CN206402503U - A bicycle light brightness adjustment circuit - Google Patents

Abstract

Circuit is adjusted the utility model discloses a kind of dynamo lighting set brightness, including vehicular light control module, charging module, lens, the vehicular light control module connects charging module, the dynamo lighting set brightness regulation circuit includes charging module, car light constant-current driven module, control module, low voltage detecting module, the charging module, car light constant-current driven module, low voltage detecting module all link control modules, the car light constant-current driven module, low voltage detecting module all connects charging module, the utility model adjusts dynamo lighting set brightness by electronic switch, the advantage of electronic switch is that the electric current passed through is small, using permanent, it is easy to control, therefore the utility model long lifespan, control brightness convenient, constant current driving IC causes car light D2 illumination to keep constant.

Description

A bicycle light brightness adjustment circuit

technical field

The utility model relates to a bicycle light brightness adjustment circuit.

Background technique

Existing bicycle lights are controlled to turn on or off by mechanical switches, and there is only one gear, so the brightness of the bicycle lights cannot be adjusted. Moreover, the product uses a mechanical switch. The disadvantage of the mechanical switch is that the current passing through it is large, it is easy to damage the switch, and the life is shortened, so the life is short.

Utility model content

The purpose of the utility model is to overcome the deficiencies in the existing products and provide a bicycle light brightness adjustment circuit.

In order to achieve the above object, the utility model is achieved through the following technical solutions:

A bicycle light brightness adjustment circuit, comprising a charging module, a vehicle lamp constant current drive module, a control module, and a low voltage detection module, the charging module, the vehicle lamp constant current drive module, and the low voltage detection module are all connected to the control module, the Both the lamp constant current drive module and the low voltage detection module are connected to the charging module. The control module includes a control chip U3 and an electronic switch S1. The lamp constant current drive module includes a constant current drive chip IC, a lamp D2, a resistor R5, the 6 pins of the control chip U3 are connected to the ground signal GND through the electronic switch S1, the 7 pins of the control chip U3 are connected to the 3 pins of the constant current drive chip IC, and the 2 pins of the constant current drive chip IC The pins are connected to the charging module through the lamp D2, the 1 pin of the constant current driving chip IC is connected to the ground signal GND through the resistor R5, and the 4 pins of the constant current driving chip IC are connected to the ground signal GND.

The low voltage detection module includes an indicator light D3 and a resistor R4. One end of the resistor R4 is connected to the charging module, and the other end of the resistor R4 is connected to pin 1 of the control chip U3 through the indicator light D3.

The control module also includes a capacitor C2 and a resistor R6. Pin 1 of the control chip U3 is connected to pin 8 of the control chip U3 through the capacitor C2, and pin 4 of the control chip U3 is connected to the ground signal GND through the resistor R6. Pin 4 of the control chip U3 is connected to the charging module.

The charging module includes a battery BT1, an indicator light D1, a charging management chip U1, a USB charging port J1, a resistor R1, and a resistor R2. The battery BT1 is connected to pin 3 of the charging management chip U1, and the USB charging port J1 is connected to the charging management chip. The 4 pins of U1, the USB charging port J1 is also connected to one end of the resistor R1 through the indicator light D1, the other end of the resistor R1 is connected to the 1 pin of the charging management chip U1, and the 3 pins of the charging management chip U1 The battery BT1 is connected to the ground signal GND, the 5th pin of the charging management chip U1 is connected to the ground signal GN through the resistor R3, and the battery BT1 is connected to the 4th pin of the control chip U3 through the resistor R2.

The utility model also includes a capacitor C1, and the 4 pins of the charging management chip U1 are connected to the ground signal GND through the capacitor C1.

The model of the charging management chip U1 is SL4054.

The IC model of the constant current driver chip is TAC7136.

The beneficial effects of the utility model are as follows: the utility model adjusts the brightness of the bicycle light through an electronic switch. The flow driver IC keeps the illuminance of the lamp D2 constant.

Description of drawings

Fig. 1 is the circuit schematic diagram of charging module;

Fig. 2 is a schematic circuit diagram of the lamp constant current drive module, the control module and the low voltage detection module.

detailed description

The technical scheme of the utility model is further described below in conjunction with the accompanying drawings of the description:

As shown in Figure 1 and Figure 2, a bicycle light brightness adjustment circuit includes a charging module, a constant current drive module for lights, a control module, and a low-voltage detection module. The detection modules are all connected to the control module, the lamp constant current drive module and the low voltage detection module are connected to the charging module, the control module includes a control chip U3, an electronic switch S1, and the lamp constant current drive module includes a constant current The driving chip IC, the lamp D2, and the resistor R5, the 6 pins of the control chip U3 are connected to the ground signal GND through the electronic switch S1, the 7 pins of the control chip U3 are connected to the 3 pins of the constant current driving chip IC, The 2 pins of the constant current driving chip IC are connected to the charging module through the lamp D2, the 1 pin of the constant current driving chip IC is connected to the ground signal GND through the resistor R5, and the 4 pins of the constant current driving chip IC are connected to Ground signal GND.

As shown in Figures 1 and 2, the low voltage detection module includes an indicator light D3 and a resistor R4, one end of the resistor R4 is connected to the charging module, and the other end of the resistor R4 is connected to 1 of the control chip U3 through the indicator light D3. pins.

As shown in Figure 1 and Figure 2, the control module also includes a capacitor C2 and a resistor R6, the 1 pin of the control chip U3 is connected to the 8 pins of the control chip U3 through the capacitor C2, and the 4 pins of the control chip U3 The pin is connected to the ground signal GND through the resistor R6, and the 4 pins of the control chip U3 are connected to the charging module.

As shown in Figure 1 and Figure 2, the charging module includes a battery BT1, an indicator light D1, a charging management chip U1, a USB charging port J1, a resistor R1, and a resistor R2, and the battery BT1 is connected to pin 3 of the charging management chip U1 The USB charging port J1 is connected to the 4 pins of the charging management chip U1, and the USB charging port J1 is also connected to one end of the resistor R1 through the indicator light D1, and the other end of the resistor R1 is connected to the 1 pin of the charging management chip U1, so Pin 3 of the charging management chip U1 is connected to the ground signal GND through the battery BT1, pin 5 of the charging management chip U1 is connected to the ground signal GN through a resistor R3, and the battery BT1 is connected to pin 4 of the control chip U3 through a resistor R2 .

As shown in Fig. 1 and Fig. 2, the utility model also includes a capacitor C1, and the 4 pins of the charging management chip U1 are connected to the ground signal GND through the capacitor C1.

As shown in Fig. 1 and Fig. 2, the model of the charging management chip U1 is SL4054.

The IC model of the constant current driver chip is TAC7136.

As shown in Figure 1 and Figure 2, in the charging module, the USB charging port J1 charges the battery BT1, the indicator light D1 works during charging, and the battery supplies power to the circuit. When the low voltage detection module detects that the voltage is too low, the indicator light D3 will work. The control chip U3 is controlled by the frequency of the electronic switch. The constant current driver IC can keep the illuminance of the lighting lamp D2 constant. The main control MCU controls the constant current drive IC to control the luminance of the lamp D2, and the illuminance remains constant. The constant current driver IC keeps the illuminance of the lamp D2 constant.

The utility model uses an electronic switch to adjust the brightness of the bicycle light. The advantages of the electronic switch are that the passing current is small, the use is long, and the control is convenient. Therefore, the utility model has a long life and is convenient to control the brightness. The illuminance remains constant.

It should be noted that what is listed above is only a specific embodiment of the present invention. Apparently, the utility model is not limited to the above embodiments, and many variations are possible. In a word, all deformations that can be derived or associated directly from the disclosure of the utility model by those skilled in the art should be regarded as the utility model.

Claims (7)

1. A bicycle light brightness adjustment circuit, characterized in that it includes a charging module, a vehicle lamp constant current drive module, a control module, and a low voltage detection module, and the charging module, the vehicle lamp constant current drive module, and the low voltage detection module are all Connect the control module, the lamp constant current drive module and the low voltage detection module are connected to the charging module, the control module includes the control chip U3, the electronic switch S1, and the lamp constant current drive module includes the constant current drive chip IC , lamp D2, resistor R5, the 6 pins of the control chip U3 are connected to the ground signal GND through the electronic switch S1, the 7 pins of the control chip U3 are connected to the 3 pins of the constant current drive chip IC, the constant The 2 pins of the current driving chip IC are connected to the charging module through the lamp D2, the 1 pin of the constant current driving chip IC is connected to the ground signal GND through the resistor R5, and the 4 pins of the constant current driving chip IC are connected to the ground signal GND . 2. A bicycle light brightness adjustment circuit according to claim 1, wherein the low voltage detection module includes an indicator light D3 and a resistor R4, one end of the resistor R4 is connected to the charging module, and the other end of the resistor R4 One end is connected to pin 1 of the control chip U3 through the indicator light D3. 3. A bicycle light brightness adjustment circuit according to claim 1, wherein the control module further includes a capacitor C2 and a resistor R6, and the pin 1 of the control chip U3 is connected to the pin 8 of the control chip U3 through the capacitor C2. Pin 4 of the control chip U3 is connected to the ground signal GND through a resistor R6, and pin 4 of the control chip U3 is connected to the charging module. 4. A bicycle light brightness adjustment circuit according to claim 1, wherein the charging module includes a battery BT1, an indicator light D1, a charging management chip U1, a USB charging port J1, a resistor R1, and a resistor R2. The battery BT1 is connected to pin 3 of the charging management chip U1, and the USB charging port J1 is connected to pin 4 of the charging management chip U1. The USB charging port J1 is also connected to one end of the resistor R1 through the indicator light D1, and the other end of the resistor R1 Connect pin 1 of the charging management chip U1, pin 3 of the charging management chip U1 is connected to the ground signal GND through the battery BT1, pin 5 of the charging management chip U1 is connected to the ground signal GN through a resistor R3, and the battery BT1 Connect the pin 4 of the control chip U3 through the resistor R2. 5 . The bicycle light brightness adjustment circuit according to claim 4 , further comprising a capacitor C1 , and the 4 pins of the charging management chip U1 are connected to the ground signal GND through the capacitor C1 . 6 . The bicycle light brightness adjustment circuit according to claim 3 , wherein the model of the charging management chip U1 is SL4054. 7. A bicycle light brightness adjustment circuit according to claim 1, characterized in that the IC model of the constant current driver chip is TAC7136.