750103 in stock German 750103 electrical components 750103 inventory

750103 electrical component is a resistive element with three terminals, whose resistance can be adjusted according to a specific variation pattern. A potentiometer typically consists of a resistive body and a movable wiper. When the wiper moves along the resistive body, a resistance value or voltage related to the displacement is obtained at the output terminal. A potentiometer can be used as either a three-terminal or a two-terminal component. The latter can be regarded as a variable resistor; since its function in a circuit is to obtain an output voltage that has a certain relationship with the input voltage (applied voltage), it is called a potentiometer. A potentiometer is a type of variable resistor. It usually consists of a resistive body and a rotating or sliding system, obtaining partial voltage output by moving a movable contact on the resistive body. The function of a potentiometer is to adjust voltage (including DC voltage and signal voltage) and current magnitude. Structural features of a potentiometer: The resistive body of a potentiometer has two fixed terminals. By manually adjusting the shaft or slider, the position of the movable contact on the resistive body is changed, thereby altering the resistance between the movable contact and any fixed terminal, which in turn changes the voltage and current magnitude. A potentiometer is an adjustable electronic component. It consists of a resistive body and a rotating or sliding system. When a voltage is applied across the two fixed contacts of the resistive body, changing the position of the contact on the resistive body via the rotating or sliding system yields a voltage between the movable contact and the fixed contact that is related to the position of the movable contact. It is mostly used as a voltage divider, in which case the potentiometer is a four-terminal component. A potentiometer is essentially a sliding rheostat, available in several styles, generally used for volume control in speakers and power adjustment for laser heads. A potentiometer is an adjustable electronic component. It is a variable resistor used for voltage division. One or two movable metal contacts are pressed tightly against the exposed resistive body. The contact position determines the resistance between either end of the resistive body and the contact. Classified by material: wirewound, carbon film, and solid-core potentiometers. Classified by the relationship between the output-to-input voltage ratio and the rotation angle: linear potentiometers (linear relationship) and functional potentiometers (curvilinear relationship). Main parameters include resistance, tolerance, and rated power. Widely used in electronic equipment, such as for volume control in audio systems and receivers.

750103 electrical component principle

In chemical batteries, the direct conversion of chemical energy into electrical energy results from spontaneous oxidation-reduction reactions occurring internally within the battery, taking place at two electrodes. The negative electrode active material consists of reducing agents with a more negative potential that are stable in the electrolyte, such as active metals like zinc, cadmium, and lead, as well as hydrogen or hydrocarbons. The positive electrode active material consists of oxidizing agents with a more positive potential that are stable in the electrolyte, such as metal oxides like manganese dioxide, lead dioxide, and nickel oxide, oxygen or air, halogens and their salts, oxyacids and their salts, etc. The electrolyte is a material with good ionic conductivity, such as aqueous solutions of acids, bases, and salts, organic or inorganic non-aqueous solutions, molten salts, or solid electrolytes. When the external circuit is open, although there is a potential difference (open-circuit voltage) between the two electrodes, no current flows, and the chemical energy stored in the battery is not converted into electrical energy. When the external circuit is closed, current flows through the external circuit under the influence of the potential difference between the two electrodes. Simultaneously, inside the battery, since there are no free electrons in the electrolyte, charge transfer must accompany oxidation or reduction reactions at the interface between the electrode active materials and the electrolyte, as well as mass transfer of reactants and products. Charge transfer within the electrolyte is also accomplished by ion migration. Therefore, normal charge and mass transfer processes within the battery are necessary conditions for ensuring normal electrical energy output. During charging, the direction of charge and mass transfer processes inside the battery is opposite to that during discharging; electrode reactions must be reversible to ensure the normal progress of reverse mass and charge transfer processes. Thus, reversibility of electrode reactions is a necessary condition for constituting a storage battery. This is the fundamental thermodynamic relationship between battery electromotive force and battery reaction, and also the basic thermodynamic equation for calculating battery energy conversion efficiency. In practice, when current flows through an electrode, the electrode potential deviates from the thermodynamically balanced electrode potential; this phenomenon is called polarization. The greater the current density (current passing through unit electrode area), the more severe the polarization. Polarization is one of the important causes of battery energy loss. There are three causes of polarization: (1) polarization caused by the resistance of various parts within the battery is called ohmic polarization; (2) polarization caused by the hindrance of the charge transfer process in the electrode-electrolyte interface layer is called activation polarization; (3) polarization caused by the sluggishness of the mass transfer process in the electrode-electrolyte interface layer is called concentration polarization. Methods to reduce polarization include increasing the electrode reaction area, decreasing current density, raising the reaction temperature, and improving the catalytic activity of the electrode surface.

750103 electrical component characteristics

The static characteristics of a sensor refer to the relationship between the sensor's output and input quantities for static input signals. Since the input and output quantities are independent of time in this case, their relationship, i.e., the static characteristics of the sensor, can be described by an algebraic equation without time variables, or by a characteristic curve plotted with the input quantity as the abscissa and the corresponding output quantity as the ordinate. Main parameters characterizing the static characteristics of a sensor include: linearity, sensitivity, hysteresis, repeatability, drift, etc. (1) Linearity: Refers to the degree to which the actual relationship curve between the sensor's output and input quantities deviates from the fitted straight line. It is defined as the ratio of the maximum deviation between the actual characteristic curve and the fitted straight line over the full scale range to the full-scale output value. (2) Sensitivity: Sensitivity is an important indicator of a sensor's static characteristics. It is defined as the ratio of the increment in the output quantity to the corresponding increment in the input quantity that causes it. S is used to denote sensitivity. (3) Hysteresis: Hysteresis is the phenomenon where the input-output characteristic curves do not coincide when the sensor's input changes from small to large (forward stroke) and from large to small (reverse stroke). For the same magnitude of input signal, the output signals for the forward and reverse strokes are unequal; this difference is called the hysteresis error. (4) Repeatability: Repeatability refers to the degree of inconsistency in the characteristic curves obtained when the sensor's input undergoes continuous multiple full-scale changes in the same direction. (5) Drift: Sensor drift refers to the phenomenon where the sensor's output changes over time while the input remains constant. There are two causes of drift: one is the sensor's own structural parameters; the other is the surrounding environment (such as temperature, humidity, etc.). (6) Resolution: When the sensor's input increases slowly from a non-zero value, an observable change in output occurs after exceeding a certain increment; this input increment is called the sensor's resolution, i.e., the minimum input increment. (7) Threshold: When the sensor's input increases slowly from zero, an observable change in output occurs after reaching a certain value; this input value is called the sensor's threshold voltage.

750103 electrical component characteristics

The characteristics of an inductor are exactly opposite to those of a capacitor; it has the property of blocking alternating current (AC) while allowing direct current (DC) to pass smoothly. The resistance when a DC signal passes through the coil is simply the resistance of the wire itself, resulting in a very small voltage drop; when an AC signal passes through the coil, a self-induced electromotive force is generated across the coil terminals. The direction of this self-induced electromotive force is opposite to that of the applied voltage, hindering the passage of AC. Therefore, the characteristic of an inductor is to pass DC and block AC; the higher the frequency, the greater the coil impedance. Inductors often work together with capacitors in circuits to form LC filters, LC oscillators, etc. Additionally, people utilize the characteristics of inductance to manufacture chokes, transformers, relays, and other devices. Passing DC: Refers to the inductor presenting a conductive state to DC. If the resistance of the inductor coil is neglected, DC can pass through the inductor "unimpeded." For DC, the coil's own resistance offers very little hindrance, so it is often ignored in circuit analysis. Blocking AC: When AC passes through the inductor coil, the inductor offers resistance to the AC; this hindrance to AC is the inductive reactance of the coil.

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