Device for automatically distinguishing polarity, pin arrangement and hfe of audion

Abstract

The invention provides a device for automatically distinguishing the polarity, the pin arrangement and the hfe of an audion, comprising a single chip microcomputer, three resistors R1, R2 and R3 with the same resistance, three capacitors C1,C2 and C3 with the same capacitance, three testing terminals and six voltage acquisition points; three IO (Input / Output) interfaces of the single chip microcomputer are connected with the three testing terminals respectively through the first resistor R1, the second resistor R2 and the third resistor R3; the three testing terminals are earthed respectively through the first capacitor C1, the second capacitor C2 and the third capacitor C3; and the six voltage acquisition points are respectively arranged at two ends of the first resistor R1, two ends of the second resistor R2 and two ends of the third resistor R3. The device is realized on the basis of the single chip microcomputer and can be used as one module of a universal meter; and because the cost of the single chip microcomputer is lower and lower and the performance of the single chip microcomputer is higher and higher, the automatic testing level of the universal meter can be greatly improved by using only fewer devices.

Description

technical field [0001] The invention belongs to the field of electronic testing equipment, and in particular relates to a device for automatically judging the polarity, pin arrangement and HFE of a triode. Background technique [0002] Multimeters are the most basic instruments in the electronics industry, with huge sales, but traditional multimeters have fewer functions. High-end multimeters generally have a triode hfe test device, but to test the magnification of the triode with a multimeter, you need to know in advance whether the triode is PNP or NPN, and you need to know the pin layout, which brings great limitations to the triode test. Contents of the invention [0003] The present invention aims at the deficiencies of the above-mentioned prior art, and provides a device for automatically distinguishing the polarity of the triode, pin arrangement and hfe. [0004] The present invention is achieved through the following technical solutions: [0005] A device for au...

AI Technical Summary

Problems solved by technology

High-end multimeters generally have a triode hfe test device, but to test the magnification of the triode with a multimeter, you need to know in advance whether the triode is PNP or NPN, and you need to know the pin layout, which brings great limitations to the triode test.

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