CN107660028B - Single I/O double-lamp control circuit - Google Patents
Single I/O double-lamp control circuit Download PDFInfo
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- CN107660028B CN107660028B CN201711068481.XA CN201711068481A CN107660028B CN 107660028 B CN107660028 B CN 107660028B CN 201711068481 A CN201711068481 A CN 201711068481A CN 107660028 B CN107660028 B CN 107660028B
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
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Abstract
The invention discloses a single I/O double-lamp control circuit, which comprises a Light Emitting Diode (LED) 1, an LED2, a resistor R1, a resistor R2, a resistor R3, a diode V1 and driving triodes V2 and V3, wherein the LED1 is a diode; two homonymous ends of the LED1 and the LED2 are connected, and the other port of the luminous LED1 is respectively connected with the collector electrode of the V2 and the cathode of the V1; the base electrode of the tube V2 is connected with the I/O ports T1-DIS of the singlechip through a resistor R1, and the transmitter of the tube V2 is grounded; the anode of the diode V1 is connected with the base electrode of the diode V3, the collector electrode of the diode V3 is connected with the other port of the LED2, and the emitter electrode of the diode V3 is grounded; the positive electrode of V1 and the base electrode of V3 are also connected with a power supply VCC through a resistor R3. The invention provides a control circuit for controlling two LEDs through a single I/O port, which can control the two LEDs respectively through one I/O port line, can simplify the circuit structure, reduce the circuit consumption and meet the development requirements of energy conservation and emission reduction.
Description
Technical Field
The invention belongs to the technical field of circuit control, and particularly relates to a single I/O double-lamp control circuit.
Background
A Light-Emitting Diode (LED) is a type of semiconductor Diode that converts electrical energy into Light energy. The light emitting diode is composed of a PN junction as a common diode and also has unidirectional conductivity. When a forward voltage is applied to the light emitting diode, holes injected from the P region to the N region and electrons injected from the N region to the P region recombine with the electrons in the N region and the holes in the P region within several micrometers near the PN junction, respectively, generating spontaneous emission fluorescence.
Compared with incandescent bulbs and neon bulbs, the light emitting diode is characterized in that: the operating voltage is very low (some are only a few volts); the working current is very small (some can emit light only by a few tenths of a milliamp); the shock resistance and the earthquake resistance are good, the reliability is high, and the service life is long; the intensity of the luminescence can be conveniently modulated by modulating the intensity of the passing current. Due to its excellent properties, LEDs are widely used in the industries of displays, television daylighting decorations, and lighting.
LED control circuit principle: the LED is driven by the singlechip port, i.e. I/O, and one LED is controlled by one I/O, so that the defects of the method are that the I/O consumption is more or even insufficient when multiple LEDs are required to be driven, and the method is very inconvenient to use.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a single-I/O double-lamp control circuit which controls two LEDs respectively through one I/O port line, can simplify the circuit structure and reduce the circuit consumption.
The aim of the invention is realized by the following technical scheme: a single I/O double-lamp control circuit comprises a light emitting diode LED1, an LED2, a resistor R1, a resistor R2, a resistor R3, a diode V1 and driving triodes V2 and V3;
the two homonymous ends of the light emitting diode LED1 and the LED2 are connected, and the other port of the light emitting diode LED1 is respectively connected with the collector electrode of the driving triode V2 and the cathode of the diode V1; the base electrode of the driving triode V2 is connected with the I/O ports T1-DIS of the singlechip through a resistor R1, and the transmitter of the driving triode V2 is grounded;
the anode of the diode V1 is connected with the base electrode of the driving triode V3, the collector electrode of the driving triode V3 is connected with the other port of the light-emitting diode LED2, and the emitter electrode of the driving triode V3 is grounded;
the positive electrode of the diode V1 and the base electrode of the driving triode V3 are also connected with a power supply VCC through a resistor R3.
Further, two identical terminals connected with the light emitting diode LED1 and the LED2 are also connected with a power supply V-LED through a resistor R2.
Further, the diode V1 is a schottky diode.
The beneficial effects of the invention are as follows: the invention provides a control circuit for controlling two LEDs through a single I/O port, which can control the two LEDs respectively through one I/O port line, can simplify the circuit structure, reduce the circuit consumption and meet the development requirements of energy conservation and emission reduction.
Drawings
FIG. 1 is a circuit diagram of a single I/O dual lamp control circuit of the present invention.
Detailed Description
The technical scheme of the invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, a single I/O dual lamp control circuit includes light emitting diodes LED1, LED2, a resistor R1, a resistor R2, a resistor R3, a diode V1, and driving transistors V2, V3;
the two homonymous ends of the light emitting diode LED1 and the LED2 are connected, and the other port of the light emitting diode LED1 is respectively connected with the collector electrode of the driving triode V2 and the cathode of the diode V1; the base electrode of the driving triode V2 is connected with the I/O ports T1-DIS of the singlechip through a resistor R1, and the transmitter of the driving triode V2 is grounded;
the anode of the diode V1 is connected with the base electrode of the driving triode V3, the collector electrode of the driving triode V3 is connected with the other port of the light-emitting diode LED2, and the emitter electrode of the driving triode V3 is grounded;
the positive electrode of the diode V1 and the base electrode of the driving triode V3 are also connected with a power supply VCC through a resistor R3.
Further, two identical terminals connected with the light emitting diode LED1 and the LED2 are also connected with a power supply V-LED through a resistor R2.
Further, the diode V1 is a schottky diode.
The working principle of the invention is as follows:
1. the LED1 lamp is enabled to be on, and the LED2 lamp is enabled to be off. When t1_dis outputs a high level, V2 is enabled to be turned on, and LED1 lights. The cathode of V1 is at low level, the anode of V1 is the voltage drop of the tube, so that V3 is cut off, and the LED1 is turned off.
2. LED2 lamp is enabled to be on, and LED1 lamp is enabled to be off. When t1_dis outputs a low level, V2 is turned off and LED1 is turned off. And the anode end of the V1 is at a high level through the pull-up resistor R3, the V3 is enabled to be conducted, and the LED2 is lighted.
Those of ordinary skill in the art will recognize that the embodiments described herein are for the purpose of aiding the reader in understanding the principles of the present invention and should be understood that the scope of the invention is not limited to such specific statements and embodiments. Those of ordinary skill in the art can make various other specific modifications and combinations from the teachings of the present disclosure without departing from the spirit thereof, and such modifications and combinations remain within the scope of the present disclosure.
Claims (1)
1. The single-I/O double-lamp control circuit is characterized by comprising a light emitting diode (LED 1) and an LED2, a resistor R1, a resistor R2, a resistor R3, a diode V1 and driving triodes V2 and V3;
the two homonymous ends of the light emitting diode LED1 and the LED2 are connected, and the other port of the light emitting diode LED1 is respectively connected with the collector electrode of the driving triode V2 and the cathode of the diode V1; the base electrode of the driving triode V2 is connected with the I/O ports T1-DIS of the singlechip through a resistor R1, and the transmitter of the driving triode V2 is grounded;
the anode of the diode V1 is connected with the base electrode of the driving triode V3, the collector electrode of the driving triode V3 is connected with the other port of the light-emitting diode LED2, and the emitter electrode of the driving triode V3 is grounded;
the positive electrode of the diode V1 and the base electrode of the driving triode V3 are also connected with a power supply VCC through a resistor R3;
the two homonymous ends of the light emitting diode LED1 and the LED2 are also connected with a power supply V-LED through a resistor R2;
the diode V1 is a schottky diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711068481.XA CN107660028B (en) | 2017-11-03 | 2017-11-03 | Single I/O double-lamp control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711068481.XA CN107660028B (en) | 2017-11-03 | 2017-11-03 | Single I/O double-lamp control circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107660028A CN107660028A (en) | 2018-02-02 |
| CN107660028B true CN107660028B (en) | 2023-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711068481.XA Active CN107660028B (en) | 2017-11-03 | 2017-11-03 | Single I/O double-lamp control circuit |
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| CN (1) | CN107660028B (en) |
Citations (9)
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|---|---|---|---|---|
| CN1658483A (en) * | 2005-03-10 | 2005-08-24 | 上海交通大学 | Isolation voltage regulation circuit regulated by pulse wide of single-chip machine |
| CN201583822U (en) * | 2009-11-27 | 2010-09-15 | 成都前锋电子电器集团股份有限公司 | Single-path PWM bivalve time-sharing-driving control circuit |
| CN103149520A (en) * | 2011-12-07 | 2013-06-12 | 于天 | Transistor graphical recording instrument |
| CN104219817A (en) * | 2013-05-30 | 2014-12-17 | 鸿富锦精密工业（深圳）有限公司 | Infrared light emitting diode driving circuit and remoter |
| CN205040062U (en) * | 2015-08-24 | 2016-02-17 | 柯伟灿 | Two accuse lamps of reputation |
| CN105911924A (en) * | 2016-06-17 | 2016-08-31 | 许江 | Mobile terminal-based intelligent remote control system |
| CN106255258A (en) * | 2016-07-27 | 2016-12-21 | 成都颉隆科技有限公司 | A kind of red-light LED facial film pair transfer drive autocontrol systems |
| CN106329020A (en) * | 2016-08-31 | 2017-01-11 | 成都前锋电子仪器有限责任公司 | Anti-passivation circuit of lithium battery |
| CN107205300A (en) * | 2017-07-05 | 2017-09-26 | 佛山杰致信息科技有限公司 | Led lamp circuit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207321603U (en) * | 2017-11-03 | 2018-05-04 | 成都前锋电子仪器有限责任公司 | A kind of double lamp control circuits of list I/O |
-
2017
- 2017-11-03 CN CN201711068481.XA patent/CN107660028B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1658483A (en) * | 2005-03-10 | 2005-08-24 | 上海交通大学 | Isolation voltage regulation circuit regulated by pulse wide of single-chip machine |
| CN201583822U (en) * | 2009-11-27 | 2010-09-15 | 成都前锋电子电器集团股份有限公司 | Single-path PWM bivalve time-sharing-driving control circuit |
| CN103149520A (en) * | 2011-12-07 | 2013-06-12 | 于天 | Transistor graphical recording instrument |
| CN104219817A (en) * | 2013-05-30 | 2014-12-17 | 鸿富锦精密工业（深圳）有限公司 | Infrared light emitting diode driving circuit and remoter |
| CN205040062U (en) * | 2015-08-24 | 2016-02-17 | 柯伟灿 | Two accuse lamps of reputation |
| CN105911924A (en) * | 2016-06-17 | 2016-08-31 | 许江 | Mobile terminal-based intelligent remote control system |
| CN106255258A (en) * | 2016-07-27 | 2016-12-21 | 成都颉隆科技有限公司 | A kind of red-light LED facial film pair transfer drive autocontrol systems |
| CN106329020A (en) * | 2016-08-31 | 2017-01-11 | 成都前锋电子仪器有限责任公司 | Anti-passivation circuit of lithium battery |
| CN107205300A (en) * | 2017-07-05 | 2017-09-26 | 佛山杰致信息科技有限公司 | Led lamp circuit |
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| Publication number | Publication date |
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| CN107660028A (en) | 2018-02-02 |
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