Solar small night lamp control circuit

Abstract

The utility model discloses a solar small night lamp control circuit, which relates to the technical field of illuminating lamps and comprises a main control chip U3, an output seat P1 and a voltage stabilizing chip U1, a ninth pin of the main control chip U3 is connected with a first pin of the output seat P1, a fourth pin of the output seat P1 is connected with a third pin of the voltage stabilizing chip U1, and a ninth pin of the main control chip U3 is connected with a ninth pin of the output seat P1. A second pin of the output seat P1 is connected with a thirteenth pin of the main control chip U3, the main control chip U3 is electrically connected with a rheostat assembly, the main control chip U3 is further electrically connected with an infrared inductor assembly, and a pin of the voltage stabilizing chip U1 is electrically connected with a voltage stabilizing capacitor assembly. According to the utility model, the voltage stabilization chip U1 and the voltage stabilization capacitor assembly are arranged to carry out voltage stabilization control on the voltage of the storage battery of the solar lamp, the photosensitive diode feeds back the illumination intensity of the field to the main control chip U3, and the main control chip U3 adjusts the levels of the rheostats R3, R4 and R5, thereby controlling the stable output of the current and voltage of the storage battery of the solar small night lamp. And the brightness stability is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of lighting lamps, in particular to a solar night light control circuit. Background Art

[0002] Some solar night lights on the market use high-efficiency solar panels as their power supply. The solar panels convert sunlight energy into electrical energy, which can charge the built-in battery of the night light when there is light during the day, and the light is turned on by an intelligent control system.

[0003] The continuous power supply of the battery is the guarantee for the normal operation of the solar night light. Due to the competitiveness of the market, the selling price of the night light is generally low in order to increase sales, so the quality of the battery built into the night light has to be reduced. In addition, since the control circuit of the night light is relatively simple, the output voltage of the battery fluctuates greatly. The voltage stability of such a battery will become poor during use, resulting in the night light's light intensity being unstable, which can easily cause problems such as myopia in users. Utility Model Content

[0004] The purpose of the present utility model is to provide a solar night light control circuit to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A solar night light control circuit includes a main control chip U3, an output socket P1 and a voltage stabilizing chip U1. The ninth pin of the main control chip U3 is connected to the first pin of the output socket P1, and the fourth pin of the output socket P1 is connected to the third pin of the voltage stabilizing chip U1; the second pin of the output socket P1 is connected to the thirteenth pin of the main control chip U3, and a resistor R1 is connected in series therebetween; the main control chip U3 is electrically connected to a variable resistor component, and the main control chip U3 is also electrically connected to an infrared inductor component; the pins of the voltage stabilizing chip U1 are electrically connected to a voltage stabilizing capacitor component.

[0007] The main control chip U3 controls the brightness and time of the LED. The model of the main control chip U3 is DY3152M. The voltage regulator chip U1 and the voltage regulator capacitor device cooperate with each other to realize the battery power supply voltage control of the solar circuit light. The model of the voltage regulator chip U1 is TLV76033DBZR.

[0008] The variable resistor assembly includes a phototransistor, a variable resistor R3, a variable resistor R4 and a variable resistor R5. The phototransistor and the variable resistor R3 are connected in series to form a light feedback group. The light feedback group is connected in parallel with the variable resistor R4 and the variable resistor R5 respectively.

[0009] The phototransistor provides feedback on the on-site light intensity, feeds back the light intensity to the main chip, and adjusts the level through the rheostats R3, R4, and R5, thereby controlling the output current and voltage of the solar night light battery to ensure the stability of the light. The phototransistor model is GM314, and the maximum resistance of the rheostats R3, R4, and R5 is 1MΩ.

[0010] Preferably, the resistor R1 is located on one side of the main control chip U3 and is connected in parallel with a resistor R2. One end of the resistor R2 is grounded, and the third pin of the output socket P1 is grounded. The resistance of the resistor R1 is 33KΩ, and the resistance of the resistor R2 is 200KΩ.

[0011] Preferably, the voltage-stabilizing capacitor assembly includes capacitor C1, capacitor C2, capacitor C3 and capacitor C4; capacitor C1 and capacitor C2 are connected in series between the first and third pins of the voltage-stabilizing chip U1, and the capacitors C1 and C2 are connected in parallel to each other; capacitor C3 and capacitor C4 are connected in series between the first and second pins of the voltage-stabilizing chip U1, and the capacitors C3 and C4 are connected in parallel.

[0012] Preferably, the two ends of the variable resistor device are connected to the positive pole of the power supply and the ground respectively, the sliding end of the variable resistor R3 is connected to the second pin of the main control chip U3, the sliding end of the variable resistor R4 is connected to the third pin of the main control chip U3, and the sliding end of the variable resistor R5 is connected to the fourth pin of the main control chip U3.

[0013] Preferably, the infrared inductor assembly includes a sensor P2 and a sensor P3, and each of the sensors P2 and P3 includes three pins, a first pin is connected to the positive electrode, and a third pin is grounded.

[0014] Preferably, the second pin of the sensor P2 is connected to the sixteenth pin of the main control chip U3, and the second pin of the sensor P3 is connected to the fifteenth pin of the main control chip U3.

[0015] The two sensors P2 and P3 are KEY328 digital serial port pyroelectric infrared sensors. By using two KEY328 sensors, the sensing angle is increased to sense the surrounding environment fluctuations and control the light switch.

[0016] Due to the adoption of the above technical solution, the present invention has achieved the following technical advancements compared to the prior art:

[0017] 1. The utility model provides a solar night light control circuit, which is equipped with a voltage stabilizing chip U1 and a voltage stabilizing capacitor component to perform voltage stabilization control on the voltage of the solar lamp battery. The photodiode feeds back the light intensity on site to the main control chip U3. The main control chip U3 adjusts the levels of the rheostats R3, R4, and R5, thereby controlling the stable output of the current and voltage of the solar night light battery to ensure the stability of the light.

[0018] 2. The utility model provides a solar night light control circuit. By adopting sensors P2 and P3 to increase the sensing field angle, it can sense changes in the surrounding environment to control the switch of the night light, increasing intelligence and convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the circuit principle of the utility model. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below with reference to the embodiments:

[0021] like Figure 1 As shown, the present invention provides a solar night light control circuit, comprising a main control chip U3, an output connector P1, and a voltage regulator chip U1. The main control chip U3 is model DY3152M and has a total of 16 pins, while the output connector P1 has a total of 4 pins. Pin 9 of the main control chip U3 is connected to pin 1 of the output connector P1, which is also connected to the power supply terminal of the LED to power the night light. Pin 2 of the output connector P1 is connected in series with resistor R1 and then to pin 13 of the main control chip U3, with a button positioned between them. Resistor R2 is also connected in parallel between resistor R1 and the main control chip U3, with one end of resistor R2 grounded. Pin 3 of the output connector P1 is connected to the negative terminal of the 3-12V power supply and the negative terminal of the LED. Resistor R1 has a resistance of 33kΩ, and R2 has a resistance of 200kΩ. The main control chip U3 is model DY3152M. The main control chip U3 is used to control the brightness and timing of the LED.

[0022] The fourth pin of output connector P1 is connected to the third pin of voltage regulator chip U1. Voltage regulator chip U1 has three pins: the first pin is grounded, and the second pin is connected to the positive power supply. Capacitors C1 and C2 are connected in series between the third and second pins of voltage regulator chip U1, and capacitors C1 and C2 are connected in parallel. Capacitors C3 and C4 are connected in series between the first and second pins of voltage regulator chip U1, and capacitors C3 and C4 are connected in parallel. The interaction between voltage regulator chip U1 and the capacitors provides a stable voltage for the night light, making the circuit frequency more stable. Voltage regulator chip U1 is a TLV76033DBZR.

[0023] The second pin of the main control chip U3 is connected to the sliding terminal of rheostat R3, the third pin is connected to the sliding terminal of rheostat R4, and the fourth pin is connected to the sliding terminal of rheostat R5. Rheostat R3 is connected in series with a phototransistor to form a light feedback group. The light feedback group is connected in parallel with rheostats R4 and R5, and its two ends are connected to the positive terminal of the power supply and ground. The phototransistor is used to reflect the local light intensity and feedback it to the main control chip U3. The main control chip U3 adjusts the voltage levels of rheostats R3, R4, and R5, thereby controlling the current and voltage output of the solar night light battery. The photosensor model is GM3C4, and the above-mentioned rheostats are all sliding rheostats.

[0024] The fifteenth and sixteenth pins of the main control chip U3 are connected to the second pins of sensors P3 and P2 respectively. Sensors P2 and P3 are KEY328 digital serial port pyroelectric infrared sensors, which have three pins in total. The first pin is connected to the positive pole of the power supply and the third pin is grounded. By setting up two KEY328 sensors, the sensing field viewing angle can be increased, thereby accurately feeding back to the main control chip U3 to ensure the output of current and voltage, and to ensure more uniform luminous brightness.

[0025] It should be noted that, in the description of this disclosure, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this disclosure based on specific circumstances.

[0026] The above generally describes the present invention in detail. However, it is obvious to those skilled in the art that modifications or improvements may be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A solar night light control circuit, characterized by: It includes a main control chip U3, an output socket P1 and a voltage stabilizing chip U1. The ninth pin of the main control chip U3 is connected to the first pin of the output socket P1, and the fourth pin of the output socket P1 is connected to the third pin of the voltage stabilizing chip U1; the second pin of the output socket P1 is connected to the thirteenth pin of the main control chip U3, and a resistor R1 is connected in series between them; the main control chip U3 is electrically connected to a variable resistor component, and the main control chip U3 is also electrically connected to an infrared inductor component; the pins of the voltage stabilizing chip U1 are electrically connected to a voltage stabilizing capacitor component; The variable resistor assembly includes a phototransistor, a variable resistor R3, a variable resistor R4 and a variable resistor R5. The phototransistor and the variable resistor R3 are connected in series to form a light feedback group. The light feedback group is connected in parallel with the variable resistor R4 and the variable resistor R5 respectively.

2. The solar night light control circuit according to claim 1, characterized in that: The resistor R1 is located on one side of the main control chip U3 and is connected in parallel with a resistor R2. One end of the resistor R2 is grounded, and the third pin of the output socket P1 is grounded.

3. The solar night light control circuit according to claim 1, characterized in that: The voltage stabilizing capacitor assembly includes capacitor C1, capacitor C2, capacitor C3 and capacitor C4. Capacitor C1 and capacitor C2 are connected in series between the first and third pins of the voltage stabilizing chip U1, and the capacitors C1 and C2 are connected in parallel with each other; capacitor C3 and capacitor C4 are connected in series between the first and second pins of the voltage stabilizing chip U1, and the capacitors C3 and C4 are connected in parallel.

4. The solar night light control circuit according to claim 1, characterized in that: The two ends of the variable resistor device are connected to the positive pole of the power supply and the ground respectively, the sliding end of the variable resistor R3 is connected to the second pin of the main control chip U3, the sliding end of the variable resistor R4 is connected to the third pin of the main control chip U3, and the sliding end of the variable resistor R5 is connected to the fourth pin of the main control chip U3.

5. The solar night light control circuit according to claim 1, characterized in that: The infrared inductor assembly includes a sensor P2 and a sensor P3. The sensors P2 and P3 each include three pins, a first pin connected to the positive electrode, and a third pin connected to the ground.

6. The solar night light control circuit according to claim 5, characterized in that: The second pin of the sensor P2 is connected to the sixteenth pin of the main control chip U3 , and the second pin of the sensor P3 is connected to the fifteenth pin of the main control chip U3 .

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