Technical Articles
04-03
Identification of Color Ring Resistors
Black, Brown, Red, Orange, Yellow, Green, Blue, Purple, Gray, White, Gold, Silver
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 5%, 10%.
The penultimate ring indicates the number of zeros.
The last digit, the error.
04-03
Semiconductor triode discrimination - simple judgment
Test transistor with a multimeter (1) will be played to the multimeter beeping file, red pen fixed a pole with a black pen to try the other two poles were a few hundred readings when the red pen is the base pole. Repeatedly try. (2) to be tested out of the base, with a red pen connected to the base (B) multimeter has a reading of the triode for NPN (3) to be tested out of the base, with a black pen connected to the base (B) multimeter has a reading of the triode for the PNP general number of a motherboard is only a few.
04-03
What should I pay attention to when applying a transformer?
1, the rated primary current of the current transformer is generally 1.2 ~ 1.4 times the line current selection of current transformers, which is mainly to consider the line overload does not burn the current transformer and ammeter or meter and other electrical equipment. 2, the rated primary current of the current transformer can not be selected than the actual line current difference is too large, which will affect the measurement accuracy of the current transformer. 3, the transformer is in the rated secondary output load range to ensure the accuracy of the transformer. Therefore, including the secondary line load and the load of the measurement device for the actual work of the transformer load, when the actual output of the secondary transformer negative
04-03
Transient Suppression Diodes - Description
1、60%8/20μs)2、Low clamping voltage3、Protecting one bi-directional or two uni-directional wires4、Operating voltage volts,8V:3V,,12V,15Volt5、ESD protection>40kV down6、Compliant with 61000-4-2(ESD for short):Air-15kVContact-8kV,40A-5/ 50ns61000-4-4(EFT).
04-03
Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) is a field-effect transistor (field-effecttransistor) that can be widely used in analog and digital circuits. MOSFET according to its "channel" polarity, can be divided into n-type and p-type MOSFET, usually also known as NMOSFET and PMOSFET, and other simple
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