CN204789805U - Earphone button functional test circuit and applied tool - Google Patents
Earphone button functional test circuit and applied tool Download PDFInfo
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- CN204789805U CN204789805U CN201520488740.4U CN201520488740U CN204789805U CN 204789805 U CN204789805 U CN 204789805U CN 201520488740 U CN201520488740 U CN 201520488740U CN 204789805 U CN204789805 U CN 204789805U
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- power input
- integrated voltage
- test circuit
- functional test
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Abstract
The utility model discloses a headphone button functional test circuit, including the power input end, the integrated steady voltage piece of three -terminal, the earphone inserts the end, the ampere meter, the anodal input foot vin with the integrated steady voltage piece of three -terminal of this power input end is connected, the output pin and the earphone of the integrated steady voltage piece of three -terminal insert the anodal of end and are connected, be connected with second resistance between the output pin of the integrated steady voltage piece of three -terminal and the pressure regulating foot, be connected with third resistance between the negative pole of pressure regulating foot and power input end, the earphone inserts the negative pole of end and is connected and ground connection with the negative pole of power input end, the ampere meter is connected between the input foot and output pin of the integrated steady voltage piece of three -terminal. Use tool economy, the convenience of earphone button functional test circuit, direct power feeding can use, about 3-5 years of life or longer, the frequency of utilization is general, activity duration is short: only need 9.35S, can visual and see concrete numerical value, in addition the about 200 yuan of left and right sides of low price.
Description
Technical field
The utility model relates to earphone testing tool, especially a kind of phones button functional test circuit and application fixture.
Background technology
Mobile phone (as the iphone version) product produced on the market now gets more and more, about 10 ~ 15 sections, corresponding earphone forms a complete production network often, and earphone manufacturer must test the push button function of earphone before dispatching from the factory, the most original is exactly adopt supporting mobile phone to test this earphone, but, for use mobile phone test phones button function, there is following shortcoming: about 3 ~ 5 years serviceable life of mobile phone, be not durable; Activity duration is long, and 15.1S(has the impact such as screen protection, menu); Expensive: about 5000 yuan; Easy loss, and use inconvenient, need charging, safeguard, training tester relative complex.
Utility model content
For solving the problems of the technologies described above, the purpose of this utility model is to provide a kind of phones button functional test circuit.
The technical solution adopted in the utility model is:
A kind of phones button functional test circuit, comprise power input, three end integrated voltage stabilizers, earphone insertion end, reometer, the positive pole of this power input is connected with the input pin Vin of three end integrated voltage stabilizers, the output pin Vout of three end integrated voltage stabilizers is connected with the positive pole of earphone insertion end, the second resistance is connected with between the output pin Vout of three end integrated voltage stabilizers and pressure regulation pin GND, pressure regulation pin GND and and the negative pole of power input between be connected with the 3rd resistance, the negative pole of earphone insertion end is connected and ground connection with the negative pole of power input, between the input pin Vin that reometer is connected to three end integrated voltage stabilizers and output pin Vout.
Power switch is serially connected with between the positive pole of described power input and the input pin Vin of three end integrated voltage stabilizers.
Be serially connected with the first power filtering capacitor, the first high-frequency filter capacitor respectively between the input pin Vin of described three end integrated voltage stabilizers and the negative pole of power input, between output pin Vout and the negative pole of power input, be serially connected with second source filter capacitor, the second high-frequency filter capacitor respectively.
The 4th resistant series that described reometer is also adjustable with one between the input pin Vin and output pin Vout of three end integrated voltage stabilizers.
First resistance, the first light emitting diode successively between the input pin Vin of described three end integrated voltage stabilizers and the negative pole of power input.
Wherein, the model of described three end integrated voltage stabilizers is LM317.
The beneficial effects of the utility model: the tool economy, the convenience that use phones button functional test circuit, directly power supply can use; Training is simple and easy to association, dailyly only needs simple-to-maintain, about 3 ~ 5 years or longer serviceable life; Frequency of utilization is general; Activity duration is short: only need 9.35S, visually can see concrete numerical value, in addition low price about about 200 yuan.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, embodiment of the present utility model is described further.
Fig. 1 is the circuit diagram of the utility model phones button function test fixture.
Embodiment
Be illustrated in figure 1 a kind of phones button functional test circuit of the present utility model, comprise power input (DC5V, GND), power switch S1, three end integrated voltage stabilizer U1, earphone insertion end J1, reometer uA, the positive pole of this power input, power switch S1 is connected with the input pin Vin of three end integrated voltage stabilizer U1, the output pin Vout of three end integrated voltage stabilizer U1 is connected with the positive pole of earphone insertion end J1, the second resistance is connected with between the output pin Vout of three end integrated voltage stabilizer U1 and pressure regulation pin GND, pressure regulation pin GND and and the negative pole of power input between be connected with the 3rd resistance, the negative pole of earphone insertion end J1 is connected and ground connection with the negative pole of power input, between the input pin Vin that reometer uA is connected to three end integrated voltage stabilizer U1 and output pin Vout.
For improving the filtering performance of this circuit, be serially connected with the first power filtering capacitor C1, the first high-frequency filter capacitor C3 between the input pin Vin of three end integrated voltage stabilizer U1 and the negative pole of power input respectively, between output pin Vout and the negative pole of power input, be serially connected with second source filter capacitor C2, the second high-frequency filter capacitor C4 respectively.
As the further optimization of this programme, described reometer uA connects with the 4th resistance R4 also adjustable with between output pin Vout at the input pin Vin of three end integrated voltage stabilizer U1, is mainly used in adjustment or correcting current numerical value.
In addition, between the input pin Vin of three end integrated voltage stabilizer U1 and the negative pole of power input, the first resistance R1, the first light emitting diode D1, R1 are LED current limiting safeguard resistor successively, and the first light emitting diode D1 is as this circuit and the pilot lamp applying this circuit tool.
Wherein, in the technical program, the model of three end integrated voltage stabilizer U1 is LM317.
Principle of work: input DC5.0V, through S1 power switch, from LM317 the 3rd pin input 5.0V voltage, the 1st pin is Voltage Cortrol end, the 2nd pin output voltage.LM317 is three end integrated voltage stabilizers, and R2 is reference resistance, and R3 is sample resistance, and R3 can be adjustable resistance, this resistance value of required voltage adjustable.If with fixed resistance, the computing formula of actual output voltage is: U0=1.25*(1+R3/R2); Experimental formula is: R3=96*2.0V-R2(R2 gets 120 Ω) also can.R4 can be adjustable resistance, main adjustment or correcting current numerical value.J1 inserts iphone earphone, and power supply DC2.0V, from reometer read number, thus judges that whether push button function is qualified.
The foregoing is only preferred embodiments of the present utility model, the utility model is not limited to above-mentioned embodiment, as long as the technical scheme realizing the utility model object with basic same approach all belongs within protection domain of the present utility model.
Claims (7)
1. a phones button functional test circuit, it is characterized in that: comprise power input, three end integrated voltage stabilizers, earphone insertion end, reometer, the positive pole of this power input is connected with the input pin Vin of three end integrated voltage stabilizers, the output pin Vout of three end integrated voltage stabilizers is connected with the positive pole of earphone insertion end, the second resistance is connected with between the output pin Vout of three end integrated voltage stabilizers and pressure regulation pin GND, pressure regulation pin GND and and the negative pole of power input between be connected with the 3rd resistance, the negative pole of earphone insertion end is connected and ground connection with the negative pole of power input, between the input pin Vin that reometer is connected to three end integrated voltage stabilizers and output pin Vout.
2. a kind of phones button functional test circuit according to claim 1, is characterized in that: be serially connected with power switch between the positive pole of described power input and the input pin Vin of three end integrated voltage stabilizers.
3. a kind of phones button functional test circuit according to claim 2, it is characterized in that: be serially connected with the first power filtering capacitor, the first high-frequency filter capacitor respectively between the input pin Vin of described three end integrated voltage stabilizers and the negative pole of power input, between output pin Vout and the negative pole of power input, be serially connected with second source filter capacitor, the second high-frequency filter capacitor respectively.
4. a kind of phones button functional test circuit according to claim 1, is characterized in that: the 4th resistant series that described reometer is also adjustable with between the input pin Vin and output pin Vout of three end integrated voltage stabilizers.
5. a kind of phones button functional test circuit according to claim 1, is characterized in that: the first resistance, the first light emitting diode successively between the input pin Vin of described three end integrated voltage stabilizers and the negative pole of power input.
6. a kind of phones button functional test circuit according to claim 1, is characterized in that: the model of described three end integrated voltage stabilizers is LM317.
7. the measurement jig of the arbitrary described phones button functional test circuit of application rights requirement 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520488740.4U CN204789805U (en) | 2015-07-07 | 2015-07-07 | Earphone button functional test circuit and applied tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520488740.4U CN204789805U (en) | 2015-07-07 | 2015-07-07 | Earphone button functional test circuit and applied tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204789805U true CN204789805U (en) | 2015-11-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520488740.4U Active CN204789805U (en) | 2015-07-07 | 2015-07-07 | Earphone button functional test circuit and applied tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204789805U (en) |
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2015
- 2015-07-07 CN CN201520488740.4U patent/CN204789805U/en active Active
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |