Capacitance key testing device

Abstract

The utility model discloses a capacitor button testing device, and particularly relates to the field of capacitor button testing, the capacitor button testing device comprises a device main body, the outer surface of the device main body is provided with a plurality of buttons; a micro-control unit U1, a low dropout linear regulator T1, filter capacitors C4 and C5, signal line series resistors R1, R3, R4, R5, R6, R7, R8, R9, R10 and R11, a filter capacitor C1, an adjusting capacitor C2, an energy storage capacitor C3 and feedback signal current limiting resistors R12, R13, R14, R15, R16, R17, R18, R19, R20, R21 and R22 are arranged in the device body 1. The capacitor key testing device is composed of the MCU and the bypass circuit thereof, the MCU can be driven by externally connecting a 5V2A direct-current power supply, the CN1 is connected with the capacitor key, when a tester touches the key, the corresponding LED is lightened, and therefore product testing is completed, cost is low, the principle is simple and easy to understand, operation is easy, quality control over the capacitor key by a factory is better facilitated, the requirement for entry of a testing post is low, and testing efficiency is high. And the company cost can be saved.

Description

Technical Field

[0001] The utility model relates to the field of capacitive button testing, and more specifically, to a testing device for capacitive buttons. Background Art

[0002] Touch buttons have the advantages of beauty, durability, low cost, long service life, etc., and are applied in more and more devices. At present, the widely adopted touch buttons are capacitive touch buttons, and traditional testing devices are costly, complex in principle, and cumbersome to operate. Summary of the Utility Model

[0003] In order to overcome the above-mentioned defects of the prior art, an embodiment of the utility model provides a testing device for capacitive buttons, which consists of an MCU and its bypass circuit. Connecting an external 5V_2A DC power supply can drive the MCU. CN1 is connected to the capacitive button. When the tester touches the button, the corresponding LED will be lit, thus completing the product test. It has low cost, simple and easy-to-understand principle, simple operation, is more conducive to the quality control of capacitive buttons in factories, has low requirements for the entry of testing positions, and is beneficial to saving the company's costs.

[0004] To achieve the above object, the utility model provides the following technical solution: a testing device for capacitive buttons, comprising: a device main body, and a plurality of buttons are arranged on the outer surface of the device main body;

[0005] Inside the device main body 1, there are a micro control unit U1, a low dropout linear regulator T1, filtering capacitors C4, C5, signal line series resistors R1, R3, R4, R5, R6, R7, R8, R9, R10, R11, a filtering capacitor C1, an adjusting capacitor C2, an energy storage capacitor C3, feedback signal current limiting resistors R12, R13, R14, R15, R16, R17, R18, R19, R20, R21, R22, and feedback LED lights D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11.

[0006] Further, a PET protective film is pasted on the outer surface of the device main body.

[0007] Further, the micro control unit U1 is specifically a control chip, and the output end of the filtering capacitor C5 is electrically connected to the control chip.

[0008] Further, the output end of the filtering capacitor C4 is electrically connected to the low dropout linear regulator T1.

[0009] Further, the plurality of buttons are numbered Key1-Key11, and Key1-Key11 are respectively electrically connected to the feedback LED lights D1-D11.

[0010] Technical effects and advantages of the present utility model:

[0011] It consists of an MCU and its bypass circuit. Connecting an external 5V_2A DC power supply can drive the MCU. CN1 is connected to a capacitive button. When the tester touches the button, the corresponding LED will be lit, thus completing the product test. It has low cost, simple principle and easy to understand, simple operation, is more conducive to the quality control of capacitive buttons in the factory, has low requirements for the entry of test positions, and is conducive to saving the company's costs. Description of the drawings

[0012] Figure 1 It is the front view of the whole present utility model.

[0013] Figure 2 It is the rear view of the whole present utility model.

[0014] Figure 3 It is the circuit diagram of the whole device of the present utility model.

[0015] Reference numerals are: 1, device main body; 2, button; 3, PET protective film. Specific implementation manners

[0016] The present utility model provides a test device for capacitive buttons as shown in Figures 1-3 which includes: a device main body 1, and a plurality of buttons 2 are arranged on the outer surface of the device main body 1;

[0017] Inside the device main body 1, there are a micro control unit U1, a low dropout linear regulator T1, filtering capacitors C4, C5, signal line series resistors R1, R3, R4, R5, R6, R7, R8, R9, R10, R11, filtering capacitor C1, adjusting capacitor C2, energy storage capacitor C3, feedback signal current limiting resistors R12, R13, R14, R15, R16, R17, R18, R19, R20, R21, R22, and feedback LED lights D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11.

[0018] Furthermore, a PET protective film 3 is pasted on the outer surface of the device main body 1.

[0019] Furthermore, the micro control unit U1 is specifically a control chip. The output end of the filtering capacitor C5 is electrically connected to the control chip, and the 5V voltage is converted into 3.3V voltage to provide the control chip U1 through the filtering capacitor C5.

[0020] Furthermore, the output end of the filtering capacitor C4 is electrically connected to the low dropout linear regulator T1. CN2 inputs a 5V power supply, which is filtered by C4 and then passes through the low dropout linear regulator T1.

[0021] Further, a plurality of buttons 2 are numbered Key1 - Key11, and Key1 - Key11 are respectively electrically connected to feedback LED lights D1 - D11. Key1 - Key11 respectively control LED lights D1 - D11, and the touch sensitivity of Key1 - Key11 can be controlled by changing the value of capacitor C2.

[0022] The working principle of the present utility model:

[0023] Refer to the attached instruction manual Figures 1-3 , 5V power supply is input to CN2, after being filtered by C4, it passes through the low-dropout linear voltage regulator T1 to convert the 5V voltage into 3.3V voltage and provides it to the control chip U1 through the filter capacitor C5; Key1 - Key11 respectively control LED lights D1 - D11, and the touch sensitivity of Key1 - Key11 can be controlled by changing the value of capacitor C2.

Claims

1. A test device for a capacitive button, characterized in that, Including: A device main body (1), on the outer surface of the device main body (1), several buttons (2) are provided; Inside the device main body (1), a micro control unit U1, a low dropout linear regulator T1, filtering capacitors C4, C5, signal line series resistors R1, R3, R4, R5, R6, R7, R8, R9, R10, R11, a filtering capacitor C1, an adjusting capacitor C2, an energy storage capacitor C3, feedback signal current limiting resistors R12, R13, R14, R15, R16, R17, R18, R19, R20, R21, R22, and feedback LED lights D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11 are provided.

2. The test device for a capacitive button according to claim 1, wherein: A PET protective film (3) is pasted on the outer surface of the device main body (1).

3. The test device for a capacitive button according to claim 1, wherein: The micro control unit U1 is specifically a control chip, and the output end of the filtering capacitor C5 is electrically connected to the control chip.

4. The test device for a capacitive button according to claim 1, characterized in that: The output end of the filtering capacitor C4 is electrically connected to the low dropout linear regulator T1.

5. The test device for a capacitive button according to claim 1, wherein: The several buttons (2) are numbered Key1 - Key11, and Key1 - Key11 are respectively electrically connected to the feedback LED lights D1 - D11.

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