CN218995923U

CN218995923U - One-key multifunctional control circuit

Info

Publication number: CN218995923U
Application number: CN202223552880.2U
Authority: CN
Inventors: 吴正华; 詹舵; 龚宇; 舒明星
Original assignee: Shenzhen Gold Corolla Electronics Co ltd
Current assignee: Shenzhen Gold Corolla Electronics Co ltd
Priority date: 2022-12-29
Filing date: 2022-12-29
Publication date: 2023-05-09
Anticipated expiration: 2032-12-29

Abstract

The utility model is suitable for the field of electric appliance control, and provides a one-key multifunctional control circuit, wherein a button SW1 is pressed down to enable a PMOS tube M1 to be conducted, so that a rear-end circuit is powered on, and an MCU controls an MCU-LOCK to output a high level to enable the PMOS tube M1 to be conducted all the time; the control of other functions can be realized by double clicking the SW1 or by pressing the SW1 at different frequencies and matching with MCU control; when the key SW1 is pressed for a long time, the MCU detects the MCU-IO signal, so that the MCU is controlled to output a low level, and shutdown is realized. The utility model can realize one key to realize multiple functions, effectively reduce the area of the controller and ensure that the product has small volume; the cost of the components selected by the whole circuit is low, and common conventional components are adopted; the circuit has good universality and timeliness and high reliability; the selected devices and materials are all universal, the industrialization of the circuit is easy to realize, the circuit consistency is good, and the method has popularization significance.

Description

One-key multifunctional control circuit

Technical Field

The utility model belongs to the field of electric appliance control, and particularly relates to a one-key multifunctional control circuit.

Background

Electronic and electric products used in our daily life have the functions of many products switched by keys. Meanwhile, with the improvement of life quality of people, the pursuit of products is to meet the requirement that the volume is as small as possible.

However, most of the existing multifunctional electronic products use a plurality of keys to control different functions, and although the multifunctional requirements of the products are met, the volume of the products becomes large due to the plurality of control keys, and the products are not suitable for carrying and operating.

To avoid the above-mentioned problems, it is necessary to provide a one-touch multifunctional control circuit to overcome the drawbacks of the prior art.

Disclosure of Invention

An object of an embodiment of the present utility model is to provide a one-key multifunctional control circuit, which aims to solve the problems mentioned in the background art.

The embodiment of the utility model is realized in such a way, a one-key multifunctional control circuit comprises a PMOS tube M1, wherein the PMOS tube M1 controls the output of VCC_OUT, the S pole of the PMOS tube M1 is connected with a resistor R2, the other end of the resistor R2 is connected with the G pole of the PMOS tube M1, the G pole of the PMOS tube M1 is connected with the anode of a diode D2 and the collector of a triode Q1, the cathode of the diode D2 is connected with the cathode of the diode D1 and a switch SW1, the anode of the diode D1 is connected with the detection port of the resistor R1 and the MCU-IO, the other end of the resistor R1 is connected with a power supply VDD, the base of the triode Q1 is connected with a resistor R3 and a resistor R4, the other end of the resistor R3 is connected with the MCU-LOCK, and the other end of the resistor R4 is connected with GND.

According to a further technical scheme, the triode Q1 is an NPN triode.

According to a further technical scheme, the MCU-LOCK and the MCU-IO are connected with control pins of a single chip Microcomputer (MCU) chip.

Compared with the prior art, the utility model has the following beneficial effects:

1. the utility model can realize multiple functions by one key, and simultaneously control the standby power consumption, effectively reduce the area of the controller and ensure that the product is small in volume;

2. the cost of the components selected by the whole circuit is low, and the whole circuit adopts common conventional components, so that the economic benefit is quite considerable;

3. the circuit has good universality and timeliness and high reliability;

4. the circuit has the advantages of industrialization, the selected devices and materials are universal, the industrialization of the circuit is easy to realize, and the circuit is verified through a series of tests, so that the circuit has good consistency and popularization significance.

Drawings

Fig. 1 is a schematic circuit diagram of the present utility model.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Specific implementations of the utility model are described in detail below in connection with specific embodiments.

As shown in fig. 1, the circuit mainly comprises:

the main control circuit: the output of VCC_OUT is controlled by the PMOS tube M1. One end of the resistor R2 is connected to the S pole of the PMOS tube M1, and the other end is connected to the G pole of the PMOS tube M1.

Detection and key circuit: the device consists of a resistor R1, a power supply VDD, a detection port of an MCU-IO and an anode of a diode D1, wherein one end of the resistor R1 is connected with the power supply VDD, the other end of the resistor R1 is connected with the detection port of the MCU-IO, a cathode of the diode D1 is connected with a switch SW1 and a cathode of a diode D2, and the anode of the diode D2 is connected with a G pole of a PMOS tube M1 and a collector of an NPN triode Q1.

Self-locking circuit: the MCU-LOCK control signal is used for controlling the base electrode of the NPN triode Q1 through a resistor R3. The base electrode of the triode Q1 is connected with a resistor R4, and the other end of the resistor R4 is grounded, so that the triode Q1 is prevented from being misled.

Working principle:

before the SW1 key is not pressed, the voltages at the two ends of GS of the PMOS tube M1 are the same, the PMOS tube M1 is not conducted, after the key is pressed, the voltage flows to the ground through the diode D2 through the R2, and the PMOS tube M1 is conducted to supply power to a later-stage circuit. After the later-stage circuit is powered on, a singlechip (MCU) controls the MCU-LOCK to output high level, and controls the PMOS tube M1 to be continuously conducted.

When the key SW1 is pressed after power-on, the VDD voltage flows to the ground through the diode D1 and through the diode SW1, and the level of MCU-IO is changed from high to low. The signal of MCU-IO can be effectively detected by MCU by double clicking SW1 or according to SW1 at different time intervals, thereby realizing control of different functions.

When the MCU detects that the MCU-IO is continuously low in level, the system executes shutdown processing, the MCU controls the MCU-LOCK to output low level, the Q1 is turned off, and after the key SW1 is released, shutdown is realized.

The MCU-LOCK and the MCU-IO are both directly connected to the control pins of the MCU chip.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims

1. The utility model provides a multi-functional control circuit of a key, includes PMOS pipe M1, the output of VCC_OUT is controlled to PMOS pipe M1, its characterized in that, PMOS pipe M1 'S S utmost point is connected with resistance R2, resistance R2' S the other end is connected at PMOS pipe M1 'S G utmost point, diode D2' S positive pole and triode Q1 'S collecting electrode are connected to PMOS pipe M1' S G utmost point, diode D1 'S negative pole and switch SW1 are connected to diode D2' S negative pole, diode D1 'S positive pole connects resistance R1 and MCU-IO' S detection mouth, power VDD is connected to resistance R1 'S the other end, triode Q1' S base connecting resistance R3 and resistance R4, MCU-LOCK is connected to resistance R3 'S the other end, GND is connected to resistance R4' S the other end.

2. The one-key multifunctional control circuit according to claim 1, wherein the transistor Q1 is an NPN transistor.

3. The one-touch multi-function control circuit of claim 1, wherein the MCU-LOCK and the MCU-IO are both connected to control pins of the MCU chip.