CN212413478U - Control circuit for EMS - Google Patents
Control circuit for EMS Download PDFInfo
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- CN212413478U CN212413478U CN202021558858.7U CN202021558858U CN212413478U CN 212413478 U CN212413478 U CN 212413478U CN 202021558858 U CN202021558858 U CN 202021558858U CN 212413478 U CN212413478 U CN 212413478U
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Abstract
The utility model discloses a control circuit for EMS, including MCU microprocessor, LED pilot lamp control circuit, button detection circuitry, battery voltage acquisition circuit, EMS output control circuit, battery charging management circuit, the linear steady voltage LDO of low dropout and battery. The MCU microprocessor U1 is respectively connected with an LED indicator lamp control circuit, a key detection circuit, a battery voltage acquisition circuit and an EMS output control circuit through an I/O port, and the LED indicator lamp control circuit provides a system running state and an EMS output intensity state; the key detection circuit can realize system startup and shutdown and gear adjustment through external key input; the battery voltage acquisition circuit can acquire the current electric quantity of the battery, and when the electric quantity of the battery is low, a user is prompted to charge; the EMS output control circuit outputs an electric signal with a certain frequency, is connected to the metal electrode and acts on the skin through the metal electrode. The utility model discloses a control circuit integrated nature is higher, selects for use components and parts less, connects simplely, and the interference killing feature is stronger.
Description
Technical Field
The utility model belongs to the technical field of circuit control, in particular to a control circuit for EMS.
Background
At present, an EMS (micro-current) technology applied to a household beauty instrument realizes a voltage boosting mode for a DC-DC boosting IC circuit, and the boosted voltage is high, and has more peripheral components and more complex circuit connection.
Disclosure of Invention
An object of the utility model is to provide a control circuit for EMS to solve above-mentioned problem.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a control circuit for EMS comprises an MCU microprocessor, a key detection circuit, a battery voltage acquisition circuit, an EMS output control circuit, a low dropout linear regulator LDO and a battery; the key detection circuit, the battery voltage acquisition circuit, the EMS output control circuit and the low-dropout linear voltage regulator LDO are all connected to the MCU microprocessor, and the battery is connected to the low-dropout linear voltage regulator LDO;
the EMS output control circuit is connected with the MCU through an I/O port; the EMS output control circuit comprises a resistor R10, a resistor R11, a resistor R14, a resistor R18, a resistor R19, a resistor R20, a resistor R21, a resistor R22, an NPN triode Q3, an NPN triode Q5, an NPN triode Q7, an NPN triode Q8, a PNP triode Q1, a PNP triode Q6 and a connecting terminal P2; the resistor R14 is connected with the base electrode of the NPN triode Q3, and the emitting electrode of the NPN triode Q3 is grounded; the resistor R18 is connected with the base electrode of the NPN triode Q5, and the emitting electrode of the NPN triode Q5 is grounded; the resistor R21 is connected with the base electrode of the NPN triode Q7, and the emitting electrode of the NPN triode Q7 is grounded; the resistor R22 is connected with the base electrode of the NPN triode Q8, and the emitting electrode of the NPN triode Q8 is grounded; a collector of the NPN triode Q3 is connected with one end of the resistor R10 and one end of the resistor R11, the other end of the resistor R10 is connected with a base electrode of the PNP triode Q1, and the other end of the resistor R11 is connected with a power supply VCC; a collector of the NPN triode Q7 is connected with one end of the resistor R19 and one end of the resistor R20, the other end of the resistor R19 is connected with a base electrode of the PNP triode Q6, and the other end of the resistor R11 is connected with a power supply VCC; the NPN triode Q5 and the PNP triode Q6 are connected with the 1 st pin of the connecting terminal P2; the NPN triode Q8 and the PNP triode Q1 are connected with the 2 nd pin of the connecting terminal P2; the other end of the resistor R14 and the other end of the resistor R18 are connected to an I/O port of the MCU; the other end of the resistor R21 and the other end of the resistor R22 are connected to an I/O port of the MCU; the connecting terminal is connected with the two metal electrodes.
Further, the key detection circuit is connected with the MCU through an I/O port; the key detection circuit comprises a resistor R2, a resistor R6, a capacitor C3 and a light touch switch SW 1; one end of the tact switch SW1 is grounded; the other end of the resistor R10 and one end of the capacitor C3 are connected with the I/O of the MCU, the other end of the resistor R2 is connected with the power supply VDD, the other end of the capacitor C3 is connected with the resistor R6, and the other end of the resistor R6 is grounded.
Further, the battery voltage acquisition circuit is connected with the MCU through an I/O port; the battery voltage acquisition circuit comprises a resistor R12, a resistor R13, a resistor R15, a resistor R16, a resistor R17, a capacitor C11, an NPN triode Q4 and a PMOS tube Q2; the source electrode of the PMOS tube Q2 is connected with one end of the R10 and then connected to the positive electrode of the battery; the grid electrode of the PMOS transistor Q2 is connected with the collector electrode of an NPN triode Q4; the base electrode of the NPN triode Q4 is connected with the resistor R15 and the resistor R17, the other end of the resistor R15 is connected with an I/O port of the MCU, and the emitter electrode of the NPN triode Q4 is grounded with the other end of the resistor R17; the drain electrode of the PMOS tube Q2 is connected with a resistor R13, the other end of the resistor R13 is connected with a resistor R16 and a capacitor C11, and the other ends of the resistor R16 and the capacitor C11 are grounded.
Further, the MCU microprocessor is also connected with an LED indicator lamp control circuit through an I/O port; the LED indicator lamp control circuit comprises a resistor R1, a resistor R4, a resistor R5, a light emitting diode LED1, a light emitting diode LED2 and a light emitting diode LED 3; the resistor R1 is connected in series with the light emitting diode LED1, the resistor R4 is connected in series with the light emitting diode LED2, and the resistor R5 is connected in series with the light emitting diode LED 3.
Further, the battery is connected with a battery charging management circuit, and the battery charging management circuit comprises a resistor R8, a resistor R9, a capacitor C1, a capacitor C2, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, an inductor L1, a Schottky diode D1, a TVS tube D2, a two-color light-emitting diode LED4, a micro USB socket USB1, a battery charging management chip U1 and a connecting terminal P1; the positive and negative electrodes of the battery are connected with a connecting terminal P1; the capacitor C1 is connected with the capacitor C2 in parallel, one end of the capacitor C1 is connected with VCC, and the other end of the capacitor C2 is grounded; the capacitor C5, the capacitor C6, the capacitor C7 and the TVS tube D2 are connected in parallel, one end of the TVS tube is connected with the anode of the battery, and the other end of the TVS tube is grounded; the inductor L1 is connected in series with the Schottky diode D1; the positive electrode of the Schottky diode D1 is connected with the 8 th pin of the battery charging management chip U1, and the negative electrode of the Schottky diode D1 is connected with the 1 st pin of the battery charging management chip U1; one end of the resistor R8 is grounded, and the other end is connected with the 3 rd pin of the battery charging management chip U1; the 2 nd pin and the 4 th pin of the battery charging management chip U1 are connected with the cathode of a double-color light-emitting diode LED4, the anode of the double-color light-emitting diode LED4 is connected with one end of a resistor R9, the other end of the resistor R9 is connected with the anode of a micro USB socket USB1, and the cathode of the micro USB socket USB1 is grounded; the capacitor C8 is connected with the micro USB socket USB1 in parallel; the positive pole of the battery is connected with the 1 st pin of the connecting terminal P1, and the negative pole of the battery is connected with the 2 nd pin of the connecting terminal P1.
Further, the model of the MCU microprocessor is STM8L151K6T 6/ST.
Compared with the prior art, the invention has the following technical effects:
the MCU microprocessor U1 is respectively connected with an LED indicator lamp control circuit, a key detection circuit, a battery voltage acquisition circuit and an EMS output control circuit through an I/O port, and the LED indicator lamp control circuit provides a system running state and an EMS output intensity state; the key detection circuit can realize system startup and shutdown and gear adjustment through external key input; the battery voltage acquisition circuit can acquire the current electric quantity of the battery, and when the electric quantity of the battery is low, a user is prompted to charge; the EMS output control circuit outputs an electric signal with a certain frequency, is connected to the metal electrode and acts on the skin through the metal electrode. The utility model discloses a control circuit integrated nature is higher, selects for use components and parts less, connects simplely, and the interference killing feature is stronger.
Drawings
Fig. 1 is a block diagram of a control circuit for an EMS according to the present invention;
fig. 2 is a schematic structural diagram of an LED indicator lamp control circuit in a control circuit for EMS according to the present invention;
fig. 3 is a schematic structural diagram of a key detection circuit in a control circuit for EMS according to the present invention;
fig. 4 is a schematic structural diagram of a battery voltage acquisition circuit in a control circuit for EMS according to the present invention;
fig. 5 is a schematic structural diagram of an EMS output control circuit in a control circuit for an EMS according to the present invention;
fig. 6 is a schematic structural diagram of a battery charging management circuit in a control circuit for EMS according to the present invention;
Detailed Description
The present invention will be further explained with reference to the accompanying drawings:
referring to fig. 1 to 6, a control circuit for EMS includes an MCU microprocessor, an LED indicator lamp control circuit, a key detection circuit, a battery voltage acquisition circuit, an EMS output control circuit, a battery charging management circuit, a low dropout linear regulator LDO, and a battery; LED pilot lamp control circuit, button detection circuitry, battery voltage acquisition circuit, EMS output control circuit and the linear steady voltage LDO of low dropout all are connected to MCU microprocessor, and the linear steady voltage LDO of low dropout connects the battery, and charge management circuit is connected to the battery.
The MCU microprocessor is connected with the LED indicator lamp control circuit through the I/O port; the LED indicator lamp control circuit comprises a resistor R1, a resistor R4, a resistor R5, a light emitting diode LED1, a light emitting diode LED2 and a light emitting diode LED 3; the resistor R1 is connected with the light emitting diode LED1 in series, the resistor R4 is connected with the light emitting diode LED2 in series, the resistor R5 is connected with the light emitting diode LED3 in series, the other ends of the resistor R1, the resistor R4 and the resistor R5 are connected to an I/O port of the MCU microprocessor respectively, and the MCU microprocessor can control the on and off of the light emitting diode LED1, the light emitting diode LED2 and the light emitting diode LED3, so that the running state of a user system is prompted.
The MCU microprocessor is connected with the key detection circuit through the I/O port; the key detection circuit comprises a resistor R2, a resistor R6, a capacitor C3 and a light touch switch SW 1; one end of the tact switch SW1 is grounded; the other end of the resistor R10 and one end of the capacitor C3 are connected with the I/O of the MCU, the other end of the resistor R2 is connected with the power supply VDD, the other end of the capacitor C3 is connected with the resistor R6, and the other end of the resistor R6 is grounded. The tact switch SW1 controls the on/off of the system and the gear adjustment of the system.
The MCU microprocessor is connected with a battery voltage acquisition circuit through an I/O port, and the battery voltage acquisition circuit comprises a resistor R12, a resistor R13, a resistor R15, a resistor R16, a resistor R17, a capacitor C11, an NPN triode Q4 and a PMOS tube Q2; the source electrode of the PMOS tube Q2 is connected with one end of the R10 and then connected to the positive electrode of the battery; the grid electrode of the PMOS transistor Q2 is connected with the collector electrode of an NPN triode Q4; the base electrode of the NPN triode Q4 is connected with the resistor R15 and the resistor R17, the other end of the resistor R15 is connected with an I/O port of the MCU, and the emitter electrode of the NPN triode Q4 is grounded with the other end of the resistor R17; the drain electrode of the PMOS tube Q2 is connected with a resistor R13, the other end of the resistor R13 is connected with a resistor R16 and a capacitor C11, and the other ends of the resistor R16 and the capacitor C11 are grounded. Thereby through the switch-on of MCU's IO mouth control triode collecting electrode with end the battery voltage who drives the PMOS pipe and open and close, when battery voltage opened, gather the voltage after two resistance partial pressures through MCU's AD acquisition mouth, calculate the electric quantity of current battery, when system battery electric quantity is low, the suggestion user charges.
The MCU microprocessor is connected with the EMS output control circuit through an I/O port; the EMS output control circuit comprises a resistor R10, a resistor R11, a resistor R14, a resistor R18, a resistor R19, a resistor R20, a resistor R21, a resistor R22, an NPN triode Q3, an NPN triode Q5, an NPN triode Q7, an NPN triode Q8, a PNP triode Q1, a PNP triode Q6 and a connecting terminal P2; the resistor R14 is connected with the base electrode of the NPN triode Q3, and the emitting electrode of the NPN triode Q3 is grounded; the resistor R18 is connected with the base electrode of the NPN triode Q5, and the emitting electrode of the NPN triode Q5 is grounded; the resistor R21 is connected with the base electrode of the NPN triode Q7, and the emitting electrode of the NPN triode Q7 is grounded; the resistor R22 is connected with the base electrode of the NPN triode Q8, and the emitting electrode of the NPN triode Q8 is grounded; a collector of the NPN triode Q3 is connected with one end of the resistor R10 and one end of the resistor R11, the other end of the resistor R10 is connected with a base electrode of the PNP triode Q1, and the other end of the resistor R11 is connected with a power supply VCC; a collector of the NPN triode Q7 is connected with one end of the resistor R19 and one end of the resistor R20, the other end of the resistor R19 is connected with a base electrode of the PNP triode Q6, and the other end of the resistor R11 is connected with a power supply VCC; the NPN triode Q5 and the PNP triode Q6 are connected with the 1 st pin of the connecting terminal P2; the NPN triode Q8 and the PNP triode Q1 are connected with the 2 nd pin of the connecting terminal P2; the other end of the resistor R14 and the other end of the resistor R18 are connected to an I/O port of the MCU; the other end of the resistor R21 and the other end of the resistor R22 are connected to an I/O port of the MCU; two ends of the wiring terminal are connected with two metal electrodes, and a variable electric signal can be generated on the metal electrodes by controlling two I/O ports of the MCU to output PWM signals with certain frequency.
One end of the battery charging management circuit is a 5V input of the charger, and the other end of the battery charging management circuit is connected with the anode and the cathode of the battery; the battery charging management circuit comprises a resistor R8, a resistor R9, a capacitor C1, a capacitor C2, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, an inductor L1, a Schottky diode D1, a TVS tube D2, a bicolor light-emitting diode LED4, a micro USB socket USB1, a battery charging management chip U1 and a connecting terminal P1. The capacitor C1 is connected with the capacitor C2 in parallel, one end of the capacitor C1 is connected with VCC, and the other end of the capacitor C2 is grounded; the capacitor C5, the capacitor C6, the capacitor C7 and the TVS tube D2 are connected in parallel, one end of the TVS tube is connected with the anode of the battery, and the other end of the TVS tube is grounded; the inductor L1 is connected in series with the Schottky diode D1; the positive electrode of the Schottky diode D1 is connected with the 8 th pin of the battery charging management chip U1, and the negative electrode of the Schottky diode D1 is connected with the 1 st pin of the battery charging management chip U1; one end of the resistor R8 is grounded, and the other end is connected with the 3 rd pin of the battery charging management chip U1; the 2 nd pin and the 4 th pin of the battery charging management chip U1 are connected with the cathode of a double-color light-emitting diode LED4, the anode of the double-color light-emitting diode LED4 is connected with one end of a resistor R9, the other end of the resistor R9 is connected with the anode of a micro USB socket USB1, and the cathode of the micro USB socket USB1 is grounded; the capacitor C8 is connected with the micro USB socket USB1 in parallel; the positive pole of the battery is connected with the 1 st pin of the connecting terminal P1, and the negative pole of the battery is connected with the 2 nd pin of the connecting terminal P1. The battery can be charged by connecting the micro USB socket USB1 with a power adapter.
The MCU microprocessor is STM8L151K6T 6/ST.
The MCU microprocessor U1 is connected with the LED indicator lamp control circuit through the I/O port, and the MCU microprocessor U1 can control the on and off of the LED indicator lamp to indicate the current state of the system;
the MCU microprocessor U1 is connected with the key detection circuit through the I/O port, the pressing and the loosening of the key can be judged by detecting the high and low level state of the I/O port, and the key can control the on-off and the output gear adjustment of the system;
the MCU microprocessor U1 is connected with the battery voltage acquisition circuit through an I/O port, and can acquire the current voltage of the battery through an AD acquisition port of the MCU, thereby judging the low electric quantity of the battery and prompting a user;
the MCU microprocessor U1 is connected with an EMS output control circuit through an I/O port, and controls the metal electrode to output an electric signal with a certain frequency by changing the PWM signal with a certain frequency output by the I/O port;
one end of the battery charging management circuit is a 5V input of the charger, and the other end of the battery charging management circuit is connected with the anode and the cathode of the battery;
the MCU microprocessor U1 is STM8L151K6T 6/ST.
The battery power supply is subjected to low dropout linear regulator (LDO) voltage reduction and then provides power input for the MCU;
referring to fig. 1, the present invention provides a control circuit for EMS, including: the device comprises an MCU microprocessor, an LED indicator lamp control circuit, a key detection circuit, a battery voltage acquisition circuit, an EMS output control circuit, a battery charging management circuit, a low dropout linear voltage regulator LDO and a battery; LED pilot lamp control circuit, button detection circuitry, battery voltage acquisition circuit, EMS output control circuit and the linear steady voltage LDO of low dropout all are connected to MCU microprocessor, and the linear steady voltage LDO of low dropout connects the battery, and charge management circuit is connected to the battery. The MCU microprocessor U1 is STM8L151K6T 6/ST.
Referring to fig. 2, the LED indicator lamp control circuit includes a resistor R1, a resistor R2, a resistor R3, and a light emitting diode LED1, a light emitting diode LED2, a light emitting diode LED 3; the resistor R1 is connected in series with the light emitting diode LED1, the resistor R2 is connected in series with the light emitting diode LED2, and the resistor R3 is connected in series with the light emitting diode LED 3. The indicator light control circuit is used for realizing the indication of the system state.
Referring to fig. 3, the MCU microprocessor is connected to a battery voltage acquisition circuit via an I/O port, the battery voltage acquisition circuit includes a resistor R12, a resistor R13, a resistor R15, a resistor R16, a resistor R17, a capacitor C11, an NPN transistor Q4, and a PMOS transistor Q2; the source electrode of the PMOS tube Q2 is connected with one end of the R10 and then connected to the positive electrode of the battery; the grid electrode of the PMOS transistor Q2 is connected with the collector electrode of an NPN triode Q4; the base electrode of the NPN triode Q4 is connected with the resistor R15 and the resistor R17, the other end of the resistor R15 is connected with an I/O port of the MCU, and the emitter electrode of the NPN triode Q4 is grounded with the other end of the resistor R17; the drain electrode of the PMOS tube Q2 is connected with a resistor R13, the other end of the resistor R13 is connected with a resistor R16 and a capacitor C11, and the other ends of the resistor R16 and the capacitor C11 are grounded. Thereby through the switch-on of MCU's IO mouth control triode collecting electrode with end the battery voltage who drives the PMOS pipe and open and close, when battery voltage opened, gather the voltage after two resistance partial pressures through MCU's AD acquisition mouth, calculate the electric quantity of current battery, when system battery electric quantity is low, the suggestion user charges.
Referring to fig. 4, the MCU microprocessor is connected to the EMS output control circuit through an I/O port; the EMS output control circuit comprises a resistor R10, a resistor R11, a resistor R14, a resistor R18, a resistor R19, a resistor R20, a resistor R21, a resistor R22, an NPN triode Q3, an NPN triode Q5, an NPN triode Q7, an NPN triode Q8, a PNP triode Q1, a PNP triode Q6 and a connecting terminal P2; the resistor R14 is connected with the base electrode of the NPN triode Q3, and the emitting electrode of the NPN triode Q3 is grounded; the resistor R18 is connected with the base electrode of the NPN triode Q5, and the emitting electrode of the NPN triode Q5 is grounded; the resistor R21 is connected with the base electrode of the NPN triode Q7, and the emitting electrode of the NPN triode Q7 is grounded; the resistor R22 is connected with the base electrode of the NPN triode Q8, and the emitting electrode of the NPN triode Q8 is grounded; a collector of the NPN triode Q3 is connected with one end of the resistor R10 and one end of the resistor R11, the other end of the resistor R10 is connected with a base electrode of the PNP triode Q1, and the other end of the resistor R11 is connected with a power supply VCC; a collector of the NPN triode Q7 is connected with one end of the resistor R19 and one end of the resistor R20, the other end of the resistor R19 is connected with a base electrode of the PNP triode Q6, and the other end of the resistor R11 is connected with a power supply VCC; the NPN triode Q5 and the PNP triode Q6 are connected with the 1 st pin of the connecting terminal P2; the NPN triode Q8 and the PNP triode Q1 are connected with the 2 nd pin of the connecting terminal P2; the other end of the resistor R14 and the other end of the resistor R18 are connected to an I/O port of the MCU; the other end of the resistor R21 and the other end of the resistor R22 are connected to an I/O port of the MCU; two ends of the wiring terminal are connected with two metal electrodes, and a variable electric signal can be generated on the metal electrodes by controlling two I/O ports of the MCU to output PWM signals with certain frequency.
Referring to fig. 5, the output control circuit includes R28, a resistor R36, an opto-solid relay U7, and an opto-solid relay U9. The 1 st pins of the photoelectric solid-state relays U7 and U9 are connected to an I/O port of the MCU microprocessor U1, the 3 rd pins of the photoelectric solid-state relays U7 and U9 are connected to output terminals, and the voltage of each output terminal can be controlled to be turned on and off by controlling the high and low level of each I/O port through a program.
Referring to fig. 6, one end of the battery charging management circuit is the 5V input of the charger, and the other end is connected to the positive and negative electrodes of the battery; the battery charging management circuit comprises a resistor R8, a resistor R9, a capacitor C1, a capacitor C2, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, an inductor L1, a Schottky diode D1, a TVS tube D2, a bicolor light-emitting diode LED4, a micro USB socket USB1, a battery charging management chip U1 and a connecting terminal P1. The capacitor C1 is connected with the capacitor C2 in parallel, one end of the capacitor C1 is connected with VCC, and the other end of the capacitor C2 is grounded; the capacitor C5, the capacitor C6, the capacitor C7 and the TVS tube D2 are connected in parallel, one end of the TVS tube is connected with the anode of the battery, and the other end of the TVS tube is grounded; the inductor L1 is connected in series with the Schottky diode D1; the positive electrode of the Schottky diode D1 is connected with the 8 th pin of the battery charging management chip U1, and the negative electrode of the Schottky diode D1 is connected with the 1 st pin of the battery charging management chip U1; one end of the resistor R8 is grounded, and the other end is connected with the 3 rd pin of the battery charging management chip U1; the 2 nd pin and the 4 th pin of the battery charging management chip U1 are connected with the cathode of a double-color light-emitting diode LED4, the anode of the double-color light-emitting diode LED4 is connected with one end of a resistor R9, the other end of the resistor R9 is connected with the anode of a micro USB socket USB1, and the cathode of the micro USB socket USB1 is grounded; the capacitor C8 is connected with the micro USB socket USB1 in parallel; the positive pole of the battery is connected with the 1 st pin of the connecting terminal P1, and the negative pole of the battery is connected with the 2 nd pin of the connecting terminal P1. The battery can be charged by connecting the micro USB socket USB1 with a power adapter.
Claims (6)
1. A control circuit for EMS is characterized by comprising an MCU microprocessor, a key detection circuit, a battery voltage acquisition circuit, an EMS output control circuit, a low dropout linear regulator LDO and a battery; the key detection circuit, the battery voltage acquisition circuit, the EMS output control circuit and the low-dropout linear voltage regulator LDO are all connected to the MCU microprocessor, and the battery is connected to the low-dropout linear voltage regulator LDO;
the EMS output control circuit is connected with the MCU through an I/O port; the EMS output control circuit comprises a resistor R10, a resistor R11, a resistor R14, a resistor R18, a resistor R19, a resistor R20, a resistor R21, a resistor R22, an NPN triode Q3, an NPN triode Q5, an NPN triode Q7, an NPN triode Q8, a PNP triode Q1, a PNP triode Q6 and a connecting terminal P2; the resistor R14 is connected with the base electrode of the NPN triode Q3, and the emitting electrode of the NPN triode Q3 is grounded; the resistor R18 is connected with the base electrode of the NPN triode Q5, and the emitting electrode of the NPN triode Q5 is grounded; the resistor R21 is connected with the base electrode of the NPN triode Q7, and the emitting electrode of the NPN triode Q7 is grounded; the resistor R22 is connected with the base electrode of the NPN triode Q8, and the emitting electrode of the NPN triode Q8 is grounded; a collector of the NPN triode Q3 is connected with one end of the resistor R10 and one end of the resistor R11, the other end of the resistor R10 is connected with a base electrode of the PNP triode Q1, and the other end of the resistor R11 is connected with a power supply VCC; a collector of the NPN triode Q7 is connected with one end of the resistor R19 and one end of the resistor R20, the other end of the resistor R19 is connected with a base electrode of the PNP triode Q6, and the other end of the resistor R11 is connected with a power supply VCC; the NPN triode Q5 and the PNP triode Q6 are connected with the 1 st pin of the connecting terminal P2; the NPN triode Q8 and the PNP triode Q1 are connected with the 2 nd pin of the connecting terminal P2; the other end of the resistor R14 and the other end of the resistor R18 are connected to an I/O port of the MCU; the other end of the resistor R21 and the other end of the resistor R22 are connected to an I/O port of the MCU; the connecting terminal is connected with the two metal electrodes.
2. The control circuit for an EMS according to claim 1, wherein the key detection circuit is connected to the MCU microprocessor through an I/O port; the key detection circuit comprises a resistor R2, a resistor R6, a capacitor C3 and a light touch switch SW 1; one end of the tact switch SW1 is grounded; the other end of the resistor R10 and one end of the capacitor C3 are connected with the I/O of the MCU, the other end of the resistor R2 is connected with the power supply VDD, the other end of the capacitor C3 is connected with the resistor R6, and the other end of the resistor R6 is grounded.
3. The control circuit for an EMS of claim 1, wherein the battery voltage collecting circuit is connected with the MCU microprocessor through an I/O port; the battery voltage acquisition circuit comprises a resistor R12, a resistor R13, a resistor R15, a resistor R16, a resistor R17, a capacitor C11, an NPN triode Q4 and a PMOS tube Q2; the source electrode of the PMOS tube Q2 is connected with one end of the R10 and then connected to the positive electrode of the battery; the grid electrode of the PMOS transistor Q2 is connected with the collector electrode of an NPN triode Q4; the base electrode of the NPN triode Q4 is connected with the resistor R15 and the resistor R17, the other end of the resistor R15 is connected with an I/O port of the MCU, and the emitter electrode of the NPN triode Q4 is grounded with the other end of the resistor R17; the drain electrode of the PMOS tube Q2 is connected with a resistor R13, the other end of the resistor R13 is connected with a resistor R16 and a capacitor C11, and the other ends of the resistor R16 and the capacitor C11 are grounded.
4. The control circuit for the EMS according to claim 1, wherein the MCU microprocessor is further connected with an LED indicator lamp control circuit through an I/O port; the LED indicator lamp control circuit comprises a resistor R1, a resistor R4, a resistor R5, a light emitting diode LED1, a light emitting diode LED2 and a light emitting diode LED 3; the resistor R1 is connected in series with the light emitting diode LED1, the resistor R4 is connected in series with the light emitting diode LED2, and the resistor R5 is connected in series with the light emitting diode LED 3.
5. The control circuit for EMS according to claim 1, wherein the battery is connected with a battery charging management circuit, the battery charging management circuit comprises a resistor R8, a resistor R9, a capacitor C1, a capacitor C2, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, an inductor L1, a Schottky diode D1, a TVS tube D2, a bicolor LED4, a micro USB socket USB1, a battery charging management chip U1 and a connecting terminal P1; the positive and negative electrodes of the battery are connected with a connecting terminal P1; the capacitor C1 is connected with the capacitor C2 in parallel, one end of the capacitor C1 is connected with VCC, and the other end of the capacitor C2 is grounded; the capacitor C5, the capacitor C6, the capacitor C7 and the TVS tube D2 are connected in parallel, one end of the TVS tube is connected with the anode of the battery, and the other end of the TVS tube is grounded; the inductor L1 is connected in series with the Schottky diode D1; the positive electrode of the Schottky diode D1 is connected with the 8 th pin of the battery charging management chip U1, and the negative electrode of the Schottky diode D1 is connected with the 1 st pin of the battery charging management chip U1; one end of the resistor R8 is grounded, and the other end is connected with the 3 rd pin of the battery charging management chip U1; the 2 nd pin and the 4 th pin of the battery charging management chip U1 are connected with the cathode of a double-color light-emitting diode LED4, the anode of the double-color light-emitting diode LED4 is connected with one end of a resistor R9, the other end of the resistor R9 is connected with the anode of a micro USB socket USB1, and the cathode of the micro USB socket USB1 is grounded; the capacitor C8 is connected with the micro USB socket USB1 in parallel; the positive pole of the battery is connected with the 1 st pin of the connecting terminal P1, and the negative pole of the battery is connected with the 2 nd pin of the connecting terminal P1.
6. A control circuit for EMS according to claim 1, wherein the MCU microprocessor is of the model STM8L151K6T 6/ST.
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| CN202021558858.7U CN212413478U (en) | 2020-07-30 | 2020-07-30 | Control circuit for EMS |
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| CN202021558858.7U CN212413478U (en) | 2020-07-30 | 2020-07-30 | Control circuit for EMS |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115192906A (en) * | 2022-07-14 | 2022-10-18 | 珠海荣源电子科技有限公司 | Control circuit of bluetooth massage appearance |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115192906A (en) * | 2022-07-14 | 2022-10-18 | 珠海荣源电子科技有限公司 | Control circuit of bluetooth massage appearance |
| CN115192906B (en) * | 2022-07-14 | 2023-03-10 | 珠海荣源电子科技有限公司 | Control circuit of bluetooth massage appearance |
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Address after: Room 617-620, Building 5, No. 2 Science Park Road, Baiyang Street, Qiantang District, Hangzhou City, Zhejiang Province, 310018 Patentee after: Hangzhou Time Machine Intelligent Electronic Technology Co.,Ltd. Address before: 710000 604, block a, Xi'an photoelectric Park, Yanta District, Xi'an City, Shaanxi Province Patentee before: Hangzhou Time Machine Intelligent Electronic Technology Co.,Ltd. |