CN204719126U - A kind of voltage detecting circuit - Google Patents
A kind of voltage detecting circuit Download PDFInfo
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- CN204719126U CN204719126U CN201520460851.4U CN201520460851U CN204719126U CN 204719126 U CN204719126 U CN 204719126U CN 201520460851 U CN201520460851 U CN 201520460851U CN 204719126 U CN204719126 U CN 204719126U
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- resistance
- triode
- chip microcomputer
- voltage detecting
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Abstract
The utility model discloses a kind of voltage detecting circuit, comprise resistance R1, electric capacity C1, triode VT1, triode VT2, resistance R1, resistance R2, resistance R3 and single-chip microcomputer U1, resistance R1 one end connects the P1.1 pin of single-chip microcomputer U1, the resistance R1 other end connects direct earth capacitance C1 and triode VT1 base stage respectively, triode VT1 collector is contact resistance R2 and triode VT2 base stage respectively, triode VT2 emitter is the contact resistance R2 other end and power supply VCC, triode VT2 collector contact resistance R3 respectively.The utility model voltage detecting circuit utilizes the A/D converter in single-chip microcomputer, realizes voltage detecting function, and circuit structure is simple, and use electronic component few, volume is little, and cost is low, is applicable to very much promoting the use of.
Description
Technical field
The utility model relates to a kind of testing circuit, specifically a kind of voltage detecting circuit.
Background technology
The control center that single-chip microcomputer is commonly used as a kind of control field, its security is directly connected to the stability of control system, the safety of single-chip microcomputer is directly connected to for electrical stability, more existing voltage detecting circuits mostly adopt special integrated chip or adopt the form of electric resistance partial pressure making alive comparer, circuit structure is all very complicated, and cost is higher.
Utility model content
The purpose of this utility model is to provide a kind of voltage detecting circuit being applied to single-chip microcomputer, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of voltage detecting circuit, comprise resistance R1, electric capacity C1, triode VT1, triode VT2, resistance R1, resistance R2, resistance R3 and single-chip microcomputer U1, described resistance R1 one end connects the P1.1 pin of single-chip microcomputer U1, the resistance R1 other end connects direct earth capacitance C1 and triode VT1 base stage respectively, triode VT1 collector is contact resistance R2 and triode VT2 base stage respectively, triode VT2 emitter is the contact resistance R2 other end and power supply VCC respectively, triode VT2 collector contact resistance R3, the P1.2 pin of resistance R3 other end difference contact resistance R4 and single-chip microcomputer U1, resistance R4 other end connecting triode VT1 emitter ground connection, described single-chip microcomputer U1 model is MSP430.
As the utility model further scheme: described power supply VCC voltage is 3.3V.
Compared with prior art, the beneficial effects of the utility model are: the utility model voltage detecting circuit utilizes the A/D converter in single-chip microcomputer, realizes voltage detecting function, circuit structure is simple, and use electronic component few, volume is little, cost is low, is applicable to very much promoting the use of.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of voltage detecting circuit.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, in the utility model embodiment, a kind of voltage detecting circuit, comprise resistance R1, electric capacity C1, triode VT1, triode VT2, resistance R1, resistance R2, resistance R3 and single-chip microcomputer U1, resistance R1 one end connects the P1.1 pin of single-chip microcomputer U1, the resistance R1 other end connects direct earth capacitance C1 and triode VT1 base stage respectively, triode VT1 collector is contact resistance R2 and triode VT2 base stage respectively, triode VT2 emitter is the contact resistance R2 other end and power supply VCC respectively, triode VT2 collector contact resistance R3, the P1.2 pin of resistance R3 other end difference contact resistance R4 and single-chip microcomputer U1, resistance R4 other end connecting triode VT1 emitter ground connection, single-chip microcomputer U1 model is MSP430.
Power supply VCC voltage is 3.3V.
Principle of work of the present utility model is: refer to Fig. 1, when the P1.1 pin of chip U1 exports high level, triode VT1 and triode VT2 conducting, the pressure drop of power supply VCC on resistance R4 enters A/D converter in MSP430 sheet by the P1.2 pin of single-chip microcomputer U1, now the P1.2 pin of single-chip microcomputer U1 makes the input channel of ADC, voltage signal is made comparisons with the safe voltage thresholds of setting after A/D conversion, thus judges that whether power supply VCC voltage is normal, and power supply VCC returns single-chip microcomputer and powers.
To those skilled in the art, obvious the utility model is not limited to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present utility model or essential characteristic, can realize the utility model in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the utility model.Any Reference numeral in claim should be considered as the claim involved by limiting.
In addition, be to be understood that, although this instructions is described according to embodiment, but not each embodiment only comprises an independently technical scheme, this narrating mode of instructions is only for clarity sake, those skilled in the art should by instructions integrally, and the technical scheme in each embodiment also through appropriately combined, can form other embodiments that it will be appreciated by those skilled in the art that.
Claims (2)
1. a voltage detecting circuit, comprise resistance R1, electric capacity C1, triode VT1, triode VT2, resistance R1, resistance R2, resistance R3 and single-chip microcomputer U1, it is characterized in that, described resistance R1 one end connects the P1.1 pin of single-chip microcomputer U1, the resistance R1 other end connects direct earth capacitance C1 and triode VT1 base stage respectively, triode VT1 collector is contact resistance R2 and triode VT2 base stage respectively, triode VT2 emitter is the contact resistance R2 other end and power supply VCC respectively, triode VT2 collector contact resistance R3, the P1.2 pin of resistance R3 other end difference contact resistance R4 and single-chip microcomputer U1, resistance R4 other end connecting triode VT1 emitter ground connection, described single-chip microcomputer U1 model is MSP430.
2. voltage detecting circuit according to claim 1, is characterized in that, described power supply VCC voltage is 3.3V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520460851.4U CN204719126U (en) | 2015-06-24 | 2015-06-24 | A kind of voltage detecting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520460851.4U CN204719126U (en) | 2015-06-24 | 2015-06-24 | A kind of voltage detecting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204719126U true CN204719126U (en) | 2015-10-21 |
Family
ID=54318115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520460851.4U Expired - Fee Related CN204719126U (en) | 2015-06-24 | 2015-06-24 | A kind of voltage detecting circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204719126U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107507385A (en) * | 2017-08-22 | 2017-12-22 | 广州绿美环保科技有限公司 | Energy-conserving and environment-protective system |
-
2015
- 2015-06-24 CN CN201520460851.4U patent/CN204719126U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107507385A (en) * | 2017-08-22 | 2017-12-22 | 广州绿美环保科技有限公司 | Energy-conserving and environment-protective system |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151021 Termination date: 20160624 |