Electric vehicle alarm with intelligent lighting control function

Abstract

The utility model discloses an electric vehicle alarm with an intelligent lighting control function, and relates to the technical field of electronic circuits, the electric vehicle alarm comprises an MCU, a human body infrared acquisition circuit and a light control circuit, the human body infrared acquisition circuit comprises an input module and a signal amplification module, the input module is connected with a human body detection sensor, and the signal amplification module is connected with the signal amplification module. The signal amplification module is connected with the MCU; the input module is used for receiving a sensing signal output by a human body detection sensor, and the signal amplification module is used for amplifying the sensing signal and transmitting the sensing signal to the MCU; and the MCU is used for controlling the working state of the auxiliary lamp through the light control circuit according to the amplified sensing signal. When an electric vehicle user gets close to the electric vehicle, the alarm can control the external auxiliary lamp to be automatically turned on through the internal light control circuit, the lighting conditions in a charging port, a key port and a seat barrel are improved, and therefore the use efficiency and convenience of the electric vehicle are improved, and the use experience of the user is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic circuits, in particular to an electric vehicle alarm with an intelligent lighting control function. Background Art

[0002] Traditional two-wheeled electric vehicles lack auxiliary lighting systems. When the vehicle is parked in a dim environment, it will cause many inconveniences to the user, affecting the user experience of the electric vehicle. For example: (1) When the vehicle needs to be charged, it is difficult to find the charging port accurately, making it inconvenient to charge. (2) When the vehicle needs to be started, it is difficult to see the keyhole clearly, making it difficult to insert the key accurately to start the vehicle. (3) After opening the seat bucket (the storage bucket under the electric vehicle seat), it is difficult to see the items needed. Utility Model Content

[0003] In response to the above problems and technical requirements, the applicant has proposed an electric vehicle alarm with intelligent lighting control function.

[0004] The technical solution of the utility model is as follows:

[0005] The utility model provides an electric vehicle alarm with intelligent lighting control function, including MCU, human infrared acquisition circuit and lighting control circuit, wherein:

[0006] The human body infrared acquisition circuit includes an input module and a signal amplification module connected to each other, the input module is connected to the human body detection sensor, and the signal amplification module is connected to the MCU;

[0007] The input module is used to receive the sensing signal output by the human body detection sensor, and the signal amplification module is used to amplify the sensing signal and transmit it to the MCU;

[0008] The light control circuit is connected to the auxiliary lamp and the MCU, and the MCU is used to control the working state of the auxiliary lamp through the light control circuit according to the amplified sensor signal.

[0009] A further technical solution is that the input module includes a resistor R14, a resistor R17 and a capacitor C24;

[0010] The signal output pin of the human body detection sensor is grounded through the capacitor C24, one end of the resistor R17 is connected to the signal output pin of the human body detection sensor, one end of the capacitor C24, and one end of the resistor R14, the other end of the resistor R17 is grounded, and the other end of the resistor R14 is connected to the signal amplification module.

[0011] A further technical solution is that the signal amplification module includes a first-stage amplification unit, which includes an operational amplifier U1, a resistor R9, a resistor R12, a diode D1, a capacitor C11, a capacitor C18 and a capacitor C28, wherein:

[0012] The non-inverting input terminal of the operational amplifier U1 is connected to one end of the resistor R14, the inverting input terminal of the operational amplifier U1 is connected to the cathode of the diode D1, the cathode of the diode D1 is connected to one end of the resistor R12 and one end of the resistor R9, the other end of the resistor R12 is grounded via the capacitor C11, the other end of the resistor R9 is connected to the anode of the diode D1, the anode of the diode D1 is connected to the output terminal of the operational amplifier U1, and the capacitor C18 is connected in parallel with the resistor R9;

[0013] The power supply terminal of the operational amplifier U1 is grounded through the capacitor C28 and connected to the first power supply voltage. The ground terminal of the operational amplifier U1 is also grounded.

[0014] A further technical solution is that the signal amplification module further includes a DC isolation filter unit, and the DC isolation filter unit includes a capacitor C21, a capacitor C23 and a resistor R18, wherein:

[0015] The output end of the operational amplifier U1 is grounded via a capacitor C23 and connected to one end of a resistor R18 via a capacitor C21 . The other end of the resistor R18 is grounded.

[0016] A further technical solution is that the signal amplification module further includes a second-stage amplification unit, which includes an operational amplifier U2, a resistor R10, a resistor R13, a resistor R15, a resistor R16, a resistor R20, a capacitor C17, a capacitor C22, a capacitor C27 and a capacitor C29, wherein,

[0017] One end of the resistor R13 is connected to one end of the resistor R18 via the capacitor C22, the other end of the resistor R13 is connected to the inverting input terminal of the operational amplifier U2, the inverting input terminal of the operational amplifier U2 is connected to the output terminal of the operational amplifier U2 via the resistor R10, and the capacitor C17 is connected in parallel with the resistor R10;

[0018] The non-inverting input terminal of the operational amplifier U2 is grounded through a resistor R20 and connected to the first power supply voltage through a resistor R16. The power supply terminal of the operational amplifier U2 is grounded and connected to the first power supply voltage through a capacitor C29. The output terminal of the operational amplifier U2 is grounded through a capacitor C27 and connected to the signal acquisition pin of the MCU through a resistor R15.

[0019] A further technical solution is that the capacitor C11, the capacitor C21 and the capacitor C22 are electrolytic capacitors, the positive electrode of the capacitor C11 is connected to one end of the resistor R12, and the negative electrode of the capacitor C11 is grounded;

[0020] The positive electrode of the capacitor C21 is connected to the output terminal of the operational amplifier U1 and the anode of the diode D1, the negative electrode of the capacitor C21 is connected to one end of the resistor R18 and the negative electrode of the capacitor C22, and the positive electrode of the capacitor C22 is connected to the inverting input terminal of the operational amplifier U2 through the resistor R13.

[0021] A further technical solution is that the lighting control circuit includes a switch tube Q16, a resistor R73 and a resistor R71, wherein:

[0022] The third electrode of the switch tube Q16 is connected to the negative electrode of the auxiliary lamp, the second electrode of the switch tube Q16 is connected to the control signal output pin of the MCU through the resistor R73, one end of the resistor R71 is connected to the first electrode of the switch tube Q16, and the other end of the resistor R71 is connected to the control signal output pin of the MCU.

[0023] A further technical solution is that the lighting control circuit includes a first-level overcurrent protection unit and a second-level overcurrent protection unit. The first-level overcurrent protection unit includes a restoreable fuse F1. One end of the restoreable fuse F1 is connected to the first electrode of the switch tube Q16, and the other end of the restoreable fuse F1 is connected to the second-level overcurrent protection unit.

[0024] A further technical solution is that the second-level overcurrent protection unit includes a switch tube Q17, a resistor R70, a resistor R74 and a resistor R76, wherein:

[0025] The second electrode of the switch tube Q17 is connected to one end of the resettable fuse F1, and the second electrode of the switch tube Q17 is also connected to the first electrode of the switch tube Q17 through the resistor R70 and grounded. The third electrode of the switch tube Q17 is connected to the detection pin of the MCU through the resistor R76, and the third electrode of the switch tube Q17 is also connected to the second power supply voltage through the resistor R74.

[0026] A further technical solution is that the switch tube Q16 and the switch tube Q17 are both NPN transistors.

[0027] The beneficial technical effects of the utility model are:

[0028] The electric vehicle alarm provided by the utility model can use the human body infrared acquisition circuit to collect the sensing signal of the human body detection sensor, and amplify the sensing signal and transmit it to the MCU. When the electric vehicle user approaches the electric vehicle, the auxiliary lamps can be automatically lit through the light control circuit, so that the light in the charging port, key port and seat barrel is enhanced, and the lighting conditions are improved, thereby improving the efficiency and convenience of the use of the electric vehicle and enhancing the user experience.

[0029] Furthermore, the human infrared acquisition circuit features a secondary signal amplification unit, enabling the MCU to quickly respond to sensor signals and improve human detection sensitivity. The lighting control circuit also incorporates overcurrent protection, quickly protecting the load, specifically the auxiliary lamps, ensuring high reliability and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a block diagram of the connection between an electric vehicle alarm with intelligent lighting control function, an infrared sensor and an auxiliary lamp in one embodiment of the utility model.

[0031] Figure 2 This is a circuit schematic diagram of an embodiment of the signal amplification module provided by the present invention.

[0032] Figure 3 This is a circuit schematic diagram of an embodiment of a lighting control module provided by the present utility model. DETAILED DESCRIPTION

[0033] The specific implementation of the present utility model will be further described below with reference to the accompanying drawings.

[0034] The utility model provides an electric vehicle alarm with intelligent lighting control function, including MCU, human infrared acquisition circuit and lighting control circuit, wherein:

[0035] like Figure 1 As shown, the human infrared acquisition circuit includes an input module and a signal amplification module, the input module is connected to the human detection sensor, and the signal amplification module is connected to the MCU;

[0036] The input module is used to receive the sensing signal output by the human body detection sensor, and the signal amplification module is used to amplify the sensing signal and transmit it to the MCU;

[0037] The light control circuit is connected to the auxiliary lamp and the MCU, and the MCU is used to control the working state of the auxiliary lamp through the light control circuit according to the amplified sensor signal.

[0038] Specifically, the human detection sensor is used to detect and sense the presence of the human body and generate a corresponding sensor signal. The MCU determines whether a user is approaching the electric vehicle based on the amplified sensor signal. When the MCU determines that a user is approaching the electric vehicle, the MCU controls the auxiliary lamps to light up through the light control circuit to realize the intelligent lighting function, which is convenient for users to charge, start the vehicle and open the seat bucket to search for items, thereby improving the efficiency and convenience of using the electric vehicle and enhancing the user experience.

[0039] The human detection sensor and auxiliary lighting are installed near the charging port, keyhole, and seat of the electric vehicle. The specific installation location can be selected according to actual conditions, with the human detection sensor being able to accurately detect the presence of a person and the auxiliary lighting being able to illuminate the charging port, keyhole, and seat when illuminated. The specific form and operating principle of the human infrared acquisition circuit and lighting control circuit can be referred to in the following description.

[0040] Furthermore, the input module of the human body infrared acquisition circuit includes a resistor R14, a resistor R17 and a capacitor C24;

[0041] The signal output pin of the human body detection sensor is grounded through the capacitor C24, one end of the resistor R17 is connected to the signal output pin of the human body detection sensor, one end of the capacitor C24, and one end of the resistor R14, the other end of the resistor R17 is grounded, and the other end of the resistor R14 is connected to the signal amplification module.

[0042] In this embodiment, the human body detection sensor can be a human body infrared sensor S1, and its specific form is consistent with the existing technology. Figure 2 As shown, the O pin of the human infrared sensor S1 is the signal output pin. The power pin, or B pin, of the human infrared sensor S1 is connected to a first power supply voltage via resistor R11. The ground pin, or G pin, of the human infrared sensor S1 is grounded. The human infrared sensor S1 collects infrared radiation emitted by the human body and converts it into a weak electrical signal, or sensing signal. The sensing signal is filtered by capacitor C24 and then divided by resistors R17 and R14 to convert it into a voltage signal, which is then input into the signal amplification module.

[0043] Furthermore, the signal amplification module includes a first-stage amplification unit, which includes an operational amplifier U1, a resistor R9, a resistor R12, a diode D1, a capacitor C11, a capacitor C18, and a capacitor C28, wherein:

[0044] The non-inverting input terminal of the operational amplifier U1 is connected to one end of the resistor R14, the inverting input terminal of the operational amplifier U1 is connected to the cathode of the diode D1, the cathode of the diode D1 is connected to one end of the resistor R12 and one end of the resistor R9, the other end of the resistor R12 is grounded via the capacitor C11, the other end of the resistor R9 is connected to the anode of the diode D1, the anode of the diode D1 is connected to the output terminal of the operational amplifier U1, and the capacitor C18 is connected in parallel with the resistor R9;

[0045] The power supply terminal of the operational amplifier U1 is grounded through the capacitor C28 and connected to the first power supply voltage. The ground terminal of the operational amplifier U1 is also grounded.

[0046] Specifically, capacitor C11 is an electrolytic capacitor, the positive electrode of which is connected to one end of resistor R12, and the negative electrode of which is grounded. The operational amplifier U1, resistor R12, capacitor C11, diode D1, resistor R9, and capacitor C18 form a negative amplification feedback circuit that amplifies the voltage signal input to operational amplifier U1. Capacitor C28 acts as a filter capacitor at the power supply terminal of operational amplifier U1, providing filtering protection. In this embodiment, the first power supply voltage is 3V.

[0047] Furthermore, the signal amplification module further includes a DC isolation filter unit and a second-stage amplification unit. The DC isolation filter unit includes a capacitor C21, a capacitor C23 and a resistor R18, wherein:

[0048] The output end of the operational amplifier U1 is grounded via a capacitor C23 and connected to one end of a resistor R18 via a capacitor C21 . The other end of the resistor R18 is grounded.

[0049] Specifically, capacitors C23 and C21 are used to filter and isolate DC components, resistor R18 plays a current limiting role, and the voltage signal output by the operational amplifier U1 is input to the second-stage amplification unit after being DC-isolated and filtered.

[0050] Furthermore, the second-stage amplifying unit includes an operational amplifier U2, a resistor R10, a resistor R13, a resistor R15, a resistor R16, a resistor R20, a capacitor C17, a capacitor C22, a capacitor C27, and a capacitor C29, wherein:

[0051] One end of the resistor R13 is connected to one end of the resistor R18 via the capacitor C22, the other end of the resistor R13 is connected to the inverting input terminal of the operational amplifier U2, the inverting input terminal of the operational amplifier U2 is connected to the output terminal of the operational amplifier U2 via the resistor R10, and the capacitor C17 is connected in parallel with the resistor R10;

[0052] The non-inverting input terminal of the operational amplifier U2 is grounded through a resistor R20 and connected to the first power supply voltage through a resistor R16. The power supply terminal of the operational amplifier U2 is grounded and connected to the first power supply voltage through a capacitor C29. The output terminal of the operational amplifier U2 is grounded through a capacitor C27 and connected to the signal acquisition pin of the MCU through a resistor R15.

[0053] Specifically, capacitors C21 and C22 are also electrolytic capacitors. The positive electrode of capacitor C21 is connected to the output terminal of operational amplifier U1 and the anode of diode D1, and the negative electrode of capacitor C21 is connected to one end of resistor R18 and the negative electrode of capacitor C22. The positive electrode of capacitor C22 is connected to the inverting input terminal of operational amplifier U2 via resistor R13. Capacitors C29 and C22 are filter protection capacitors. Operational amplifier U2, resistors R10, R13, and capacitor C17 form a negative amplifier feedback circuit to perform a two-stage amplification on the voltage signal to fully amplify the collected voltage signal, facilitating the MCU to respond and judge. The voltage signal after the two-stage amplification is filtered by capacitor C27 and resistor R15 and input to the signal acquisition pin of the MCU. The MCU compares the received voltage signal with a preset threshold value. When the voltage signal value is greater than the preset threshold value, the MCU determines that a user is approaching the electric vehicle and controls the auxiliary lamps to light up through the light control circuit.

[0054] Further, if Figure 3 As shown, the lighting control circuit includes a switch tube Q16, a resistor R73 and a resistor R71, wherein the third electrode of the switch tube Q16 is connected to the negative electrode of the auxiliary lamp, the second electrode of the switch tube Q16 is connected to the control signal output pin of the MCU through the resistor R73, one end of the resistor R71 is connected to the first electrode of the switch tube Q16, and the other end of the resistor R71 is connected to the control signal output pin of the MCU.

[0055] The lighting control circuit controls the cathode of the auxiliary lamp. This means the auxiliary lamp's cathode remains connected to power, and the auxiliary lamp is illuminated by grounding its cathode. The power voltage supplied to the auxiliary lamp's cathode can be drawn from an alarm. In this embodiment, the switch Q16 is an NPN transistor. For a transistor, the first electrode is the emitter, the second electrode is the base, and the third electrode is the collector. Figure 3 The LC pin shown is the control signal output pin of the MCU. When the MCU determines that a user is approaching the electric vehicle, it outputs a high-level control signal through the LC pin, making the voltage difference between the base and emitter of the switch tube Q16 greater than the conduction voltage of the switch tube Q16. The switch tube Q16 is turned on, the negative pole of the auxiliary lamp is grounded, and the auxiliary lamp is lit.

[0056] Furthermore, the lighting control circuit further includes a primary overcurrent protection unit and a secondary overcurrent protection unit. The primary overcurrent protection unit includes a resettable fuse F1, and the secondary overcurrent protection unit includes a switch tube Q17, a resistor R70, a resistor R74, and a resistor R76.

[0057] One end of the restoreable fuse F1 is connected to the first electrode of the switch tube Q16, and the other end of the restoreable fuse F1 is connected to the second electrode of the switch tube Q17. The second electrode of the switch tube Q17 is also connected to the first electrode of the switch tube Q17 through the resistor R70 and is grounded. The third electrode of the switch tube Q17 is connected to the detection pin of the MCU through the resistor R76, and the third electrode of the switch tube Q17 is also connected to the second power supply voltage through the resistor R74.

[0058] Specifically, the second power supply voltage is 3.3V, and the switch Q17 is also an NPN transistor. The definitions of the first electrode, second electrode, and third electrode of the switch Q17 are the same as those of the first electrode, second electrode, and third electrode of the transistor described above and are not further described here. In a specific implementation, the switches Q16 and Q17 may also be other power devices with switching functions.

[0059] When switch Q16 is turned on, the auxiliary lamp's cathode is connected to ground via resettable fuse F1 and resistor R70, forming a power supply circuit that illuminates the auxiliary lamp. Resettable fuse F1 provides primary overcurrent protection. When excessive current flows through the auxiliary lamp's power supply circuit, resettable fuse F1 activates, directly shutting off the circuit to prevent damage to the auxiliary lamp. Resettable fuse F1 automatically returns to a low-resistance state after the overcurrent fault is resolved, making it reusable and reducing maintenance costs.

[0060] Figure 3The GLJC pin shown is the MCU's detection pin, and resistor R70 is the current sampling resistor for the power supply circuit. When the power supply circuit current is normal, switch Q17 is off, and the GLJC pin is pulled high via resistors R76 and R74. When the power supply circuit current is excessive, the voltage across resistor R70 increases, increasing the base-emitter voltage difference between switch Q17. When the base-emitter voltage difference between switch Q17 exceeds its turn-on voltage, switch Q17 turns on, pulling the GLJC pin down to ground. In other words, when the power supply circuit current is excessive, the GLJC pin is low. When the MCU detects a low GLJC pin, it actively flips the LC pin to low, turning off switch Q16. This disconnects the auxiliary lamp's negative terminal from ground, severing the power supply circuit and implementing secondary overcurrent protection to prevent damage to the auxiliary lamp. By providing both primary and secondary overcurrent protection units, the auxiliary lamp's power supply circuit is fully protected against overcurrent, improving circuit reliability and stability.

[0061] The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiment. It is understood that other improvements and variations directly derived or imagined by those skilled in the art without departing from the spirit and concept of the present invention should be considered to be included in the scope of protection of the present invention.

Claims

1. An electric vehicle alarm with intelligent lighting control function, characterized in that: It includes MCU, human infrared acquisition circuit and lighting control circuit, among which, The human body infrared acquisition circuit includes an input module and a signal amplification module connected to each other, the input module is connected to the human body detection sensor, and the signal amplification module is connected to the MCU; The input module is used to receive the sensing signal output by the human body detection sensor, and the signal amplification module is used to amplify the sensing signal and transmit it to the MCU; The light control circuit is connected to the auxiliary lamp and the MCU, and the MCU is used to control the working state of the auxiliary lamp through the light control circuit according to the amplified sensor signal.

2. The electric vehicle alarm with intelligent lighting control function according to claim 1 is characterized in that: The input module includes a resistor R14, a resistor R17 and a capacitor C24; The signal output pin of the human body detection sensor is grounded through the capacitor C24, one end of the resistor R17 is connected to the signal output pin of the human body detection sensor, one end of the capacitor C24, and one end of the resistor R14, the other end of the resistor R17 is grounded, and the other end of the resistor R14 is connected to the signal amplification module.

3. The electric vehicle alarm with intelligent lighting control function according to claim 2 is characterized in that: The signal amplification module includes a first-stage amplification unit, which includes an operational amplifier U1, a resistor R9, a resistor R12, a diode D1, a capacitor C11, a capacitor C18, and a capacitor C28, wherein: The non-inverting input terminal of the operational amplifier U1 is connected to one end of the resistor R14, the inverting input terminal of the operational amplifier U1 is connected to the cathode of the diode D1, the cathode of the diode D1 is connected to one end of the resistor R12 and one end of the resistor R9, the other end of the resistor R12 is grounded via the capacitor C11, the other end of the resistor R9 is connected to the anode of the diode D1, the anode of the diode D1 is connected to the output terminal of the operational amplifier U1, and the capacitor C18 is connected in parallel with the resistor R9; The power supply terminal of the operational amplifier U1 is grounded through the capacitor C28 and connected to the first power supply voltage. The ground terminal of the operational amplifier U1 is also grounded.

4. The electric vehicle alarm with intelligent lighting control function according to claim 3 is characterized in that: The signal amplification module further includes a DC isolation filter unit, which includes a capacitor C21, a capacitor C23 and a resistor R18, wherein: The output end of the operational amplifier U1 is grounded via a capacitor C23 and connected to one end of a resistor R18 via a capacitor C21 . The other end of the resistor R18 is grounded.

5. The electric vehicle alarm with intelligent lighting control function according to claim 4 is characterized in that: The signal amplification module further includes a second-stage amplification unit, which includes an operational amplifier U2, a resistor R10, a resistor R13, a resistor R15, a resistor R16, a resistor R20, a capacitor C17, a capacitor C22, a capacitor C27, and a capacitor C29, wherein: One end of the resistor R13 is connected to one end of the resistor R18 via the capacitor C22, the other end of the resistor R13 is connected to the inverting input terminal of the operational amplifier U2, the inverting input terminal of the operational amplifier U2 is connected to the output terminal of the operational amplifier U2 via the resistor R10, and the capacitor C17 is connected in parallel with the resistor R10; The non-inverting input terminal of the operational amplifier U2 is grounded through a resistor R20 and connected to the first power supply voltage through a resistor R16. The power supply terminal of the operational amplifier U2 is grounded and connected to the first power supply voltage through a capacitor C29. The output terminal of the operational amplifier U2 is grounded through a capacitor C27 and connected to the signal acquisition pin of the MCU through a resistor R15.

6. The electric vehicle alarm with intelligent lighting control function according to claim 5, characterized in that: The capacitors C11, C21 and C22 are electrolytic capacitors, the positive electrode of the capacitor C11 is connected to one end of the resistor R12, and the negative electrode of the capacitor C11 is grounded; The positive electrode of the capacitor C21 is connected to the output terminal of the operational amplifier U1 and the anode of the diode D1, the negative electrode of the capacitor C21 is connected to one end of the resistor R18 and the negative electrode of the capacitor C22, and the positive electrode of the capacitor C22 is connected to the inverting input terminal of the operational amplifier U2 through the resistor R13.

7. The electric vehicle alarm with intelligent lighting control function according to claim 1, characterized in that: The lighting control circuit includes a switch tube Q16, a resistor R73 and a resistor R71, wherein: The third electrode of the switch tube Q16 is connected to the negative electrode of the auxiliary lamp, the second electrode of the switch tube Q16 is connected to the control signal output pin of the MCU through the resistor R73, one end of the resistor R71 is connected to the first electrode of the switch tube Q16, and the other end of the resistor R71 is connected to the control signal output pin of the MCU.

8. The electric vehicle alarm with intelligent lighting control function according to claim 7, characterized in that: The lighting control circuit includes a primary overcurrent protection unit and a second-stage overcurrent protection unit. The primary overcurrent protection unit includes a restoreable fuse F1. One end of the restoreable fuse F1 is connected to the first electrode of the switch tube Q16, and the other end of the restoreable fuse F1 is connected to the second-stage overcurrent protection unit.

9. The electric vehicle alarm with intelligent lighting control function according to claim 8, characterized in that: The second-level overcurrent protection unit includes a switch tube Q17, a resistor R70, a resistor R74 and a resistor R76, wherein: The second electrode of the switch tube Q17 is connected to one end of the resettable fuse F1, and the second electrode of the switch tube Q17 is also connected to the first electrode of the switch tube Q17 through the resistor R70 and grounded. The third electrode of the switch tube Q17 is connected to the detection pin of the MCU through the resistor R76, and the third electrode of the switch tube Q17 is also connected to the second power supply voltage through the resistor R74.

10. The electric vehicle alarm with intelligent lighting control function according to claim 9, characterized in that: The switch tube Q16 and the switch tube Q17 are both NPN transistors.

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