CN204304994U - Miniature short message sender - Google Patents
Miniature short message sender Download PDFInfo
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- CN204304994U CN204304994U CN201420775892.8U CN201420775892U CN204304994U CN 204304994 U CN204304994 U CN 204304994U CN 201420775892 U CN201420775892 U CN 201420775892U CN 204304994 U CN204304994 U CN 204304994U
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- resistance
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- ttl
- usb
- short message
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Abstract
The utility model discloses a kind of miniature short message sender, comprise SIM900A chip, 5V/3.3VTTL electric level interface, 5V power interface and USB-TTL module, two outputs of described USB-TTL module are connected with SIM900A chip with 5V power interface respectively by 5V/3.3VTTL electric level interface, does described USB-TTL module comprise 5V? TTL match circuit and 3.3V? TTL match circuit.The technical solution of the utility model, by arranging USB-TTL module, is all converted to USB interface by communication and power interface, the external circuit of complexity is integrated in inside modules, and provide general USB interface.Thus reach and use simple and that cost is low object.
Description
Technical field
The utility model relates to electronic circuit field, particularly, relates to a kind of miniature short message sender.
Background technology
The signal and communication of SMS transmission module traditional in the market and Power supply are two different interfaces, and one is the RS232 serial ports of standard, and another is 3 core train hair style supply sockets of standard.Most computer does not all have RS232 interface on the market at present, and this just requires that client is while use conventional module, needs a collocation serial converter in addition.And traditional powering mode to be external power supply power, this certainly will require that client also will arrange in pairs or groups a power supply changeover device and corresponding upstream power supply interface again.This mode not only cost of idleness, and use and bother very much,
Utility model content
The purpose of this utility model is, for the problems referred to above, proposes a kind of miniature short message sender, to realize using simple and that cost is low advantage.
For achieving the above object, the technical solution adopted in the utility model is:
A kind of miniature short message sender, comprise SIM900A chip, 5V/3.3VTTL electric level interface, 5V power interface and USB-TTL module, two outputs of described USB-TTL module are connected with SIM900A chip with 5V power interface respectively by 5V/3.3VTTL electric level interface, and described USB-TTL module comprises 5V TTL match circuit and 3.3V TTL match circuit.
Further, described 5V TTL match circuit comprises resistance R2, FET Q2, resistance R4 and resistance R9, the source series of described resistance R2 and FET Q2, the drain electrode of series resistance R4 between the grid of described FET Q2 and the drain electrode of FET Q2, described FET Q2 and SIM900A chip chamber series resistance R9.
Further, the resistance of described resistance R9 is 1K Ω.
Further, described 3.3V TTL match circuit comprises resistance R1, FET Q1, resistance R3 and resistance R8, the source series of described resistance R1 and FET Q1, the drain electrode of series resistance R3 between the grid of described FET Q1 and the drain electrode of FET Q1, described FET Q1 and SIM900A chip chamber series resistance R8.
Further, the resistance of described resistance R8 is 1K Ω.
Further, the output connecting triode T1 of described SIM900A chip, series resistance R24 between the output of described SIM900A chip and the base stage of triode T1, the colelctor electrode of described triode T1 is connected light emitting diode D6 and resistance R10, and the negative electrode of described light emitting diode D6 is connected with the colelctor electrode of triode T1.
The technical solution of the utility model has following beneficial effect:
The technical solution of the utility model, by arranging USB-TTL module, is all converted to USB interface by communication and power interface, the external circuit of complexity is integrated in inside modules, and provide general USB interface.Thus reach and use simple and that cost is low object.
Accompanying drawing explanation
Fig. 1 is the electronic circuitry of the miniature short message sender described in the utility model embodiment.
Detailed description of the invention
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described, should be appreciated that preferred embodiment described herein is only for instruction and explanation of the utility model, and be not used in restriction the utility model.
As shown in Figure 1, a kind of miniature short message sender, comprise SIM900A chip, 5V/3.3VTTL electric level interface, 5V power interface and USB-TTL module, two outputs of USB-TTL module are connected with SIM900A chip with 5V power interface respectively by 5V/3.3VTTL electric level interface, and USB-TTL module comprises 5V TTL match circuit and 3.3V TTL match circuit.
5V TTL match circuit comprises resistance R2, FET Q2, resistance R4 and resistance R9, the source series of resistance R2 and FET Q2, the drain electrode of series resistance R4 between the grid of FET Q2 and the drain electrode of FET Q2, FET Q2 and SIM900A chip chamber series resistance R9.The resistance of resistance R9 is 1K Ω.3.3V TTL match circuit comprises resistance R1, FET Q1, resistance R3 and resistance R8, the source series of described resistance R1 and FET Q1, the drain electrode of series resistance R3 between the grid of FET Q1 and the drain electrode of FET Q1, FET Q1 and SIM900A chip chamber series resistance R8.The resistance of resistance R8 is 1K Ω.The output connecting triode T1 of SIM900A chip, series resistance R24 between the output of SIM900A chip and the base stage of triode T1, the negative electrode of light emitting diode D6 and resistance R10, light emitting diode D6 that the colelctor electrode of triode T1 is connected is connected with the colelctor electrode of triode T1.
The signal emission port of SIM900A chip connects antenna, arranges power circuit in USB-TTL module, the 5V power supply directly using USB interface is SIM900A chip power supply.
USB-TTL module is by 5V TTL match circuit, and the communication realizing SIM900A chip connects, and the information after chip process, converts TTL signal to, is back to USB-TTL module, realizes USB communication via 5V TTL match circuit; USB-TTL module contains an independently road 5V voltage source, can be SIM900A circuit and carries out supply of electric power, realize USB and power.
To integrate with on one piece of circuit board with USB-TTL module and SIM900A, and USB integral type can be realized and power and communication function.
Utilizing this miniature short message sender, when not using any external equipment, nearly all computer can be applied; Save cost, easy for installation, easy to maintenance.
Last it is noted that the foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, although be described in detail the utility model with reference to previous embodiment, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (6)
1. a miniature short message sender, it is characterized in that, comprise SIM900A chip, 5V/3.3VTTL electric level interface, 5V power interface and USB-TTL module, two outputs of described USB-TTL module are connected with SIM900A chip with 5V power interface respectively by 5V/3.3VTTL electric level interface, and described USB-TTL module comprises 5V TTL match circuit and 3.3V TTL match circuit.
2. miniature short message sender according to claim 1, it is characterized in that, described 5V TTL match circuit comprises resistance R2, FET Q2, resistance R4 and resistance R9, the source series of described resistance R2 and FET Q2, the drain electrode of series resistance R4 between the grid of described FET Q2 and the drain electrode of FET Q2, described FET Q2 and SIM900A chip chamber series resistance R9.
3. miniature short message sender according to claim 2, is characterized in that, the resistance of described resistance R9 is 1K Ω.
4. the miniature short message sender according to claim 1,2 or 3, it is characterized in that, described 3.3V TTL match circuit comprises resistance R1, FET Q1, resistance R3 and resistance R8, the source series of described resistance R1 and FET Q1, the drain electrode of series resistance R3 between the grid of described FET Q1 and the drain electrode of FET Q1, described FET Q1 and SIM900A chip chamber series resistance R8.
5. miniature short message sender according to claim 4, is characterized in that, the resistance of described resistance R8 is 1K Ω.
6. miniature short message sender according to claim 4, it is characterized in that, the output connecting triode T1 of described SIM900A chip, series resistance R24 between the output of described SIM900A chip and the base stage of triode T1, the colelctor electrode of described triode T1 is connected light emitting diode D6 and resistance R10, and the negative electrode of described light emitting diode D6 is connected with the colelctor electrode of triode T1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420775892.8U CN204304994U (en) | 2014-12-11 | 2014-12-11 | Miniature short message sender |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420775892.8U CN204304994U (en) | 2014-12-11 | 2014-12-11 | Miniature short message sender |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204304994U true CN204304994U (en) | 2015-04-29 |
Family
ID=53110498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420775892.8U Expired - Fee Related CN204304994U (en) | 2014-12-11 | 2014-12-11 | Miniature short message sender |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204304994U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108413197A (en) * | 2018-05-08 | 2018-08-17 | 臧博琦 | A kind of power transmission line intelligent active external force damage prevention device |
-
2014
- 2014-12-11 CN CN201420775892.8U patent/CN204304994U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108413197A (en) * | 2018-05-08 | 2018-08-17 | 臧博琦 | A kind of power transmission line intelligent active external force damage prevention device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200309 Address after: 214000 1-1201 Fengbin Road, Liangxi District, Wuxi City, Jiangsu Province Patentee after: Jiangsu Andersen Technology Co., Ltd Address before: 501 room 214000, science and Technology Pioneer Park, 7 Changjiang Road, Wuxi New District, Jiangsu, China Patentee before: TuoNeng Automation Technology (Wuxi) Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150429 Termination date: 20201211 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |