CN203707811U - USB charging circuit of methanol gasoline detector - Google Patents
USB charging circuit of methanol gasoline detector Download PDFInfo
- Publication number
- CN203707811U CN203707811U CN201320793121.7U CN201320793121U CN203707811U CN 203707811 U CN203707811 U CN 203707811U CN 201320793121 U CN201320793121 U CN 201320793121U CN 203707811 U CN203707811 U CN 203707811U
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- capacitor
- ground connection
- diode
- charging circuit
- resistance
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- Expired - Fee Related
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Abstract
The utility model relates to a USB charging circuit of a methanol gasoline detector. An existing USB charging circuit of a methanol gasoline detector is complex in structure, and therefore the existing methanol gasoline detector is big in size, and is not convenient to use and carry, and by using the existing charging circuit, the detection value is not accurate. The USB charging circuit of the methanol gasoline detector comprises an integrated circuit chip LS99701, a triode Q2, a diode D1, a diode D2, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, an MOSFET switch Q1, an inductor L1, a transformer BT and a Zener diode U2. According to the utility model, the integrated circuit chip LS99701 is employed as the control chip, the USB charging circuit is simple in structure and accurate in signal transmission, and the detector is convenient to carry.
Description
Technical field
the utility model relates to a kind of USB charging circuit, especially a kind of USB charging circuit of methanol gasoline detector.
Background technology
The USB charging circuit complex structure of existing methanol gasoline detector, cause like this volume of methanol gasoline detector larger, use and carry all inconveniences, and existing charging circuit signal is very unstable, can not, accurately by signal transmission, cause detected value inaccuracy.
Summary of the invention
The purpose of this utility model is to provide a kind of USB charging circuit of methanol gasoline detector of detected transmission signal stabilization simple in structure.
For solving the problems of the technologies described above, the technical solution of the utility model is: a kind of USB charging circuit of methanol gasoline detector, and its special feature is: described charging circuit comprises integrated circuit (IC) chip LS99701, triode Q2, diode D1, diode D2, capacitor C 1, capacitor C 2, capacitor C 3, capacitor C 5, capacitor C 6, capacitor C 7, capacitor C 8, switch mosfet Q1, inductance L 1, transformer BT and voltage stabilizing didoe U2; 10 pins of described integrated circuit (IC) chip LS99701 access the base stage of triode Q1 by resistance R 8, its 6 pin is by capacitor C 7 ground connection, 1 pin of described integrated circuit (IC) chip LS99701 is by capacitor C 3 ground connection, and its 3 pin is by capacitor C 5 ground connection, 5 pins and the equal ground connection of 7 pins;
The collector electrode of described triode Q1 connects 5V power supply by resistance R 6, the collector electrode of a termination triode Q1 of switch mosfet Q1, and the other end is by diode D2 ground connection; Described inductance L 1 one termination switch mosfet Q1, the other end is by resistance R in parallel 9 and capacitor C 8 ground connection; The positive pole of diode D1 connects inductance L 1, the negative pole access transformer BT positive pole of diode D1;
The negative pole of described voltage stabilizing didoe U2 connects 5V power supply by resistance R 1, its plus earth, and the positive pole of voltage stabilizing didoe U2 connects 5V power supply by resistance R 2, and by resistance R 3 ground connection, capacitor C 1 positive pole connects 5V power supply, its minus earth; Capacitor C 2 positive poles connect power supply, its minus earth.
Compared with prior art, the utlity model has following beneficial effect: the utility model adopts integrated circuit (IC) chip LS99701 as control chip, and it is simple in structure, accurately, detector carries convenient in signal transmission.
Accompanying drawing explanation
Fig. 1 is electrical block diagram of the present utility model.
Embodiment
Below in conjunction with embodiment, the utility model is described in detail.
Referring to Fig. 1, a USB charging circuit for methanol gasoline detector, described charging circuit comprises integrated circuit (IC) chip, triode Q2, diode D1, diode D2, capacitor C 1, capacitor C 2, capacitor C 3, capacitor C 5, capacitor C 6, capacitor C 7, capacitor C 8, switch mosfet Q1, inductance L 1, transformer BT and voltage stabilizing didoe U2; 10 pins of described integrated circuit (IC) chip access the base stage of triode Q1 by resistance R 8, its 6 pin is by capacitor C 7 ground connection, and 1 pin of described integrated circuit (IC) chip is by capacitor C 3 ground connection, and its 3 pin is by capacitor C 5 ground connection, 5 pins and the equal ground connection of 7 pins;
The collector electrode of described triode Q1 connects 5V power supply by resistance R 6, the collector electrode of a termination triode Q1 of switch mosfet Q1, and the other end is by diode D2 ground connection; Described inductance L 1 one termination switch mosfet Q1, the other end is by resistance R in parallel 9 and capacitor C 8 ground connection; The positive pole of diode D1 connects inductance L 1, the negative pole access transformer BT positive pole of diode D1;
The negative pole of voltage stabilizing didoe U2 connects 5V power supply by resistance R 1, its plus earth, and the positive pole of voltage stabilizing didoe U2 connects 5V power supply by resistance R 2, and by resistance R 3 ground connection, capacitor C 1 positive pole connects 5V power supply, its minus earth; Capacitor C 2 positive poles connect power supply, its minus earth.
Claims (1)
1. a USB charging circuit for methanol gasoline detector, is characterized in that: described charging circuit comprises integrated circuit (IC) chip LS99701, triode Q2, diode D1, diode D2, capacitor C 1, capacitor C 2, capacitor C 3, capacitor C 5, capacitor C 6, capacitor C 7, capacitor C 8, switch mosfet Q1, inductance L 1, transformer BT and voltage stabilizing didoe U2; 10 pins of described integrated circuit (IC) chip LS99701 access the base stage of triode Q1 by resistance R 8, its 6 pin is by capacitor C 7 ground connection, 1 pin of described integrated circuit (IC) chip LS99701 is by capacitor C 3 ground connection, and its 3 pin is by capacitor C 5 ground connection, 5 pins and the equal ground connection of 7 pins;
The collector electrode of described triode Q1 connects 5V power supply by resistance R 6, the collector electrode of a termination triode Q1 of switch mosfet Q1, and the other end is by diode D2 ground connection; Described inductance L 1 one termination switch mosfet Q1, the other end is by resistance R in parallel 9 and capacitor C 8 ground connection; The positive pole of diode D1 connects inductance L 1, the negative pole access transformer BT positive pole of diode D1;
The negative pole of described voltage stabilizing didoe U2 connects 5V power supply by resistance R 1, its plus earth, and the positive pole of voltage stabilizing didoe U2 connects 5V power supply by resistance R 2, and by resistance R 3 ground connection, capacitor C 1 positive pole connects 5V power supply, its minus earth; Capacitor C 2 positive poles connect power supply, its minus earth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320793121.7U CN203707811U (en) | 2013-12-06 | 2013-12-06 | USB charging circuit of methanol gasoline detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320793121.7U CN203707811U (en) | 2013-12-06 | 2013-12-06 | USB charging circuit of methanol gasoline detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203707811U true CN203707811U (en) | 2014-07-09 |
Family
ID=51058193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320793121.7U Expired - Fee Related CN203707811U (en) | 2013-12-06 | 2013-12-06 | USB charging circuit of methanol gasoline detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203707811U (en) |
-
2013
- 2013-12-06 CN CN201320793121.7U patent/CN203707811U/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: 20140709 Termination date: 20141206 |
|
| EXPY | Termination of patent right or utility model |