CN202494892U - Simple relay control circuit - Google Patents
Simple relay control circuit Download PDFInfo
- Publication number
- CN202494892U CN202494892U CN2012200937345U CN201220093734U CN202494892U CN 202494892 U CN202494892 U CN 202494892U CN 2012200937345 U CN2012200937345 U CN 2012200937345U CN 201220093734 U CN201220093734 U CN 201220093734U CN 202494892 U CN202494892 U CN 202494892U
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- Prior art keywords
- control circuit
- relay control
- chip microcomputer
- positive
- simple relay
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- 238000004891 communication Methods 0.000 claims abstract description 7
- 230000006855 networking Effects 0.000 abstract description 4
- 230000005236 sound signal Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
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Abstract
The utility model relates to a simple relay control circuit. The simple relay control circuit is connected with a base of a PNP type triode VT1 through an output terminal of an LM567 phase-locked loop circuit audio tone decoder IC and is connected with a relay K through a collector of the PNP type triode VT1, wherein the collector of the PNP type triode VT1 is further connected with an I/O port of a single-chip microcomputer IC1, an output terminal of the single-chip microcomputer IC1 is connected with an SN75176 communication interface module IC2 to form a 485 data communication circuit, and the simple relay control circuit is connected with an COM port of a PC machine through a 485 bus. The simple relay control circuit can decode 700Hz-2.3kHz audio signals and control turn-on and operation of corresponding electric appliances or machine elements through a relay; after determination is carried out by the single-chip microcomputer, the simple relay control circuit is connected with the PC machine through the 485 bus, and a function of remote systematization networking control is realized; and the simple relay control circuit has advantages of a simple structure, an economical property, high reliability, and the like.
Description
Technical field
The utility model belongs to electronic circuit field, particularly be a kind of simple type control relay circuit.
Background technology
General conventional LM567 does not have serial interface circuit as single audio frequency (several conspicuous to the tens kilo hertzs) frequency-selecting of signal, the relay circuit of decoding scheme control, can not satisfy with PC to connect, and makes and realizes control systemization difficulty relatively.
The utility model content
The purpose of the utility model is to provide a kind of simple type control relay circuit.
The utility model solves the technical scheme that its technical matters adopted: a kind of simple type control relay circuit; Be connected to the base stage of positive-negative-positive triode VT1 by the output terminal of LM567 phase-locked loop circuit ATD IC; Collector by positive-negative-positive triode VT1 is connected to relay K again; The collector of said positive-negative-positive triode VT1 is also connected to the I/O port of single-chip microcomputer IC1; The output terminal of said single-chip microcomputer IC1 is connected to SN75176 communication interface modules IC2 and constitutes 485 datel circuits, and is connected to the COM port of PC by 485 buses.
Said relay K is parallel with diode VD1.
Said positive-negative-positive triode VT1 adopts the C9012 triode.
Through adopting above-mentioned technical scheme; The beneficial effect of the utility model is: the utility model can be deciphered the sound signal of 700Hz-2.3kHz; Connect operation through relay control corresponding electric appliance or parts, after single-chip microcomputer is judged, can be connected in PC through 485 buses; Realize remote system networking control function, have simple in structure, economy, reliability advantages of higher.
Description of drawings
Fig. 1 is the circuit theory diagrams of the utility model.
Embodiment
As shown in Figure 1; A kind of simple type control relay circuit of the utility model; Be connected to the base stage of C9012 triode VT1 by the output terminal of LM567 phase-locked loop circuit ATD IC; Collector by C9012 triode VT1 is connected to relay K again, and said relay K is parallel with diode VD1, and the collector of said C9012 triode VT1 is also connected to the I/O port of single-chip microcomputer IC1; The output terminal of said single-chip microcomputer IC1 is connected to SN75176 communication interface modules IC2 and constitutes 485 datel circuits, and is connected to the COM port of PC by 485 buses.
Under the normal condition, when no input signal was input to the 3rd pin input end of LM567 phase-locked loop circuit ATD IC, the output terminal of LM567 phase-locked loop circuit ATD IC was high level (VDD) again.When the tone signal of input met the centre frequency fo of the inner phase-locked loop of LM567 phase-locked loop circuit ATD IC, its 8th pin output terminal just transferred low level (about 0.2V) to by high level.The C9012 triode VT1 that is connected on its 8th pin is in cut-off state, and relay K is in release conditions.
Have only when the 8th pin of LM567 phase-locked loop circuit ATD IC transfers low level to; Just conducting of C9012 triode VT1; This state is a high level state, and the output signal of triode VT1 also is high level state through the 34th pin I/O end that resistance R 3 current limlitings are input to single-chip microcomputer IC1, after single-chip microcomputer IC1 internal processes calculation process; Form 485 datel circuits by the 1st, 2,3,4 ends of resistance R 4, SN75176 communication interface modules IC2 and the 10th, 11,25 ends of single-chip microcomputer IC1; IC2 sends data message to PC through the SN75176 communication interface modules, is connected to PC COM end through 485 buses, shows the current information state by PC; Can control through PC, realize and the other system networking.Because C9012 triode VT1 conducting makes relay K get electric shunt excitation magnetic and closes, its contact action makes corresponding electric appliance or parts connect operation, realizes remote system networking control function simultaneously.
An above-described preferred embodiment that is merely the utility model can not limit the scope that the utility model is implemented, and every equalization of being done according to the utility model claim changes and decorates, and all should still belong in the scope that the utility model contains.
Claims (3)
1. simple type control relay circuit; It is characterized in that: the base stage that is connected to positive-negative-positive triode VT1 by the output terminal of LM567 phase-locked loop circuit ATD IC; Collector by positive-negative-positive triode VT1 is connected to relay K again; The collector of said positive-negative-positive triode VT1 is also connected to the I/O port of single-chip microcomputer IC1, and the output terminal of said single-chip microcomputer IC1 is connected to SN75176 communication interface modules IC2 and constitutes 485 datel circuits, and is connected to the COM port of PC by 485 buses.
2. simple type control relay circuit according to claim 1 is characterized in that: said relay K is parallel with diode VD1.
3. simple type control relay circuit according to claim 1 and 2 is characterized in that: said positive-negative-positive triode VT1 adopts the C9012 triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200937345U CN202494892U (en) | 2012-03-14 | 2012-03-14 | Simple relay control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200937345U CN202494892U (en) | 2012-03-14 | 2012-03-14 | Simple relay control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202494892U true CN202494892U (en) | 2012-10-17 |
Family
ID=47001112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200937345U Expired - Fee Related CN202494892U (en) | 2012-03-14 | 2012-03-14 | Simple relay control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202494892U (en) |
-
2012
- 2012-03-14 CN CN2012200937345U patent/CN202494892U/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 | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121017 Termination date: 20130314 |