CN221043278U - Flat voltage output and boost output circuit of solar street lamp - Google Patents
Flat voltage output and boost output circuit of solar street lamp Download PDFInfo
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- CN221043278U CN221043278U CN202322789853.5U CN202322789853U CN221043278U CN 221043278 U CN221043278 U CN 221043278U CN 202322789853 U CN202322789853 U CN 202322789853U CN 221043278 U CN221043278 U CN 221043278U
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Abstract
The utility model discloses a flat-voltage output and boost output circuit of a solar street lamp, which comprises a power supply circuit, an MCU, a flat-voltage output LED1, a boost circuit and a boost output LED2; the power supply circuit is connected with the MCU, the LED1 and the booster circuit; the output end of the boosting circuit is connected to the LED2, and the voltage of the power supply circuit is boosted to supply power to the LED 2. The utility model can output 3V voltage in a flat-voltage way, can boost and output 12V voltage at the same time, supplies power for different ornaments, does not need to additionally install a power supply board, and saves cost.
Description
Technical Field
The utility model relates to a street lamp LED lighting system, in particular to a solar street lamp flat-voltage output and boost output circuit.
Background
The existing street lamp often needs to be additionally provided with a lamp strip or ornaments such as Chinese knots, and in order to save cost and resources, the ornaments often need to be directly installed on the existing street lamp system. However, the existing street lamp system is flat-voltage output and generally outputs 3V voltage for power supply, the lamp band on the market is 3V or 12V, other ornaments such as Chinese knots are 12V, only the lamp band is installed, the existing decoration requirements are obviously not met, and the 12V lamp band or ornaments such as Chinese knots are installed on the existing street lamp system, so that a 12V power supply board is required to be additionally installed, and the cost is obviously increased.
Disclosure of utility model
In order to solve the defects in the prior art, the utility model provides a flat-voltage output and boost output circuit of a solar street lamp, which can output 3V voltage in a flat-voltage manner and boost output 12V voltage at the same time, so that power for different ornaments is supplied without additionally installing a power supply board, and the cost is saved.
In order to achieve the technical purpose, the utility model adopts the following technical scheme: a flat voltage output and boost output circuit of a solar street lamp comprises a power supply circuit, an MCU, an LED1 for flat voltage output, a boost circuit and an LED2 for boost output;
The power supply circuit is connected with the MCU, the LED1 and the booster circuit; the output end of the boosting circuit is connected to the LED2, and the voltage of the power supply circuit is boosted to supply power to the LED 2.
Further, the boost circuit comprises a boost chip U3; MCU's 8 foot connecting resistance R19, resistance R19 all the way connects triode Q2's base through resistance R20 ground, triode Q2's projecting pole ground connection, collector connecting resistance R18 all the way connects through resistance R17 the battery of supply circuit, resistance R18 other way connects switch tube M4's grid, switch tube M4's source connection supply circuit's battery, switch tube M4's the first way of drain electrode connects U3's 1 foot and 3 foot through electric capacity C8 ground, switch tube M4's the first way of drain electrode third way connects inductance L1, inductance L1's the drain electrode of connecting switch tube M5, switch tube M5's grid connects U3's 2 foot, switch tube M5's source ground connection, inductance L1 second way connects diode D3, diode D3 first way connecting resistance 21, resistance R21 first way connects U3's 7 foot, resistance R21 second way connects through resistance R22 ground, diode D3 second way connects three ways through electric capacity E2 ground, LED 3's 3 connects the positive pole, LED 23 connects R2, LED 23 connects the negative pole, LED 23 connects.
Further, the power supply circuit comprises a photovoltaic panel, a battery and a voltage stabilizer U1; the cathode of the battery is grounded, the anode is divided into five paths, a first path of the battery anode is connected to a 13 pin of the MCU through a resistor R4, a second path of the battery anode is connected to the anode of the LED1, a third path of the battery anode is connected to the drain electrode of the field effect transistor M2, a fourth path of the battery anode is connected to a1 pin of the voltage stabilizer U1 through a diode D2, and a fifth path of the battery anode is connected to a switch tube M4 of the boost circuit; the cathode of the photovoltaic panel is grounded, the anode is divided into three paths, the first path of the anode of the photovoltaic panel is connected to the 9 pins of the MCU through a resistor R6, the resistor R6 and the 10 pins of the MCU are commonly connected with a resistor R7, the resistor R7 is connected with a capacitor C5 in parallel and then grounded, the second path of the anode of the photovoltaic panel is connected to the 1 pin of a voltage stabilizer U1 through a diode D1, and the third path of the anode of the photovoltaic panel is connected to the drain electrode of a field effect transistor M1; the source electrode of the field effect transistor M2 is connected to the source electrode of the field effect transistor M1, the source electrode of the field effect transistor M2 is connected to the grid electrode of the field effect transistor M1 through a resistor R1, and the grid electrode of the field effect transistor M2 is connected to the grid electrode of the field effect transistor M1.
Further, pin 1 of the voltage stabilizer U1 is grounded through a capacitor C2, pin 2 is grounded, pin 3 is grounded through a capacitor C3 and a capacitor C4 which are connected in parallel, and pin 3 is connected to pin 1 of the MCU.
Further, the LED1 is connected with a conduction switch circuit, the conduction switch circuit comprises a field effect tube M3, the drain electrode of the field effect tube M3 is connected to the negative electrode of the LED1, the grid electrode is divided into two paths, the first path is connected to the 9 pin of the MCU through a resistor R12, the second path is grounded through a resistor R13, the source electrode is connected with a resistor R14, a resistor R15 and a resistor R16, the resistor R14, the resistor R15 and the resistor R16 are connected in parallel and then grounded, the source electrode is also connected with a resistor R11, one path of the resistor R11 is grounded through a capacitor C6, and the other path of the resistor R11 is connected to the 11 pin of the MCU.
Further, the MCU is further connected with an indicating circuit, the indicating circuit comprises a diode RL1, a diode GL1 and a diode TL1, the positive electrode of the diode RL1 is connected to the 4 pin of the MCU through a resistor R9, the negative electrode of the diode RL1 is grounded, the positive electrode of the diode GL1 is connected to the 5 pin of the MCU through a resistor R10, the negative electrode of the diode GL1 is grounded, and the positive electrode of the diode YL1 is connected to the 3 pin of the MCU through a resistor R8, and the negative electrode of the diode GL is grounded.
Further, the MCU is also connected with an infrared receiving head IR1, a1 foot of the infrared receiving head IR1 is connected with a1 foot of the MCU, a 2 foot of the infrared receiving head IR1 is connected with a 16 foot of the MCU, and a 3 foot of the infrared receiving head IR1 is connected with a 12 foot of the MCU.
Further, pin 12 of the MCU is grounded through a capacitor C7, pin 13 is grounded through a capacitor C1, and pin 13 is grounded through a resistor R8.
In summary, the present utility model achieves the following technical effects:
The utility model utilizes the photovoltaic panel, the battery and the voltage stabilizing chip of the power supply circuit to provide flat voltage for the LED1, is used for supplying power to ornaments such as a 3V lamp strip, and supplies power to ornaments such as 12V Chinese knots after being boosted by the booster circuit, thus being capable of meeting the voltage of most ornaments in the market, needing no additional power supply board and having lower cost.
Drawings
Fig. 1 is a schematic diagram of a flat-voltage output and boost output circuit of a solar street lamp according to an embodiment of the present utility model;
Fig. 2 is a schematic diagram of a boost circuit.
Detailed Description
The present utility model will be described in further detail with reference to the accompanying drawings.
The present embodiment is only for explanation of the present utility model and is not to be construed as limiting the present utility model, and modifications to the present embodiment, which may not creatively contribute to the present utility model as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present utility model.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
Examples:
as shown in FIG. 1, the flat voltage output and boost output circuit of the solar street lamp comprises a power supply circuit 1, an MCU, an LED1 for flat voltage output, a boost circuit 3 and an LED2 for boost output; the power supply circuit 1 is connected with the MCU, the LED1 and the booster circuit 3 and supplies power to the MCU, the LED1 and the booster circuit 3; the output end of the booster circuit 3 is connected to the LED2, and boosts the voltage of the power supply circuit 1 to supply power to the LED 2.
In the utility model, the power supply circuit 1 directly supplies power to the LED1, and can supply power to the 3V lamp strip as flat voltage 3V output, the booster circuit 3 supplies power to the LED2 after boosting, and can supply power to the 12V lamp strip or the 12V Chinese knot and the like as boosted 12V output, so that the flat voltage output and the boosted output coexist on one lighting system, the requirements of most ornaments in the market can be met, and the improvement of the old system is facilitated.
As shown in fig. 2, which is a schematic diagram of the booster circuit, the booster circuit 3 includes a booster chip U3. U3 adopts a boost chip of model HM 1539; MCU's 8 foot connecting resistance R19, resistance R19 all the way connects triode Q2's base through resistance R20 ground connection, triode Q2's projecting pole ground connection, collector connecting resistance R18, resistance R18 all the way connects power supply circuit 1's battery through resistance R17, switch tube M4's grid is connected to resistance R18 another way, switch tube M4's source connection power supply circuit 1's battery, switch tube M4's drain electrode first way connects U3's 1 foot and 3 foot through electric capacity C8 ground connection, switch tube M4's drain electrode third way connection inductance L1, switch tube M5's drain electrode is connected to inductance L1 first way, switch tube M5's grid connection U3's 2 foot, switch tube M5's source ground connection, inductance L1 second way connection diode D3, diode D3 first way connecting resistance 21, resistance R21 first way connection U3's 7 foot, resistance R21 second way connects through resistance R22 ground connection, diode D3 second way connects through electric capacity E2 ground connection, three way diode D3's 2, LED 23 connects the positive electrode, LED 23 connects the negative electrode of LED 23, the LED is connected to the negative electrode of 23.
The U2 is used as an MCU, the 8 pins of the U2 output signals to R19, the R19 is used as a driving resistor for driving Q2, the 8 pins of the U2 output high level, so that the Q2 is conducted, the M4 is driven to be conducted, the whole booster circuit is enabled to operate, and power is supplied to the output voltage of the LED 2.
The LED power supply circuit is characterized in that C8 is a filter capacitor, R19 and R20 are voltage dividing resistors, L1 is an energy storage inductor, M5 is a switching tube, D3 is an anti-reverse diode, the resistance ratio of R21 and R22 can be adjusted, so that output voltage is adjusted to be supplied to the LED2, E2 is the energy storage capacitor, R23 is a limiting resistor, the 8 pins of U3 collect current of the LED2, and the 1 pin and the 3 pin of the U3 of the next person commonly output constant voltage current to supply the LED2 as constant voltage power.
The power supply circuit 1 comprises a photovoltaic panel, a battery and a voltage stabilizer U1; the cathode of the battery is grounded, the anode is divided into five paths, a first path of the battery anode is connected to a 13 pin of the MCU through a resistor R4, a second path of the battery anode is connected to the anode of the LED1, a third path of the battery anode is connected to the drain electrode of the field effect transistor M2, a fourth path of the battery anode is connected to a1 pin of the voltage stabilizer U1 through a diode D2, and a fifth path of the battery anode is connected to a switch tube M4 of the boost circuit 3; the cathode of the photovoltaic panel is grounded, the anode is divided into three paths, the first path of the anode of the photovoltaic panel is connected to the 9 pins of the MCU through a resistor R6, the resistor R6 and the 10 pins of the MCU are commonly connected with a resistor R7, the resistor R7 is connected with a capacitor C5 in parallel and then grounded, the second path of the anode of the photovoltaic panel is connected to the 1 pin of a voltage stabilizer U1 through a diode D1, and the third path of the anode of the photovoltaic panel is connected to the drain electrode of a field effect transistor M1; the source electrode of the field effect transistor M2 is connected to the source electrode of the field effect transistor M1, the source electrode of the field effect transistor M2 is connected to the grid electrode of the field effect transistor M1 through a resistor R1, and the grid electrode of the field effect transistor M2 is connected to the grid electrode of the field effect transistor M1.
R1 is the pull-up resistor of M1, M2, can clamp the grid of M1, M2 at high level by an uncertain signal through a resistor, guarantee that when no other signal is input, M1 and M2 are in the closed conduction state.
The grid electrode of the field effect transistor M2 is also connected with the collector electrode of the triode Q1, the emitter electrode of the triode Q1 is grounded, the base electrode is connected to the 6 pin of the MCU through the resistor R3, and meanwhile, the base electrode is grounded through the resistor R2. Q1 is NPN triode, Q1 can control the conducting state of M1, M2 and adjust corresponding duty ratio. R2 is a pull-down resistor of Q1, so that Q1 can be always turned off when a signal is not determined, and R3 is a driving resistor of MCU to a base electrode of Q1.
The 1 foot of the voltage stabilizer U1 is grounded through a capacitor C2, the 2 foot is grounded, the 3 foot is grounded after passing through a capacitor C3 and a capacitor C4 which are connected in parallel, and the 3 foot is connected to the 1 foot of the MCU. C2 is the filter capacitor of the U1 input voltage, and C3 and C4 are the filter capacitors of the U1 output voltage.
D1, D2 are schottky diode, and photovoltaic board and battery can be the MCU power supply of core simultaneously, prevent that the battery from being unable to supply power to MCU when putting excessively to the photovoltaic board is unable to charge to the battery, also avoids the photovoltaic board to battery direct charging and battery to the photovoltaic board discharge. M1, M2 are P channel field effect transistor, play the control in the in-process that photovoltaic board charges the battery and open the effect of closing the charge, also adjust the charge current and prevent reverse discharge's effect.
The LED1 is connected with the on-switch circuit 2, the on-switch circuit 2 comprises a field effect tube M3, the drain electrode of the field effect tube M3 is connected to the cathode of the LED1, the grid electrode is divided into two paths, the first path is connected to the 9 pin of the MCU through a resistor R12, the second path is grounded through a resistor R13, the source electrode is connected with a resistor R14, a resistor R15 and a resistor R16, the resistor R14, the resistor R15 and the resistor R16 are grounded after being connected in parallel, the source electrode is also connected with a resistor R11, one path of the resistor R11 is grounded through a capacitor C6, and the other path is connected to the 11 pin of the MCU.
M3 is N channel field effect transistor, can control the on state of LED1, controls the drive current of LED1, namely the luminance of load light source through adjusting the duty cycle of M3 grid.
R12 is the driving resistance of the M3 grid, R13 is the pull-down resistance of the M3 grid, and the M3 is in a closed state, namely the LED1 light source board is in a stable closed state, while the M3 grid is not determined to be in a signal. In this embodiment, R14, R15, R16 are sampling resistors of the LED discharge current, R11 is a protection resistor of the MCU for sampling the LED discharge current, and C6 has a sampling filtering effect.
The MCU is also connected with an indicating circuit, the indicating circuit comprises a diode RL1, a diode GL1 and a diode TL1, the positive electrode of the diode RL1 is connected to the 4 pin of the MCU through a resistor R9, the negative electrode is grounded, the positive electrode of the diode GL1 is connected to the 5 pin of the MCU through a resistor R10, the negative electrode is grounded, and the positive electrode of the diode YL1 is connected to the 3 pin of the MCU through a resistor R8, and the negative electrode is grounded.
R9 is the current limiting resistor of the red indicator lamp. R10 is the current limiting resistor of the green indicator lamp. R8 is the current limiting resistor of the yellow indicator lamp. RL1 is a red indicator light to indicate whether there is a power deficiency. GL1 is a green indicator light that indicates whether the battery is in a charged state and whether the battery is fully charged. YL1 is a yellow indicator light indicating a normal operating condition.
The MCU is also connected with an infrared receiving head IR1, a 1 pin of the infrared receiving head IR1 is connected with a 1 pin of the MCU, a 2 pin of the infrared receiving head IR1 is connected with a 16 pin of the MCU, and a 3 pin of the infrared receiving head IR1 is connected with a 12 pin of the MCU. The IR1 is an infrared receiving head, can receive the transmitting signal of the infrared remote controller, and can control the switch of the LED load light source and adjust the corresponding mode and power through MCU decoding.
The 12 pin of the MCU is grounded through a capacitor C7, the 13 pin is grounded through a capacitor C1, and the 13 pin is grounded through a resistor R8. The positive pole of battery is connected to 13 feet of MCU through resistance R4, and R4 and R5 are the divider sampling resistance of battery voltage, and C1 plays the effect of sampling filtering.
In the market, a street lamp system with flat voltage output is generally used, only components with one voltage can be satisfied, and once components with other voltages need to be replaced or installed, the whole system needs to be replaced or a power supply board is additionally installed, so that resources are consumed and the cost is high in any mode. The lighting system can adapt to most of components in the market, the whole system does not need to be replaced or a power supply board is additionally arranged, the cost is saved, and the old system is improved.
The foregoing description is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model in any way, and any simple modification, equivalent variation and modification made to the above embodiments according to the technical principles of the present utility model are within the scope of the technical solutions of the present utility model.
Claims (8)
1. A solar street lamp flat-voltage output and boost output circuit is characterized in that: the LED power supply device comprises a power supply circuit (1), an MCU, a flat voltage output LED1, a booster circuit (3) and a boost output LED2;
The power supply circuit (1) is connected with the MCU, the LED1 and the booster circuit (3); the output end of the boosting circuit (3) is connected to the LED2, and the voltage of the power supply circuit (1) is boosted to supply power to the LED 2.
2. The solar street lamp flat-voltage output and boost output circuit according to claim 1, wherein: the boost circuit (3) comprises a boost chip U3; MCU's 8 foot connecting resistance R19, resistance R19 all the way connects triode Q2's base through resistance R20 ground, and triode Q2's projecting pole ground connection, collector connecting resistance R18 all the way connects through resistance R17 the battery of supply circuit (1), and resistance R18 connects switch tube M4's grid on the other way, switch tube M4's source connection supply circuit (1) battery, switch tube M4's the first way of drain electrode ground through electric capacity C8, switch tube M4's drain electrode second way connects U3's 1 foot and 3 foot, switch tube M4's the third way of drain electrode connecting inductance L1, and inductance L1's the first way of connecting switch tube M5's drain electrode, switch tube M5's grid connects U3's 2 foot, switch tube M5's source ground connection diode L1 second way, diode D3's first connecting resistance 21, switch tube R21's first way connects U3's 7 foot, and resistance R21 second way connects through resistance R22 ground, diode D3 second way E2 connects three ways electric capacity D3, LED 23 connects the positive electrode, LED 23 connects through electric capacity D2, and LED 23 connects.
3. The solar street lamp flat-voltage output and boost output circuit according to claim 2, wherein: the power supply circuit (1) comprises a photovoltaic panel, a battery and a voltage stabilizer U1; the cathode of the battery is grounded, the anode is divided into five paths, a first path of the battery anode is connected to a 13 pin of the MCU through a resistor R4, a second path of the battery anode is connected to the anode of the LED1, a third path of the battery anode is connected to the drain electrode of the field effect transistor M2, a fourth path of the battery anode is connected to a 1 pin of the voltage stabilizer U1 through a diode D2, and a fifth path of the battery anode is connected to a switching tube M4 of the boost circuit (3); the cathode of the photovoltaic panel is grounded, the anode is divided into three paths, the first path of the anode of the photovoltaic panel is connected to the 9 pins of the MCU through a resistor R6, the resistor R6 and the 10 pins of the MCU are commonly connected with a resistor R7, the resistor R7 is connected with a capacitor C5 in parallel and then grounded, the second path of the anode of the photovoltaic panel is connected to the 1 pin of a voltage stabilizer U1 through a diode D1, and the third path of the anode of the photovoltaic panel is connected to the drain electrode of a field effect transistor M1; the source electrode of the field effect transistor M2 is connected to the source electrode of the field effect transistor M1, the source electrode of the field effect transistor M2 is connected to the grid electrode of the field effect transistor M1 through a resistor R1, and the grid electrode of the field effect transistor M2 is connected to the grid electrode of the field effect transistor M1.
4. A solar street lamp flat-voltage output and boost output circuit according to claim 3, wherein: the 1 foot of the voltage stabilizer U1 is grounded through a capacitor C2, the 2 foot is grounded, the 3 foot is grounded after passing through a capacitor C3 and a capacitor C4 which are connected in parallel, and the 3 foot is connected to the 1 foot of the MCU.
5. The solar street lamp flat-voltage output and boost output circuit according to claim 4, wherein: the LED1 is connected with a conduction switch circuit (2), the conduction switch circuit (2) comprises a field effect tube M3, the drain electrode of the field effect tube M3 is connected to the cathode of the LED1, the grid electrode is divided into two paths, the first path is connected to the 9 pins of the MCU through a resistor R12, the second path is grounded through a resistor R13, the source electrode is connected with a resistor R14, a resistor R15 and a resistor R16, the resistor R14, the resistor R15 and the resistor R16 are grounded after being connected in parallel, the source electrode is also connected with a resistor R11, one path of the resistor R11 is grounded through a capacitor C6, and the other path is connected to the 11 pins of the MCU.
6. The solar street lamp flat-voltage output and boost output circuit according to claim 5, wherein: the MCU is further connected with an indicating circuit, the indicating circuit comprises a diode RL1, a diode GL1 and a diode TL1, the positive electrode of the diode RL1 is connected to the 4 pin of the MCU through a resistor R9, the negative electrode is grounded, the positive electrode of the diode GL1 is connected to the 5 pin of the MCU through a resistor R10, the negative electrode is grounded, the positive electrode of the diode YL1 is connected to the 3 pin of the MCU through a resistor R8, and the negative electrode is grounded.
7. The solar street lamp flat-voltage output and boost output circuit according to claim 6, wherein: the MCU is also connected with an infrared receiving head IR1, a1 foot of the infrared receiving head IR1 is connected with a1 foot of the MCU, a 2 foot of the infrared receiving head IR1 is connected with a 16 foot of the MCU, and a3 foot of the infrared receiving head IR1 is connected with a12 foot of the MCU.
8. The solar street lamp flat-voltage output and boost output circuit according to claim 7, wherein: the 12 feet of the MCU are grounded through a capacitor C7, the 13 feet are grounded through a capacitor C1, and the 13 feet are grounded through a resistor R8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322789853.5U CN221043278U (en) | 2023-10-17 | 2023-10-17 | Flat voltage output and boost output circuit of solar street lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322789853.5U CN221043278U (en) | 2023-10-17 | 2023-10-17 | Flat voltage output and boost output circuit of solar street lamp |
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| Publication Number | Publication Date |
|---|---|
| CN221043278U true CN221043278U (en) | 2024-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322789853.5U Active CN221043278U (en) | 2023-10-17 | 2023-10-17 | Flat voltage output and boost output circuit of solar street lamp |
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| CN (1) | CN221043278U (en) |
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- 2023-10-17 CN CN202322789853.5U patent/CN221043278U/en active Active
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