1. Characteristics and Repair of Capacitor Failures in Industrial Control Circuit Boards Failures caused by capacitor damage are the most common in electronic devices, especially with electrolytic capacitors being the most prevalent. Capacitor damage manifests as: Reduced capacity; Complete loss of capacity; Leakage; Short circuit. Since capacitors serve different functions in circuits, the characteristics of … Read more
Must-Read Books for Learning PLC (E-book Download Link) The inverter circuit board mainly includes the power board, control board, driver board, and panel. 1. Resistor Resistors are represented by the letter R on the circuit board, with units including: ohms (Ω), kilohms (KΩ), megohms (MΩ). Resistor symbols include: 1. Fixed resistors, adjustable resistors, special resistors … Read more
This circuit diagram describes a boost converter circuit used in back-end power systems, aimed at raising the input low voltage to the required output voltage. Below is a detailed explanation of each part and its function: 1. VBST_BE_IN (Input Voltage) Function : This is the input voltage of the boost converter. It typically comes from … Read more
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
Whenever a circuit board fails to operate normally, and the wiring checks out, it is very likely that an electronic component has failed. To repair it, you must identify the faulty component and replace it. However, locating the faulty component requires technical skills and certain techniques. Today, I will teach you how to use a … Read more
A multimeter comes in two types: one is a digital multimeter, and the other is an analog multimeter with a needle display. Regardless of the type, it generally has functions for measuring AC/DC voltage, AC/DC current, resistance, and more. Before measuring, it is essential to correctly select the measurement range of the multimeter; this is … Read more
1. Measuring Capacitor Health with an Analog Multimeter To measure the health of a capacitor, it is best to use an analog multimeter as it provides a more intuitive reading. Here, we will use an analog multimeter to illustrate how to measure a capacitor’s health. First, to measure the capacitance, set the multimeter to the … Read more
1. Introduction Originally, I needed to use the front end of the oscilloscope probe to create a shielded connection, but unexpectedly, when disassembling the front end, I discovered a strange part inside. It seems there is a small capacitor within this structure. 2. Internal Structure To minimize the impact on the circuit being measured, the … Read more
In order to adapt to the rapid update of electronic products, product design engineers tend to choose AC/DC adapters that are easy to procure in the market and directly install multiple DC power supplies on the system’s circuit board. Since the electromagnetic interference generated by switching power supplies can affect the normal operation of electronic … Read more
Experimental Scene 1 Introduction Since learning Bluetooth communication with ESP32 and Phyphox during the National Day holiday in 2020, the author has been eager to solve the visualization problem of the relationship between capacitor voltage and charge, attempting to derive the charge amount by integrating the charging current, and then depict the charge-voltage relationship graph. … Read more