helios electrical components Germany helios model helios price

helios electrical components are wires that transmit current. Usually, current transmission is point-to-point. Power cords can be divided into AC AC power cords and DC DC power cords according to their use. Usually, AC power cords are wires that carry higher voltage AC. Due to the high voltage, these wires require unified standards and safety certification before they can be officially produced. DC cords basically carry lower voltage DC, so the safety requirements are not as strict as for AC cords. However, for safety reasons, countries still require unified safety certification.

helios electrical components functions

A multimeter can not only be used to measure the resistance of the object being measured, AC and DC voltage, but also DC voltage. Some multimeters can even measure the main parameters of transistors and the capacitance of capacitors. Fully mastering the use of a multimeter 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 by the pointer of the meter head. The measured value of a digital multimeter is directly displayed in numerical form on an LCD screen, which is convenient to read, and some also have voice prompt functions. A multimeter is an instrument that shares a single meter head, integrating a voltmeter, ammeter, and ohmmeter. The DC current range of a multimeter is a multi-range DC voltmeter. Connecting a shunt resistor in parallel with the meter head can expand 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 can expand 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. By using diodes to convert AC to DC, AC measurement is achieved.

helios electrical components structure

A bipolar junction transistor is made by fabricating two closely spaced PN junctions on a semiconductor substrate. These two PN junctions divide the entire semiconductor into three parts: the middle part is the base region, and the two sides are the emitter region and the collector region. There are two arrangement types: PNP and NPN. Corresponding electrodes are led out from the three regions, namely the base b, emitter e, and collector c. The PN junction between the emitter region and the base region is called the emitter junction, and the PN junction between the collector region and the base region is called the collector junction. The base region is very thin, while the emitter region is thicker with a high impurity concentration. In a PNP type transistor, the emitter region "emits" holes, whose movement direction is consistent with the current direction, so the emitter arrow points inward; in a NPN type transistor, the emitter region "emits" free electrons, whose movement direction is opposite to the current direction, so the emitter arrow points outward. The direction of the emitter arrow is also the conduction direction of the PN junction under forward voltage. Both silicon and germanium bipolar transistors have PNP and NPN types. Transistor packaging forms and pin identification: Common transistor packaging forms include metal and plastic packages. The pin arrangement follows certain rules. When placed in a bottom-view position, the three pins form the vertices of an isosceles triangle. From left to right, they are e, b, and c. For small and medium-power plastic transistors, when the flat side faces you and the three pins point downward, from left to right they are e, b, and c.

helios electrical components types

Common thermocouples can be divided into two categories: standard thermocouples and non-standard thermocouples. Standard thermocouples refer to those whose relationship between thermoelectric potential and temperature, allowable errors, and unified standard division tables are specified by national standards. They have matching display instruments available for selection. Non-standard thermocouples are inferior to standard thermocouples in terms of usage range or magnitude, and generally do not have unified division tables. They are mainly used for measurements in certain special occasions. Theoretically, any two different conductors (or semiconductors) can be configured as a thermocouple, but as a practical temperature measuring element, it has multiple requirements. To ensure reliability in engineering technology and sufficient measurement accuracy, not all materials can form thermocouples. The basic requirements for thermocouple electrode materials are: 1, stable thermoelectric properties within the temperature measurement range, not changing over time, sufficient physical and chemical stability, and resistance to oxidation or corrosion; 2, small resistance temperature coefficient, high conductivity, and low specific heat; 3, large thermoelectric potential generated during temperature measurement, and a linear or nearly linear single-valued functional relationship between thermoelectric potential and temperature; 12, good material reproducibility, high mechanical strength, simple manufacturing process, and low cost.

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