A light control circuit having a hall sensing device

Abstract

The utility model discloses a light control circuit with hall induction device, including power J1, hall induction module and LED drive module, power J1's first end and second end are connected with control chip U2 through voltage stabilizing circuit, and voltage stabilizing circuit includes LED lamp D1, hall induction module includes resistance R9, hall effect sensor Q2, electric capacity C7, electric capacity C8 and resistance R8, hall effect sensor Q2's first pole is connected with resistance R9, and the both ends of electric capacity C8 are connected with hall effect sensor Q2's first pole and hall effect sensor's second pole respectively, hall effect sensor Q2's third pole is connected with resistance R8, and the third pole is connected with resistance R8 and has electric capacity C7, and one end of resistance R9 is connected with control chip U1's first branch foot, and the LED drive module includes resistance R2, resistance R3, NPN triode Q1, resistance R2 one end is connected with control chip U1's fifth branch foot.

Description

Technical Field

[0001] This utility model relates to the field of lighting control systems for household cabinet doors, and in particular to a lighting control circuit with a Hall effect sensor. Background Technology

[0002] With the development of home convenience, the ease of use between cabinets and cabinet doors is also a key design consideration. Existing lighting controls generally use structures such as flexible switches. For example, when the cabinet door is closed, the pivot end of the cabinet door can compress or release the flexible switch. When the cabinet door switches to another state, the flexible switch is triggered, thereby turning on the lights.

[0003] Among them, the most commonly used is the refrigerator-like lighting structure, such as Chinese Patent 201621458971.1, which adopts a switch part to control the opening and closing of the lighting fixture. The switch part is also electrically connected to a buffer circuit to suppress the voltage change caused by the opening and closing of the switch part and a conversion circuit to convert the voltage change into a current change to drive the current limiting switch circuit to conduct to supply power to the lighting fixture.

[0004] Its main design feature is the slow switching of lights.

[0005] However, for existing household use, the design of this type of flexible switch is relatively large, which affects the aesthetics of the cabinet door. Utility Model Content

[0006] The main purpose of this invention is to propose a lighting control circuit with a Hall effect sensor, which aims to improve the existing lighting control circuit. The Hall effect sensor is used to turn the lights on or off, and the circuit is small in size and convenient to use.

[0007] To achieve the above objectives, this utility model proposes a lighting control circuit with a Hall effect sensor, comprising:

[0008] Power supply J1, the first and second terminals of which are connected to control chip U2 through a voltage regulator circuit, the voltage regulator circuit including LED lamp D1;

[0009] Control chip U1, the first pin of which is connected to the first pin of control chip U2.

[0010] A Hall effect sensing module, comprising a resistor R9, a Hall effect sensor Q2, a capacitor C7, a capacitor C8, and a resistor R8;

[0011] The first electrode of the Hall effect sensor Q2 is connected to the resistor R9;

[0012] The two ends of the capacitor C8 are connected to the first terminal of the Hall effect sensor Q2 and the second terminal of the Hall effect sensor, respectively.

[0013] The third electrode of the Hall effect sensor Q2 is connected to the resistor R8, and a capacitor C7 is connected between the third electrode and the resistor R8.

[0014] One end of the resistor R9 is connected to the first pin of the control chip U1.

[0015] Resistor R8 is connected to pin 7 of control chip U1;

[0016] The LED driver module includes resistors R2 and R3, and an NPN transistor Q1.

[0017] One end of the resistor R2 is connected to the fifth pin of the control chip U1, and the other end is connected to the NPN transistor Q1. The resistor R3 is connected in parallel between the resistor R2 and the NPN transistor Q1.

[0018] The NPN transistor Q1 is connected to relays J2 and J3;

[0019] The other end of the relay J2 is connected to the second pin of the power supply J1;

[0020] The other end of the relay J3 is connected to the first pin of the control chip U2.

[0021] In practical design, it has the following advantages:

[0022] 1. Modular design of the circuit: power input → 5V regulation → power supply to each module, making the circuit design simpler and more stable;

[0023] 2. Hall effect sensor Q2 detects the magnetic field → the signal is filtered and transmitted to the microcontroller (U1), which then turns on the LED D1. That is, the control chip U1 processes the input signal → and controls the LED response, brightness, and on-time of the LED D1 through the Q1 driving circuit.

[0024] 3. Program updates / debugging are completed through the J4 interface of the control chip U1; that is, the magnetic field size of the Hall effect sensor Q2 can be set according to actual needs to obtain the opening threshold. Attached Figure Description

[0025] Figure 1 This is the circuit diagram for this application. Detailed Implementation

[0026] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0027] It should be noted that if any directional indication (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.) is involved in the embodiments of this utility model, the directional indication is only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0028] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0029] like Figure 1 As shown, a lighting control circuit with a Hall effect sensor includes:

[0030] Power supply J1, the first and second terminals of which are connected to control chip U2 through a voltage regulator circuit, the voltage regulator circuit including LED lamp D1;

[0031] Control chip U1, the first pin of which is connected to the first pin of control chip U2.

[0032] A Hall effect sensing module, comprising a resistor R9, a Hall effect sensor Q2, a capacitor C7, a capacitor C8, and a resistor R8;

[0033] The first electrode of the Hall effect sensor Q2 is connected to the resistor R9;

[0034] The two ends of the capacitor C8 are connected to the first terminal of the Hall effect sensor Q2 and the second terminal of the Hall effect sensor, respectively.

[0035] The third electrode of the Hall effect sensor Q2 is connected to the resistor R8, and a capacitor C7 is connected between the third electrode and the resistor R8.

[0036] One end of the resistor R9 is connected to the first pin of the control chip U1.

[0037] Resistor R8 is connected to pin 7 of control chip U1;

[0038] The LED driver module includes resistors R2 and R3, and an NPN transistor Q1.

[0039] One end of the resistor R2 is connected to the fifth pin of the control chip U1, and the other end is connected to the NPN transistor Q1. The resistor R3 is connected in parallel between the resistor R2 and the NPN transistor Q1.

[0040] The NPN transistor Q1 is connected to relays J2 and J3;

[0041] The other end of the relay J2 is connected to the second pin of the power supply J1;

[0042] The other end of the relay J3 is connected to the first pin of the control chip U2.

[0043] In practical design, it has the following advantages:

[0044] 1. Modular design of the circuit: power input → 5V regulation → power supply to each module, making the circuit design simpler and more stable;

[0045] 2. Hall effect sensor Q2 detects the magnetic field → the signal is filtered and transmitted to the microcontroller (U1), which then turns on the LED D1. That is, the control chip U1 processes the input signal → and controls the LED response, brightness, and on-time of the LED D1 through the Q1 driving circuit.

[0046] 3. Program updates / debugging are completed through the J4 interface of the control chip U1; that is, the magnetic field size of the Hall effect sensor Q2 can be set according to actual needs to obtain the opening threshold.

[0047] The LED light is controlled by detecting the magnetic field using a Hall effect sensor Q2, which is simple and stable.

[0048] Specifically, the voltage regulator circuit includes an input filter capacitor C1, an LED lamp D1, and a resistor R1;

[0049] The two ends of the input filter capacitor C1 are connected to the first pin of the power supply J1, and the other end is connected to the vin pin of the control chip U2.

[0050] Specifically, the control chip U2 is a linear voltage regulator chip that stabilizes the input voltage to 5V;

[0051] The input filter capacitor C1, LED D1, and resistor R1 suppress input fluctuations, reduce flickering when the cabinet door is opened, and improve the stability of the light source; they also provide a stable, low-noise 5V power supply for the entire system.

[0052] Specifically, the power supply J1 is a DC power supply, a charging power supply or a low-voltage power supply, and a 5V power supply. Of course, it can also be AC ​​mains power, which is converted to DC power and then stepped down to a safe voltage, such as below 36V.

[0053] Specifically, the control chip U2 is model STI3508CB. The STI3508CB is a constant-frequency, peak-current-mode boost converter in an SOT23-5 package, suitable for small, low-power applications. The STI3508CB has a switching frequency of 1.2MHz, allowing the use of tiny, low-cost capacitors and inductors with a height of less than 2mm. Internal soft-start generates a small inrush current, extending battery life.

[0054] Specifically, the Hall effect sensor Q2 is model number DH627S.

[0055] The DH627S is an omnipolar Hall effect sensor based on mixed-signal CMOS technology. This sensor employs advanced chopper stabilization technology, thus providing an accurate and stable magnetic switching point.

[0056] In its circuit design, the DH627S provides an embedded controlled clock mechanism to supply a clock source for the Hall effect device and analog signal processing circuitry. This controlled clock mechanism can also issue control signals to periodically put current-consuming circuits into a "sleep" mode. Similarly, through this mechanism, the chip is periodically "wake up" and detects the strength of the external magnetic field passing through the Hall effect device based on a predetermined magnetic field strength threshold. If the magnetic flux density is higher than the "operating point" threshold or lower than the "release point" threshold, the open-drain output transistor is driven and latched into the corresponding state. During the "sleep" cycle, the output transistor is locked in its previous state. In battery-powered applications, this design provides the best support for extending operating life.

[0057] The output transistor of the DH627S will be locked in the on (BoP) state when there is a strong south or north magnetic field on the side facing the package markings, and locked in the off (BRP) state when there is no magnetic field.

[0058] Specifically, the control chip U1 is model FT61FC41-RB.

[0059] Specifically, capacitor C1, the GND terminal of control chip U2, capacitor C2, the fourth pin of control chip U1, the eighth pin of control chip U1, capacitor C8 and Hall effect sensor Q2, resistor R3, and NPN transistor Q1 are respectively grounded.

[0060] This reduces interference from external electromagnetic sources.

[0061] Specifically, the control chip U1 is equipped with an external J4 interface, which facilitates debugging.

[0062] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A lighting control circuit with a Hall effect sensor, characterized in that, include; Power supply J1, the first and second terminals of which are connected to control chip U2 through a voltage regulator circuit, the voltage regulator circuit including LED lamp D1; Control chip U1, the first pin of which is connected to the first pin of control chip U2. A Hall effect sensing module, comprising a resistor R9, a Hall effect sensor Q2, a capacitor C7, a capacitor C8, and a resistor R8; The first electrode of the Hall effect sensor Q2 is connected to the resistor R9; The two ends of the capacitor C8 are connected to the first terminal of the Hall effect sensor Q2 and the second terminal of the Hall effect sensor, respectively. The third electrode of the Hall effect sensor Q2 is connected to the resistor R8, and a capacitor C7 is connected between the third electrode and the resistor R8. One end of the resistor R9 is connected to the first pin of the control chip U1. Resistor R8 is connected to pin 7 of control chip U1; The LED driver module includes resistors R2 and R3, and an NPN transistor Q1. One end of the resistor R2 is connected to the fifth pin of the control chip U1, and the other end is connected to the NPN transistor Q1. The resistor R3 is connected in parallel between the resistor R2 and the NPN transistor Q1. The NPN transistor Q1 is connected to relays J2 and J3; The other end of the relay J2 is connected to the second pin of the power supply J1; The other end of the relay J3 is connected to the first pin of the control chip U2.

2. The lighting control circuit with a Hall effect sensor as described in claim 1, characterized in that: The voltage regulator circuit includes an input filter capacitor C1, an LED lamp D1, and a resistor R1; The two ends of the input filter capacitor C1 are connected to the first pin of the power supply J1, and the other end is connected to the vin pin of the control chip U2.

3. The lighting control circuit with a Hall effect sensor as described in claim 1, characterized in that: The power supply J1 is a DC power supply, a charging power supply or a low-voltage power supply, and a 5V power supply.

4. The lighting control circuit with a Hall effect sensor as described in claim 1, characterized in that: The control chip U2 is model STI3508CB.

5. The lighting control circuit with a Hall effect sensor as described in claim 1, characterized in that: The Hall effect sensor Q2 is model number DH627S.

6. The lighting control circuit with a Hall effect sensor as described in claim 1, characterized in that: The control chip U1 is model FT61FC41-RB.

7. The lighting control circuit with a Hall effect sensor as described in claim 1, characterized in that: The capacitor C1, the GND terminal of the control chip U2, the capacitor C2, the fourth pin of the control chip U1, the eighth pin of the control chip U1, the capacitor C8 and the Hall effect sensor Q2, the resistor R3, and the NPN transistor Q1 are respectively grounded.

8. The lighting control circuit with a Hall effect sensor as described in claim 1, characterized in that: The control chip U1 is equipped with an external J4 interface.

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