1 Before we begin, let’s talk about semiconductors. A semiconductor is a material with electrical conductivity that falls between that of conductors (like metals) and insulators (like ceramics). It acts like a smart switch, sometimes allowing current to pass through and sometimes blocking it. This property makes it an ideal material for controlling current. Next, … Read more
Electrician Vocational Skills Level Certificate Examination Study For the “Electrician” Level 2/Technician Learning Examination, the key learning points for PLC controllers can be focused on the following key areas: 1. Basic Principles and Structure of PLC Working Principle: Understand the cyclic scanning working method of PLC, including input sampling, program execution, and output refresh stages, … Read more
From diodes to nanoscale chips, the working principles and precision manufacturing processes of semiconductor devices form the physical foundation of the digital age. Semiconductor devices are the cornerstone of modern electronic technology, essential for everything from smartphones and computers to new energy vehicles and industrial control systems. The core function of these devices lies in … Read more
Utilizing the unidirectional conductivity of diodes allows for the design of interesting and practical circuits. This article shares an analysis of how clamping circuits and limiting circuits are implemented using diodes. Limiting Circuit As shown in the figure below, when in the positive half-cycle, and VIN is greater than or equal to 0.7V, the diode … Read more
In the design and manufacturing process of PCB circuits, electronic components and devices play a crucial role. However, due to various influencing factors, some components are more prone to damage and failure than others. Do you know which components they are? The answer will be provided below. 1. Capacitors Capacitors are one of the common … Read more
Testing Transistors: 1. Testing Small Power Transistors A. Identifying Positive and Negative Electrodes (a) Observe the symbol markings on the casing. Typically, the casing of the diode is marked with the diode symbol, where the end with the triangular arrow is the positive electrode, and the other end is the negative electrode. (b) Observe the … Read more
Screenshots of electronic books within the resource collection [Complete Set of Hardware Learning Materials Collection]
Source: Fresh Date Classroom Original Author: Xiaozao Jun This article describes the birth of chips – from vacuum tubes, transistors to integrated circuits, from BJT, MOSFET to CMOS, how chips have developed and how they work. █ Vacuum Tubes (Electronic Tubes) Edison Effect In 1883, the famous inventor Thomas Edison observed a strange phenomenon during … Read more
Introduction On the third day of the Lunar New Year, we built an experimental circuit on a breadboard to “plot the I-V characteristics of a diode in the conducting state.” A programmable resistor board was used as the internal resistance of the ammeter, a potentiometer was used as a variable resistor to control the circuit, … Read more
To gain a deeper understanding of the CPU, the master craftsman spent a full six months to “solder point by point” and made a CPU by himself, as shown in the masterpiece below. Related articles:How does the CPU recognize the code we write? According to the master craftsman, he mainly used the following three raw … Read more