Meteor lamp synchronization circuit

Abstract

The utility model discloses a meteor lamp synchronous circuit which comprises an AC / DC conversion circuit, a single-chip microcomputer circuit and an output circuit which are connected in sequence. The AC / DC conversion circuit is used for converting input alternating current into stable direct current; the input end of the output circuit is connected with the output end of the single-chip microcomputer circuit, the output end of the output circuit is connected with a plurality of light bars in parallel, and each light bar is provided with a driving chip used for controlling on and off of a plurality of light beads distributed on the light bar. The single-chip microcomputer circuit is used for generating PWM signals for controlling on-off of the output end of the output circuit according to program setting. According to the meteor lamp synchronization circuit, the meteor lamp can be kept synchronous without depending on an external synchronization signal line, the synchronization problem caused by errors of a built-in oscillator between chips can be solved, the universality and flexibility of a meteor lamp system can be greatly improved, a more convenient control mode is provided for lamps of different manufacturers, and the reliability of the meteor lamp system is improved. Product design is simplified, cost is reduced, and user experience is improved.

Description

Technical Field

[0001] This utility model belongs to the field of control circuits, and in particular relates to a meteor lamp synchronization circuit. Background Technology

[0002] Meteor lights, also known as meteor shower lights, are decorative lighting devices widely used in festivals, architectural decorations, and interior design. They simulate the effect of falling meteors by sequentially lighting and extinguishing LED beads, creating a dynamic and visually impactful effect. To achieve this effect, meteor lights use pulse width modulation (PWM) waveforms to control the brightness of the LEDs, employing multi-channel sequential cyclic control to create changing lighting effects such as meteor showers or water droplets. With advancements in LED technology, the brightness, color, and expressive power of meteor lights have continuously improved, gradually becoming an important element in modern lighting design.

[0003] However, in practical applications, meteor lights are typically composed of multiple control units or LED driver chips, and these chips have a certain clock error. Manufacturing deviations in the chip's built-in oscillators cause the working cycles of different chips to be inconsistent, resulting in accumulated time errors and causing the light string to operate out of sync. This asynchrony directly affects the meteor light's effect, especially in large-scale light strings or complex effect scenes, where the visually uneven flow is very noticeable, ruining the intended dynamic lighting effect.

[0004] To address this issue, existing synchronous control methods typically employ synchronous signal transmission technology. Specifically, each LED string usually requires a control port, continuously sending synchronous signals to ensure consistent operating states across all LED strings. While this method guarantees synchronization to some extent, it has significant drawbacks. First, because different manufacturers use varying synchronization protocols and control methods for their meteor lights, synchronization requires specific controllers from particular manufacturers, greatly reducing product compatibility and versatility. Second, traditional synchronous signal transmission methods require additional synchronization lines, increasing system complexity and cost, and making LED string wiring more cumbersome and inflexible. Utility Model Content

[0005] To address the aforementioned technical problems, this invention provides a meteor lamp synchronization circuit, aiming to achieve synchronization of meteor lamps without relying on external synchronization signal lines through a microcontroller control circuit and a button adjustment circuit. This design not only overcomes the synchronization problem caused by errors in the built-in oscillators between chips, but also significantly improves the versatility and flexibility of the meteor lamp system, providing a more convenient control method for lamps from different manufacturers, thereby simplifying product design, reducing costs, and improving user experience.

[0006] The specific technical solution provided by this utility model is as follows:

[0007] A meteor light synchronization circuit includes an AC / DC conversion circuit, a microcontroller circuit, and an output circuit connected in sequence. The AC / DC conversion circuit converts input AC power into stable DC power. The input terminal of the output circuit is connected to the output terminal of the microcontroller circuit, and the output terminal of the output circuit is connected in parallel with several light strips for achieving a meteor effect. Each light strip is equipped with a driver chip for controlling the on / off state of multiple LEDs distributed on the light strip. The microcontroller circuit generates a PWM signal to control the on / off state of the output terminal of the output circuit according to a program setting.

[0008] Furthermore, the microcontroller circuit includes several buttons connected to the microcontroller, which are used to set parameters for the on / off time of the output terminal of the control output circuit.

[0009] Furthermore, the AC / DC conversion circuit includes a bridge rectifier module and a transformer module. The bridge rectifier module is used to convert the input AC power into DC power, and the transformer module is used to convert the DC power into a specified DC voltage.

[0010] Furthermore, the output circuit includes a switching transistor, the gate of which is connected to the PWM output port of the microcontroller circuit, the drain of which serves as the output terminal for connecting the light strip and its driver chip, and the source of which is grounded.

[0011] Compared with the prior art, the present invention has at least the following beneficial effects:

[0012] 1. No synchronization cable required, simplifying wiring and installation.

[0013] Traditional meteor light systems require connecting multiple light strings together via synchronization lines and rely on synchronization signals to maintain consistent lighting effects. Due to differences in control protocols among manufacturers, dedicated controllers are often needed for synchronization, which not only increases system complexity but also limits product versatility and flexibility. This design, however, completely eliminates the need for synchronization lines by employing microcontroller control and button adjustment, achieving wireless synchronization between light strings and greatly simplifying the wiring and installation process.

[0014] 2. Solve the synchronization problem caused by oscillator error.

[0015] Due to the inherent error of the oscillator in each meteor light chip, traditional systems suffer from uneven light flow and inconsistent lighting times between different chips. This design utilizes a microcontroller program to effectively avoid the impact of the inherent oscillator error on synchronization, ensuring that multiple light strings flow synchronously during operation, achieving the desired meteor effect and enhancing the user experience.

[0016] 3. Improve system versatility and compatibility

[0017] Existing technologies often rely on manufacturer-specific control protocols and synchronization methods, leading to incompatibility between products from different manufacturers and limiting consumer choice. By using a microcontroller as the main control unit and employing a simple button adjustment method, this design greatly improves the system's versatility and compatibility, enabling it to adapt to lighting fixtures from different manufacturers without relying on a dedicated controller. Users can freely adjust the lighting effects, enhancing the product's market adaptability.

[0018] 4. Reduce costs and increase flexibility

[0019] Traditional designs require a dedicated synchronization controller for each light string, increasing costs and reducing product flexibility. This design, however, utilizes a microcontroller to achieve synchronous control of multiple light strings at a lower cost. It also provides users with the ability to adjust lighting effects via buttons, increasing product flexibility and operability. Users can adjust the power-on and power-off times of the lights, as well as meteor effects, making the product more versatile. Attached Figure Description

[0020] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0021] Figure 1 This is a schematic diagram of the circuit framework provided in one embodiment of the present invention;

[0022] Figure 2 This is a circuit diagram provided in one embodiment of the present invention. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] like Figure 1As shown, the meteor light synchronization circuit provided in this embodiment mainly includes an AC / DC conversion circuit, a microcontroller circuit, and an output circuit connected in sequence. The AC / DC conversion circuit converts the input AC power into stable DC power for use by subsequent circuits. The input terminal of the output circuit is connected to the output terminal of the microcontroller circuit, and several light strips for achieving the meteor effect are connected in parallel to the output terminal of the output circuit. Each light strip is equipped with a driver chip for controlling the on / off state of multiple LEDs distributed on the light strip.

[0025] During the control process, due to differences in the error of the built-in oscillators in the driver chips, cumulative time errors occur between the driver chips of each light strip, resulting in uneven lighting effects after a period of time. In traditional solutions, a control terminal is provided for each light strip segment, continuously sending synchronization signals for control processing. However, because the synchronization protocols and methods of driver chips from different manufacturers are not entirely consistent, it is necessary to purchase a dedicated controller from a different manufacturer, which greatly reduces the product's versatility and flexibility.

[0026] To address the synchronization issue of the driver chips, this embodiment employs a short-term power-off method. After a certain period, the driver chips of each LED strip are simultaneously powered off, forcing each driver chip to automatically reset upon power-up, thereby eliminating the cumulative time error between the driver chips. Specifically, this embodiment uses a microcontroller circuit to control the on / off state of the output terminal of the output circuit to achieve the automatic reset of each LED strip driver chip. The microcontroller circuit, according to the set time in the microcontroller program, powers off and then powers on the output terminal of the output circuit, causing the chip to reset.

[0027] like Figure 2 The diagram shown is a circuit diagram of the meteor lamp synchronization circuit in this embodiment.

[0028] 1. AC / DC conversion circuit

[0029] This circuit section converts AC to DC, providing a stable operating voltage for the entire circuit. The input AC power is converted to DC by a bridge rectifier module (DB1 MB6S), outputting a pulsating DC signal. Capacitors (C1 and C3) smooth the rectified DC voltage. The switching power supply controller (U4 TMP0265) controls the operation of the high-frequency transformer to achieve regulated output. The COMP and CS pins of U4 are used for voltage feedback and current sensing to ensure stable output voltage. Voltage isolation is achieved through the high-frequency transformer, while simultaneously generating the required DC voltage. Diode D7 and filter capacitor C15 are used to rectify and smooth the output of the high-frequency transformer, providing a stable 5V DC voltage to power the subsequent microcontroller and control circuits.

[0030] 2. Microcontroller circuit

[0031] This part is the core of the circuit, used to control the output signals through the microcontroller program, thereby realizing the timed on / off control of the output circuit. The microcontroller (U1 MCU1832) is a low-power microcontroller responsible for receiving button signals (S1, S2) and generating PWM control signals.

[0032] Buttons S1 and S2 are connected to the microcontroller's input pins and are prevented from floating by pull-up resistors (R8 and R9). Buttons S1 and S2 are used to set the timing parameters (power-on and power-off times) in the microcontroller program. The microcontroller outputs a PWM signal to the output circuit according to the program logic. A decoupling capacitor (C16) is also connected in series between the microcontroller's power input terminal and ground terminal for filtering the microcontroller's power supply, suppressing power supply noise, and improving system stability.

[0033] 3. Output circuit

[0034] The output circuit receives the PWM signal generated by the microcontroller and drives several LED strips and their driver chips connected in parallel at its output terminal. A transistor (Q1 AO3400) acts as a switching device, controlling the on / off state of the output terminal according to the PWM signal. Specifically, its gate is connected to the PWM output port of the microcontroller, controlling the switching of Q1 via the signal; its drain serves as the output terminal for connecting the meteor LED strip; and its source is grounded. Voltage divider resistors (R11 and R12) are used to stabilize and adjust the gate voltage of the MOSFET, ensuring that the PWM signal can effectively control the switching of Q1.

[0035] The entire circuit's workflow is as follows:

[0036] The input AC power is converted to DC power through a rectifier bridge and filter network, and then output as a stable 5V DC power supply through a TMP0265 chip and a high-frequency transformer. The microcontroller generates a PWM signal according to a preset program. This PWM signal drives the LED strip and its driver chip through transistor Q1, controlling the on / off state and flow effects of the lights. Precise power-on and power-off control of the LED string is achieved through the microcontroller program, avoiding cumulative time errors caused by oscillator errors between chips, thus achieving LED string synchronization.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; under the concept of this utility model, the technical features of the above embodiments or different embodiments can also be combined, and there are many other variations of different aspects of this utility model as described above. For the sake of brevity, they are not provided in detail; although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A meteor lamp synchronization circuit, characterized by, The application relates to an AC / DC conversion circuit, a single-chip microcomputer circuit and an output circuit connected in sequence; the AC / DC conversion circuit is used for converting input alternating current into stable direct current; the input end of the output circuit is connected with the output end of the single-chip microcomputer circuit, and the output end of the output circuit is connected in parallel with a plurality of light strips used for realizing meteor shower effects; the light strips are all provided with driving chips used for controlling the on-off of a plurality of lamp beads distributed on the light strips; the single-chip microcomputer circuit is used for generating a PWM signal for controlling the on-off of the output end of the output circuit according to program setting.

2. A meteor lamp synchronization circuit as claimed in claim 1, characterized in that The single-chip microcomputer circuit comprises a plurality of keys connected with a single-chip microcomputer; the keys are used for setting parameters for controlling the on-off time of the output end of the output circuit.

3. A meteor lamp synchronization circuit as claimed in claim 1, characterized in that The AC / DC conversion circuit comprises a bridge rectifier module and a voltage transformation module; the bridge rectifier module is used for converting input alternating current into direct current; and the voltage transformation module is used for transforming the direct current into specified direct current voltage.

4. A meteor lamp synchronization circuit as claimed in claim 1, characterized in that The output circuit comprises a switching tube; the gate of the switching tube is connected with the PWM output port of the single-chip microcomputer circuit; the drain is used as an output end for connecting the light strips and the driving chips thereof; and the source is grounded.

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