Multifunctional camera false battery circuit

Abstract

The utility model discloses a multifunctional camera false battery circuit, which comprises an input circuit, an output circuit, a voltage regulation circuit, a camera communication circuit and a control circuit, the input circuit is connected with the output circuit, the input circuit is used for accessing a power adapter with adjustable output voltage, and the output circuit is used for supplying power to the camera; the control circuit is connected with the output circuit through the camera communication circuit, and the camera communication circuit enables the camera to communicate with the control circuit; the control circuit is connected with the input circuit and can communicate with the power adapter through the output circuit. When the multifunctional camera false battery circuit is used, the power adapter can be controlled to output the output voltage matched with the power supply voltage of the camera according to the power supply voltage requirement of the camera, so that the power supply requirements of different types of cameras can be met, and the universality is good.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of camera, especially a kind of multifunctional camera false battery circuit. BACKGROUND

[0002] Many existing cameras are powered by batteries, and the camera cannot be used for shooting when the battery is charging, which greatly affects the use of the camera. Therefore, the user simulates the battery camera false battery has been developed, one end of the camera false battery has the same shape and contact as the camera battery, so as to be installed in the battery compartment of the camera, and the other end of the camera false battery is connected to the external power supply. Whether the camera battery compartment cover is closed or not, it does not affect the normal use of the camera. The user can continuously power the camera through the camera false battery and ensure that the camera can shoot normally, which improves the available time of the camera.

[0003] However, the existing camera false battery can only provide one output voltage, while different types of cameras have different power supplies (5V, 9V, 12V, etc.). Therefore, the existing camera false battery cannot meet the power supply requirements of different types of cameras.

[0004] In view of the above problems, it is necessary to study a kind of multifunctional camera false battery circuit to overcome the problem that the existing camera false battery cannot meet the power supply requirements of different types of cameras. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a kind of multifunctional camera false battery circuit to overcome the problem that the existing camera false battery cannot meet the power supply requirements of different types of cameras.

[0006] In order to achieve the above purpose, the solution of the utility model is as follows:

[0007] A kind of multifunctional camera false battery circuit, it includes input circuit, output circuit, voltage adjustment circuit, camera communication circuit and control circuit;Input circuit connects output circuit, input circuit is used to access output voltage adjustable power adapter, and output circuit is used to power camera;Control circuit is connected with output circuit by camera communication circuit, and camera communication circuit can make camera and control circuit communicate;Control circuit connects input circuit and control circuit can communicate with power adapter by output circuit.

[0008] The input circuit includes input terminal J1, the VI+ foot and VI- foot of input terminal J1 are connected with the positive voltage end and negative voltage end of input circuit respectively, the negative voltage end of input circuit is grounded, the CC1 foot and CC2 foot of input terminal J1 are the first communication end and second communication end of input circuit respectively;

[0009] The output circuit includes an output terminal J2. The VO+ and VO- pins of the output terminal J2 are respectively connected to the positive voltage terminal and the negative voltage terminal of the output circuit. The D pin of the output terminal J2 is connected to the communication terminal of the output circuit. The positive voltage terminal of the output circuit is connected to the positive voltage terminal of the input circuit, and the negative voltage terminal of the output circuit is grounded.

[0010] The camera communication circuit includes a composite transistor IC1, a composite transistor IC2, a diode D1, a resistor R3, and a resistor R7. Pin C1 of composite transistor IC1, the first terminal of resistor R7, and the cathode of diode D1 are connected to the composite communication terminal of the camera communication circuit. Pin B2 of composite transistor IC1 is connected to the first communication terminal of the camera communication circuit. Pin C1 of composite transistor IC1, the second terminal of resistor R7, and the first terminal of resistor R3 are connected to the second communication terminal of the camera communication circuit. Pins E2 of composite transistor IC1 and IC2, and the second terminal of resistor R3 are connected to power supply VDD2. Pins E1 of composite transistor IC1 and IC2 are grounded. Pins B1 and C2 of composite transistor IC1 and IC2 are connected. Pin B2 of composite transistor IC2 is connected to the anode of diode D1. The composite communication terminal of the camera communication circuit is connected to the communication terminal of the output circuit.

[0011] The control circuit includes a control chip U1, a Zener diode ZD1, a Zener diode ZD2, and a resistor R5. The VDD pin of the control chip U1 is connected to the power supply VDD1, and the VCC pin of the control chip U1 is connected to the positive voltage terminal of the input circuit through the resistor R5. The VSS, IS-, and GND pins of the control chip U1 are grounded. The D+ pin of the control chip U1 is connected to the first communication terminal of the camera communication circuit, and the D- pin of the control chip U2 is connected to the second communication terminal of the camera communication circuit. The CC1 pin of the control chip U2 is connected to the negative terminal of the Zener diode ZD1 and the first communication terminal of the input circuit, and the CC2 pin of the control chip U2 is connected to the negative terminal of the Zener diode ZD2 and the second communication terminal of the input circuit. The positive terminals of the Zener diodes ZD1 and ZD2 are grounded.

[0012] The input circuit also includes a capacitor C1 and a fuse F1. The VI+ pin of the input terminal J1 is connected to the positive voltage terminal of the input circuit through the fuse F1. The first end of the capacitor C1 is connected to the positive voltage terminal of the input circuit, and the second end of the capacitor C1 is grounded.

[0013] The output circuit also includes capacitor C4, Zener diode ZD3 and Zener diode ZD4. The negative terminal of Zener diode ZD3 and the first terminal of capacitor C4 are connected to the positive voltage terminal of the output circuit. The negative terminal of Zener diode ZD4 is connected to the communication terminal of the output circuit. The positive terminals of Zener diode ZD3 and ZD4 and the second terminal of capacitor C4 are grounded.

[0014] The control circuit also includes capacitors C2 and C3. The first end of capacitor C2 is connected to the VDD pin of control chip U1, the first end of capacitor C3 is connected to the VCC pin of control chip U1, and the second ends of capacitors C2 and C3 are grounded.

[0015] The multi-functional camera dummy battery circuit also includes an overvoltage detection circuit and an output switch circuit. The input terminal of the overvoltage detection circuit is connected to the positive voltage terminal of the output circuit. The output terminal of the overvoltage detection circuit is connected to the GATE pin of the control chip U1 and the control terminal of the output switch circuit. The positive voltage terminal of the input circuit is connected to the positive voltage terminal of the output circuit through the output switch circuit. The input terminal and output terminal of the output switch circuit are respectively connected to the positive voltage terminal of the input circuit and the positive voltage terminal of the output circuit.

[0016] The overvoltage detection circuit includes resistors R8 and R9, comparator OP1, and a digital reference voltage setting circuit. The first end of resistor R8 is connected to the input terminal of the overvoltage detection circuit. The second end of resistor R8 and the first end of resistor R9 are connected to the non-inverting input terminal of comparator OP1. The inverting input terminal of comparator OP1 is connected to the output terminal of the digital reference voltage setting circuit. The control terminal of the digital reference voltage setting circuit is connected to the VFB pin of the control chip U1. The output terminal of comparator OP1 is connected to the output terminal of the overvoltage detection circuit.

[0017] The output switching circuit includes a MOSFET Q1, a resistor R1, and a resistor R2. The drain of the MOSFET Q1 is connected to the input terminal of the output switching circuit. The source of the MOSFET Q1 and the first end of the resistor R1 are connected to the output terminal of the output switching circuit. The gate of the MOSFET Q1 is connected to the second end of the resistor R1 and the first end of the resistor R2. The second end of the resistor R2 is connected to the control terminal of the output switching circuit.

[0018] The control chip U1 is a WT6616 control chip manufactured by Weltrend Electronics Co., Ltd.

[0019] The power supply VDD1 is connected to the power supply VDD2 through resistors R4 and R6. The first end of resistor R4 is connected to the power supply VDD1, and the second end of resistor R4 and the first end of resistor R6 are connected to the voltage VDD2. The second end of resistor R6 is grounded.

[0020] With the above solution, when using the multifunctional camera dummy battery circuit of this invention, the input circuit is connected to a power adapter with adjustable output voltage, and the output circuit is connected to the camera. The control circuit first communicates with the camera through the camera communication circuit to obtain the camera's power supply voltage information. Then, the control circuit communicates with the power adapter to output the camera's power supply voltage information to the power adapter, causing the power adapter to automatically adjust its output voltage to match the camera's power supply voltage. As can be seen from the foregoing, when using the multifunctional camera dummy battery circuit of this invention, it can control the power adapter to output a voltage that matches the camera's power supply voltage according to the camera's power supply voltage requirements, thereby meeting the power supply needs of different types of cameras and exhibiting good versatility. Attached Figure Description

[0021] Figure 1 This is the circuit schematic diagram of this utility model. Detailed Implementation

[0022] To further explain the technical solution of this utility model, the following detailed description is provided through specific embodiments.

[0023] like Figure 1 As shown, this utility model discloses a multifunctional camera dummy battery circuit, which includes an input circuit, an output circuit, a voltage adjustment circuit, a camera communication circuit, and a control circuit. The input circuit is connected to the output circuit and is used to connect to a power adapter with an adjustable output voltage. The output circuit is used to power the camera. The control circuit is connected to the output circuit through the camera communication circuit, which enables the camera to communicate with the control circuit. The control circuit is connected to the input circuit and can communicate with the power adapter through the output circuit.

[0024] In use, the multifunctional camera dummy battery circuit of this invention connects the input circuit to a power adapter with adjustable output voltage, and the output circuit to the camera. The control circuit first communicates with the camera via the camera communication circuit to obtain the camera's power supply voltage information. Then, the control circuit communicates with the power adapter to output the camera's power supply voltage information, causing the power adapter to automatically adjust its output voltage to match the camera's power supply voltage. As can be seen from the foregoing, the multifunctional camera dummy battery circuit of this invention can control the power adapter to output a voltage that matches the camera's power supply voltage requirements, thus meeting the power supply needs of different types of cameras and exhibiting good versatility. The power adapter can be any existing power adapter that supports fast charging protocols.

[0025] In an embodiment of this utility model, the input circuit includes an input terminal J1, with pins VI+ and VI- connected to the positive and negative voltage terminals of the input circuit, respectively. The negative voltage terminal of the input circuit is grounded. Pins CC1 and CC2 of the input terminal J1 are connected to the first and second communication terminals of the input circuit, respectively. The output circuit includes an output terminal J2, with pins VO+ and VO- connected to the positive and negative voltage terminals of the output circuit, respectively. Pin D of the output terminal J2 is connected to the communication terminal of the output circuit. The positive voltage terminal of the output circuit is grounded. The positive voltage terminal of the input circuit is connected to the negative voltage terminal of the output circuit, and the negative voltage terminal of the output circuit is grounded. The camera communication circuit includes a composite transistor IC1, a composite transistor IC2, a diode D1, a resistor R3, and a resistor R7. Pin C1 of the composite transistor IC1, the first terminal of resistor R7, and the cathode of diode D1 are connected to the composite communication terminal of the camera communication circuit. Pin B2 of the composite transistor IC1 is connected to the first communication terminal of the camera communication circuit. Pin C1 of the composite transistor IC1, the second terminal of resistor R7, and the first terminal of resistor R3 are connected to the second communication terminal of the camera communication circuit. Pin E2 of the composite transistor IC1, the composite transistor IC2, the negative voltage terminal of the output circuit, and the negative voltage terminal of the output circuit are grounded. Pin E2 of IC2 and the second terminal of resistor R3 are connected to power supply VDD2. Pins E1 of IC1 and IC2 are grounded. Pins B1 and C2 of IC1 and IC2 are connected. Pin B2 of IC2 is connected to the positive terminal of diode D1. The composite communication terminal of the camera communication circuit is connected to the communication terminal of the output circuit. The control circuit includes control chip U1, Zener diode ZD1, Zener diode ZD2, and resistor R5. Pin VDD of control chip U1 is connected to power supply VDD1. The VCC pin of control chip U1 is connected to the positive voltage terminal of the input circuit through resistor R5. The VSS, IS-, and GND pins of control chip U1 are grounded. The D+ pin of control chip U1 is connected to the first communication terminal of the camera communication circuit. The D- pin of control chip U2 is connected to the second communication terminal of the camera communication circuit. The CC1 pin of control chip U2 is connected to the negative terminal of Zener diode ZD1 and the first communication terminal of the input circuit. The CC2 pin of control chip U2 is connected to the negative terminal of Zener diode ZD2 and the second communication terminal of the input circuit. The positive terminals of Zener diodes ZD1 and ZD2 are grounded.

[0026] It should be noted that the aforementioned composite transistors IC1 and IC2 are integrated composite transistors combining independent NPN and PNP transistors. Pins C1, B1, and E1 of the composite transistor are the collector, base, and emitter of the NPN transistor, respectively, while pins C2, B2, and E2 of the composite transistor are the collector, base, and emitter of the PNP transistor, respectively. For ease of understanding, the following describes the working principle of the control circuit communicating with the camera through the camera communication circuit:

[0027] When the control circuit sends information to the camera, if the D+ pin of the control chip U1 outputs a high-level signal, then both the PNP and NPN transistors of the composite transistor IC1 are not turned on, so that the D pin of the output terminal J2 remains at a high level; and if the D+ pin of the control chip U1 outputs a low-level signal, then both the PNP and NPN transistors of the composite transistor IC1 are turned on, so that the D pin of the output terminal J2 is pulled from a high level to a low level.

[0028] When the camera sends information to the control circuit, if the D pin of the output terminal J2 is connected to a high-level signal input from the camera, both the PNP and NPN transistors of the composite transistor IC2 will not conduct, keeping the D pin of the control chip U1 at a high level. If the D pin of the output terminal J2 is connected to a low-level signal input from the camera, both the PNP and NPN transistors of the composite transistor IC2 will conduct, pulling the D pin of the control chip U1 from high to low. The diode D1 increases the base voltage of the PNP transistor of the composite transistor IC2 to prevent voltage loss due to excessively long circuits, which could cause the PNP transistor of the composite transistor IC2 to mis-conduct.

[0029] In an embodiment of this invention, the input circuit further includes a capacitor C1 and a fuse F1. The VI+ pin of the input terminal J1 is connected to the positive voltage terminal of the input circuit via the fuse F1. The first end of the capacitor C1 is connected to the positive voltage terminal of the input circuit, and the second end of the capacitor C1 is grounded. The fuse F1 provides overcurrent protection, while the capacitor C1 stabilizes the voltage at the positive voltage terminal of the input circuit.

[0030] In an embodiment of this invention, the output circuit further includes a capacitor C4, a Zener diode ZD3, and a Zener diode ZD4. The negative terminal of Zener diode ZD3 and the first terminal of capacitor C4 are connected to the positive voltage terminal of the output circuit, the negative terminal of Zener diode ZD4 is connected to the communication terminal of the output circuit, and the positive terminals of Zener diodes ZD3 and ZD4 and the second terminal of capacitor C4 are grounded. Zener diode ZD3 prevents excessive voltage at the positive voltage terminal of the output circuit, Zener diode ZD4 prevents excessive voltage at the communication terminal of the output circuit, and capacitor C4 stabilizes the voltage at the positive voltage terminal of the output circuit.

[0031] In the embodiments of this utility model, the control chip U1 of the control circuit can be a WT6616 control chip manufactured by Weltrend Electronics Co., Ltd.

[0032] In an embodiment of this invention, the control circuit further includes capacitors C2 and C3. The first end of capacitor C2 is connected to the VDD pin of control chip U1, and the first end of capacitor C3 is connected to the VCC pin of control chip U1. The second ends of both capacitors C2 and C3 are grounded. Capacitor C2 stabilizes the voltage at the VDD pin of control chip U1, and capacitor C3 stabilizes the voltage at the VCC pin of control chip U1.

[0033] In an embodiment of this invention, the power supply VDD1 is connected to the power supply VDD2 via resistors R4 and R6. The first end of resistor R4 is connected to the power supply VDD1, and the second end of resistor R4 and the first end of resistor R6 are connected to the voltage VDD2. The second end of resistor R6 is grounded. This configuration ensures that the power supply VDD2 is obtained by voltage division from the power supply VDD1.

[0034] In an embodiment of this utility model, the multifunctional camera dummy battery circuit further includes an overvoltage detection circuit and an output switch circuit. The input terminal of the overvoltage detection circuit is connected to the positive voltage terminal of the output circuit; the output terminal of the overvoltage detection circuit is connected to the GATE pin of the control chip U1 and the control terminal of the output switch circuit; the positive voltage terminal of the input circuit is connected to the positive voltage terminal of the output circuit through the output switch circuit, and the input and output terminals of the output switch circuit are respectively connected to the positive voltage terminals of the input circuit and the output circuit. The overvoltage detection circuit detects whether the voltage at the positive voltage terminal of the output circuit is too high. When the voltage at the positive voltage terminal of the output circuit is too high, the overvoltage detection circuit controls the output switch circuit to turn off, preventing the input circuit from supplying power to the output circuit, thereby achieving overvoltage protection. Simultaneously, the overvoltage detection circuit sends a signal to the control chip U1, enabling the control chip U1 to detect that the voltage at the positive voltage terminal of the output circuit is too high.

[0035] In an embodiment of this invention, the overvoltage detection circuit includes resistors R8 and R9, comparator OP1, and a digital reference voltage setting circuit. The first end of resistor R8 is connected to the input terminal of the overvoltage detection circuit. The second end of resistor R8 and the first end of resistor R9 are connected to the non-inverting input terminal of comparator OP1. The inverting input terminal of comparator OP1 is connected to the output terminal of the digital reference voltage setting circuit. The control terminal of the digital reference voltage setting circuit is connected to the VFB pin of control chip U1. The output terminal of comparator OP1 is connected to the output terminal of the overvoltage detection circuit. When the voltage at the positive voltage terminal of the output circuit is too high, the voltage at the non-inverting input terminal of comparator OP1 is higher than the voltage at the inverting input terminal of comparator OP1. Comparator OP1 outputs a high-level signal to control chip U1 and the output switch circuit, enabling control chip U1 to detect that the voltage at the positive voltage terminal of the output circuit is too high and to turn off the output switch circuit. Control chip U1 adjusts the voltage provided to the inverting input terminal of comparator OP1 by the digital reference voltage setting circuit according to the voltage at the positive voltage terminal of the input circuit, adapting to different types of camera usage scenarios.

[0036] In an embodiment of this utility model, the output switch circuit includes a MOSFET Q1, a resistor R1, and a resistor R2. The drain of the MOSFET Q1 is connected to the input terminal of the output switch circuit, the source of the MOSFET Q1 and the first end of the resistor R1 are connected to the output terminal of the output switch circuit, the gate of the MOSFET Q1 is connected to the second end of the resistor R1 and the first end of the resistor R2, and the second end of the resistor R2 is connected to the control terminal of the output switch circuit.

[0037] The above embodiments and figures are not intended to limit the product form and style of this utility model. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of this utility model.

Claims

1. A multi-function camera fake battery circuit, characterized by: The input circuit, the output circuit, the voltage adjustment circuit, the camera communication circuit and the control circuit are connected together. The input circuit is connected to the output circuit, and the input circuit is used to connect to the output voltage adjustable power adapter, and the output circuit is used to supply power to the camera. The control circuit is connected to the output circuit through the camera communication circuit, and the camera communication circuit enables the camera to communicate with the control circuit. The control circuit is connected to the input circuit, and the control circuit can communicate with the power adapter through the output circuit.

2. The multifunctional camera dummy battery circuit of claim 1, wherein: The input circuit includes an input terminal J1, the VI+ pin and the VI- pin of the input terminal J1 are respectively connected to the positive voltage end and the negative voltage end of the input circuit, the negative voltage end of the input circuit is grounded, and the CC1 pin and the CC2 pin of the input terminal J1 are respectively connected to the first communication end and the second communication end of the input circuit; The output circuit includes an output terminal J2, the VO+ pin and the VO- pin of the output terminal J2 are respectively connected to the positive voltage end and the negative voltage end of the output circuit, the D pin of the output terminal J2 is connected to the communication end of the output circuit, the positive voltage end of the output circuit is connected to the positive voltage end of the input circuit, and the negative voltage end of the output circuit is grounded; The camera communication circuit includes a compound tube IC1, a compound tube IC2, a diode D1, a resistor R3 and a resistor R7, the C1 pin of the compound tube IC1, the first end of the resistor R7 and the negative electrode of the diode D1 are connected to the composite communication end of the camera communication circuit, the B2 pin of the compound tube IC1 is connected to the first communication end of the camera communication circuit, the C1 pin of the compound tube IC1, the second end of the resistor R7 and the first end of the resistor R3 are connected to the second communication end of the camera communication circuit, the E2 pin of the compound tube IC1, the E2 pin of the compound tube IC2 and the second end of the resistor R3 are connected to the power supply VDD2, the E1 pin of the compound tube IC1 and the E1 pin of the compound tube IC2 are grounded, the B1 pin and the C2 pin of the compound tube IC1 are connected, the B1 pin and the C2 pin of the compound tube IC2 are connected, and the B2 pin of the compound tube IC2 is connected to the positive electrode of the diode D1; and the composite communication end of the camera communication circuit is connected to the communication end of the output circuit; The control circuit includes a control chip U1, a voltage stabilizing tube ZD1, a voltage stabilizing tube ZD2 and a resistor R5, the VDD pin of the control chip U1 is connected to the power supply VDD1, the VCC pin of the control chip U1 is connected to the positive voltage end of the input circuit through the resistor R5, the VSS pin, the IS- pin and the GND pin of the control chip U1 are grounded, the D+ pin of the control chip U2 is connected to the first communication end of the camera communication circuit, the D- pin of the control chip U2 is connected to the second communication end of the camera communication circuit, the CC1 pin of the control chip U2 is connected to the negative electrode of the voltage stabilizing tube ZD1 and the first communication end of the input circuit, the CC2 pin of the control chip U2 is connected to the negative electrode of the voltage stabilizing tube ZD2 and the second communication end of the input circuit, and the positive electrode of the voltage stabilizing tube ZD1 and the positive electrode of the voltage stabilizing tube ZD2 are grounded.

3. The multi-functional camera fake battery circuit of claim 2, wherein: The input circuit further includes a capacitor C1 and a fuse F1, the VI+ pin of the input terminal J1 is connected to the positive voltage end of the input circuit through the fuse F1, the first end of the capacitor C1 is connected to the positive voltage end of the input circuit, and the second end of the capacitor C1 is grounded.

4. The multi-functional camera fake battery circuit of claim 2, wherein: The output circuit further comprises a capacitor C4, a Zener ZD3 and a Zener ZD4, the negative electrode of the Zener ZD3 and the first end of the capacitor C4 are connected to the positive voltage end of the output circuit, the negative electrode of the Zener ZD4 is connected to the communication end of the output circuit, the positive electrode of the Zener ZD3, the positive electrode of the Zener ZD4 and the second end of the capacitor C4 are grounded.

5. The multi-functional camera fake battery circuit of claim 2, wherein: The control circuit further comprises a capacitor C2 and a capacitor C3, the first end of the capacitor C2 is connected to the VDD pin of the control chip U1, the first end of the capacitor C3 is connected to the VCC pin of the control chip U1, the second end of the capacitor C2 and the second end of the capacitor C3 are grounded.

6. The multi-functional camera fake battery circuit of claim 2, wherein: Further comprising an overvoltage detection circuit and an output switch circuit, the input end of the overvoltage detection circuit is connected to the positive voltage end of the output circuit; the output end of the overvoltage detection circuit is connected to the GATE pin of the control chip U1 and the control end of the output switch circuit; the positive voltage end of the input circuit is connected to the positive voltage end of the output circuit through the output switch circuit, and the input end and the output end of the output switch circuit are connected to the positive voltage end of the input circuit and the positive voltage end of the output circuit respectively.

7. The multi-functional camera fake battery circuit of claim 6, wherein: The overvoltage detection circuit comprises a resistor R8, a resistor R9, a comparator OP1 and a digital reference voltage setting circuit, the first end of the resistor R8 is connected to the input end of the overvoltage detection circuit, the second end of the resistor R8 and the first end of the resistor R9 are connected to the non-inverting input end of the comparator OP1, the inverting input end of the comparator OP1 is connected to the output end of the digital reference voltage setting circuit, the control end of the digital reference voltage setting circuit is connected to the VFB pin of the control chip U1, and the output end of the comparator OP1 is connected to the output end of the overvoltage detection circuit.

8. The multi-functional camera fake battery circuit of claim 6, wherein: The output switch circuit comprises a MOS tube Q1, a resistor R1 and a resistor R2, the drain electrode of the MOS tube Q1 is connected to the input end of the output switch circuit, the source electrode of the MOS tube Q1 and the first end of the resistor R1 are connected to the output end of the output switch circuit, the gate electrode of the MOS tube Q1 is connected to the second end of the resistor R1 and the first end of the resistor R2, and the second end of the resistor R2 is connected to the control end of the output switch circuit.

9. The multi-functional camera fake battery circuit of claim 2, wherein: The control chip U1 adopts a control chip with a model number of WT6616 produced by Wintek Electronics Co., Ltd.

10. The multi-functional camera fake battery circuit of claim 2, wherein: The power supply VDD1 is connected to the power supply VDD2 through a resistor R4 and a resistor R6, the first end of the resistor R4 is connected to the power supply VDD1, the second end of the resistor R4 and the first end of the resistor R6 are connected to the power supply VDD2, and the second end of the resistor R6 is grounded.

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