A signal light circuit
A signal indicator and circuit technology, which is applied in the direction of electric lamp circuit layout, electric light source, light source, etc., can solve the problems of high cost and complex circuit structure, and achieve the effect of avoiding current instability and excessive circuit operating current.
Active Publication Date: 2016-04-27
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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Problems solved by technology
The usual signal indicators are realized by operational amplifiers or comparators combined with some resistors and other components. The circuit structure is complex and the cost is high.
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[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0017] In the embodiment of the present invention, the current flowing through the first light-emitting diode LED1 and the second light-emitting diode LED2 is controlled to be constant by setting a first constant current module and a second constant current module for the first light-emitting diode LED1 and the second light-emitting diode LED2 respectively. Value, to avoid constant changes in the current flowing through the LED, and can set an appropriate current fl...
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The invention discloses a signal indictor light circuit which comprises a triode Q1, a capacitance C2, a resistance R2, an R1 and a grade of current-limiting resistor (RC) amplifying circuit which is composed of a first light-emitted diode (LED)1 and a first constant current module, the signal indictor light circuit further comprises a Q2, a C1, an R1, an R2 and another grade of RC amplifying circuit composed of an LED2 and a second constant current module, and the output of the grade of RC amplifying circuit is coupled to the input of another grade of RC amplifying circuit, and thus a multivibrator with the constant current module is formed. By means of the signal indictor light circuit, the second constant current module is arranged for the LED2 through the fact that the first constant current module is arranged for the LED1, thus the current flows through the LED1 and the LED2 remains in a constant value, instability of the current which flows through each LED is avoided, and accordingly burnout of the LED caused by oversize of a working circuit is prevented.
Description
technical field [0001] The invention relates to the field of LEDs, in particular to a signal indicator circuit. Background technique [0002] With the development of science and technology, signal indicator lights are widely used in various occasions, such as airports, intersections, etc., and their functions are used for signal indication, safety warning, etc. The usual signal indicator light is implemented by using an operational amplifier or a comparator combined with some components such as resistors, and its circuit structure is complex and the cost is relatively high. Contents of the invention [0003] The technical problem to be solved by the embodiments of the present invention is to provide a signal indicator circuit, which has a simple circuit structure, can work at a stable constant current, and can avoid burning out due to large changes in the working current. [0004] In order to solve the above technical problems, an embodiment of the present invention provi...
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IPC IPC(8): H05B37/02
Inventor 周明杰管伟芳
Owner OCEANS KING LIGHTING SCI&TECH CO LTD