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A power supply polarity detection circuit

A technology of polarity detection and power supply, which is applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., and can solve the problems of high cost and low detection efficiency.

Active Publication Date: 2015-08-12
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a power supply polarity detection circuit, aiming to solve the problems of high cost and low detection efficiency in current power supply polarity detection circuits

Method used

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  • A power supply polarity detection circuit
  • A power supply polarity detection circuit
  • A power supply polarity detection circuit

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Embodiment Construction

[0012] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0013] figure 1 The structure of the power supply polarity detection circuit provided by the first embodiment of the present invention is shown. For the convenience of description, only the parts related to the embodiment of the present invention are shown, and the details are as follows.

[0014] The power polarity detection circuit includes:

[0015] Positive detection terminal X1, negative detection terminal X2, first indicator LED1, second indicator LED2, current limiting resistor R1, current limiting resistor R2, current limiting resistor R3, first switch tube 100, second switch tube 200, dio...

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Abstract

The invention is applicable to the field of detection circuits and in particular relates to a power polarity detection circuit. According to the embodiment, the power polarity detection circuit consists of common discrete components, a tested power line is connected to a circuit, and the polarity of the power supply is judged through luminous states of two indicating lamps; and moreover, the power polarity detection circuit has the advantages of small size, simplicity, reliability, low cost and the like and can be taken along.

Description

technical field [0001] The invention belongs to the field of detection circuits, in particular to a power supply polarity detection circuit. Background technique [0002] In the process of home appliance maintenance and electrical testing, it is necessary to know the positive and negative poles of the DC power supply. The current method of detecting the polarity of the DC power supply usually uses a special multimeter to detect, but the multimeter is very expensive, and it costs thousands of yuan at least. And it is not conducive to carry around, so there are problems of high cost and low detection efficiency. Contents of the invention [0003] The object of the present invention is to provide a power supply polarity detection circuit, aiming at solving the problems of high cost and low detection efficiency in current power supply polarity detection circuits. [0004] The present invention is achieved in this way, a power supply polarity detection circuit, the power suppl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/06
Inventor 周明杰郑平
Owner OCEANS KING LIGHTING SCI&TECH CO LTD