CN210629752U - Magnetic induction trigger circuit for Bluetooth sound box - Google Patents

Magnetic induction trigger circuit for Bluetooth sound box Download PDF

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Publication number
CN210629752U
CN210629752U CN201921865236.6U CN201921865236U CN210629752U CN 210629752 U CN210629752 U CN 210629752U CN 201921865236 U CN201921865236 U CN 201921865236U CN 210629752 U CN210629752 U CN 210629752U
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pin
resistor
capacitor
diode
amplifier
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郭志
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Nanjing Pangrui Technology Co ltd
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Nanjing Pangrui Technology Co ltd
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Abstract

The utility model relates to a magnetic force induction trigger circuit for a Bluetooth sound box, which belongs to the field of Bluetooth sound boxes, and comprises a magnetic induction module which utilizes a magnetic sensor to induce, a processing module which is used for receiving magnetic signals and processing signals, a control circuit switch and a trigger control module which is controlled by a power supply; the magnetic induction module receives signals through a magnetic sensor U1, is matched with a converter U2 to convert magnetic field signals into differential output voltage, and is also matched with a memory U3 to store the signals, so that the later waiting time is reduced; the processing module can better protect the circuit by utilizing the microprocessing chip U4 to be matched with the monitoring chip U5, and the double operational amplifier U6 can better compensate the internal frequency, so that the signal cannot be sounded in a noisy occasion in time; meanwhile, the magnetic induction switch can transmit a longer distance than a common switch.

Description

Magnetic induction trigger circuit for Bluetooth sound box
Technical Field
The utility model relates to a magnetic force induction trigger circuit for bluetooth speaker belongs to the bluetooth speaker field.
Background
With the development of wireless technology in China, the wireless technology is well accepted by people in the fields of environmental protection, transmission speed and convenience, and the technologies such as WIFI, Internet of things, Bluetooth transmission and the like all have a certain position in our daily life.
The Bluetooth sound box has basically replaced the traditional limited sound box, is in wireless connection with external equipment through an internal Bluetooth chip, transmits received signals to an audio amplification circuit through conversion and analog transmission, and finally utilizes oscillation frequency to realize sound transmission.
Because bluetooth technology's finiteness in the current bluetooth audio amplifier leads to if connecting device and bluetooth because the distance overlength, lead to transmission signal delay overlength, and when acting on some noisy occasions, anti-interference ability weakens to make audio amplifier tone quality worsen and appear the electric current sound.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: the utility model provides a magnetic force induction trigger circuit for bluetooth speaker solves the above-mentioned problem.
The technical scheme is as follows: a magnetic force induction trigger circuit for a Bluetooth speaker, comprising: the magnetic induction module is used for sensing by using a magnetic sensor, and comprises a processing module for receiving magnetic signals and processing the signals, a control circuit switch and a trigger control module controlled by a power supply.
In a further embodiment, the magnetic induction module includes a magnetic sensor U1, an amplifier B1, an amplifier B2, a converter U2, a memory U3, a fet a1, a fet a2, a diode D1, a diode D2, a diode D3, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a crystal capacitor C6, a capacitor C7, and an interface J1; pin 12 of the magnetic sensor U1 is simultaneously connected to one end of the resistor R1 and pin 5 of the amplifier B1, pin 13 of the magnetic sensor U1 is simultaneously connected to one end of the resistor R2 and pin 6 of the amplifier B1, pin 15 of the magnetic sensor U1 is simultaneously connected to one end of the resistor R4 and pin 3 of the amplifier B2, pin 16 of the magnetic sensor U1 is simultaneously connected to one end of the resistor R6 and pin 2 of the amplifier B2, pin 4 of the amplifier B1 is connected to one end of the resistor R3, pin 7 of the amplifier B1 is simultaneously connected to the other end of the resistor R3 and one end of the capacitor C1, pin 4 of the amplifier B2 is connected to one end of the resistor R5, pin 1 of the amplifier B2 is simultaneously connected to the other end of the resistor R5 and one end of the capacitor C2, the No. 8 pin of the amplifier B2 is simultaneously connected with the anode of the diode D1 and one end of the resistor R7; the No. 6 pin of the converter U2 is connected with the other end of the capacitor C1, the No. 8 pin of the converter U2 is connected with the other end of the capacitor C2, and the No. 11 pin of the converter U2 is connected with the other end of the resistor R7; pin 6 and pin 11 of the memory U3 are connected to the capacitor C7, pin 18 of the magnetic sensor U1 is connected to one end of the crystal oscillator capacitor C6, the other end of the crystal oscillator capacitor C6 is connected to the gate of the fet a1 and the gate of the fet a2, the drain of the fet a1 is connected to one end of the capacitor C3 and one end of the resistor R8, the source of the fet a1 is connected to one end of the resistor R9 and one end of the capacitor C4, the source of the fet a2 is connected to the other end of the capacitor C4, the other end of the resistor R9 is connected to the other end of the resistor R8, pin 10 of the memory U3 and the anode of the diode D2, the anode of the diode D3 is connected to pin 10 of the memory U3, the cathode of the diode D3 is connected to pin 13 of the memory U3, one end of the capacitor C5 is connected with the No. 13 pin of the memory U3.
In a further embodiment, No. 6 pin, No. 3 pin connection and ground of magnetic sensor U1, No. 8 pin and No. 9 pin connection of magnetic sensor U1, No. 2 pin and No. 3 pin connection and ground of magnetic sensor U1, No. 9 pin and No. 5 pin connection and ground of converter U2, No. 1 pin power input of converter U2, No. 12 pin and No. 4 pin connection and ground of memory U3, No. 13 pin power input of memory U3.
In a further embodiment, the processing module includes a microprocessor U4, a monitoring chip U5, a dual operational amplifier U6, a nand gate E1, a nand gate E2, a photocoupler U7, a photocoupler U8, a transistor Q1, a transistor Q2, a transistor Q3, a diode D4, a diode D5, a diode D6, a diode D7, a diode D8, a crystal oscillator X1, a capacitor C8, a capacitor C9, a capacitor C10, a capacitor C11, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a resistor R16, and a resistor R17; wherein the pin 4 of the microprocessor U4 is connected with the pin 1 of the crystal oscillator X1, the pin 5 of the microprocessor U4 is connected with the pin 2 of the crystal oscillator X1, the pin 1 of the microprocessor U4 is simultaneously connected with one end of the resistor R10 and the pin 4 of the monitor chip U5, the pin 5 of the monitor chip U5 is connected with the other end of the resistor R10, the pin 8 and the pin 9 of the microprocessor U4 are respectively connected with the pin 7 and the pin 6 of the dual operational amplifier U6, the pin 11 of the microprocessor U4 is simultaneously connected with the pin 5 of the dual operational amplifier U6 and the anode of the diode D7, the pin 4 of the dual operational amplifier U6 is connected with one end of the capacitor C9, the pin 2 and the pin 3 of the dual operational amplifier U6 is connected with one end of the resistor R14, the base electrode of the triode Q3 is simultaneously connected with the other end of the capacitor C9 and the other end of the resistor R14, the collector electrode of the triode Q3 is simultaneously connected with the negative electrode of the diode D7 and one end of the capacitor C10, and the emitter electrode of the triode Q3 is connected with one end of the resistor R15; pin 13 of the microprocessor U4 is connected to one end of the resistor R11 and one end of the capacitor C8, the positive terminal of the diode D4 is connected to the other end of the resistor R11 and the other end of the capacitor C8, pin 2 of the microprocessor U4 is connected to the input terminal of the nand gate E1 and the input terminal of the nand gate E2, the output terminal of the nand gate E1 is connected to pin 1 of the photocoupler U7 and the negative terminal of the diode D5, the positive terminal of the diode D5 is connected to pin 2 of the photocoupler U7, the output terminal of the nand gate E2 is connected to pin 1 of the photocoupler U8 and the negative terminal of the diode D6, the positive terminal of the diode D6 is connected to pin 2 of the photocoupler U8, pin 4 of the photocoupler U7 is connected to one end of the resistor R12, the other end of the resistor R12 is connected with the base of the triode Q1, the No. 4 pin of the photoelectric coupler U8 is connected with one end of the resistor R13, the other end of the resistor R13 is connected with the base of the triode Q2, the emitter of the triode Q1 is simultaneously connected with the cathode of the diode D4, the anode of the diode D8, one end of the capacitor C11 and one end of the resistor R17, the emitter of the triode Q2 is simultaneously connected with the cathode of the diode D8 and one end of the resistor R16, and the other end of the resistor R16 is simultaneously connected with the other end of the capacitor C11 and the other end of the resistor R17.
In a further embodiment, pin 3 of the microprocessor U4 is grounded, pin 8 of the monitor chip U5 is grounded, pin 6 of the monitor chip U5 is connected to a power supply, pin 1 of the dual operational amplifier U6 is grounded, and pin 8 of the dual operational amplifier U6 is connected to a power supply.
In a further embodiment, a transmitter S1 is provided in the processing module, and pin 6 of the transmitter S1 is connected to pin 14 of the microprocessor U4, and the transmitter transmits a signal to the trigger control module for control output.
Has the advantages that: the utility model adopts magnetic induction transmission in the internal circuit of the Bluetooth sound box, and utilizes the magnet and the induction coil to carry out relative displacement, thereby generating magnetic induction electromotive force and leading the circuit output end of the trigger control module to be conducted; the magnetic induction module receives signals through a magnetic sensor U1, is matched with a converter U2 to convert magnetic field signals into differential output voltage, and is also matched with a memory U3 to store the signals, so that the later waiting time is reduced; the processing module can better protect the circuit by utilizing the microprocessing chip U4 to be matched with the monitoring chip U5, and the double operational amplifier U6 can better compensate the internal frequency, so that the signal cannot be sounded in a noisy occasion in time; meanwhile, the magnetic induction switch can transmit a longer distance than a common switch.
Drawings
Fig. 1 is a circuit diagram of a magnetic induction module of the present invention;
fig. 2 is a circuit diagram of a processing module according to the present invention.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these details; in other instances, well-known features have not been described in order to avoid obscuring the present invention.
A magnetic force induction trigger circuit for a Bluetooth speaker, comprising: the device comprises a magnetic induction module, a processing module and a trigger control module.
Further, the magnetic induction module comprises a magnetic sensor U1, an amplifier B1, an amplifier B2, a converter U2, a memory U3, a field effect transistor A1, a field effect transistor A2, a diode D1, a diode D2, a diode D3, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a crystal oscillator capacitor C6, a capacitor C7 and an interface J1.
Further, the processing module comprises a microprocessor U4, a monitoring chip U5, a dual operational amplifier U6, a NAND gate E1, a NAND gate E2, a photocoupler U7, a photocoupler U8, a triode Q1, a triode Q2, a triode Q3, a diode D4, a diode D5, a diode D6, a diode D7, a diode D8, a crystal oscillator X1, a capacitor C8, a capacitor C9, a capacitor C10, a capacitor C11, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a resistor R16 and a resistor R17.
As shown in fig. 1, pin 12 of the magnetic sensor U1 is simultaneously connected to one end of the resistor R1 and pin 5 of the amplifier B1, pin 13 of the magnetic sensor U1 is simultaneously connected to one end of the resistor R2 and pin 6 of the amplifier B1, pin 15 of the magnetic sensor U1 is simultaneously connected to one end of the resistor R4 and pin 3 of the amplifier B2, pin 16 of the magnetic sensor U1 is simultaneously connected to one end of the resistor R6 and pin 2 of the amplifier B2, pin 4 of the amplifier B1 is connected to one end of the resistor R3, pin 7 of the amplifier B1 is simultaneously connected to the other end of the resistor R3 and one end of the capacitor C1, pin 4 of the amplifier B2 is connected to one end of the resistor R5, pin 1 of the amplifier B2 is simultaneously connected to the other end of the resistor R5 and one end of the capacitor C2, the No. 8 pin of the amplifier B2 is simultaneously connected with the anode of the diode D1 and one end of the resistor R7; the No. 6 pin of the converter U2 is connected with the other end of the capacitor C1, the No. 8 pin of the converter U2 is connected with the other end of the capacitor C2, and the No. 11 pin of the converter U2 is connected with the other end of the resistor R7; pin 6 and pin 11 of the memory U3 are connected to the capacitor C7, pin 18 of the magnetic sensor U1 is connected to one end of the crystal oscillator capacitor C6, the other end of the crystal oscillator capacitor C6 is connected to the gate of the fet a1 and the gate of the fet a2, the drain of the fet a1 is connected to one end of the capacitor C3 and one end of the resistor R8, the source of the fet a1 is connected to one end of the resistor R9 and one end of the capacitor C4, the source of the fet a2 is connected to the other end of the capacitor C4, the other end of the resistor R9 is connected to the other end of the resistor R8, pin 10 of the memory U3 and the anode of the diode D2, the anode of the diode D3 is connected to pin 10 of the memory U3, the cathode of the diode D3 is connected to pin 13 of the memory U3, one end of the capacitor C5 is connected with the No. 13 pin of the memory U3
As shown in fig. 2, pin 4 of the microprocessor U4 is connected to pin 1 of the crystal oscillator X1, pin 5 of the microprocessor U4 is connected to pin 2 of the crystal oscillator X1, pin 1 of the microprocessor U4 is connected to one end of the resistor R10 and pin 4 of the monitor chip U5, pin 5 of the monitor chip U5 is connected to the other end of the resistor R10, pin 8 and pin 9 of the microprocessor U4 are connected to pin 7 and pin 6 of the dual operational amplifier U6, pin 11 of the microprocessor U4 is connected to pin 5 of the dual operational amplifier U6 and the anode of the diode D7, pin 4 of the dual operational amplifier U6 is connected to one end of the capacitor C9, pin 2 and pin 3 of the dual operational amplifier U6 is connected to one end of the resistor R14, the base electrode of the triode Q3 is simultaneously connected with the other end of the capacitor C9 and the other end of the resistor R14, the collector electrode of the triode Q3 is simultaneously connected with the negative electrode of the diode D7 and one end of the capacitor C10, and the emitter electrode of the triode Q3 is connected with one end of the resistor R15; pin 13 of the microprocessor U4 is connected to one end of the resistor R11 and one end of the capacitor C8, the positive terminal of the diode D4 is connected to the other end of the resistor R11 and the other end of the capacitor C8, pin 2 of the microprocessor U4 is connected to the input terminal of the nand gate E1 and the input terminal of the nand gate E2, the output terminal of the nand gate E1 is connected to pin 1 of the photocoupler U7 and the negative terminal of the diode D5, the positive terminal of the diode D5 is connected to pin 2 of the photocoupler U7, the output terminal of the nand gate E2 is connected to pin 1 of the photocoupler U8 and the negative terminal of the diode D6, the positive terminal of the diode D6 is connected to pin 2 of the photocoupler U8, pin 4 of the photocoupler U7 is connected to one end of the resistor R12, the other end of the resistor R12 is connected with the base of the triode Q1, the No. 4 pin of the photoelectric coupler U8 is connected with one end of the resistor R13, the other end of the resistor R13 is connected with the base of the triode Q2, the emitter of the triode Q1 is simultaneously connected with the cathode of the diode D4, the anode of the diode D8, one end of the capacitor C11 and one end of the resistor R17, the emitter of the triode Q2 is simultaneously connected with the cathode of the diode D8 and one end of the resistor R16, and the other end of the resistor R16 is simultaneously connected with the other end of the capacitor C11 and the other end of the resistor R17.
The working principle is as follows: in the magnetic induction module, a magnetic sensor U1 is energized by a power supply, a Bluetooth sound box is connected with external equipment in a matching mode and wirelessly transmits signals, when the magnetic sensor U1 receives signals through a pin 4 and a pin 5, the signals are transmitted to an amplifier B1 and an amplifier B2, a resistor R1, a resistor R2, a resistor R4 and a resistor R6 are used for increasing impedance and preventing the current from being overlarge, meanwhile, the magnetic sensor U1 transmits signal data to a memory U3 through a pin 18, meanwhile, an amplifying circuit is formed by a field effect transistor A1, a resistor R8, a resistor R9, a capacitor C3 and a capacitor C4 to generate negative grid source voltage, and the grid of the field effect transistor A2 outputs the negative grid source voltage; in the processing module, a pin 4 and a pin 5 of a microprocessor U4 are connected with a crystal oscillator XI to provide a clock for a system to work, a triode Q1 and a triode Q2 receive signals, the photoelectric coupler U7 and the photoelectric coupler U8 perform signal conversion, a NAND gate E1 and a NAND gate E2 perform signal data calculation and transmit the signal data to the input end of a microcontroller U4, a dual operational amplifier U6 is matched with the triode Q3, a resistor R15 and a capacitor C10 to perform operation output, a monitoring chip U5 is matched with the microcontroller U4 and the resistor R10 to perform monitoring detection, and if the system has errors, resetting protection equipment can be automatically performed; meanwhile, the sound box adopts a Bluetooth 5.0 transmission technology, so that longer-distance transmission can be realized, and the anti-interference capability can be enhanced by matching with a magnetic sensor U1.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the details of the above embodiments, and the technical concept of the present invention can be modified to perform various equivalent transformations, which all belong to the protection scope of the present invention.

Claims (5)

1. A magnetic induction trigger circuit for a Bluetooth sound box is characterized by comprising a magnetic induction module for induction by a magnetic sensor, a processing module for receiving magnetic signals and processing the signals, a control circuit switch and a trigger control module controlled by a power supply; the magnetic induction module comprises a magnetic sensor U1, an amplifier B1, an amplifier B2, a converter U2, a memory U3, a field-effect tube A1, a field-effect tube A2, a diode D1, a diode D2, a diode D3, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a crystal oscillator capacitor C6, a capacitor C7 and an interface J1; pin 12 of the magnetic sensor U1 is simultaneously connected to one end of the resistor R1 and pin 5 of the amplifier B1, pin 13 of the magnetic sensor U1 is simultaneously connected to one end of the resistor R2 and pin 6 of the amplifier B1, pin 15 of the magnetic sensor U1 is simultaneously connected to one end of the resistor R4 and pin 3 of the amplifier B2, pin 16 of the magnetic sensor U1 is simultaneously connected to one end of the resistor R6 and pin 2 of the amplifier B2, pin 4 of the amplifier B1 is connected to one end of the resistor R3, pin 7 of the amplifier B1 is simultaneously connected to the other end of the resistor R3 and one end of the capacitor C1, pin 4 of the amplifier B2 is connected to one end of the resistor R5, pin 1 of the amplifier B2 is simultaneously connected to the other end of the resistor R5 and one end of the capacitor C2, the No. 8 pin of the amplifier B2 is simultaneously connected with the anode of the diode D1 and one end of the resistor R7; the No. 6 pin of the converter U2 is connected with the other end of the capacitor C1, the No. 8 pin of the converter U2 is connected with the other end of the capacitor C2, and the No. 11 pin of the converter U2 is connected with the other end of the resistor R7; pin 6 and pin 11 of the memory U3 are connected to the capacitor C7, pin 18 of the magnetic sensor U1 is connected to one end of the crystal oscillator capacitor C6, the other end of the crystal oscillator capacitor C6 is connected to the gate of the fet a1 and the gate of the fet a2, the drain of the fet a1 is connected to one end of the capacitor C3 and one end of the resistor R8, the source of the fet a1 is connected to one end of the resistor R9 and one end of the capacitor C4, the source of the fet a2 is connected to the other end of the capacitor C4, the other end of the resistor R9 is connected to the other end of the resistor R8, pin 10 of the memory U3 and the anode of the diode D2, the anode of the diode D3 is connected to pin 10 of the memory U3, the cathode of the diode D3 is connected to pin 13 of the memory U3, one end of the capacitor C5 is connected with the No. 13 pin of the memory U3.
2. The magnetic force sensing trigger circuit for the Bluetooth speaker as claimed in claim 1, wherein the magnetic sensor U1 is connected to the 6 th pin and the 9 th pin and grounded, the magnetic sensor U1 is connected to the 8 th pin and the 9 th pin, the magnetic sensor U1 is connected to the 3 rd pin and grounded, the converter U2 is connected to the 9 th pin and grounded, the converter U2 is connected to the 1 st pin and powered input terminal, the memory U3 is connected to the 4 th pin and grounded, and the memory U3 is connected to the 13 th pin and powered input terminal.
3. The magnetic force induction trigger circuit for the Bluetooth sound box is characterized in that the processing module comprises a microprocessor U4, a monitoring chip U5, a dual operational amplifier U6, a NAND gate E1, a NAND gate E2, a photoelectric coupler U7, a photoelectric coupler U8, a triode Q1, a triode Q2, a triode Q3, a diode D4, a diode D5, a diode D6, a diode D7, a diode D8, a crystal oscillator X1, a capacitor C8, a capacitor C9, a capacitor C10, a capacitor C11, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a resistor R16 and a resistor R17; wherein the pin 4 of the microprocessor U4 is connected with the pin 1 of the crystal oscillator X1, the pin 5 of the microprocessor U4 is connected with the pin 2 of the crystal oscillator X1, the pin 1 of the microprocessor U4 is simultaneously connected with one end of the resistor R10 and the pin 4 of the monitor chip U5, the pin 5 of the monitor chip U5 is connected with the other end of the resistor R10, the pin 8 and the pin 9 of the microprocessor U4 are respectively connected with the pin 7 and the pin 6 of the dual operational amplifier U6, the pin 11 of the microprocessor U4 is simultaneously connected with the pin 5 of the dual operational amplifier U6 and the anode of the diode D7, the pin 4 of the dual operational amplifier U6 is connected with one end of the capacitor C9, the pin 2 and the pin 3 of the dual operational amplifier U6 is connected with one end of the resistor R14, the base electrode of the triode Q3 is simultaneously connected with the other end of the capacitor C9 and the other end of the resistor R14, the collector electrode of the triode Q3 is simultaneously connected with the negative electrode of the diode D7 and one end of the capacitor C10, and the emitter electrode of the triode Q3 is connected with one end of the resistor R15; pin 13 of the microprocessor U4 is connected to one end of the resistor R11 and one end of the capacitor C8, the positive terminal of the diode D4 is connected to the other end of the resistor R11 and the other end of the capacitor C8, pin 2 of the microprocessor U4 is connected to the input terminal of the nand gate E1 and the input terminal of the nand gate E2, the output terminal of the nand gate E1 is connected to pin 1 of the photocoupler U7 and the negative terminal of the diode D5, the positive terminal of the diode D5 is connected to pin 2 of the photocoupler U7, the output terminal of the nand gate E2 is connected to pin 1 of the photocoupler U8 and the negative terminal of the diode D6, the positive terminal of the diode D6 is connected to pin 2 of the photocoupler U8, pin 4 of the photocoupler U7 is connected to one end of the resistor R12, the other end of the resistor R12 is connected with the base of the triode Q1, the No. 4 pin of the photoelectric coupler U8 is connected with one end of the resistor R13, the other end of the resistor R13 is connected with the base of the triode Q2, the emitter of the triode Q1 is simultaneously connected with the cathode of the diode D4, the anode of the diode D8, one end of the capacitor C11 and one end of the resistor R17, the emitter of the triode Q2 is simultaneously connected with the cathode of the diode D8 and one end of the resistor R16, and the other end of the resistor R16 is simultaneously connected with the other end of the capacitor C11 and the other end of the resistor R17.
4. The magnetic force sensing trigger circuit for a Bluetooth speaker as claimed in claim 3, wherein pin 3 of the microprocessor U4 is grounded, pin 8 of the monitor chip U5 is grounded, pin 6 of the monitor chip U5 is connected to a power supply, pin 1 of the dual operational amplifier U6 is grounded, and pin 8 of the dual operational amplifier U6 is connected to a power supply.
5. The magnetic force sensing trigger circuit for the Bluetooth speaker as claimed in claim 1, wherein the processing module is provided with a transmitter S1, the pin No. 6 of the transmitter S1 is connected to the pin No. 14 of the microprocessor U4, and the transmitter transmits a signal to the trigger control module for control output.
CN201921865236.6U 2019-11-01 2019-11-01 Magnetic induction trigger circuit for Bluetooth sound box Active CN210629752U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921865236.6U CN210629752U (en) 2019-11-01 2019-11-01 Magnetic induction trigger circuit for Bluetooth sound box

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921865236.6U CN210629752U (en) 2019-11-01 2019-11-01 Magnetic induction trigger circuit for Bluetooth sound box

Publications (1)

Publication Number Publication Date
CN210629752U true CN210629752U (en) 2020-05-26

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