Hardware switch detection circuit
By using Hall transistors and Hall components to replace MCU chips in the on-board refrigerator switch detection circuit, the problem of high manufacturing costs in the prior art is solved, and the effect of reducing production costs is achieved.
Patent Information
- Application Number
- CN202420090406.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-15
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-01-15
AI Technical Summary
The manufacturing cost of existing vehicle-mounted refrigerator switch detection circuits is high, and it is necessary to change the circuit settings to reduce production costs.
The hardware switch detection circuit consisting of Hall transistor Q1, Hall components and LED lamps is abandoned, and the use of MCU chips is used to detect the status of the object through Hall components and control the activation and closing of the LED lamp.
By changing the circuit settings, the production cost is effectively reduced, and the switch detection function is realized.
Smart Images
Figure CN222482382U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a vehicle-mounted refrigerator, in particular to a hardware switch detection circuit. Background Art
[0002] like Figure 1 As shown, one of the solutions of a car refrigerator switch detection circuit is specifically composed of an MCU chip, a transistor Q1, a first connector CN1, a second connector CN2, a first resistor R1, a second resistor R2, and a third resistor R3. The first connector CN1 is connected to a door switch, and the second connector CN2 is connected to an LED light.
[0003] When the door is closed, the MCU chip detects the signal sent by the door switch, and then the MCU chip drives the transistor Q1 to conduct, so that the LED light can be powered and turned on. However, the switch detection control solution has a high manufacturing cost. Summary of the invention
[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a hardware switch detection circuit, which effectively controls and reduces production costs by changing circuit settings.
[0005] According to a hardware switch detection circuit of the utility model, the circuit includes a Hall transistor Q1 and a connector CN1, the Hall transistor Q1 and the connector CN1 are connected, and also includes a Hall element for detection, the base of the Hall transistor is connected to the E pin of the Hall element, the connector CN1 is connected to an LED lamp, the B pin of the Hall element is connected to a 5V power supply end, and the 1 pin of the connector CN1 is connected to a 12V / 24V power supply end.
[0006] Specifically, the B pin of the Hall element is connected to the 5V power supply terminal via a third resistor R3.
[0007] Specifically, the base of the Hall transistor Q1 is connected to the E pin of the Hall element via a first resistor R1.
[0008] Specifically, a second capacitor C2 is connected to a common end between the E pin of the Hall element and the first resistor R1 , and the second capacitor C2 is also connected to a ground terminal GND.
[0009] Specifically, a second resistor R2 is connected to a common end between the E pin of the Hall element and the first resistor R1.
[0010] Specifically, the C pin of the Hall element is further connected to a first capacitor C1, and one end of the first capacitor C1 is connected to a 5V power supply end.
[0011] The beneficial effects of the utility model are as follows: the circuit is composed of a Hall transistor Q1, a Hall element and an LED lamp, and by changing the circuit setting, the use of an MCU chip is abandoned, thereby effectively controlling and reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings.
[0013] Figure 1 It is a circuit diagram of the prior art.
[0014] Figure 2 It is a circuit diagram of the utility model. DETAILED DESCRIPTION
[0015] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.
[0016] Reference below Figure 2 A hardware switch detection circuit according to an embodiment of the utility model is described, including a Hall transistor Q1 and a connector CN1, the Hall transistor Q1 and the connector CN1 are connected, and also includes a Hall element for detection, the base of the Hall transistor is connected to the E pin of the Hall element, the connector CN1 is connected to an LED lamp, the B pin of the Hall element is connected to a 5V power supply terminal, and the 1 pin of the connector CN1 is connected to a 12V / 24V power supply terminal.
[0017] This circuit is composed of Hall transistor Q1, Hall element and LED lamp. By changing the circuit settings and giving up the use of MCU chip, the production cost can be effectively controlled and reduced.
[0018] Among them, the Hall element detects the state of the object, for example, when the door is closed, the Hall element outputs an electrical signal to the base of the Hall transistor Q1 and turns on, and the LED lamp connected to the Hall transistor Q1 is powered and turns on. On the contrary, when the door is closed and opened, the Hall element is disconnected and stops outputting electrical signals, causing the base of the Hall transistor Q1 to lose power and disconnect, and the LED lamp stops turning on. In addition, pin 2 of connector C1 is connected to the collector of the Hall transistor Q1. In this circuit, either the 12V power supply terminal or the 24V power supply terminal inputs a voltage to pin 1 of connector CN1.
[0019] Specifically, the B pin of the Hall element is connected to the 5V power supply terminal via a third resistor R3. The third resistor R3 is used to limit the voltage and protect the Hall element.
[0020] Specifically, the base of the Hall transistor Q1 is connected to the E pin of the Hall element via a first resistor R1. The first resistor R1 is used to protect the base of the Hall transistor Q1.
[0021] Specifically, the common end between the E pin of the Hall element and the first resistor R1 is connected to a second capacitor C2, and the second capacitor C2 is also connected to a ground terminal GND. The second capacitor C2 plays a role in voltage stabilization.
[0022] Specifically, the common end between the E pin of the Hall element and the first resistor R1 is connected to a second resistor R2. The second resistor R2 plays a role of voltage division to reduce the influence of voltage on the Hall element. The other end of the second resistor R2 is connected to the 5V power supply end.
[0023] Specifically, the C pin of the Hall element is also connected to a first capacitor C1, one end of which is connected to a 5V power supply terminal. The first capacitor C1 is used to filter out high-frequency noise in the electrical signal to prevent the circuit from self-excitation and stabilize the circuit working state.
[0024] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.
Claims
1. A hardware switch detection circuit, comprising a Hall transistor Q1 and a connector CN1, wherein the Hall transistor Q1 and the connector CN1 are connected, and characterized in that: It also includes a Hall element for detection, the base of the Hall transistor is connected to the E pin of the Hall element, the connector CN1 is connected to an LED light, the B pin of the Hall element is connected to a 5V power supply terminal, and the 1 pin of the connector CN1 is connected to a 12V / 24V power supply terminal.
2. A hardware switch detection circuit according to claim 1, characterized in that: The B pin of the Hall element is connected to the 5V power supply terminal via a third resistor R3.
3. A hardware switch detection circuit according to claim 1, characterized in that: The base of the Hall transistor Q1 is connected to the E pin of the Hall element via a first resistor R1.
4. A hardware switch detection circuit according to claim 3, characterized in that: A second capacitor C2 is connected to a common end between the E pin of the Hall element and the first resistor R1 , and the second capacitor C2 is also connected to a ground terminal GND.
5. A hardware switch detection circuit according to claim 3, characterized in that: A second resistor R2 is connected to a common end between the E pin of the Hall element and the first resistor R1.
6. A hardware switch detection circuit according to claim 3, characterized in that: The C pin of the Hall element is also connected to a first capacitor C1, and one end of the first capacitor C1 is connected to a 5V power supply end.