Device for realizing visual detection of electric control switch system of electric bicycle

Abstract

The utility model provides a device for realizing visual detection of an electric bicycle electric appliance control switch system, which comprises a detection platform body, a display screen and a plurality of outgoing line plug-ins, the display screen is arranged on one side of the detection platform body, a detection circuit is arranged in the detection platform body, the detection circuit is connected with the outgoing line plug-ins through cables, and the outgoing line plug-ins are connected with the display screen. The detection circuit is also connected with the display screen, and the upper and lower sides of the display screen are respectively used for installing a plurality of LED lamps of the detection circuit. The beneficial effects of the utility model are that the operation is simple, the assembly process of various auxiliary detection parts before detection is omitted, and the detection efficiency is improved; switches of different models can be detected, and the universality is high; different models of switches only need to replace the patch cord, so that the manufacturing cost of the testing fixture for the different models of switches and the time cost for finding corresponding testing fixtures are reduced; and the detection result is more intuitively reflected, and the frequency of misjudgment of personnel is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to electric bicycle electric appliance control switch detection field, especially a kind of device for realizing electric bicycle electric appliance control switch system visual detection. BACKGROUND

[0002] Electric bicycle, usually refers to a kind of bicycle with motor power, is widely used in daily travel and short-distance transport. It usually has smaller wheels, lighter weight and certain battery endurance, and the existing electric bicycle parts handlebar, switch variety, connector and line sequence are inconsistent, when detecting, more gauge test, test efficiency is low, while wasting gauge manufacturing cost and finding corresponding gauge time cost. INVENTION CONTENTS

[0003] Therefore, the utility model aims at providing a kind of device for realizing electric bicycle electric appliance control switch system visual detection, to realize the detection of different switch functions using a kind of device and can more intuitively reflect detection result.

[0004] To achieve the above purpose, the technical scheme of the utility model is as follows:

[0005] A kind of device for realizing electric bicycle electric appliance control switch system visual detection, including detection bench body, display screen and several out-line connectors, the detection bench body side is equipped with display screen, and detection bench body is equipped with detection circuit inside, detection circuit is connected with out-line connector cable, detection circuit is also connected with display screen, and the upper and lower sides of display screen are respectively used to install the several LED lamps of detection circuit.

[0006] Further, the side above the detection bench body is trapezoidal body structure, and the display screen and several out-line connectors are installed on the trapezoidal body structure.

[0007] Further, the number of out-line connector is 3.

[0008] Further, the detection circuit includes voltage conversion module, power supply filter module, signal output filter module, voltmeter and detection module, one end of voltage conversion module is connected with power input, the other end of voltage conversion module is connected with power supply filter module, signal output filter module, voltmeter and detection module respectively, the other end of power supply filter module is connected to voltmeter through signal output filter module, voltmeter is connected with display screen, and test handlebar acceleration sensor is also connected between power supply filter module and signal output filter module.

[0009] Further, the voltage conversion module comprises a diode D1, an inductor L1, a capacitor C1, a transformer BYQ1, a diode D3, an inductor L4, a capacitor C5 and a transformer BYQ2, one end of the diode D1 and the diode D3 is connected to the power input, the other end of the diode D1 is connected to the power filtering module through the inductor L1 and the transformer BYQ1 in turn, and the inductor L1 is further connected to the ground through the capacitor C1, the other end of the diode D3 is connected to the detection module through the inductor L4 and the transformer BYQ2 in turn, and the inductor L4 is further connected to the ground through the capacitor C5.

[0010] Further, the voltage conversion module comprises a diode D1, an inductor L1, a capacitor C1, a transformer BYQ1, a diode D3, an inductor L4, a capacitor C5, a transformer BYQ2, a diode D4, an inductor L5, a capacitor C6 and a transformer BYQ3, one end of the diode D1, the diode D3 and the diode D4 is connected to the power input, the other end of the diode D1 is connected to the power filtering module through the inductor L1 and the transformer BYQ1 in turn, and the inductor L1 is further connected to the ground through the capacitor C1, the other end of the diode D3 is connected to the detection module through the inductor L4 and the transformer BYQ2 in turn, and the inductor L4 is further connected to the ground through the capacitor C5, the other end of the diode D4 is connected to the detection module through the inductor L5 and the transformer BYQ3 in turn, and the inductor L5 is further connected to the ground through the capacitor C6.

[0011] Further, the power filtering module comprises a diode D2, an inductor L2 and a capacitor C2, one end of the diode D2 is connected to the transformer BYQ1, the other end of the diode D2 is connected to one end of the inductor L2, and the other end of the inductor L2 is connected to the capacitor C2 and the test handle acceleration sensor respectively.

[0012] Further, the signal output filtering module comprises a resistor R13, an inductor L3, a capacitor C3 and a capacitor C4, the R13 is connected to the voltmeter through the inductor L3, and the capacitor C3 is further connected to the capacitor C3 and the capacitor C4 respectively.

[0013] Further, the detection module comprises socket 1, switch 1, resistor R1, LED 1, socket 2, switch 2, resistor R2, LED 2, socket 3, switch 3, resistor R3, LED 3, socket 4, switch 4, resistor R4, LED 4, socket 5, switch 5, resistor R5, LED 5, socket 6, switch 6, resistor R6 and LED 6, one end of the socket 1, switch 1, LED 1, socket 2, switch 2, LED 2, socket 3, switch 3, LED 3, socket 4, switch 4, LED 4, socket 5, switch 5, LED 5, socket 6, switch 6 and LED 6 is connected to transformer BYQ2, the other end of the socket 1, switch 1 is connected to LED 1 through resistor R1, the other end of the socket 2, switch 2 is connected to LED 2 through resistor R2, the other end of the socket 3, switch 3 is connected to LED 3 through resistor R3, the other end of the socket 4, switch 4 is connected to LED 4 through resistor R4, the other end of the socket 5, switch 5 is connected to LED 5 through resistor R5, the other end of the socket 6, switch 6 is connected to LED 6 through resistor R6.

[0014] Further, the detection module comprises socket 1, switch 1, resistor R1, LED 1, socket 2, switch 2, resistor R2, LED 2, socket 3, switch 3, resistor R3, LED 3, socket 4, switch 4, resistor R4, LED 4, socket 5, switch 5, resistor R5, LED 5, socket 6, switch 6, resistor R6, LED 6, socket 7, switch 7, resistor R7, LED 7, socket 8, switch 8, resistor R8, LED 8, socket 9, switch 9, resistor R9, LED 9, socket 10, switch 10, resistor R10, LED 10, socket 11, switch 11, resistor R11, LED 11, socket 12, switch 12, resistor R12 and LED 12, one end of the socket 1, switch 1, LED 1, socket 2, switch 2, LED 2, socket 3, switch 3, LED 3, socket 4, switch 4, LED 4, socket 5, switch 5, LED 5, socket 6, switch 6 and LED 6 is connected to transformer BYQ2, the other end of the socket 1, switch 1 is connected to LED 1 through resistor R1, the other end of the socket 2, switch 2 is connected to LED 2 through resistor R2, the other end of the socket 3, switch 3 is connected to LED 3 through resistor R3, the other end of the socket 4, switch 4 is connected to LED 4 through resistor R4, the other end of the socket 5, switch 5 is connected to LED 5 through resistor R5, the other end of the socket 6, switch 6 is connected to LED 6 through resistor R6;

[0015] The one end of the socket 7, switch 7, LED 7, socket 8, switch 8, LED 8, socket 9, switch 9, LED 9, socket 10, switch 10, LED 10, socket 11, switch 11, LED 11, socket 12, switch 12 and LED 12 are connected to the transformer BYQ3, the other end of the socket 7, switch 7 is connected to the LED 7 through the resistance R7, the other end of the socket 8, switch 8 is connected to the LED 8 through the resistance R8, the other end of the socket 9, switch 9 is connected to the LED 9 through the resistance R9, the other end of the socket 10, switch 10 is connected to the LED 10 through the resistance R10, the other end of the socket 11, switch 11 is connected to the LED 11 through the resistance R11, and the other end of the socket 12, switch 12 is connected to the LED 12 through the resistance R12.

[0016] Compared with the prior art, the device for visual detection of the electric bicycle electric appliance control switch system has the following advantages:

[0017] The device for visual detection of the electric bicycle electric appliance control switch system is simple to operate, eliminates the assembly process of various auxiliary detection components before detection, improves detection efficiency, can detect different models of switches, has strong universality, only needs to replace the adapter line for different models of switches, reduces the manufacturing cost and time cost of finding the corresponding detection tool for different models of switches, and more intuitively reflects the detection result, thereby reducing the frequency of misjudgment by personnel. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings that form a part of this application provide further understanding of the present application, and the exemplary embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0019] Fig. 1 The overall structure schematic diagram of the embodiment of the present application;

[0020] Fig. 2 The test tool detection principle schematic diagram of the embodiment of the present application.

[0021] Legend:

[0022] 1, detection table body; 2, display screen; 3, outgoing line plug-in. DETAILED DESCRIPTION

[0023] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0024] In the description of the utility model, it needs to be understood that, the orientation or positional relation indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or positional relation shown based on the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0025] In the description of the utility model, it needs to be understood that, the orientation or positional relation indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or positional relation shown based on the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0026] The utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0027] As Figs. 1-2 Indicated, a kind of implementation electric bicycle electric appliance control switch system visual detection device, including detection bench body 1, display screen 2 and several outlet inserts 3, display screen 2 is installed in detection bench body 1 side, detection bench body 1 inside is equipped with detection circuit, detection circuit is connected with outlet insert 3 cable, detection circuit is also connected with display screen, the upper and lower sides of display screen 2 are respectively used to install the several LED lamps of detection circuit.

[0028] The utility model has the advantages of:

[0029] Simple operation, dispenses with the assembly process of various auxiliary detection components before detection, improves detection efficiency;Different models of switches can be detected, and the versatility is strong;Different models of switches only need to replace adapter cord, reduce the manufacturing cost of different models of switch detection tools and the time cost of finding corresponding detection tools;More intuitive to reflect detection result, reduce the frequency of personnel misjudgment.

[0030] In a preferred embodiment of the utility model, the detection platform body 1 is trapezoidal structure on one side, install display screen 2 and several outlet plug 3 on trapezoidal structure, the purpose of setting trapezoidal structure is to facilitate staff to check.

[0031] In a preferred embodiment of the utility model, the number of outlet plug 3 is 3, in this embodiment, the switch of different plug can be connected to different adapter wire test.

[0032] In a preferred embodiment of the utility model, the detection circuit includes voltage conversion module, power supply filter module, signal output filter module, voltmeter and detection module, one end of voltage conversion module is connected to power input, the other end of voltage conversion module is connected to power supply filter module, signal output filter module, voltmeter and detection module respectively, the other end of power supply filter module is connected to voltmeter through signal output filter module, voltmeter is connected to display screen 2, power supply filter module and signal output filter module are also connected to test steering wheel acceleration sensor outside between it. Its detection circuit mainly has rectification filter, voltage conversion transforms 220V alternating voltage of power grid into the alternating voltage that needs, and sends to rectification circuit. Rectification circuit transforms alternating voltage into pulsating direct current voltage, and after filter circuit, 48V direct current power supply is output.

[0033] In a preferred embodiment of the utility model, the voltage conversion module includes diode D1, inductance L1, capacitor C1, transformer BYQ1, diode D3, inductance L4, capacitor C5, transformer BYQ2, diode D4, inductance L5, capacitor C6 and transformer BYQ3, one end of diode D1, diode D3, diode D4 is connected to power input, the other end of diode D1 is connected to power supply filter module through inductance L1 and transformer BYQ1 in proper order, and inductance L1 is also connected to ground through capacitor C1, the other end of diode D3 is connected to detection module through inductance L4 and transformer BYQ2 in proper order, and inductance L4 is also connected to ground through capacitor C5, the other end of diode D4 is connected to detection module through inductance L5 and transformer BYQ3 in proper order, and inductance L5 is also connected to ground through capacitor C6. In this embodiment, voltage conversion module can be provided with two voltage conversion submodules or three voltage conversion submodules, and two voltage conversion submodules of the three voltage conversion submodules can correspond to multiple detection modules, which is convenient for detection.

[0034] In a preferred embodiment of the utility model, the power supply filter module includes diode D2, inductance L2 and capacitor C2, one end of diode D2 is connected to transformer BYQ1, the other end of diode D2 is connected to one end of inductance L2, the other end of inductance L2 is connected to capacitor C2 and test steering wheel acceleration sensor respectively.

[0035] In a preferred embodiment of the utility model, the signal output filter module includes resistance R13, inductance L3, capacitor C3 and capacitor C4, R13 is connected to voltmeter through inductance L3, and capacitor C3 is also connected to capacitor C3 and capacitor C4 respectively.

[0036] In a preferred embodiment of the utility model, the detection module includes socket 1, switch 1, resistance R1, LED1, socket 2, switch 2, resistance R2, LED2, socket 3, switch 3, resistance R3, LED3, socket 4, switch 4, resistance R4, LED4, socket 5, switch 5, resistance R5, LED5, socket 6, switch 6, resistance R6, LED6, socket 7, switch 7, resistance R7, LED7, socket 8, switch 8, resistance R8, LED8, socket 9, switch 9, resistance R9, LED9, socket 10, switch 10, resistance R10, LED10, socket 11, switch 11, resistance R11, LED11, socket 12, switch 12, resistance R12 and LED12, one end of socket 1, switch 1, LED1, socket 2, switch 2, LED2, socket 3, switch 3, LED3, socket 4, switch 4, LED4, socket 5, switch 5, LED5, socket 6, switch 6 and LED6 is connected to transformer BYQ2, the other end of socket 1, switch 1 is connected to LED1 through resistance R1, the other end of socket 2, switch 2 is connected to LED2 through resistance R2, the other end of socket 3, switch 3 is connected to LED3 through resistance R3, the other end of socket 4, switch 4 is connected to LED4 through resistance R4, the other end of socket 5, switch 5 is connected to LED5 through resistance R5, and the other end of socket 6, switch 6 is connected to LED6 through resistance R6;

[0037] One end of socket 7, switch 7, LED7, socket 8, switch 8, LED8, socket 9, switch 9, LED9, socket 10, switch 10, LED10, socket 11, switch 11, LED11, socket 12, switch 12 and LED12 is connected to transformer BYQ3, the other end of socket 7, switch 7 is connected to LED7 through resistance R7, the other end of socket 8, switch 8 is connected to LED8 through resistance R8, the other end of socket 9, switch 9 is connected to LED9 through resistance R9, the other end of socket 10, switch 10 is connected to LED10 through resistance R10, the other end of socket 11, switch 11 is connected to LED11 through resistance R11, and the other end of socket 12, switch 12 is connected to LED12 through resistance R12, in actual use, LED lamp can be displayed on display screen 2, and it is convenient for staff to detect the situation.

[0038] The working principle of the device for realizing visual detection of the electric bicycle electric appliance control switch system:

[0039] Brake lever test: Connect one side of the brake lever adapter cable to the test bench cable outlet plug 3, and the other side to the brake lever plug. Squeeze the brake lever handle and the indicator light will illuminate, indicating that the brake lever test is complete.

[0040] Connect one side of the throttle adapter cable to the test bench outlet plug 3, and the other side to the throttle plug. Rotate the throttle, and the screen will display the throttle rotation voltage. Press the throttle headlight switch to turn it on, and the indicator light will illuminate. Press the throttle P-gear button, and the indicator light will illuminate. Press the throttle power comfort switch to switch between different indicator lights. The throttle test is now complete.

[0041] Connect one side of the switch adapter cable to the output plug 3 on the test bench, and the other side to the plug on the switch. Press the horn switch button on the switch, and the corresponding indicator light will light up. Press the headlight switch to turn on, and the indicator light will light up. Turn on the left turn function switch button on the switch, and the left turn indicator light will light up. Turn on the right turn function switch button on the switch, and the right turn indicator light will light up. The function switch test is complete.

[0042] For other different models of throttle switches, simply replace the different adapter cables for testing.

[0043] When adding new status or function switches, different adapter cables are made for connection testing; no internal adjustments are required.

[0044] Example 1

[0045] This testing bench is used to test the rotary brake lever and switch:

[0046] I. Technical Parameters:

[0047] 1. Input voltage: 220V

[0048] 2. Output voltage: 48V

[0049] Instructions for use:

[0050] First, connect the testing platform to a 220V power supply, power on the brake lever and switch gauge, and then connect the corresponding connectors of the switch to the testing platform and the switch. After the components are powered on, operate the switch button on the testing platform to perform the test.

[0051] Example 1: After connecting the corresponding connector, insert the throttle plug into the corresponding port, rotate the throttle, and the screen will display the voltage change during the rotation process.

[0052] The throttle voltage variation range is acceptable if it is between 0.8-4.3V; otherwise, it is unacceptable.

[0053] Turn each function switch on and off, and observe whether the indicator lights light up or turn off accordingly.

[0054] Turn on each function switch, the corresponding indicator light is lit, turn off the switch, the corresponding indicator light is closed, the process is not stuck, delayed, the handle switch is qualified, otherwise it is unqualified.

[0055] Example 2: After connecting the corresponding connector, insert the brake handle connector into the corresponding socket, squeeze and release the brake handle, and observe whether the corresponding signal light is on or off.

[0056] Squeeze the brake handle, the corresponding signal light is on, and the signal light is off when the brake handle is released, the process is not stuck, delayed, the handle switch is qualified, otherwise it is unqualified.

[0057] Notes:

[0058] Before detection, check whether the adapter wire is consistent with the handle and switch model!

[0059] The whole machine should be used in a dry environment!

[0060] Prevent electric shock!

[0061] The utility model can test different models of switches, and can be updated in real time according to the update of products.

[0062] It should be noted that the control program is not improved in the present application, and the control program and electrical devices involved are prior art.

[0063] The above is only a preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A device for implementing visual detection of an electric bicycle electrical appliance control switch system, characterized by: The detection platform body is provided with a display screen on one side, and a detection circuit is arranged in the detection platform body and connected with the cable of the outlet plug and the display screen.

2. The device for visualizing detection of an electric bicycle electrical appliance control switch system according to claim 1, characterized in that: The detection platform body is provided with a display screen on one side, and a detection circuit is arranged in the detection platform body and connected with the cable of the outlet plug and the display screen.

3. The device for visualizing detection of an electric bicycle electrical appliance control switch system according to claim 1, characterized in that: The number of the outlet plug is three.

4. The device for implementing visual detection of an electric bicycle electrical appliance control switch system according to claim 1, characterized in that: The detection circuit comprises a voltage conversion module, a power supply filtering module, a signal output filtering module, a voltmeter and a detection module.

5. The device for implementing visual detection of an electric bicycle electrical appliance control switch system according to claim 4, characterized in that: The voltage conversion module comprises a diode D1, an inductor L1, a capacitor C1, a transformer BYQ1, a diode D3, an inductor L4, a capacitor C5 and a transformer BYQ2.

6. The device for implementing visual detection of an electric bicycle electrical appliance control switch system according to claim 4, characterized in that: The voltage conversion module comprises a diode D1, an inductor L1, a capacitor C1, a transformer BYQ1, a diode D3, an inductor L4, a capacitor C5, a transformer BYQ2, a diode D4, an inductor L5, a capacitor C6 and a transformer BYQ3.

7. The device for implementing visual detection of an electric bicycle electrical appliance control switch system according to claim 4, characterized in that: The power supply filtering module comprises a diode D2, an inductor L2 and a capacitor C2.

8. The device for implementing visual detection of an electric bicycle electrical appliance control switch system according to claim 4, characterized in that: The signal output filtering module comprises a resistor R13, an inductor L3, a capacitor C3 and a capacitor C4.

9. The device for implementing visual detection of an electric bicycle electrical appliance control switch system according to claim 4, characterized in that: The detection module includes socket 1, switch 1, resistance R1, LED1, socket 2, switch 2, resistance R2, LED2, socket 3, switch 3, resistance R3, LED3, socket 4, switch 4, resistance R4, LED4, socket 5, switch 5, resistance R5, LED5, socket 6, switch 6, resistance R6 and LED6, one end of the socket 1, switch 1, LED1, socket 2, switch 2, LED2, socket 3, switch 3, LED3, socket 4, switch 4, LED4, socket 5, switch 5, LED5, socket 6, switch 6 and LED6 is connected to transformer BYQ2, the other end of the socket 1, switch 1 is connected to LED1 through resistance R1, the other end of the socket 2, switch 2 is connected to LED2 through resistance R2, the other end of the socket 3, switch 3 is connected to LED3 through resistance R3, the other end of the socket 4, switch 4 is connected to LED4 through resistance R4, the other end of the socket 5, switch 5 is connected to LED5 through resistance R5, the other end of the socket 6, switch 6 is connected to LED6 through resistance R6.

10. The device for implementing visual detection of an electric bicycle electrical appliance control switch system according to claim 4, characterized in that: The detection module includes socket 1, switch 1, resistance R1, LED1, socket 2, switch 2, resistance R2, LED2, socket 3, switch 3, resistance R3, LED3, socket 4, switch 4, resistance R4, LED4, socket 5, switch 5, resistance R5, LED5, socket 6, switch 6, resistance R6, LED6, socket 7, switch 7, resistance R7, LED7, socket 8, switch 8, resistance R8, LED8, socket 9, switch 9, resistance R9, LED9, socket 10, switch 10, resistance R10, LED10, socket 11, switch 11, resistance R11, LED11, socket 12, switch 12, resistance R12 and LED12, one end of the socket 1, switch 1, LED1, socket 2, switch 2, LED2, socket 3, switch 3, LED3, socket 4, switch 4, LED4, socket 5, switch 5, LED5, socket 6, switch 6 and LED6 is connected to transformer BYQ2, the other end of the socket 1, switch 1 is connected to LED1 through resistance R1, the other end of the socket 2, switch 2 is connected to LED2 through resistance R2, the other end of the socket 3, switch 3 is connected to LED3 through resistance R3, the other end of the socket 4, switch 4 is connected to LED4 through resistance R4, the other end of the socket 5, switch 5 is connected to LED5 through resistance R5, the other end of the socket 6, switch 6 is connected to LED6 through resistance R6; The socket 7, switch 7, LED 7, socket 8, switch 8, LED 8, socket 9, switch 9, LED 9, socket 10, switch 10, LED 10, socket 11, switch 11, LED 11, socket 12, switch 12 and LED 12 are connected to the transformer BYQ3 at one end, and the socket 7, switch 7 are connected to the LED 7 through the resistance R7 at the other end, the socket 8, switch 8 are connected to the LED 8 through the resistance R8 at the other end, the socket 9, switch 9 are connected to the LED 9 through the resistance R9 at the other end, the socket 10, switch 10 are connected to the LED 10 through the resistance R10 at the other end, the socket 11, switch 11 are connected to the LED 11 through the resistance R11 at the other end, and the socket 12, switch 12 are connected to the LED 12 through the resistance R12 at the other end.

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