to claim 3, characterized in that, The flash control circuit (3) includes a transistor Q2, a switching transistor Q3, resistors R8, R9, and R10, and a Zener diode Z3. The base of transistor Q2 is connected to pin 7 of chip U2 through resistor R8. The collector of transistor Q2 is connected to the positive terminal of the voltage source through resistors R10 and R9 in sequence. The emitter of transistor Q2 is grounded. The gate of switching transistor Q3 is connected between resistors R9 and R10, the source is connected to the positive terminal of the voltage source, and the drain is electrically connected to the direction switch through resistor R22. Zener diode Z3 is connected between the gate and source of switching transistor Q3.

5. A digital LED flasher with buzzer control for motorcycles according to claim 4, characterized in that, The lamp-drop current sampling circuit (4) includes two chips U3, namely U3A and chip U3B. Both chips U3A and U3B are amplifiers. The non-inverting input terminal of chip U3B is connected to the emitter of transistor Q2 through resistor R19, and is connected to the diverter switch through resistors R20 and R22. The inverting input terminal of chip U3B is connected to the diverter switch through resistor R21. A capacitor C11 is connected in parallel with resistor R22. The output terminal of chip U3B is connected to the non-inverting input terminal of chip U3A through resistor R17. The inverting input terminal of chip U3A is connected to the output terminal of chip U3A through resistor R16. The output terminal of chip U3A is connected to pin 5 of chip U2 through resistor R15. Pin 5 of chip U2 is grounded through parallel capacitor C9 and Zener diode Z5. The inverting input terminal of chip U3A is grounded through resistor R26.

6. A digital LED flasher with buzzer control for motorcycles according to claim 5, characterized in that, The load short-circuit protection circuit (5) includes resistors R18 and R27. Resistor R25, diode D2, and Zener diode Z6 are connected to the inverting input terminal of chip U3B via resistor R18, resistor R27, and diode D2, which are then connected to pin 6 of chip U2. Pin 6 of chip U2 is grounded via resistor R25 and Zener diode Z6 connected in parallel. The output terminal of chip U3B is connected between resistor R18 and resistor R27.

7. A digital LED flasher with buzzer control for motorcycles according to claim 6, characterized in that, The terminal block P1 includes pins 1, 2, 3, 4, 5, 6, 7, and 8; the buzzer drive circuit (6) includes buzzers D3, D4, D5, and D6. Buzzers D3 and D5, which are connected in series, are connected between pins 1 and 6 of terminal block P1, and buzzers D4 and D6, which are also connected in series, are connected between pins 1 and 6 of terminal block P1.

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