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6ES7155-6AU01-0BN0 electrical component is a common light-emitting device that emits light by releasing energy through the recombination of electrons and holes. It is widely used in the lighting field. Light-emitting diodes can efficiently convert electrical energy into light energy and have extensive applications in modern society, such as in lighting, flat-panel displays, and medical devices. This electronic component first appeared in 1962, initially emitting only low-intensity red light. Later, versions emitting other monochromatic lights were developed. The emitted light now covers the visible spectrum, infrared, and ultraviolet ranges, with significantly increased luminous intensity. Its applications have expanded from initial uses as indicator lights and display panels. Light-emitting diode is abbreviated as LED. It is made from compounds containing gallium, arsenic, phosphorus, nitrogen, etc. When electrons and holes recombine, they emit visible light, making it suitable for manufacturing light-emitting diodes. In circuits and instruments, it serves as an indicator light or forms text and numeric displays. Gallium arsenide diodes emit red light, gallium phosphide diodes emit green light, silicon carbide diodes emit yellow light, and gallium nitride diodes emit blue light. Based on chemical properties, they are classified into organic light-emitting diodes (OLED) and inorganic light-emitting diodes (LED). LED was initially used for indicative lighting in instruments and meters, later expanding to traffic signals, landscape lighting, automotive lighting, and mobile phone keypads and backlights. Subsequently, new technology for micro-LED (micro-LED) was developed, significantly reducing the size of traditional light-emitting diodes. Arrays of independently emitting red, blue, and green micro-LEDs form display arrays for display technology applications. Micro-LEDs feature self-emissive display characteristics, offering higher efficiency, longer lifespan, and greater stability against environmental influences compared to self-emissive organic light-emitting diodes.

6ES7155-6AU01-0BN0 Electrical Component Functions

Functions of capacitors: 1. Capacitors used in coupling circuits are called coupling capacitors. This type of capacitor circuit is widely used in RC-coupled amplifiers and other capacitor-coupled circuits to block DC and pass AC signals. 2. Capacitors used in filtering circuits are called filter capacitors. This type of capacitor circuit is used in power supply filters and various filter circuits to remove signals within specific frequency bands from the total signal. 2. Capacitors used in decoupling circuits are called decoupling capacitors. This type of capacitor circuit is used in the DC voltage supply circuits of multi-stage amplifiers to eliminate harmful low-frequency coupling between amplifier stages. 3. Capacitors used in high-frequency oscillation suppression circuits are called high-frequency suppression capacitors. In audio negative feedback amplifiers, this type of capacitor circuit is employed to suppress potential high-frequency self-oscillation and eliminate possible high-frequency squealing in the amplifier. 4. Capacitors used in LC resonant circuits are called resonant capacitors. This type of capacitor circuit is required in both LC parallel and series resonant circuits. 5. Capacitors used in bypass circuits are called bypass capacitors. If a specific frequency band needs to be removed from a signal in a circuit, a bypass capacitor circuit can be used. Depending on the frequency of the signal to be removed, there are full-frequency (all AC signals) bypass capacitor circuits and high-frequency bypass capacitor circuits. 6. Capacitors used in neutralization circuits are called neutralization capacitors. This type of neutralization capacitor circuit is adopted in RF and IF amplifiers of radios and RF amplifiers of televisions to eliminate self-oscillation. 7. Capacitors used in timing circuits are called timing capacitors. Timing capacitor circuits are used in circuits requiring time control through capacitor charging and discharging, where the capacitor controls the magnitude of the time constant. 8. Capacitors used in integration circuits are called integrating capacitors. In synchronous separation circuits for potential field scanning, this type of integrating capacitor circuit is used to extract the field synchronization signal from the field composite sync signal. 9. Capacitors used in differentiation circuits are called differentiating capacitors. In flip-flop circuits, this type of differentiating capacitor circuit is employed to obtain sharp-triggered pulse signals from various signals (mainly rectangular pulses). 10. Capacitors used in compensation circuits are called compensation capacitors. In the bass compensation circuit of cassette decks, this type of low-frequency compensation capacitor circuit is used to enhance low-frequency signals in the audio output. Additionally, there are high-frequency compensation capacitor circuits. 11. Capacitors used in bootstrap circuits are called bootstrap capacitors. Common OTL power amplifier output stage circuits adopt this bootstrap capacitor circuit to slightly increase the amplitude of the positive half-cycle of the signal through positive feedback. 12. Capacitors used in crossover networks are called crossover capacitors. In speaker crossover networks, crossover capacitor circuits are used to ensure that tweeters operate in the high-frequency range, mid-range speakers in the mid-frequency range, and woofers in the low-frequency range. 13. Refers to the effective external capacitance that, together with the quartz crystal resonator, determines the load resonant frequency. Common standard values for load capacitance include 16pF, 20pF, 30pF, 50pF, and 110pF. Load capacitance can be appropriately adjusted according to specific conditions; generally, adjusting it allows tuning the resonator's operating frequency to its nominal value.

6ES7155-6AU01-0BN0 Electrical Component Functions

Low-power resistors are typically composed of carbon film encapsulated in a plastic housing, while high-power resistors are usually wire-wound resistors, made by winding high-resistivity metal wire around a ceramic core. If a resistor's resistance value approaches zero ohms (for example, a large-cross-section wire between two points), the resistor offers no obstruction to current, short-circuiting the loop in which it is connected in parallel, resulting in infinite current. If a resistor has infinite or very high resistance, the loop in which it is connected in series can be regarded as an open circuit, with zero current. Resistors commonly used in industry fall between these two extremes; they possess a certain resistance, allowing a specific current to flow, but the current is not as large as in a short circuit. The current-limiting function of a resistor is similar to how a small-diameter pipe restricts water flow between two large-diameter pipes. Resistance, usually abbreviated as R, is a fundamental property of a conductor, related to the conductor's dimensions, material, and temperature. Ohm's law states that I = U/R, therefore R = U/I. The basic unit of resistance is the ohm, represented by the Greek letter "Ω". It is defined as the resistance corresponding to one ampere of current generated when one volt is applied across a conductor. The primary function of a resistor is to impede current flow. In fact, "resistance" refers to a property, whereas "resistor" in electronic products usually refers to the component itself. Ohm is often abbreviated as "Oh". Other common units for expressing resistance values include kiloohm (kΩ), megaohm (MΩ), and milliohm (m Ω).

6ES7155-6AU01-0BN0 Electrical Component Features

(1) A loudspeaker has two terminals (two leads). When a single loudspeaker is used, the polarity of the two pins does not matter. When multiple loudspeakers are used simultaneously, the two pins have distinct polarities. (2) A loudspeaker has a paper cone, which is typically black, but can also be white. (3) Loudspeakers come in several shapes, including circular, square, and oval. (4) The back of the loudspeaker paper cone contains a magnet. For external-magnet loudspeakers, touching the magnet with a metal screwdriver reveals the presence of magnetism. Internal-magnet loudspeakers do not exhibit this sensation externally, but magnets are indeed present inside the housing. (5) Loudspeakers are mounted on machine panels or inside speaker enclosures.

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