CN203930704U - A kind of AFC (Automatic Fare Collection) device-specific keyboard pcb - Google Patents
A kind of AFC (Automatic Fare Collection) device-specific keyboard pcb Download PDFInfo
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- CN203930704U CN203930704U CN201420277142.8U CN201420277142U CN203930704U CN 203930704 U CN203930704 U CN 203930704U CN 201420277142 U CN201420277142 U CN 201420277142U CN 203930704 U CN203930704 U CN 203930704U
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- pin
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- capacitor
- chip microcomputer
- at89s51 single
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Abstract
The utility model discloses a kind of AFC (Automatic Fare Collection) device-specific keyboard pcb, comprises double-sided PCB board, USB1.1 interface, capacitor C 1, resistance R 1, oscillatory circuit, light emitting diode D1 and AT89S51 single-chip microcomputer; AT89S51 single-chip microcomputer pin 17 connects USB1.1 interface pin 3, and pin 16,18 all connects USB1.1 interface pin 2, and pin 27 connects capacitor C 1 ground connection, and pin 28 is connected with resistance R 1 with capacitor C 1 simultaneously, and pin 29,30 is all connected with oscillatory circuit; USB1.1 interface pin 1 is connected with light emitting diode D1 with resistance R 1 simultaneously, and light emitting diode D1 connects AT89S51 single-chip microcomputer pin 8; AT89S51 single-chip microcomputer pin 15 and USB1.1 interface pin 1,4 all meet chip power MCUVDD, USB1.1 interface pin 4 ground connection; Double-sided PCB board is provided with golden finger.The utility model has not only reduced design and maintenance cost, and has obtained serviceable life significantly extending.
Description
Technical field
The utility model relates to a kind of circuit board, and what be specifically related to is a kind of AFC (Automatic Fare Collection) device-specific keyboard pcb.
Background technology
What existing AFC (Automatic Fare Collection) device-specific keyboard pcb all mainly adopted is disposable COB technical design, then on interface, adopts PS2 interface mode, thereby realizes the human-computer interaction function of equipment.
Yet due to irrational circuit design, existing AFC (Automatic Fare Collection) device-specific keyboard pcb all exists following defect: be 1, disposable COB technical design mode due to what adopt, design outmodedly, so circuit board is shorter serviceable life; 2, due between circuit board and keyboard film, adopt the mode of carbon film to contact, thereby easily because extraneous factor impact causes loose contact, cause keyboard operation to lose efficacy; 3, circuit board can not with usb compatible, can not use having on the equipment of USB interface, thereby cause the use of keyboard limited.
Therefore, be necessary to redesign the keyboard pcb of AFC (Automatic Fare Collection) equipment.
Utility model content
For above-mentioned the deficiencies in the prior art, the utility model provides a kind of AFC (Automatic Fare Collection) device-specific keyboard pcb.
To achieve these goals, the technical solution adopted in the utility model is as follows:
A kind of AFC (Automatic Fare Collection) device-specific keyboard pcb, comprise double-sided PCB board, and all adopt paster mode to be arranged on USB1.1 interface, capacitor C 1, resistance R 1, oscillatory circuit, the light emitting diode D1 on this double-sided PCB board and there is the AT89S51 single-chip microcomputer of 40 pins, wherein:
The pin 17 of described AT89S51 single-chip microcomputer connects the pin 3 of USB1.1 interface, and pin 16,18 all connects the pin 2 of USB1.1 interface, and pin 27 connects capacitor C 1 ground connection, and pin 28 is connected with resistance R 1 with capacitor C 1 simultaneously, and pin 29,30 is all connected with oscillatory circuit;
Described resistance R 1 is all connected with the pin 1 of USB1.1 interface with light emitting diode D1, and light emitting diode D1 also connects the pin 8 of AT89S51 single-chip microcomputer;
The pin 15 of described AT89S51 single-chip microcomputer and the pin of USB1.1 interface 1,4 all meet chip power MCUVDD, and pin 4 ground connection of USB1.1 interface;
On described double-sided PCB board, be also provided with the golden finger for it is connected with keyboard film.
Further, the utility model also comprises the electrochemical capacitor C2 being connected with the pin 1,4 of USB1.1 interface simultaneously.
Again further, the utility model also comprises and is connected to the pin 4 of USB1.1 interface and the capacitor C 3 between chip power MCUVDD, be connected between the pin 15 of AT89S51 single-chip microcomputer and chip power MCUVDD and the capacitor C 4 of ground connection, be connected the also capacitor C 5 of ground connection with the pin 16 of AT89S51 single-chip microcomputer, and be connected to the resistance R 2 between the pin 16 of AT89S51 single-chip microcomputer and the pin 2 of USB1.1 interface.
Specifically, described oscillatory circuit comprises the crystal oscillator B being connected with the pin 29,30 of AT89S51 single-chip microcomputer simultaneously, be connected to the polar capacitor C6 of this crystal oscillator B one end ground connection, and the polar capacitor C7 that is connected to the crystal oscillator B other end ground connection.
Compared with prior art, the utlity model has following beneficial effect:
(1) the utility model circuit design is novel, reasonable, with low cost, long service life.
(2) the utility model adopts the design of double-sided PCB board, AT89S51 single-chip microcomputer and USB1.1 interface, and add electric capacity, resistance as the adjusting components and parts of current/voltage, thereby make to the utlity model has, cabling is simple, electrical loss is low, maintenance cost is low and AT89S51 single-chip microcomputer can be supported the feature of USB, and the components and parts on double-sided PCB board adopt low-power consumption surface mount elements, can effectively increase the deposited copper thickness of double-sided PCB board, thereby strengthen the antijamming capability of whole circuit board.
(3) double-sided PCB board in the utility model is connected with keyboard film by the mode of golden finger, can effectively prevent from losing efficacy because loose contact causes keyboard operation.
(4) the utility model cost performance is high, practical, can compatible USB interface and the equipment of PS2 interface, and therefore, it is with a wide range of applications, and is suitable for applying.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail, and embodiment of the present utility model includes but not limited to the following example.
Embodiment
As shown in Figure 1, the utility model is mainly used in the keyboard aspect of AFC (Automatic Fare Collection) equipment, it comprises double-sided PCB board, and all adopts paster mode to be arranged on light emitting diode D1, capacitor C 1, C3, C4, C5, electrochemical capacitor C2, resistance R 1, R2, oscillatory circuit, the USB1.1 interface on this double-sided PCB board and have the AT89S51 single-chip microcomputer of 40 pins.Between described double-sided PCB board and keyboard film, adopt the mode of golden finger to be connected.
The pin 17 of described AT89S51 single-chip microcomputer meets the pin 3 (USB of USB1.1 interface
+), pin 16,18 all meets the pin 2 (USB of USB1.1 interface
-), pin 27 connects capacitor C 1 ground connection, and pin 28 is connected with resistance R 1 with capacitor C 1 simultaneously, and pin 15 meets chip power MCUVDD.
Described light emitting diode D1 is as the pilot lamp Num Lock of keyboard, and it is connected with the pin 1 (VDD) of USB1.1 interface and the pin 8 of AT89S51 single-chip microcomputer respectively.The pin 4 (VSS) of described USB1.1 interface connects chip power MCUVDD ground connection, and pin 1 is also connected with chip power MCUVDD.
Described resistance R 1 is connected with the pin 1 of USB1.1 interface.Described electrochemical capacitor C2 is connected with the pin 1,4 of USB1.1 interface simultaneously; Capacitor C 3 is connected between the pin 4 and chip power MCUVDD of USB1.1 interface; Capacitor C 4 is connected between the pin 15 of AT89S51 single-chip microcomputer and chip power MCUVDD and ground connection; Capacitor C 5 is connected with the pin 16 of AT89S51 single-chip microcomputer and ground connection.Described resistance R 2 is connected between the pin 16 of AT89S51 single-chip microcomputer and the pin 2 of USB1.1 interface.
Described oscillatory circuit for AT89S51 single-chip microcomputer straight/the stable conversion of A.C. current, specifically, this oscillatory circuit comprises the crystal oscillator B being connected with the pin 29,30 of AT89S51 single-chip microcomputer simultaneously, be connected to the polar capacitor C6 of this crystal oscillator B one end ground connection, and the polar capacitor C7 that is connected to the crystal oscillator B other end ground connection.
In each components and parts of above-mentioned the present embodiment, the size of capacitor C 1, C3, C4, C5 is respectively 0.1,0.01,0.1,0.1 μ F, the size of resistance R 1, R2 is respectively 100,1.5K Ω, and the size of electrochemical capacitor is 10 μ F, and the size of crystal oscillator B is 6MHz.
Main working process of the present utility model is: circuit board is encased in the keyboard of AFC (Automatic Fare Collection) equipment, then the relevant device with USB interface be linked into keyboard and be connected with circuit board, or the existing PS2 of outside employing turns USB interface the equipment with PS2 interface is first changed into the form of USB interface, and then is linked in keyboard.
After equipment access, press " Num Lock " key of lower keyboard, pilot lamp is lit, and then on keyboard, inputs after corresponding button, and equipment can be carried out corresponding operating.
In the time need not using equipment, press " Num Lock " key of lower keyboard, pilot lamp extinguishes, input key no matter how, its input was all lost efficacy, relevant device undo.
Above-described embodiment is only preferably one of implementation of the utility model; should be for not limiting protection domain of the present utility model; all changes of having done under design concept of the present utility model and thought and polishing; it is identical with the utility model in fact, all should be in protection domain of the present utility model.
Claims (4)
1. an AFC (Automatic Fare Collection) device-specific keyboard pcb, it is characterized in that: comprise double-sided PCB board, and all adopt paster mode to be arranged on USB1.1 interface, capacitor C 1, resistance R 1, oscillatory circuit, the light emitting diode D1 on this double-sided PCB board and there is the AT89S51 single-chip microcomputer of 40 pins, wherein:
The pin 17 of described AT89S51 single-chip microcomputer connects the pin 3 of USB1.1 interface, and pin 16,18 all connects the pin 2 of USB1.1 interface, and pin 27 connects capacitor C 1 ground connection, and pin 28 is connected with resistance R 1 with capacitor C 1 simultaneously, and pin 29,30 is all connected with oscillatory circuit;
Described resistance R 1 is all connected with the pin 1 of USB1.1 interface with light emitting diode D1, and light emitting diode D1 also connects the pin 8 of AT89S51 single-chip microcomputer;
The pin 15 of described AT89S51 single-chip microcomputer and the pin of USB1.1 interface 1,4 all meet chip power MCUVDD, and pin 4 ground connection of USB1.1 interface;
On described double-sided PCB board, be also provided with the golden finger for it is connected with keyboard film.
2. a kind of AFC (Automatic Fare Collection) device-specific keyboard pcb according to claim 1, is characterized in that: also comprise the electrochemical capacitor C2 being connected with the pin 1,4 of USB1.1 interface simultaneously.
3. a kind of AFC (Automatic Fare Collection) device-specific keyboard pcb according to claim 2, it is characterized in that: also comprise and be connected to the pin 4 of USB1.1 interface and the capacitor C 3 between chip power MCUVDD, be connected between the pin 15 of AT89S51 single-chip microcomputer and chip power MCUVDD and the capacitor C 4 of ground connection, be connected the also capacitor C 5 of ground connection with the pin 16 of AT89S51 single-chip microcomputer, and be connected to the resistance R 2 between the pin 16 of AT89S51 single-chip microcomputer and the pin 2 of USB1.1 interface.
4. a kind of AFC (Automatic Fare Collection) device-specific keyboard pcb according to claim 3, it is characterized in that: described oscillatory circuit comprises the crystal oscillator B being connected with the pin 29,30 of AT89S51 single-chip microcomputer simultaneously, be connected to the polar capacitor C6 of this crystal oscillator B one end ground connection, and the polar capacitor C7 that is connected to the crystal oscillator B other end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420277142.8U CN203930704U (en) | 2014-05-22 | 2014-05-22 | A kind of AFC (Automatic Fare Collection) device-specific keyboard pcb |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420277142.8U CN203930704U (en) | 2014-05-22 | 2014-05-22 | A kind of AFC (Automatic Fare Collection) device-specific keyboard pcb |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203930704U true CN203930704U (en) | 2014-11-05 |
Family
ID=51826484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420277142.8U Expired - Fee Related CN203930704U (en) | 2014-05-22 | 2014-05-22 | A kind of AFC (Automatic Fare Collection) device-specific keyboard pcb |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203930704U (en) |
-
2014
- 2014-05-22 CN CN201420277142.8U patent/CN203930704U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141105 Termination date: 20150522 |
|
| EXPY | Termination of patent right or utility model |