How to use a multimeter? This is a small problem for many new electricians or home users; having a multimeter but not knowing how to use it. Today, we will talk about the functions of the multimeter. The multimeter is an essential measuring instrument for electricians, primarily used for measuring voltage, current, and resistance. Multimeters … Read more
1. Appearance of the Multimeter. A multimeter is an instrument used to measure parameters such as voltage, current, and resistance. There are two types: analog and digital, and its appearance is shown in Figure 1. Figure 1 Multimeter 2. Preparation Before Using the Multimeter. (1) Place it Horizontally. Place the multimeter horizontally. (2) Check the … Read more
This is a supplement to previous content. Earlier, we published an article on measuring breakpoints, and many friends mentioned the use of multimeters. Indeed, we have published relatively little content on the use of multimeters, but they are quite versatile in practical projects. So let’s explore this topic together. 1. What is a Multimeter Also … Read more
Click on “Technical Training” above, and select “Top Official Account“ 160,000+ industrial control professionals follow our WeChat platform: technical sharing, learning exchanges, industrial control videos A multimeter is an essential troubleshooting tool for electrical maintenance personnel. The phrase “one person, one pen, one meter” vividly illustrates the basic requirements for electrical workers: electrician + test … Read more
Search on WeChat Technical Training The clamp multimeter is composed of a current transformer and a meter. The core of the current transformer can open when the clamp is tightened; the wire carrying the current to be measured can pass through the gap of the opened core without being cut, and when the clamp is … Read more
How to use a multimeter? This is a small challenge for many beginners or hobbyists who have a multimeter but don’t know how to use it. A multimeter is an essential measuring instrument in the electrical and appliance industry, primarily used for measuring voltage, current, and resistance. Multimeters are classified into analog multimeters and digital … Read more
1. Introduction Previously, we tested the input voltage characteristics of the ports in the STC32C030 microcontroller. A signal source DG1062 was used to generate a peak 10V sine AC signal. It can be observed that the voltage at the microcontroller’s IO port is limited to around 9V. So what are the specific characteristics of the … Read more
1 Introduction Recently, I have been troubled by various trivial matters, and my mind has been restless. Seeing that members of the “Phyphox Bluetooth Experiment Development Group” WeChat group are releasing new works every day, I was also eager to try. Following the example of Teacher Mei from Beijing, I conducted an experiment to “plot … Read more
Introduction This article will continue to delve into the issue of current backflow, analyzing the root causes of IO port damage and system stability problems in embedded systems. In the previous engineering notes, we learned about current backflow and discussed a series of problems it may cause, including IO port damage, system crashes, failure to … Read more