The oscilloscope is one of the most versatile tools in the toolbox of electronic engineers and enthusiasts. It converts voltage signals into waveforms that change over time, allowing users to observe related information such as signal frequency, amplitude, and noise. Modern Oscilloscopes Almost all application electronics, electrical laboratories, or workbenches have an oscilloscope, and many … Read more
Understanding Oscilloscope Probes The measured signal cannot be directly connected to the oscilloscope, so a device is needed to establish an electrical connection between the test point and the oscilloscope. Depending on the needs, this device can be a simple wire or a more complex circuit. The device responsible for linking the test point and … Read more
Among various sensing technologies, the most commonly used and widespread method for detecting magnetic fields is the Hall effect method. Based on the Hall effect, many Hall effect sensors or transducers have been found in various applications, primarily used for sensing proximity, speed, current, and position. This is due to the ability to construct Hall … 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
Steps for Using an Oscilloscope: An oscilloscope can observe various electrical signal amplitudes changing over time, and based on this, it can be used to measure parameters such as voltage, time, frequency, phase difference, and modulation depth. Below are the steps for using an oscilloscope to observe electrical signal waveforms. 1. Select Y-axis Coupling Method … Read more
Every hardware engineer learning embedded systems should have DIYed an oscilloscope at least once, not only because this process allows you to truly touch the soul of embedded systems, but also to deeply understand the core concepts of testing and measurement – after all, when you personally collect waveforms, display them, and measure parameters, the … 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
1. Measuring AC and DC Current Select the appropriate current measurement range based on the size of the current to be measured, and insert the red probe into the “A” current jack. When measuring DC, the red probe (inserted into the current jack) should contact the higher voltage side, and the black probe should contact … Read more
To avoid damage to the multimeter, please pay attention to the following points. 1. Most digital multimeter damages are caused by incorrect measurement range settings. For example, when measuring AC mains voltage, if the measurement range is set to resistance, the moment the probe contacts the mains, it can instantly damage the internal components of … Read more
1. Precautions for Using a Multimeter (1) Before using the multimeter, perform “mechanical zeroing”, which means setting the multimeter pointer to the zero voltage or zero current position when there is no measured electrical quantity. (2) During the use of the multimeter, do not touch the metal parts of the probes with your hands. This … Read more