We believe everyone has read many articles about using a multimeter. The editor has also shared an article titled “Do You Really Know How to Use a Multimeter? A Detailed Explanation of Various Functions and Precautions of the Multimeter.” Mastering the measurement techniques for commonly used electronic components with a multimeter is essential. If you … Read more
Common Electrical Measurement Tools and Their Usage This article introduces the usage methods and precautions for several commonly used electrical measurement instruments, including multimeters, ohmmeters, voltmeters, ammeters, and resistance measuring devices. 1. Briefly describe the method for testing non-marked diodes with a multimeter.Answer: Select the appropriate range; calibrate to zero; measure the forward and reverse … Read more
This article comes from the disassembly event of the Breadboard Community! Rich rewards! (Two DJI drones, two oscilloscopes, etc.)! Electronic engineers hurry to participate 👉 The second round of disassembly to win drones! Benefits upgraded! Previously, we disassembled two multimeters, which were all low-quality counterfeit models that were just usable. This time we are disassembling … Read more
Click on the blue text to follow me! The motor is the most common driving power device in our production and daily life. For example, common toys, fans, water pumps, etc., all have motors. Apart from those that are obviously burnt out, sometimes the motor’s exterior does not show visible damage. How can we determine … Read more
　　A multimeter, also known as a multimeter, three-use meter, or multifunction meter, is a versatile measuring instrument that can measure direct current (DC) current, direct voltage, alternating voltage, resistance, audio levels, and more. Some models can also measure AC current, capacitance, inductance, and certain parameters of semiconductors (such as β). 　　Measuring AC voltage: As shown … Read more
The first pointer meter used to detect current was called a galvanometer, invented in 1820. When used in conjunction with a Wheatstone Bridge, it can compare an unknown resistance and voltage to known voltages and resistances, thereby measuring related voltages, currents, and resistances. This method of measurement in the laboratory is time-consuming and labor-intensive, making … Read more
The digital multimeter is a powerful assistant for measuring electrical signals. Although it is called a “universal” meter, its common functions are limited to measuring voltage, current, and resistance. Voltage and current measurements also include AC and DC ranges. In addition, some multimeters can measure inductance, capacitance, continuity, diode forward voltage, transistor current gain, counting … Read more
China’s High-Speed Rail Goes Global, Railway College Achieves the Future -Click the blue text above to follow the official WeChat account of Xi’an Railway Technician College’s Academic Affairs Office- Today, let’s learn how to use a multimeter with the students from Class 34 of the Fall 2020 Pre-College Mechanical Inspection.First, the teacher presented the knowledge … Read more
Measuring DC Voltage with a Multimeter (Task: Measure 9V Battery, 1.5V Battery) (1) When measuring DC voltage, identify the positive and negative terminals (the red probe connects to the positive terminal “+”, and the black probe connects to the negative terminal “-”). Connect the multimeter in parallel to the circuit being tested. Before measuring the … Read more
This article mainly introduces the design principles of digital multimeters and the calculation methods for average value and true RMS value, explaining the defects of the average value calculation method and the calculation method for true RMS value of AC signals superimposed with DC signals. It emphasizes the necessity of using multimeters with true RMS … Read more