Two-color conversion indicating lamp circuit

Abstract

The utility model belongs to the field of electrical technology, and particularly relates to a two-color conversion indicating lamp circuit. The two-color conversion indicating lamp circuit comprises a red LED lamp circuit module, a green LED lamp circuit module and an LED voltage reverse protection circuit module. The LED voltage reverse protection circuit module comprises a diode D1 and a diode D2; the anode of the diode D1 is electrically connected with the green LED lamp circuit module; the negative electrode of the diode D1 is electrically connected with the negative electrode of the red LED lamp circuit module, the negative electrode of the green LED lamp circuit module and the negative electrode of the diode D2. And the positive electrode of the diode D2 is electrically connected with the red LED lamp circuit module. According to the utility model, the color of the indicating lamp can be changed by simply changing the connecting wires at the two ends of the indicating lamp without replacing the indicating lamp.

Description

Technical Field

[0001] The utility model belongs to the field of electrical technology, and particularly relates to a dual-color conversion indicator light circuit. Background Art

[0002] Currently, panels on distribution cabinets, electrical control cabinets, and other equipment often feature indicator lights and illuminated buttons in various colors to indicate equipment operating status. The power supply for these indicators is primarily AC 220V or DC 24V. For safety reasons, DC 24V is more common. Due to their high luminous efficiency, long lifespan, and continuously declining prices, LEDs are virtually universally used for indicator lights in electrical control cabinets and distribution cabinets. Indicator lights come in various colors, including red, green, and yellow, with green and red being the most common. For power transmission and distribution equipment, standards stipulate that a green light indicates a safe stop, while a red light indicates operation, which is dangerous. For electrical control cabinets, the opposite is true: a green light indicates operation, while a red light indicates a stop.

[0003] Because different users have different backgrounds and habits, and refer to different standards, electrical control cabinet manufacturers often fail to understand their users' backgrounds, habits, and needs. This often leads to the red and green indicator lights not meeting user requirements during on-site commissioning, necessitating replacement of the indicator lights, a time-consuming and labor-intensive process.

[0004] Therefore, it is very important to design a dual-color conversion indicator light circuit that can change the color of the indicator light by simply exchanging the wiring at both ends of the indicator light without replacing the indicator light. Utility Model Content

[0005] The utility model aims to overcome the problem in the prior art that, in the existing electrical control cabinet, when the colors of the red and green indicator lights do not meet the user's requirements, the indicator lights need to be replaced, which is time-consuming and laborious. The utility model provides a two-color conversion indicator light circuit that can change the color of the indicator light without replacing the indicator light, but only by simply swapping the wiring at both ends of the indicator light.

[0006] In order to achieve the above-mentioned purpose of the utility model, the utility model adopts the following technical solutions:

[0007] A dual-color conversion indicator light circuit includes a red LED light circuit module, a green LED light circuit module, and an LED reverse voltage protection circuit module; the LED reverse voltage protection circuit module includes a diode D1 and a diode D2; the anode of diode D1 is electrically connected to the green LED light circuit module; the cathode of diode D1 is electrically connected to the red LED light circuit module, the green LED light circuit module, and the cathode of diode D2 respectively; the anode of diode D2 is electrically connected to the red LED light circuit module.

[0008] Preferably, the red LED lamp circuit module includes a red light-emitting diode LED1 and a current-limiting resistor R1; the cathode of the red light-emitting diode LED1 is electrically connected to the current-limiting resistor R1; the anode of the red light-emitting diode LED1 is electrically connected to the cathode of the diode D1, the green LED lamp circuit module and the cathode of the diode D2 respectively; the anode of the diode D2 is electrically connected to the current-limiting resistor R1.

[0009] Preferably, the red light emitting diode LED1 leads to the indicator light terminal X1.

[0010] Preferably, the green LED lamp circuit module includes a green light-emitting diode LED2 and a current-limiting resistor R2; the cathode of the green light-emitting diode LED2 is electrically connected to the current-limiting resistor R2; the anode of the green light-emitting diode LED2 is electrically connected to the cathode of the diode D1, the anode of the red light-emitting diode LED1 and the cathode of the diode D2 respectively; the anode of the diode D1 is electrically connected to the current-limiting resistor R2.

[0011] Preferably, the green light emitting diode LED2 leads to the indicator light terminal X2.

[0012] Preferably, both the diode D1 and the diode D2 are rectifier diodes.

[0013] As an advantage, the average forward current I of the rectifier diode is FAV Greater than the operating current J of the light-emitting diode F ; The maximum reverse operating voltage V of the rectifier diode RM Greater than the operating voltage U.

[0014] Preferably, the diode D1 and the diode D2 are both 1N4001 or 1N1001.

[0015] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention does not require replacement of the indicator light. The color of the indicator light can be changed by simply swapping the wiring at both ends of the indicator light, which is easy to operate and saves time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a circuit diagram of the present utility model. DETAILED DESCRIPTION

[0017] In order to more clearly illustrate the embodiments of the present invention, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without inventive work.

[0018] Example:

[0019] like Figure 1 As shown, the utility model provides a dual-color conversion indicator light circuit, including a red LED light circuit module, a green LED light circuit module and an LED reverse voltage protection circuit module; the LED reverse voltage protection circuit module includes a diode D1 and a diode D2; the anode of the diode D1 is electrically connected to the green LED light circuit module; the cathode of the diode D1 is electrically connected to the red LED light circuit module, the green LED light circuit module and the cathode of the diode D2 respectively; the anode of the diode D2 is electrically connected to the red LED light circuit module.

[0020] The indicator light is provided with a red LED light and a green LED light, and is suitable for a DC 24V power supply system.

[0021] Furthermore, the red LED light circuit module includes a red light-emitting diode (LED1) and a current-limiting resistor (R1). The cathode of the red light-emitting diode (LED1) is electrically connected to the current-limiting resistor (R1). The anode of the red light-emitting diode (LED1) is electrically connected to the cathode of the diode (D1), the green LED light circuit module, and the cathode of the diode (D2). The anode of the diode (D2) is electrically connected to the current-limiting resistor (R1). The red light-emitting diode (LED1) leads to the indicator light terminal (X1).

[0022] Furthermore, the green LED lamp circuit module includes a green light-emitting diode (LED2) and a current-limiting resistor (R2). The cathode of the green light-emitting diode (LED2) is electrically connected to the current-limiting resistor (R2). The anode of the green light-emitting diode (LED2) is electrically connected to the cathode of the diode (D1), the anode of the red light-emitting diode (LED1), and the cathode of the diode (D2). The anode of the diode (D1) is electrically connected to the current-limiting resistor (R2). The green light-emitting diode (LED2) leads to the indicator light terminal (X2).

[0023] Both diodes D1 and D2 are rectifier diodes, and the specific model can be 1N4001 or 1N1001. Diodes D1 and D2 have the functions of unidirectional conduction and reverse voltage protection of the light-emitting diode.

[0024] In addition, the average forward current I of the rectifier diode FAV Greater than the operating current J of the light-emitting diode F ; The maximum reverse operating voltage V of the rectifier diode RM Greater than the operating voltage U.

[0025] The working principle of this utility model is as follows:

[0026] When X1 is connected to the + side of the power supply and X2 to the - side, D1 conducts, applying a forward voltage to LED1. This causes the red LED to conduct and emit red light. However, a reverse voltage is applied to LED2, and the green LED does not emit light. Because diode D1 conducts, the voltage drop across D1 is small, and the reverse voltage across LED2 is also small, preventing LED2 from breaking down and providing reverse voltage protection.

[0027] When X2 is connected to the + side of the power supply and X1 to the - side, D2 conducts, applying a forward voltage to LED2. This causes the green LED to turn on and emit green light. However, a reverse voltage is applied to LED1, and the red LED does not emit light. Because diode D2 conducts, the voltage drop across D2 is small, and the reverse voltage across LED1 is also small, preventing LED1 from breaking down and providing reverse voltage protection.

[0028] Changing the current limiting resistor value can be applied to indicator lights with different DC working voltages. The current limiting resistor is based on the working voltage U and the forward working voltage V of the light emitting diode LED. F and operating current I F Determine, the specific formula is as follows:

[0029] R=(UV F ) / I.

[0030] The above description is only a detailed description of the preferred embodiments and principles of the present invention. For ordinary technicians in this field, based on the ideas provided by the present invention, there will be changes in the specific implementation methods, and these changes should also be regarded as the scope of protection of the present invention.

Claims

1. The dual-color conversion indicator light circuit is characterized by: It includes a red LED lamp circuit module, a green LED lamp circuit module and an LED reverse voltage protection circuit module; the LED reverse voltage protection circuit module includes a diode D1 and a diode D2; the anode of the diode D1 is electrically connected to the green LED lamp circuit module; the cathode of the diode D1 is electrically connected to the red LED lamp circuit module, the green LED lamp circuit module and the cathode of the diode D2 respectively; the anode of the diode D2 is electrically connected to the red LED lamp circuit module.

2. The dual-color conversion indicator light circuit according to claim 1, characterized in that: The red LED lamp circuit module includes a red light-emitting diode LED1 and a current-limiting resistor R1; the cathode of the red light-emitting diode LED1 is electrically connected to the current-limiting resistor R1; the anode of the red light-emitting diode LED1 is electrically connected to the cathode of the diode D1, the green LED lamp circuit module and the cathode of the diode D2; the anode of the diode D2 is electrically connected to the current-limiting resistor R1.

3. The dual-color conversion indicator light circuit according to claim 2, characterized in that: The red light emitting diode LED1 leads to the indicator light terminal X1.

4. The dual-color conversion indicator light circuit according to claim 3, characterized in that: The green LED lamp circuit module includes a green light-emitting diode LED2 and a current-limiting resistor R2; the cathode of the green light-emitting diode LED2 is electrically connected to the current-limiting resistor R2; the anode of the green light-emitting diode LED2 is electrically connected to the cathode of the diode D1, the anode of the red light-emitting diode LED1 and the cathode of the diode D2 respectively; the anode of the diode D1 is electrically connected to the current-limiting resistor R2.

5. The dual-color conversion indicator light circuit according to claim 4, characterized in that: The green light emitting diode LED2 leads to the indicator light terminal X2.

6. The dual-color conversion indicator light circuit according to claim 4, characterized in that: Both diode D1 and diode D2 are rectifier diodes.

7. The dual-color conversion indicator light circuit according to claim 6, characterized in that: The average forward current I of the rectifier diode FAV Greater than the operating current J of the light-emitting diode F ; The maximum reverse operating voltage V of the rectifier diode RM Greater than the operating voltage U.

8. The dual-color conversion indicator light circuit according to any one of claims 1 to 7, characterized in that: The diode D1 and the diode D2 are both 1N4001 or 1N1001.

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