China Sichuan Qixing Electronics Co., Ltd. Company News

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.

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 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.

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 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.

【Announcement】 Dear Valued Customers and Partners, Greetings! In this era filled with opportunities and challenges, we are thrilled to announce that Tong Yue Xin Commercial And Trading Co., Ltd. (Chengdu) has officially joined the Alibaba platform, embarking on a new chapter of online sales and services! This marks a significant milestone in our development journey, signifying a solid step forward in market expansion, service optimization, and customer experience enhancement. Store Name: Tong Yue Xin Commercial And Trading Co., Ltd. (Chengdu) Platform: Alibaba Store Link: [https://resistance.en.alibaba.com/] (Note: This is a placeholder link. Please replace it with your actual Alibaba store URL.) As a company deeply rooted in the industry for years, with integrity as our foundation and quality as our priority, we are committed to providing our customers with the finest products, most reasonable prices, and the most attentive services. On our Alibaba store, you will find a diverse range of product lines, including but not limited to [please list a few product categories or services based on your actual offerings], all of which have undergone rigorous screening and quality control to ensure that every item meets your expectations. To celebrate our grand opening, we have prepared a series of exclusive promotional activities, such as limited-time discounts, buy-more-save deals, and introductory prices for new products, aiming to express our gratitude to our loyal customers for their unwavering support. Additionally, we will regularly update industry trends, product knowledge, and promotional information within the store, keeping you informed and entertained throughout your shopping journey. We fully understand that the trust and support of every customer drive our progress. Therefore, on our Alibaba store, you can expect a more convenient, efficient, and secure shopping experience. We pledge to continue offering high-quality pre-sales consultation, professional in-sales guidance, and comprehensive after-sales service, ensuring that every transaction exceeds your satisfaction. Hereby, we cordially invite you to visit Tong Yue Xin Commercial And Trading Co., Ltd. (Chengdu)'s Alibaba store and embark on your shopping adventure. Let us forge ahead together and create a bright future! Should you have any inquiries or require further information, please feel free to contact us through the live chat service within our Alibaba store. We are at your service with utmost dedication. Thank you once again for your attention and support! We look forward to meeting you on the Alibaba platform! Best Regards, Tong Yue Xin Commercial And Trading Co., Ltd. (Chengdu) [July 10, 2024]

Indian customers praised our potentiometers, ordered large quantities and participated in the grand event Recently, our company has welcomed a distinguished customer from India. They made a special trip to discuss cooperation with us and discuss the future development prospects of both parties. During this visit, the Indian customer expressed great satisfaction with the potentiometer produced by our company and decided to place a large order. During the negotiation, the Indian customer spoke highly of the performance, quality and price of our potentiometer. They said that our potentiometer has the advantages of high precision, high stability, long life, etc., which fully meets their needs. At the same time, our after-sales service also made them feel at ease, laying a solid foundation for the cooperation between the two sides. After in-depth communication, the Indian customer decided to order a large number of potentiometers from our company to support their business expansion in the Indian market. This large order not only reflects the competitiveness of our products, but also demonstrates the trust and support of Indian customers in our company. In order to celebrate this cooperation, the chairman of our company personally hosted a banquet for Indian customers. At the dinner, the two sides reviewed the cooperation process and looked forward to the future development prospects. The chairman said that he will continue to provide customers with high-quality products and services to help customers succeed. The visit of Indian customers provides a new opportunity for our company to expand overseas markets. We will continue to uphold the business philosophy of "quality first, customer first", continuously improve product quality and service level, and provide better products and services to customers around the world. The success of this cooperation has not only brought considerable commercial benefits to both sides, but also injected new vitality into the economic and trade exchanges between China and India. We look forward to working with more international customers to create a better future together."

Qixing Electronic Qingming Festival Holiday Notice Dear all employees According to the national statutory holiday regulations and the actual situation of the company, we hereby notify you of the arrangement for the Qingming Festival holiday in 2024 as follows: 1、 Holiday time The Qingming Festival holiday lasts from April 4th, 2024 to April 6th, 2024, for a total of 3 days. I will be working normally on April 7th (Saturday). 2、 Duty arrangement Please arrange duty personnel in advance for each department to ensure the normal operation of the company's various tasks during the holiday period. On duty personnel, please keep their mobile phones unobstructed in order to respond to possible emergency situations. 3、 Safety precautions Please conduct a safety check in the office area before the holiday to ensure that electrical equipment is turned off and documents and materials are properly organized. During the holiday, please pay attention to personal safety, abide by traffic rules, and avoid accidents. If there is an urgent work or emergency, please contact the relevant department head in a timely manner to coordinate and solve it together. 4、 Kind reminder Qingming Festival is a traditional festival in China, as well as an important moment for worshipping ancestors and remembering them. Please arrange your time reasonably during the holiday period, respect traditional customs, pay attention to civilized worship, and jointly create a harmonious and peaceful holiday atmosphere. Wishing everyone a healthy Qingming Festival! Qixing Electronics April 3, 2024 Note: The specific vacation arrangements may be adjusted according to the actual situation of the company. Employees are requested to follow the official notice from the company. Before the holiday, please be sure to pay attention to internal company notifications to ensure the most accurate information is obtained.

How to look at the resistance value of adjustable resistor?   An adjustable resistor is a component that can control the current in a circuit by adjusting the value of the resistor. In electronic circuit design and experimentation, it is very important to adjust the resistance value correctly, as it directly affects the performance and stability of the circuit. So, what should we think about the resistance of an adjustable resistor?   The resistance value of an adjustable resistor can be viewed in the following ways: Direct Labeling: On the surface of the adjustable resistor, the resistance value is directly marked, e.g. "500 Ω" or "500 ohms". If the resistance value is not directly marked, there is usually a mark, such as a color dot or ribbon, representing a different resistance range. For example, black for 0Ω, brown for 1Ω, red for 2Ω, and so on.   Color scale method: On the surface of the adjustable resistor, different colored bands or dots are used to mark the resistance value and allowable deviation. Most of the resistors in the world use the color code method. For example, when the resistor is four-ring, the last ring is usually gold or silver, representing a deviation of ±5% or ±10%, with the first three digits being significant figures and the number of powers. When the resistance is five rings, the distance between the last ring and the first four rings is larger, the first three digits are significant figures, the fourth digit is the number of power, and the fifth digit is the deviation.   Numeric method: On adjustable resistors, a three-digit number may be used to represent the nominal value. The numbers are from left to right, the first and second digits are the valid values, and the third digits are the exponents, that is, the number of zeros, and the unit is European. Deviations are usually represented by literal symbols.   Literal symbolic method: A combination of Arabic numerals and literal symbols is used to represent the nominal resistance, and its allowable deviation is also represented by literal symbols. The number before the symbol indicates the integer resistance, and the following numbers represent the first decimal resistance and then the second decimal resistance. For example, DFGJKM stands for different allowable deviations, which are ±0.5%, ±1%, ±2%, ±5%, ±10%, ±20%, respectively.   If you need to measure the resistance value of an adjustable resistor, you can use a multimeter or a digital resistance meter to test it. The resistance value can be measured by connecting the two ends of the adjustable resistor to take a reading. By reasonably selecting and adjusting the resistance of the adjustable resistor, the current in the circuit can be better controlled, and the stable operation and performance optimization of the circuit can be realized.

The definition of potentiometer output line and the wiring method for external potentiometer speed control are as follows: Definition of potentiometer output line: Potentiometers typically have three pins, known as terminal 1 (terminal 1), terminal 2 (terminal 2), and terminal 3 (terminal 3). Among them, there is a fixed resistor connected between terminal 1 and terminal 2, and a sliding contact connected between terminal 3 and terminal 2. When the potentiometer knob rotates, the sliding contact moves on the fixed resistor, thereby changing the resistance value between terminals 1, 2, and 3. Wiring method for external potentiometer speed control: 1. Connect terminal 1 (terminal 1) of the potentiometer to the positive pole of the power supply, terminal 3 (terminal 3) to one end of the load (such as the motor), and terminal 2 (terminal 2) to the other end of the load. In this way, the potentiometer can adjust the working state of the load and achieve speed regulation function by changing the resistance value between terminals 1, 2, and 3. 2. If it is necessary to adjust the resistance of the potentiometer to achieve speed regulation function, please pay attention to keeping the voltage between terminals 1 and 3 unchanged during the adjustment process. This can ensure that the adjustment process does not affect other parts of the circuit. In practical applications, different types of potentiometers can be selected according to specific needs, such as linear potentiometers, exponential potentiometers, etc. Different types of potentiometers have different resistance variation characteristics and can be selected according to actual needs. 4. When wiring, please ensure that the rated power and withstand voltage level of the potentiometer meet the requirements of the circuit to ensure the stability and safety of the circuit.