China Sichuan Qixing Electronics Co., Ltd. Company News

The main difference between potentiometers B103 and B502 lies in their maximum resistance values. B103: Represents an adjustable potentiometer with a maximum resistance of 10KΩ (i.e., 10,000Ω). Here, "103" follows a specific notation where "10" is the significant digit and "3" indicates that three zeros need to be added after "10", resulting in 10,000. B502: Indicates an adjustable potentiometer with a maximum resistance of 5KΩ (i.e., 5,000Ω). Similarly, "502" has "50" as the significant digit, and "2" means that two zeros need to be appended after "50", yielding 5,000. In terms of appearance and usage, both may look similar, typically featuring a circular disk with a rotating axis. These types of potentiometers are commonly found in old-fashioned radios, primarily used for volume control or other applications requiring continuous adjustment of resistance values. When selecting a potentiometer, the specific requirements of the circuit, such as the desired resistance range, must be taken into account. If the circuit necessitates a broader range of resistance adjustment, B103 may be the choice. Conversely, if a narrower range suffices, B502 could be more suitable. Apart from resistance values, factors like power rating, accuracy, reliability, and operating environment should also be considered when selecting a potentiometer. In summary, the key difference between potentiometers B103 and B502 lies in their maximum resistance values, with B103 being 10KΩ and B502 being 5KΩ. The appropriate model should be chosen based on the specific requirements and parameters of the circuit.

The difference between potentiometer single and duplex, the advantages and disadvantages of potentiometer single and duplex   Sure, here's the translation of the previous explanation into English: The potentiometers, single-gang and dual-gang, differ significantly in several aspects, including measurement principles, application scenarios, structural designs, and working mechanisms. Below is a detailed elaboration of these differences, along with a discussion of their respective advantages and disadvantages. Differences between Single-Gang and Dual-Gang Potentiometers Measurement Principles Single-Gang Potentiometer: Capable of measuring a single voltage and current, suitable for adjusting a single circuit parameter. Dual-Gang Potentiometer: Able to simultaneously measure two different voltages and currents, suitable for scenarios requiring the adjustment of multiple circuit parameters simultaneously. Application Scenarios Single-Gang Potentiometer: Commonly used in controlling a single power circuit, such as a dimmer switch for a handheld lamp, where only one parameter needs to be adjusted. Dual-Gang Potentiometer: Applicable in circuits that require the simultaneous control of two power sources, like volume and tone adjustments for both channels in a stereo audio equipment, necessitating the synchronous adjustment of two parameters. Structural Design Single-Gang Potentiometer: Relatively simple in structure, consisting of a single knob and an adjuster, making it compact and space-saving. Dual-Gang Potentiometer: More complex internally, requiring two knobs for control. It can be designed with coaxial shafts (where both potentiometers share the same axis) or independent shafts (where each axis adjusts its associated contact point without interference). Working Mechanism Single-Gang Potentiometer: Does not have contacts and has a fixed resistance value, often used as a limiting element in circuits. Dual-Gang Potentiometer: Has two contact points and allows the simultaneous adjustment of resistance values in two circuits through the rotation of knobs, enabling the synchronous adjustment of two parameters. Advantages and Disadvantages of Single-Gang and Dual-Gang Potentiometers Single-Gang Potentiometer Advantages: Simple Structure: Consisting of a single knob and adjuster, it has a compact design. Cost-Effective: Lower manufacturing costs due to its simplicity, translating to a more affordable price. Space-Saving: Suitable for applications with limited space. Disadvantages: Limited Functionality: Capable of controlling only one circuit or device's resistance value, offering limited functionality. Restricted Adjustment Range: May not meet the requirements of applications requiring a broader adjustment range. Dual-Gang Potentiometer Advantages: Versatile Functionality: With two adjustment shafts, it can simultaneously control the resistance values of two circuits or devices, offering increased versatility. Space-Efficient: Compared to two separate single-gang potentiometers, it reduces space usage, enabling a more compact circuit layout. Enhanced Flexibility: The two knobs can be adjusted independently or in unison, providing greater flexibility. Excellent Performance: Often features good heat resistance, high resolution, a wide operating frequency range, low noise, and small distributed inductance. Disadvantages: Complex Structure: The internal structure is relatively complex, leading to higher manufacturing costs and a subsequently higher price. High Adjustment Precision Requirements: Due to the need to simultaneously control two circuits or devices' resistance values, higher adjustment precision is required. Potential Wear Resistance Issues: Although not universal, some dual-gang potentiometers may exhibit poor wear resistance. In summary, single-gang and dual-gang potentiometers differ significantly in their measurement principles, application scenarios, structural designs, and working mechanisms, each with their unique advantages and disadvantages. The choice between them should be based on specific application requirements and circuit specifications.  

The precautions for using precision potentiometers encompass several aspects to ensure their proper operation and extended lifespan. Here are the key points translated into English: Storage and Installation Precautions Storage Environment: Avoid excessive compression when storing precision potentiometers to prevent the adjustment knob from falling off. Keep the storage environment dry to prevent internal components from getting damp. Store the potentiometers away from environments with high concentrations of chemicals such as ammonia, amines, alkaline solutions, aromatic hydrocarbons, ketones, halogenated hydrocarbons, etc., to prolong their service life. Installation Requirements: Use a mounting bracket to secure the potentiometer during installation. Handle the potentiometer gently during installation to avoid damaging the leads. Solder the external wiring to the waist groove of the leads rather than the top to minimize impact on the potentiometer's internal components. Do not disassemble, modify, or remove labels from the potentiometer without authorization, including loosening screws or adjusting the tightening ring position. Operation Precautions Adjustment Force: Adjust the potentiometer with moderate force to avoid damaging the adjustment knob or causing issues like incomplete closure or jamming. The reverse operation force may become lighter with increasing temperature and tighter with decreasing temperature. Use special low-temperature grease if operating in cold environments. Resistance Adjustment: Do not adjust the resistance of the precision potentiometer arbitrarily to prevent excessive deviation and potential damage due to excessive current. Electrical Parameters: Ensure the applied voltage is within the rated power dissipation range of the precision potentiometer. Reduce power usage at higher temperatures (e.g., above 70°C). Recommended current through the potentiometer is 2mA, with a maximum of 10mA, to prevent overcurrent damage. Grounding and Loading: If present, the grounding lug of the potentiometer must be grounded to prevent external interference. Avoid overloading the potentiometer by operating within its rated values. When using it as a variable resistor, adjust the allowable power dissipation proportionally to the contact brush's travel to ensure the current does not exceed the rated value. Environment and Cleaning: Prevent condensation or water droplets on the surface of the precision potentiometer and avoid using it in humid environments to prevent insulation degradation or short circuits. For non-sealed potentiometers with excessive noise, clean the resistance plate with alcohol-soaked cotton balls instead of applying lubricant. Also, remove oil stains from the contact brush and lead springs. Other Precautions Synchronization Accuracy: For dual-gang precision potentiometers, the installation structure, dimensions, and test reference points are typically based on the reference gang (first gang). Synchronization accuracy refers to the percentage difference in output voltage between the two gangs at a specific reference point. Accuracy and Linearity: The accuracy of a precision potentiometer refers to the conformity of its output characteristic, not the tolerance of its total resistance. Linear accuracy is measured independently with the load open-circuited. Replacement Principles: When replacing a severely damaged precision potentiometer, it's best to use one with the same model and resistance value. If unavailable, substitute with a similar model and resistance value, considering the allowable resistance variation range and power rating requirements.

How to mark and how to use commonly used resistors   Direct Marking Method The main parameters of the component are directly printed on the surface of the component. This method is mainly used for resistors with relatively high power ratings. For example, if the resistor surface is printed with "RXYC-50-T-1k5-±10%", it means a moisture-resistant, glazed, wire-wound, adjustable resistor with a rated power of 50W, a resistance value of 1.5kΩ, and an allowable error of ±10%. Letter Symbol Method As electronic components continue to miniaturize, especially with advancements in the manufacturing processes of surface-mounted components (SMCs and SMDs), the volume of resistors has become increasingly smaller, necessitating corresponding reforms in the textual symbols used on their surfaces. Generally, only three digits are used to indicate the value of the resistor, and the precision level is no longer explicitly indicated (typically less than ±5%). The specific rules are as follows: (1) The resistor is indicated by a black coating on the component surface. (2) The basic unit of measurement for resistors is the ohm (Ω), and the value is indicated using three digits. (3) For resistors above ten times the basic unit, the first two digits represent the significant digits of the value, and the third digit indicates the multiplier. For example, "100" indicates a resistance value of 10×100 = 10Ω; "223" indicates a resistance value of 22×10^3 = 22kΩ. (4) For components below ten times the basic unit, the first and third digits represent the significant digits of the value, and the second digit is replaced by the letter "R" to indicate the decimal point. For example, "3R9" indicates a resistance value of 3.9Ω.  

The methods for detecting faults in carbon film potentiometers mainly include the following: I. Resistance Measurement In-Circuit vs. Off-Circuit Measurement: In-Circuit Measurement: Measure the resistance between the two fixed pins of the potentiometer while it is still connected in the circuit. This method allows for a quick assessment of the potentiometer's performance within the circuit but may be influenced by other components in the circuit. Off-Circuit Measurement: Disconnect the potentiometer from the circuit and measure the resistance between its two fixed pins independently. This method provides a more accurate measurement, facilitating the diagnosis of faults within the potentiometer itself. Measurement Steps: Use the ohmmeter function of a multimeter. Connect one test lead to one fixed pin of the potentiometer, and the other test lead to the other fixed pin. Rotate the potentiometer's knob, observing the movement of the multimeter's pointer. Normally, the pointer should move smoothly from the minimum value (usually zero or close to zero) to the maximum value (the nominal resistance indicated on the potentiometer case). Criteria for Judgment: If the measured resistance differs significantly from the nominal resistance indicated on the potentiometer case, or if the pointer jumps unsteadily while rotating the knob, it indicates a fault in the potentiometer. II. Auditory Testing Testing in Operating Condition: Connect the potentiometer into the circuit and rotate its knob while the circuit is operational. Observe whether any abnormal noises, such as "squeaking," emanate from related devices in the circuit (e.g., loudspeakers). If so, it suggests excessive rotational noise in the potentiometer. Criteria for Judgment: Normally, rotating the potentiometer should not produce noticeable noise. If the noise is apparent and persistent, further inspection and repair are necessary. III. Other Detection Methods Cleaning Method: If the potentiometer exhibits rotational noise or poor contact, try cleaning the carbon film and contacts inside the potentiometer using pure alcohol cleaning solution. After cleaning, retest the potentiometer's performance to see if it has returned to normal. Lubrication Method: After cleaning the carbon film, add an appropriate amount of lubricant to reduce friction and extend the potentiometer's lifespan. However, be cautious not to overapply lubricant, as it may affect the potentiometer's performance. Mechanical Repair: If the potentiometer's housing can be disassembled and its internal components are not severely damaged, consider mechanical repair. For example, use a cotton swab soaked in anhydrous alcohol to gently clean the resistor strip, removing dirt and oil. Precautions Ensure power is disconnected before performing any inspection or repair to prevent electric shock hazards. Use multimeters and other measurement tools according to their instructions to avoid damaging the tools or causing measurement errors. When cleaning or lubricating, use appropriate cleaners and lubricants to prevent damaging the potentiometer.

From April 15th to 17th, 2025, the highly anticipated Expo Electronica (Russian Electronics Components and Production Equipment Exhibition) was grandly held at the Crocus Expo International Exhibition Center in Moscow. Sichuan Qixing Electronics Co., Ltd. made a splendid appearance at the exhibition with its star products, including wire-wound potentiometers, glass glaze preset potentiometers, and rotary potentiometers, showcasing its 17-year profound experience in foreign trade and high-quality products on this international stage in the electronics industry.​ During the exhibition, the booth of Sichuan Qixing Electronics Co., Ltd. became the focus of attention for many exhibitors and professional visitors. The company's displayed wire-wound potentiometers, with their advantages of high precision and high stability, can be widely used in precision instruments, automation equipment, and other fields. The glass glaze preset potentiometers are characterized by their heat resistance and moisture resistance, making them suitable for electronic devices in harsh environments. Rotary potentiometers, with their easy operation and long lifespan, are favored by the consumer electronics market. In addition, products such as wire-wound resistors, filters, potentiometer knobs, and band switches also attracted numerous professional buyers to stop by for inquiries, creating a lively atmosphere of on-site exchanges.​ As an enterprise with 17 years of deep cultivation in foreign trade exports, Sichuan Qixing Electronics' products have been exported to 58 countries worldwide. With its exquisite production technology, strict quality control system, and high-quality after-sales service, the company has accumulated a good reputation in the international market. Participating in the Expo Electronica in Russia was not only an important measure for the company to expand its markets in Russia and Europe but also an important window for it to showcase the strength of "Made in China Intelligence" (referring to China's advanced manufacturing capabilities) to the world.​ During the exhibition period, Sichuan Qixing Electronics reached cooperation intentions with numerous international clients, further consolidating its position in the international electronic components market. In the future, Sichuan Qixing Electronics will continue to adhere to the concept of innovation-driven development, continuously improve product quality and technological level, and provide more high-quality electronic component products and services for global customers, writing a more brilliant chapter in the international market.​ The above news release presents the company's exhibition highlights and achievements. If you think the content needs to be added to, reduced, or the style adjusted, please feel free to let me know for modifications.