Stars Elektronik electrical components Germany Stars Elektronik models Stars Elektronik prices

Stars Elektronik electrical components are products whose raw material molecular composition is not altered during factory processing, and can be referred to as components. Components belong to devices that do not require an energy source. They include: resistors, capacitors, and inductors. Circuit-type components include diodes and resistors; connection-type components include connectors, sockets, connecting cables, and printed circuit boards (PCB). Devices are products whose raw material molecular structure is altered during factory production and processing. Devices are divided into active devices and discrete devices. The main characteristic of active devices is that they generate or consume electrical energy and require an external power supply. Discrete devices are divided into bipolar junction transistors, field-effect transistors, thyristors, semiconductor resistors, and capacitors. shi

Stars Elektronik electrical component principles

A resistor consists of three parts: the resistive element, the backbone, and the leads (for solid-core resistors, the resistive element and backbone are combined into one), but only the resistive element determines the resistance value. The volt-ampere characteristic is represented by a graphical curve showing the relationship between voltage and current at the resistor terminals. When voltage and current are proportional (the characteristic is a straight line), it is called a linear resistor; otherwise, it is called a non-linear resistor. The maximum power allowed to be dissipated by a resistor when operating continuously at the rated temperature (maximum ambient temperature) tR. For each type of resistor, a maximum working voltage is also specified; that is, even if the rated power is not reached, the maximum working voltage must not be exceeded when the resistance value is high. The rated power of a resistor refers to the maximum power allowed to be consumed during long-term continuous operation in DC or AC circuits. Load characteristics: When the ambient operating temperature is below tR, the resistor must not exceed its rated power; when it exceeds tR, the load power must be reduced. Each type of resistor has specified load characteristics. In addition, the allowable load is correspondingly reduced under low atmospheric pressure. Under pulse load conditions, the average pulse power is far lower than the rated power, and separate specifications generally apply.

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A multimeter can not only measure the resistance of the object under test, but also AC and DC voltages, including DC voltage. Some multimeters can even measure the main parameters of transistors and the capacitance of capacitors. Proficient mastery of multimeter usage is one of the most basic skills in electronic technology. Common multimeters include analog multimeters and digital multimeters. An analog multimeter is a multi-function measuring instrument with a meter head as the core component, and the measured value is read from the pointer indication on the meter head. The measured value of a digital multimeter is directly displayed in numerical form on an LCD screen, making it easy to read; some also feature voice prompt functions. A multimeter is an instrument that integrates a voltmeter, ammeter, and ohmmeter using a common meter head. The DC current range of a multimeter is a multi-range DC ammeter. Connecting a shunt resistor in parallel with the meter head expands its current range. The DC voltage range of a multimeter is a multi-range DC voltmeter. Connecting a voltage-divider resistor in series with the meter head expands its voltage range. Different voltage-divider resistors result in different ranges. The meter head of a multimeter is a magnetoelectric measuring mechanism, which can only pass DC current. It uses diodes to convert AC to DC, thereby enabling the measurement of AC electricity.

Stars Elektronik electrical component principles

A transformer is a device that changes AC voltage using the principle of electromagnetic induction. Its main components are the primary coil, secondary coil, and iron core (magnetic core). In electrical equipment and wireless circuits, it is commonly used for stepping up or stepping down voltage, impedance matching, and safety isolation. In generators, whether the coil moves through a magnetic field or the magnetic field moves through a fixed coil, an electromotive force is induced in the coil. In both cases, the value of the magnetic flux remains unchanged, but the amount of magnetic flux linking the coil varies; this is the principle of mutual induction. A transformer is a device that utilizes electromagnetic mutual induction to transform voltage, current, and impedance.

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