LED bracelet control circuit with watch function

Abstract

The utility model discloses a kind of LED bracelet control circuit with watch function, including main control chip U1, charging management chip U2, field effect transistor Q1, LED lamp strip interface J4, battery input interface J1, and the crystal oscillator Y1 connected with the main control chip U1, a plurality of light emitting diode connected with the main control chip U1, a plurality of the light emitting diode is arranged into the shape of four "8" characters, the D end of the field effect transistor Q1 is connected with the LED lamp strip interface J4 through resistance R15, the G end of the field effect transistor Q1 is connected the fourteenth pin of the main control chip U1 through resistance R7, the G end of the field effect transistor Q1 is connected the S end of the field effect transistor Q1 through resistance R9. The utility model is simple in structure, with time display function, timely display time, convenient to use, improve consumer experience, charging and power supply stability, LED bracelet light control stability, control accurate, and consumer experience is good.

Description

Technical Field

[0001] This utility model relates to the field of control circuit technology, specifically to a control circuit for an LED wristband with watch functionality. Background Technology

[0002] An LED wristband is a type of wristband that emits light, serving as both a decorative and lighting accessory. It's convenient to carry and suitable for various occasions. As people's living standards improve, their demands for LED wristbands have also increased, leading to the emergence of LED color-changing wristbands, which enhance the atmosphere of various activities and enrich people's lives. However, existing LED wristbands lack time display functions, have complex control circuit structures, and suffer from unstable charging and power supply, resulting in unstable light emission control and a poor consumer experience. Therefore, to avoid the shortcomings of existing technology, it is necessary to improve it. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings and deficiencies in the existing technology and provide a stable control circuit for an LED wristband with watch function.

[0004] This utility model is achieved through the following technical solution:

[0005] A control circuit for an LED wristband with watch functionality includes a main control chip U1, a charging management chip U2, a field-effect transistor Q1, an LED strip interface J4, a battery input interface J1, a crystal oscillator Y1 connected to the main control chip U1, and several light-emitting diodes (LEDs) connected to the main control chip U1. The LEDs are arranged in a figure-eight shape. The drain (D) terminal of the field-effect transistor Q1 is connected to the LED strip interface J4 via a resistor R15, and the gate (G) terminal of the field-effect transistor Q1 is connected to... The fourteenth pin of the main control chip U1 is connected to the fourteenth pin, the gate terminal of the field-effect transistor Q1 is connected to the source terminal of the field-effect transistor Q1 through resistor R9, the first pin of the crystal oscillator Y1 is connected to the seventeenth pin of the main control chip U1, the second pin of the crystal oscillator Y1 is connected to the eighteenth pin of the main control chip U1, the first pin of the crystal oscillator Y1 is connected to the fifteenth pin of the main control chip U1 through capacitor C2, and the second pin of the crystal oscillator Y1 is connected to the fifteenth pin of the main control chip U1 through capacitor C3.

[0006] Furthermore, the third pin of the charging management chip U2 is connected to the battery input interface J1, the fourth pin of the charging management chip U2 is connected to the interface CN1, the fifth pin of the charging management chip U2 is connected to the interface CN1 through resistor R14, and the third pin of the charging management chip U2 is connected to the interface CN1 through capacitor C6. The interface CN1 is a TYPE-C interface.

[0007] Furthermore, it also includes a display diode D33, the negative terminal of which is connected to the first pin of the charging management chip U2, and the positive terminal of which is connected to the fourth pin of the charging management chip U2 through a resistor R13.

[0008] Furthermore, the fourth pin of the charging management chip U2 is grounded through capacitor C5, and the second pin of the charging management chip U2 is grounded.

[0009] Furthermore, the battery input interface J1 is connected to the thirteenth pin of the main control chip U1 through resistor R11, the thirteenth pin of the main control chip U1 is grounded through capacitor C4, and the thirteenth pin of the main control chip U1 is grounded through resistor R12.

[0010] Furthermore, it also includes a programming interface J3, the first pin of which is connected to the battery input interface J1, the second pin of which is connected to the second pin of the main control chip U1, the third pin of which is connected to the third pin of the main control chip U1, and the fourth pin of which is grounded.

[0011] Furthermore, the nineteenth pin of the main control chip U1 is grounded via button SW1.

[0012] Furthermore, the S terminal of the field-effect transistor Q1 is grounded.

[0013] Furthermore, the charging management chip U2 is model number WH8059.

[0014] Furthermore, the main control chip U1 is model STM8S003F3P6.

[0015] Compared to existing technologies, this invention uses a crystal oscillator Y1 and several light-emitting diodes (LEDs) connected to a main control chip U1. These LEDs are arranged in four figure-eight shapes to display the time in real time, thus giving the LED bracelet a time display function and improving the consumer experience. By using a field-effect transistor Q1 and the main control chip U1 to control the output voltage and current, and by using a charging management chip U2 for charging management, the LED bracelet control circuit has a simple structure, stable charging and power supply, stable and precise LED light control, and a better consumer experience. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a circuit diagram of the control circuit for the LED wristband with watch function of this utility model;

[0018] Figure 2 This is a schematic diagram of the circuit board for the LED wristband control circuit with watch function of this utility model. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] like Figure 1 and Figure 2The present invention discloses an LED wristband control circuit with watch function, comprising a main control chip U1, a charging management chip U2, a field-effect transistor Q1, an LED strip interface J4, a battery input interface J1, a crystal oscillator Y1 connected to the main control chip U1, and several light-emitting diodes connected to the main control chip U1, the light-emitting diodes being arranged in a figure-eight shape. The drain terminal of the field-effect transistor Q1 is connected to the LED strip interface J4 through a resistor R15, the gate terminal of the field-effect transistor Q1 is connected to the fourteenth pin of the main control chip U1 through a resistor R7, the gate terminal of the field-effect transistor Q1 is connected to the source terminal of the field-effect transistor Q1 through a resistor R9, the first pin of the crystal oscillator Y1 is connected to the seventeenth pin of the main control chip U1, the second pin of the crystal oscillator Y1 is connected to the eighteenth pin of the main control chip U1, the first pin of the crystal oscillator Y1 is connected to the fifteenth pin of the main control chip U1 through a capacitor C2, and the second pin of the crystal oscillator Y1 is connected to the fifteenth pin of the main control chip U1 through a capacitor C3. By setting up a crystal oscillator Y1 and several light-emitting diodes connected to the main control chip U1, the light-emitting diodes are arranged in four figure-eight shapes to display the time in a timely manner, giving the LED bracelet a time display function and improving the consumer experience. By setting up a field-effect transistor Q1 and the main control chip U1 to control the output voltage and current, and setting up a charging management chip U2 for charging management, the LED bracelet control circuit has a simple structure, stable charging and power supply, stable and precise LED bracelet light control, and a good consumer experience.

[0021] The third pin of the charging management chip U2 is connected to the battery input interface J1, the fourth pin of the charging management chip U2 is connected to the interface CN1, the fifth pin of the charging management chip U2 is connected to the interface CN1 through the resistor R14, and the third pin of the charging management chip U2 is connected to the interface CN1 through the capacitor C6. The interface CN1 is a TYPE-C interface, which facilitates the charging of the LED bracelet and improves the charging stability of the LED bracelet.

[0022] It also includes a display diode D33. The negative terminal of the display diode D33 is connected to the first pin of the charging management chip U2, and the positive terminal of the display diode D33 is connected to the fourth pin of the charging management chip U2 through a resistor R13. The display diode D33 displays the charging status.

[0023] The fourth pin of the charging management chip U2 is grounded through capacitor C5, and the second pin of the charging management chip U2 is also grounded, which improves the stability and safety of the charging management chip U2.

[0024] The battery input interface J1 is connected to the thirteenth pin of the main control chip U1 through resistor R11. The thirteenth pin of the main control chip U1 is grounded through capacitor C4 and resistor R12, which improves the stability and safety of the battery power supply to the main control chip U1.

[0025] It also includes a programming interface J3. The first pin of the programming interface J3 is connected to the battery input interface J1, the second pin of the programming interface J3 is connected to the second pin of the main control chip U1, the third pin of the programming interface J3 is connected to the third pin of the main control chip U1, and the fourth pin of the programming interface J3 is grounded to facilitate program input to the main control chip U1 for controlling the light-emitting diode.

[0026] The nineteenth pin of the main control chip U1 is grounded through button SW1, which turns on the LED wristband.

[0027] Grounding the source (S) terminal of MOSFET Q1 improves the safety of MOSFET Q1 operation.

[0028] As one specific implementation method, the charging management chip U2 is model number WH8059.

[0029] As one specific implementation method, the main control chip U1 is model STM8S003F3P6.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A control circuit for an LED wristband with watch functionality, characterized in that: The system includes a main control chip U1, a charging management chip U2, a field-effect transistor Q1, an LED strip interface J4, a battery input interface J1, a crystal oscillator Y1 connected to the main control chip U1, and several light-emitting diodes (LEDs) connected to the main control chip U1. The LEDs are arranged in a figure-eight shape. The drain (D) terminal of the field-effect transistor Q1 is connected to the LED strip interface J4 via a resistor R15. The gate (G) terminal of the field-effect transistor Q1 is connected to the fourteenth pin of the main control chip U1 via a resistor R7. The gate (G) terminal of the field-effect transistor Q1 is connected to the source (S) terminal of the field-effect transistor Q1 via a resistor R9. The first pin of the crystal oscillator Y1 is connected to the seventeenth pin of the main control chip U1, the second pin of the crystal oscillator Y1 is connected to the eighteenth pin of the main control chip U1, the first pin of the crystal oscillator Y1 is connected to the fifteenth pin of the main control chip U1 via a capacitor C2, and the second pin of the crystal oscillator Y1 is connected to the fifteenth pin of the main control chip U1 via a capacitor C3.

2. The LED bracelet control circuit with watch function according to claim 1, characterized in that: The third pin of the charging management chip U2 is connected to the battery input interface J1, the fourth pin of the charging management chip U2 is connected to the interface CN1, the fifth pin of the charging management chip U2 is connected to the interface CN1 through resistor R14, and the third pin of the charging management chip U2 is connected to the interface CN1 through capacitor C6. The interface CN1 is a TYPE-C interface.

3. The LED bracelet control circuit with watch function according to claim 2, characterized in that: It also includes a display diode D33, the negative terminal of which is connected to the first pin of the charging management chip U2, and the positive terminal of which is connected to the fourth pin of the charging management chip U2 through a resistor R13.

4. The LED bracelet control circuit with watch function according to claim 2, characterized in that: The fourth pin of the charging management chip U2 is grounded through capacitor C5, and the second pin of the charging management chip U2 is also grounded.

5. The LED bracelet control circuit with watch function according to claim 1, characterized in that: The battery input interface J1 is connected to the thirteenth pin of the main control chip U1 through resistor R11. The thirteenth pin of the main control chip U1 is grounded through capacitor C4 and resistor R12.

6. The LED bracelet control circuit with watch function according to claim 1, characterized in that: It also includes a programming interface J3, the first pin of which is connected to the battery input interface J1, the second pin of which is connected to the second pin of the main control chip U1, the third pin of which is connected to the third pin of the main control chip U1, and the fourth pin of which is grounded.

7. The LED bracelet control circuit with watch function according to claim 1, characterized in that: The nineteenth pin of the main control chip U1 is grounded through button SW1.

8. The LED bracelet control circuit with watch function according to claim 1, characterized in that: The S terminal of the field-effect transistor Q1 is grounded.

9. The LED bracelet control circuit with watch function according to claim 1, characterized in that: The charging management chip U2 is model number WH8059.

10. The LED bracelet control circuit with watch function according to claim 1, characterized in that: The main control chip U1 is model STM8S003F3P6.

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