CN205491293U - A solar LED lighting control circuit - Google Patents

Abstract

The utility model discloses a solar LED lighting control circuit, including a solar panel T, a diode D1, a relay J, a chip IC1 and an LED lamp H, wherein the anode of the diode D1 is connected to the solar panel T, the cathode of the diode D1 is connected to the positive electrode of a battery E, a resistor R1 and a contact J‑1 of the relay J, the other end of the contact J‑1 of the relay J is connected to the pin 1 of the chip IC1, and the other end of the resistor R1 is connected to the cathode of the diode D2. The utility model solar LED lighting control circuit has a simple structure, few components, uses solar energy for power supply, and is provided with a voltage stabilizing module, an overcurrent protection module and an undervoltage protection module in the circuit, and the output voltage of the circuit is convenient to adjust, so it has the advantages of diverse functions, convenient use and strong practicality.

Description

A solar LED lighting control circuit

technical field

The utility model relates to a lighting circuit, in particular to a solar LED lighting control circuit.

Background technique

LED is recognized as the fourth-generation green light source. It is a solid cold light source with many advantages such as high efficiency, long life, safety and environmental protection, small size, high reliability, and fast response. At present, to achieve the same lighting effect, the power consumption of LED is about 1/10 of that of incandescent lamp and 1/2 of that of fluorescent lamp, so it is widely used in various lighting facilities, especially with the energy-saving, environmental protection and environmental protection advocated in recent years. Comparing with each other, the lighting facilities using solar energy and LED lights have the advantages of no pollution, low cost, and environmental protection, and are widely loved by people. However, the traditional photovoltaic lighting has a single function, a single output voltage, and poor stability, which seriously reduces the battery capacity. And the service life of LED lamps.

Utility model content

The purpose of this utility model is to provide a solar LED lighting control circuit with simple structure and stable performance, so as to solve the problems raised in the above-mentioned background technology.

In order to achieve the above object, the utility model provides the following technical solutions:

A solar LED lighting control circuit, including a solar panel T, a diode D1, a relay J, a chip IC1 and an LED lamp H, the anode of the diode D1 is connected to the solar panel T, the cathode of the diode D1 is connected to the positive pole of the storage battery E, the resistor R1 and Contact J-1 of relay J, the other end of contact J-1 of relay J is connected to pin 1 of chip IC1, the other end of resistor R1 is connected to the cathode of diode D2, the anode of diode D2 is connected to relay J, battery E The negative pole is connected to the other end of the relay J, the other end of the solar panel T, the resistor R3, the resistor R5, the resistor R7, the emitter of the triode V1, the emitter of the triode V2 and the anode of the three-terminal adjustable reference source P, three-terminal adjustable The cathode of reference source P is connected to capacitor C1, resistor R4 and pin 2 of chip IC1, the reference electrode of three-terminal adjustable reference source P is connected to resistor R2, the other end of capacitor C1 and a fixed end of potentiometer RP1, potentiometer RP1 The other fixed end of the potentiometer RP1 is connected to the sliding end of the potentiometer RP1 and the other end of the resistor R3, the other end of the resistor R2 is connected to the switch S1 and pin 3 of the chip IC1, and the other end of the switch S1 is connected to the resistor R6, the collector of the transistor V3 and The collector of the transistor V4, the other end of the resistor R4 is connected to the other end of the resistor R5 and the base of the transistor V1, the collector of the transistor V1 is connected to the other end of the resistor R6, the collector of the transistor V2 and the base of the transistor V3, and the transistor V3 The emitter of the triode V4 is connected to the base of the triode V4, the emitter of the triode V4 is connected to the LED lamp H, and the other end of the LED lamp H is connected to the base of the triode V2 and the other end of the resistor R7. The model of the chip IC1 is LM7812.

As a preferred solution of the present invention: the model of the three-terminal adjustable reference source P is TL431.

Compared with the prior art, the beneficial effects of the utility model are: the solar LED lighting control circuit of the utility model has a simple structure, fewer components, uses solar power for power supply, and is provided with a voltage stabilizing module, an overcurrent protection module and an undercurrent protection module in the circuit. voltage protection module, and the output voltage of the circuit is convenient to adjust, so it has the advantages of various functions, convenient use and strong practicability.

Description of drawings

Figure 1 is a circuit diagram of a solar LED lighting control circuit.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Fig. 1, in the embodiment of the utility model, a solar LED lighting control circuit includes a solar panel T, a diode D1, a relay J, a chip IC1 and an LED lamp H, the anode of the diode D1 is connected to the solar panel T, and the diode D1 The cathode of D1 is connected to the positive pole of battery E, resistor R1 and contact J-1 of relay J, the other end of contact J-1 of relay J is connected to pin 1 of chip IC1, and the other end of resistor R1 is connected to the cathode of diode D2 , the anode of diode D2 is connected to relay J, the negative pole of battery E is connected to the other end of relay J, the other end of solar panel T, resistor R3, resistor R5, resistor R7, emitter of triode V1, emitter of triode V2 and three terminals The anode of the adjustable reference source P, the cathode of the three-terminal adjustable reference source P are connected to capacitor C1, resistor R4 and pin 2 of the chip IC1, the reference pole of the three-terminal adjustable reference source P is connected to the resistor R2, and the other end of the capacitor C1 And one fixed end of the potentiometer RP1, the other fixed end of the potentiometer RP1 is connected to the sliding end of the potentiometer RP1 and the other end of the resistor R3, the other end of the resistor R2 is connected to the switch S1 and pin 3 of the chip IC1, the switch S1 The other end is connected to the resistor R6, the collector of the transistor V3 and the collector of the transistor V4, the other end of the resistor R4 is connected to the other end of the resistor R5 and the base of the transistor V1, and the collector of the transistor V1 is connected to the other end of the resistor R6, the transistor V2 The collector of the transistor V3 and the base of the transistor V3, the emitter of the transistor V3 is connected to the base of the transistor V4, the emitter of the transistor V4 is connected to the LED lamp H, and the other end of the LED lamp H is connected to the base of the transistor V2 and the other end of the resistor R7 , the model of the chip IC1 is LM7812.

The model of the three-terminal adjustable reference source P is TL431.

The working principle of the utility model is: the solar panel T completes the photoelectric conversion and transmits the electric energy to the battery E through the diode D1, the diode D2 and the relay J form an undervoltage protection circuit, and when the voltage of the battery E is normal, its voltage can break down the diode D2 makes the relay J conduct, its contact J-1 pulls in, the circuit is energized, and supplies power to the LED lamp H through the three-terminal voltage regulator IC1, switch S1 and triode V4, and R7 is a current sampling resistor for current feedback , combined with the triode V2 to achieve overcurrent protection, when the current is too large, the voltage applied to the base of the triode V2 increases, and the triode V2 is turned on, thereby pulling down the voltage at the base of the triode V3, the triode V3 and the triode V4 are cut off, and the LED The lamp H is turned off, the resistor R2, the resistor R3 and the potentiometer RP1 form a reference voltage circuit, which is used to determine the reference voltage of the three-terminal adjustable reference source P, thereby stabilizing the output voltage of the chip IC1, and adjusting the value of the potentiometer RP1 can be changed When the output voltage of the chip IC1 is too high, the voltage added to the base of the transistor V1 through the resistor R4 will turn on the transistor V1, and the transistor V3 and the transistor V4 will be cut off, so as to protect the lamp H. When the voltage of the battery E When it is insufficient, its voltage is not enough to break down the diode D2, so the relay J loses power, and its contact J-1 is disconnected, effectively protecting the LED lamp H from being damaged by undervoltage.

Claims (2)

1. null1. a solar LED illumination control circuit，Including solar panels T、Diode D1、Relay J、Chip IC 1 and LED H，It is characterized in that，The anode of described diode D1 connects solar panels T，The negative electrode of diode D1 connects the positive pole of accumulator E、The contact J-1 of resistance R1 and relay J，The other end of the contact J-1 of relay J connects the pin 1 of chip IC 1，The other end of resistance R1 connects the negative electrode of diode D2，The anode of diode D2 connects relay J，The negative pole of accumulator E connects the other end of relay J、The other end of solar panels T、Resistance R3、Resistance R5、Resistance R7、The emitter stage of audion V1、The emitter stage of audion V2 and the anode of three end adjustable reference source P，The negative electrode of three end adjustable reference source P connects electric capacity C1、The pin 2 of resistance R4 and chip IC 1，The reference pole of three end adjustable reference source P connects resistance R2、The other end of electric capacity C1 and one of potentiometer RP1 fixing end，Another fixing end of potentiometer RP1 connects sliding end and the other end of resistance R3 of potentiometer RP1，The other end connecting valve S1 of resistance R2 and the pin 3 of chip IC 1，The other end of switch S1 connects resistance R6、The colelctor electrode of audion V3 and the colelctor electrode of audion V4，The other end of resistance R4 connects the other end and the base stage of audion V1 of resistance R5，The colelctor electrode of audion V1 connects the other end of resistance R6、The colelctor electrode of audion V2 and the base stage of audion V3，The base stage of the emitter stage connecting triode V4 of audion V3，The emitter stage of audion V4 connects LED H，The base stage of the other end connecting triode V2 of LED H and the other end of resistance R7，The model of described chip IC 1 is LM7812.
2. Solar LED illumination control circuit the most according to claim 1, it is characterised in that the model of described three end adjustable reference source P is TL431.