Power supply voltage offset indicating lamp circuit and power supply circuit
A technology of indicator light circuit and power supply voltage, applied in the direction of electrical components, etc., can solve the problems of poor indication effect, burn out output equipment, and the circuit cannot work, and achieve the effect of improving the indication effect.
Pending Publication Date: 2022-07-15
佛山市锐霸电子有限公司
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Problems solved by technology
[0002] The output voltage of the power supply is prone to voltage deviation after a long time of use, so it is necessary to find out that the power supply voltage becomes low or high in time to prevent the circuit from being unable to work due to low voltage or the output device being burned due to high voltage
In the power supply voltage indicator circuit of the prior art, the status of the indicator light is usually fixed when the power supply voltage shifts or jumps, and the indication effect is poor
Method used
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[0021] The present invention will be described in detail below with reference to specific embodiments.
[0022] see figure 1 , The power supply voltage offset indicator circuit of the present invention includes a voltage regulator circuit 10, a first color LED lamp, a second color LED lamp, a third color LED lamp, a first voltage regulator tube ZN1, and a second voltage regulator tube ZN2 , a third voltage regulator ZN3, a fourth voltage regulator ZN4, a first resistor R1, a second resistor R2, a third resistor R3, a first transistor Q1 and a second transistor Q2.
[0023] The first color LED light may be a blue LED light Lb, the second color LED light may be a green LED light Lg, and the third color LED light may be a red LED light Lr. Of course, in other embodiments, the first color LED light, the second color LED light, and the third color LED light can be LED lights of other colors, as long as the colors of the three color lights are different.
[0024] The voltage regul...
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A power supply voltage offset indicating lamp circuit comprises a voltage stabilizing circuit, a first color LED lamp, a second color LED lamp, a third color LED lamp, a first voltage stabilizing tube, a second voltage stabilizing tube, a third voltage stabilizing tube, a fourth voltage stabilizing tube, a first resistor, a second resistor, a third resistor, a first triode and a second triode. Wherein the voltage stabilizing circuit is used for providing reference voltage for the first color LED lamp, the second color LED lamp and the third color LED lamp, the positive electrode of the first color LED lamp is connected with the positive electrode of a power supply, the negative electrode of the first color LED lamp is connected with power supply voltage Vcc through a first voltage stabilizing tube, the second color LED lamp is connected with a first triode and a second triode, and the third color LED lamp is connected with a second triode. The negative electrode of the third color LED lamp is connected with the positive electrode of the power source through a seventh resistor, the positive electrode of the third color LED lamp is connected with the power supply voltage Vcc through a second voltage-regulator tube, through the circuit, the indicating lamp can have different states along with the deviation degree of the power supply voltage, and the indicating effect is improved.
Description
technical field [0001] The invention relates to the technical field of electronic circuits, in particular to a power supply voltage offset indicator circuit and a power supply circuit. Background technique [0002] The output voltage of the power supply is prone to voltage offset after a long period of use. Therefore, it is necessary to find out that the power supply voltage becomes lower or higher in time to prevent the circuit from working due to the lower voltage or the output device being burned out due to the higher voltage. In the power supply voltage indicator circuit of the prior art, the status of the indicator light is usually fixed when the power supply voltage shifts or jumps, and the indication effect is poor. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to provide a power supply voltage offset indicator light circuit, which can make the indicator light have different states according to the offset degree of the power supply voltag...
Claims
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IPC IPC(8): H05B45/20H05B45/34
CPCH05B45/20H05B45/34
Inventor 郑录古
Owner 佛山市锐霸电子有限公司