CN110621097A - Light-emitting circuit for railway signal track circuit simulation box - Google Patents
Light-emitting circuit for railway signal track circuit simulation box Download PDFInfo
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- CN110621097A CN110621097A CN201810629763.0A CN201810629763A CN110621097A CN 110621097 A CN110621097 A CN 110621097A CN 201810629763 A CN201810629763 A CN 201810629763A CN 110621097 A CN110621097 A CN 110621097A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
The invention discloses a light-emitting circuit for a railway signal track circuit simulation box, which comprises a transformer T and is characterized in that two ends of a secondary coil L2 of the transformer T are respectively and electrically connected with one end of a capacitor C1 and one end of a capacitor C2, the other ends of the capacitor C1 and the capacitor C2 are respectively and electrically connected with one end of a fuse FU1 and one end of a fuse FU2, the other ends of the fuse FU1 and the fuse FU2 are respectively and electrically connected with first ends of rectifiers VD 1-VD 4, and two ends of a secondary coil L2 of the transformer T are respectively and electrically connected with a second end and a fourth end of the rectifiers VD 1-VD 4. The voltage of the secondary coil L2 of the transformer T is rectified by the bridge rectifier VD 1-VD 4 to drive the light emitting diode D3 and the light emitting diode D4 to light, the PNP type triode Q5 can flow current to the slide rheostat R12, then the current flows to the ground to protect the main circuit, and the main circuit is simple in structure.
Description
Technical Field
The invention relates to the technical field of railway signals, in particular to a light-emitting circuit for a railway signal track circuit simulation box.
Background
The railway signal is also called as a railway signal, and has the functions of ensuring the running safety of the train, effectively improving the railway transportation efficiency, reducing the transportation cost and greatly improving the labor condition of the traveling personnel; therefore, railway signal equipment is key equipment for organizing and commanding train operation, ensuring driving safety, improving transportation efficiency, transmitting driving information and improving labor conditions of driving personnel, a railway signal common light-emitting circuit is taken as signal indication at present, but the existing light-emitting circuit is complex in structure and does not have the function of a protection circuit, and therefore when voltage is unstable, the circuit is easy to damage, and therefore the light-emitting circuit for the railway signal track circuit simulation box is provided and used for solving the problems.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a light-emitting circuit for a railway signal track circuit simulation box.
The invention provides a light-emitting circuit for a railway signal track circuit simulation box, which comprises a transformer T, wherein two ends of a secondary coil L2 of the transformer T are respectively and electrically connected with one end of a capacitor C1 and one end of a capacitor C2, the other ends of the capacitor C1 and the capacitor C2 are respectively and electrically connected with one end of a fuse FU1 and one end of a fuse FU2, the other ends of the fuse FU1 and the fuse FU2 are respectively and electrically connected with first ends of rectifiers VD 1-VD 4, two ends of a secondary coil L2 of the transformer T are respectively and electrically connected with second ends and fourth ends of rectifiers VD 1-VD 4, third ends of the rectifiers VD 1-VD 4 are respectively and electrically connected with one end of a capacitor C3, a sliding end of a sliding rheostat R1, one end of a resistor R9, a negative electrode of a diode D2 and a base electrode of a PNP triode Q2, one end of the sliding rheostat 1 is electrically connected with a positive electrode of, the other end of the resistor R9 is electrically connected with an emitter of a PNP type triode Q1, a base of the PNP type triode Q1 is electrically connected with one end of a slide rheostat R1, collectors of the PNP type triode Q1 are respectively electrically connected with one end of a resistor R2 and a base of an NPN type triode Q4, a collector of the NPN type triode Q4 is electrically connected with one end of a resistor R3, the other end of the resistor R3 is electrically connected with a collector of the PNP type triode Q2, emitters of the PNP type triode Q2 are respectively electrically connected with one end of a resistor R4 and an emitter of the PNP type triode Q3, the other end of the resistor R4 is electrically connected with one end of a resistor R5, a base of the PNP type triode Q3 is electrically connected with one end of an adjustable capacitor C4, the other end of the adjustable capacitor C4 is electrically connected with one end of a resistor R8, the other end of the resistor R8 and the collectors of the, two ends of the switch S1 are electrically connected with a sliding end of a sliding rheostat R7, a cathode of a diode D3 and an anode of a diode D4 respectively, one ends of the sliding rheostat R7, the cathode of the diode D3 and the anode of the diode D4 are electrically connected with the same capacitor C5, one end of the sliding rheostat R7 is electrically connected with an anode of a diode D3 and a cathode of a diode D4 respectively, the anode of the diode D2 is electrically connected with one end of a resistor R6, the other end of the resistor R6 is electrically connected with a collector of a PNP triode Q3, fourth ends of the rectifiers VD 1-VD 4 are electrically connected with two ends of an adjustable capacitor C8, one end of the adjustable capacitor C8 is electrically connected with one end of a resistor R14, the other end of the resistor R14 is electrically connected with an emitter of a PNP triode Q5, and the collector of the PNP triode Q5 is electrically connected with one end of a resistor R13, the base of the PNP triode Q5 is electrically connected with the sliding end of a sliding rheostat R12, one end of the sliding rheostat R12 is electrically connected with the sliding end of the sliding rheostat R11, the anode of a diode D5 and one end of a capacitor C7 respectively, the cathode of the diode D5 and one end of the sliding rheostat R7 are electrically connected with one end of the same capacitor C6, and the other end of the capacitor C6 is electrically connected with one end of a resistor R10 and one end of a resistor R15 respectively and is connected with a ground wire.
Preferably, the resistances of the resistor R2, the resistor R3, the resistor R4, the resistor R5, the resistor R6, the resistor R8, the resistor R9, the resistor R10, the resistor R13, the resistor R14 and the resistor R15 are 5800 ohms, 510 ohms, 1000 ohms, 500 ohms, 100 ohms, 1000 ohms, 2000 ohms, 3000 ohms and 1500 ohms respectively, and the resistances of the sliding varistor R1, the sliding varistor R7, the sliding varistor R11 and the sliding varistor R12 are all in the range of 1000 ohms to 5000 ohms.
Preferably, the capacitance values of the capacitor C1, the capacitor C2, the capacitor C3, the capacitor C5, the capacitor C6 and the capacitor C7 are 0.1PF, 20PF, 30PF and 55PF respectively, the capacitors C4 and C8 are adjustable capacitors, and the capacitance values are all 1PF to 50 PF.
Preferably, the capacity of fuse FU1 and fuse FU2 are both 10A.
Preferably, the diode D3 and the diode D4 are both light emitting diodes, and the light source emitted by the diode D3 is yellow light, and the light source emitted by the diode D4 is green light.
Preferably, the rectifiers VD 1-VD 4 are bridge rectifiers and are 2KBP 08M.
Preferably, the other end of the resistor R10, the other end of the resistor R15, the other end of the resistor R13, the other end of the capacitor C7, the cathode of the diode D1, the other end of the resistor R2, the emitter of the NPN transistor Q4, the other end of the resistor R5, and the other end of the resistor R8 are all electrically grounded.
Preferably, the diode D1 and the diode D5 are both zener diodes.
In the invention, voltage is transmitted to a capacitor C1 and a capacitor C2 through a secondary coil L2 of a transformer T, current can flow to bridge rectifiers VD 1-VD 4 through a capacitor C1 and a capacitor C2, current is changed from alternating current to direct current through the bridge rectifiers VD 1-VD 4 after rectification, the direct current flows from the third ends of the bridge rectifiers VD 1-VD 4 and then flows to the sliding end of a sliding rheostat R1, one end of a resistor R9, the base of a PNP type triode Q2, the current passing through the PNP type triode Q2 flows to the emitter of the PNP type triode Q3, flows from the base and the collector of the PNP type triode Q3, flows to the sliding end of the sliding rheostat R7 through a switch S1, and the current flows to the anode of a light-emitting diode D7 and the cathode of the diode D7 after passing through the sliding rheostat R7, so that the light-emitting diode D7 and the sliding rheostat D7 are lighted, the sliding rheostat R7, the sliding, The PNP triode Q1, the resistor R3, the NPN triode Q4, the resistor R4, the resistor R5, the adjustable capacitor C4, and the resistor R8 all distribute the current and voltage flowing from the bridge rectifiers VD1 to VD4, the distributed currents are all grounded, so that the current and voltage of the led D3 and the led D4 are not overloaded, the fourth terminals of the bridge rectifiers VD1 to VD4 are connected to the two ends of the adjustable capacitor C4, so the current flows to one end of the resistor R4 and one end of the resistor R4 through the negative electrode of the adjustable capacitor C4, after the resistor R4 receives power, the current flows to the sliding end of the resistor R4 and the sliding end of the sliding varistor R4 through the collector and the base of the PNP triode Q4, and the sliding end of the sliding varistor R4, and the positive electrode of the diode D4 are grounded through the sliding varistor R4, at this time, the sliding varistor R4 can divide the voltage of the diode D4, the resistor R4, the capacitor C, the main circuit can be protected at the moment, the voltage of the secondary coil L2 of the transformer T can drive the light emitting diode D3 and the light emitting diode D4 to light after being rectified by the bridge rectifier VD 1-VD 4, the current can flow to the slide rheostat R12 through the PNP type triode Q5, then the current flows to the ground, the main circuit is protected, and the main circuit is simple in structure.
Drawings
FIG. 1 is a front view of the general circuit structure of a light-emitting circuit for a railway signal track circuit simulation box according to the present invention;
FIG. 2 is a front view of a main circuit structure of a light-emitting circuit for a railway signal track circuit simulation box according to the present invention;
fig. 3 is a front view of a protection circuit structure of a light-emitting circuit for a railway signal track circuit simulation box according to the present invention.
Detailed Description
The present invention will be further illustrated with reference to the following specific examples.
Examples
The embodiment provides a light-emitting circuit for a railway signal track circuit simulation box, which comprises a transformer T, wherein two ends of a secondary coil L2 of the transformer T are respectively and electrically connected with one end of a capacitor C1 and one end of a capacitor C2, the other ends of the capacitor C1 and the capacitor C2 are respectively and electrically connected with one end of a fuse FU1 and one end of a fuse FU2, the other ends of the fuse FU1 and the fuse FU2 are respectively and electrically connected with first ends of rectifiers VD 1-VD 4, two ends of a secondary coil L2 of the transformer T are respectively and electrically connected with second ends and fourth ends of rectifiers 58VD 24-VD 4, a third end of the rectifiers 1-63VD 28 is respectively and electrically connected with one end of a capacitor C3, a sliding end of a sliding rheostat R1, one end of a resistor R9, a negative electrode of a diode D2 and a base electrode of a PNP triode Q2, one end of the sliding rheostat R1 is electrically connected with a positive electrode of a diode D1, and the other end, the base of PNP triode Q1 is electrically connected with one end of sliding rheostat R1, the collector of PNP triode Q1 is electrically connected with one end of resistor R2 and the base of NPN triode Q4 respectively, the collector of NPN triode Q4 is electrically connected with one end of resistor R3, the other end of resistor R3 is electrically connected with the collector of PNP triode Q2, the emitter of PNP triode Q2 is electrically connected with one end of resistor R4 and the emitter of PNP triode Q3 respectively, the other end of resistor R4 is electrically connected with one end of resistor R5, the base of PNP triode Q3 is electrically connected with one end of adjustable capacitor C4, the other end of adjustable capacitor C4 is electrically connected with one end of resistor R8, the other end of resistor R8 and the collector of PNP triode Q3 are electrically connected with the two ends of switch S1, the two ends of switch S1 are electrically connected with the sliding end of sliding rheostat R7, the cathode of diode D3 and the anode of diode 4, the sliding end of the sliding rheostat R7, the cathode of the diode D3 and the anode of the diode D4 are electrically connected with the same capacitor C5, one end of the sliding rheostat R7 is electrically connected with the anode of the diode D3 and the cathode of the diode D4 respectively, the anode of the diode D2 is electrically connected with one end of a resistor R6, the other end of the resistor R6 is electrically connected with the collector of the PNP triode Q3, the fourth ends of the rectifiers VD 1-VD 4 are electrically connected with two ends of an adjustable capacitor C8, one end of an adjustable capacitor C8 is electrically connected with one end of a resistor R14, the other end of the resistor R14 is electrically connected with the emitter of the PNP triode Q5, the collector of the PNP triode Q5 is electrically connected with one end of a resistor R13, the base of the PNP triode Q5 is electrically connected with the sliding end of the sliding rheostat R12, one end of the sliding rheostat R12 is electrically connected with the sliding end of the sliding rheostat R12, the, the cathode of the diode D5 and one end of the sliding varistor R7 are electrically connected with one end of the same capacitor C6, the other end of the capacitor C6 is electrically connected with one end of a resistor R10 and one end of a resistor R15 which are connected with a ground wire respectively, the resistors R2, R3, R4, R5, R6, R8, R9 and R9 have the resistance values of 5800 ohm, 510 ohm, 1000 ohm, 500 ohm, 100 ohm, 1000 ohm, 2000 ohm, 3000 ohm and 1500 ohm respectively, the resistance ranges of the sliding varistor R9, the sliding varistor R9 and the sliding varistor R9 are all 1000 ohm-5000 ohm, the capacitance values of the capacitor C9, the capacitance values of the capacitor C9 and the capacitance values of the capacitor C9 are all 0.1, PF 30, PF and PF 20, the adjustable capacitance values of the capacitor C9, PF and PF 72, the capacitance values are all 1 PF-50 PF, the capacities of the fuse FU1 and the fuse FU2 are all 10A, the diode D3 and the diode D4 are both light emitting diodes, the light source emitted by the diode D3 is yellow light, the light source emitted by the diode D4 is green light, the rectifiers VD 1-VD 4 are bridge rectifiers, the model is 2KBP08M, the other end of the resistor R10, the other end of the resistor R15, the other end of the resistor R13, the other end of the capacitor C7, the negative electrode of the diode D1, the other end of the resistor R2, the emitter of the NPN type triode Q4, the other end of the resistor R5 and the other end of the resistor R8 are all electrically grounded, and the diode D1 and the diode D5.
In this embodiment, the voltage is transmitted to the capacitor C1 and the capacitor C2 through the secondary coil L2 of the transformer T, the current can flow to the bridge rectifiers VD1 to VD4 through the capacitor C1 and the capacitor C2, the rectified current is changed from ac to dc through the bridge rectifiers VD1 to VD4, the dc flows out from the third terminals of the bridge rectifiers VD1 to VD4 to flow to the sliding terminal of the sliding rheostat R1, one terminal of the resistor R9, the base of the PNP triode Q2, the current passing through the PNP triode Q2 flows to the emitter of the PNP triode Q3, the current flows out from the collector of the PNP triode Q3 to one terminal of the sliding rheostat R7 through the switch S1, flows to the anode of the light emitting diode D3 and the cathode of the diode D4 through the sliding rheostat R7, so that the light emitting diode D3 and the light emitting diode D4 light on, the current of the sliding rheostat R1 flows to the anode of the zener diode D1, after the resistor R9 receives power, current flows to the anode of the PNP triode Q1, after the resistor R3 receives power, current flows to the anode of the NPN triode Q4, after the resistor R4 receives power, current flows to the resistor R5, after the adjustable capacitor C4 receives power, current flows to the resistor R8, since the cathode of the zener diode D1, the other end of the resistor R2, the emitter of the NPN triode Q4, the other end of the resistor R5, and the other end of the resistor R8 are all grounded, current and voltage flowing out from the bridge rectifiers VD1 to VD4 can be dispersed, the dispersed current flows to the ground line, so that the current and voltage of the led D3 and the led D4 are not overloaded, the fourth terminals of the bridge rectifiers VD1 to VD4 are connected to the two ends of the adjustable capacitor C9, so that current flows to one end of the resistor R14 and one end of the resistor R10 through the cathode of the adjustable capacitor C8, and then to the resistor R14, the emitter of the PNP transistor Q5 flows to one end of the resistor R13 and the sliding end of the sliding resistor R12, respectively, and flows to the anode of the diode D5 after the sliding resistor R12 receives power, at this time, the sliding resistor R11 can perform voltage division protection on the diode D5, and one ends of the resistor R13, the capacitor C7, the diode D5 and the resistor R15 are all grounded, so that the main circuit can be protected, and the main circuit has a simple structure.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. A light-emitting circuit for a railway signal track circuit simulation box comprises a transformer T, and is characterized in that two ends of a secondary coil L2 of the transformer T are respectively and electrically connected with one end of a capacitor C1 and one end of a capacitor C2, the other ends of the capacitor C1 and the capacitor C2 are respectively and electrically connected with one end of a fuse FU1 and one end of a fuse FU2, the other ends of the fuse FU1 and the fuse FU2 are respectively and electrically connected with first ends of rectifiers VD 1-VD 4, two ends of a secondary coil L2 of the transformer T are respectively and electrically connected with second ends and fourth ends of rectifiers VD 1-VD 4, third ends of the rectifiers VD 1-VD 4 are respectively and electrically connected with one end of a capacitor C3, a sliding end of a sliding rheostat R1, one end of a resistor R9, a negative electrode of a diode D2 and a base electrode of a PNP triode Q2, one end of the sliding rheostat 1 is electrically connected with a positive electrode of a, the other end of the resistor R9 is electrically connected with an emitter of a PNP type triode Q1, a base of the PNP type triode Q1 is electrically connected with one end of a slide rheostat R1, collectors of the PNP type triode Q1 are respectively electrically connected with one end of a resistor R2 and a base of an NPN type triode Q4, a collector of the NPN type triode Q4 is electrically connected with one end of a resistor R3, the other end of the resistor R3 is electrically connected with a collector of the PNP type triode Q2, emitters of the PNP type triode Q2 are respectively electrically connected with one end of a resistor R4 and an emitter of the PNP type triode Q3, the other end of the resistor R4 is electrically connected with one end of a resistor R5, a base of the PNP type triode Q3 is electrically connected with one end of an adjustable capacitor C4, the other end of the adjustable capacitor C4 is electrically connected with one end of a resistor R8, the other end of the resistor R8 and the collectors of the, two ends of the switch S1 are electrically connected with a sliding end of a sliding rheostat R7, a cathode of a diode D3 and an anode of a diode D4 respectively, one ends of the sliding rheostat R7, the cathode of the diode D3 and the anode of the diode D4 are electrically connected with the same capacitor C5, one end of the sliding rheostat R7 is electrically connected with an anode of a diode D3 and a cathode of a diode D4 respectively, the anode of the diode D2 is electrically connected with one end of a resistor R6, the other end of the resistor R6 is electrically connected with a collector of a PNP triode Q3, fourth ends of the rectifiers VD 1-VD 4 are electrically connected with two ends of an adjustable capacitor C8, one end of the adjustable capacitor C8 is electrically connected with one end of a resistor R14, the other end of the resistor R14 is electrically connected with an emitter of a PNP triode Q5, and the collector of the PNP triode Q5 is electrically connected with one end of a resistor R13, the base of the PNP triode Q5 is electrically connected with the sliding end of a sliding rheostat R12, one end of the sliding rheostat R12 is electrically connected with the sliding end of the sliding rheostat R11, the anode of a diode D5 and one end of a capacitor C7 respectively, the cathode of the diode D5 and one end of the sliding rheostat R7 are electrically connected with one end of the same capacitor C6, and the other end of the capacitor C6 is electrically connected with one end of a resistor R10 and one end of a resistor R15 respectively and is connected with a ground wire.
2. The lighting circuit for a railway signal track circuit simulation box as claimed in claim 1, wherein the resistances of the resistor R2, the resistor R3, the resistor R4, the resistor R5, the resistor R6, the resistor R8, the resistor R9, the resistor R10, the resistor R13, the resistor R14 and the resistor R15 are 5800 ohm, 510 ohm, 1000 ohm, 500 ohm, 100 ohm, 1000 ohm, 2000 ohm, 3000 ohm and 1500 ohm respectively, and the resistances of the slide rheostat R1, the slide rheostat R7, the slide rheostat R11 and the slide rheostat R12 are all in the range of 1000 ohm to 5000 ohm.
3. The lighting circuit for the railway signal track circuit simulation box as claimed in claim 1, wherein the capacitance values of the capacitor C1, the capacitor C2, the capacitor C3, the capacitor C5, the capacitor C6 and the capacitor C7 are 0.1PF, 20PF, 30PF and 55PF respectively, the capacitors C4 and C8 are adjustable capacitors, and the capacitance values are 1 PF-50 PF respectively.
4. The lighting circuit for railway signal track circuit analog box as claimed in claim 1, wherein said fuse FU1 and fuse FU2 each have a capacity of 10A.
5. The light circuit for a railway signal track circuit simulation box of claim 1, wherein the diode D3 and the diode D4 are both light emitting diodes, and the light source emitted by the diode D3 is yellow light and the light source emitted by the diode D4 is green light.
6. The lighting circuit for the railway signal track circuit analog box as claimed in claim 1, wherein the rectifier VD 1-VD 4 is a bridge rectifier and is model 2KBP 08M.
7. The lighting circuit for the railway signal track circuit simulation box as claimed in claim 1, wherein the other end of the resistor R10, the other end of the resistor R15, the other end of the resistor R13, the other end of the capacitor C7, the cathode of the diode D1, the other end of the resistor R2, the emitter of the NPN-type triode Q4, the other end of the resistor R5 and the other end of the resistor R8 are all electrically grounded.
8. The light circuit for a railway signal track circuit analog box of claim 1, wherein the diode D1 and the diode D5 are both zener diodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810629763.0A CN110621097B (en) | 2018-06-19 | 2018-06-19 | Light-emitting circuit for railway signal track circuit simulation box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810629763.0A CN110621097B (en) | 2018-06-19 | 2018-06-19 | Light-emitting circuit for railway signal track circuit simulation box |
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| Publication Number | Publication Date |
|---|---|
| CN110621097A true CN110621097A (en) | 2019-12-27 |
| CN110621097B CN110621097B (en) | 2022-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810629763.0A Active CN110621097B (en) | 2018-06-19 | 2018-06-19 | Light-emitting circuit for railway signal track circuit simulation box |
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|---|---|---|---|---|
| EP1278401A1 (en) * | 2001-06-27 | 2003-01-22 | Alcatel | Power converter for generating a constant LED signal |
| CN2557383Y (en) * | 2002-04-25 | 2003-06-25 | 周珑 | LED light source railway color light signal mechanism |
| US20070262920A1 (en) * | 2006-05-11 | 2007-11-15 | Werner James C | Signal apparatus, light emitting diode (led) drive circuit, led display circuit, and display system including the same |
| CN201577219U (en) * | 2009-12-19 | 2010-09-08 | 牛国伟 | Light source lighting circuit for long life LED railway annunciator |
| CN104638610A (en) * | 2013-11-13 | 2015-05-20 | 成都摩宝网络科技有限公司 | Overvoltage protection circuit of aviation signal emitter |
-
2018
- 2018-06-19 CN CN201810629763.0A patent/CN110621097B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1278401A1 (en) * | 2001-06-27 | 2003-01-22 | Alcatel | Power converter for generating a constant LED signal |
| CN2557383Y (en) * | 2002-04-25 | 2003-06-25 | 周珑 | LED light source railway color light signal mechanism |
| US20070262920A1 (en) * | 2006-05-11 | 2007-11-15 | Werner James C | Signal apparatus, light emitting diode (led) drive circuit, led display circuit, and display system including the same |
| CN201577219U (en) * | 2009-12-19 | 2010-09-08 | 牛国伟 | Light source lighting circuit for long life LED railway annunciator |
| CN104638610A (en) * | 2013-11-13 | 2015-05-20 | 成都摩宝网络科技有限公司 | Overvoltage protection circuit of aviation signal emitter |
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| CN110621097B (en) | 2022-03-22 |
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