The microcontroller’s CPU, while processing an event A, receives a request to quickly handle another event B (interrupt occurs); the CPU temporarily interrupts its current work to process event B (interrupt response and interrupt service); upon completing event B, the CPU returns to the original point of event A that was interrupted to continue processing … Read more
This article begins by introducing microcontrollers from the perspective of integrated circuits, mainly covering the pin diagram and functions of microcontrollers, as well as basic programming. First, let’s take a look at the functional block diagram of the 80C51 microcontroller. The 80C51 microcontroller belongs to the MCS-51 series and uses a 40-pin dual in-line package … Read more
Since the introduction of PLCs in the 1960s in the United States to replace traditional relay control devices, PLCs have rapidly developed and been widely applied around the world. At the same time, the functions of PLCs have continuously improved. With the ongoing advancements in computer technology, signal processing technology, control technology, and network technology, … Read more
1. Introduction Many beginners in microcontrollers often ask me, “I am currently a microcontroller beginner, how can I learn it faster? Where should I start?” Regarding this question, I would like to share my thoughts on how I learned microcontrollers, how to get started, and how to become proficient. First, let’s talk about microcontrollers. The … Read more
A microcontroller is a type of programmable controller that, after setting up the hardware circuit, can use programs to implement many very complex logical functions. Compared to pure hardware circuits, it simplifies the design of hardware peripherals, facilitates logical design, and enriches logical outputs. Different manufacturers of microcontrollers require different programming IDEs to achieve programming. … Read more
1. Choosing Pull-Up Resistors for Microcontrollers As can be seen in the reset circuit, when resistor R1=10k, RST is high, but when R1=50, RST is low. Clearly, R1=10k is incorrect, as the microcontroller remains in the reset state and cannot function. This occurs because the RST pin contains a transistor, which allows a small cutoff … Read more
Differences Between PLC and Microcontroller 99% of Electricians Have Saved This Mid Year Summary Many beginners often confuse PLCs and microcontrollers. Today, let’s discuss what the differences are: PART 01 What is PLC PLC is short for Programmable Logic Controller. It is a digital electronic device with a microprocessor, equivalent to a small computer, used … Read more
Many engineers prioritize learning the 51 microcontroller when starting with embedded systems due to its low cost, abundant resources, and wide application fields. However, there are many misconceptions when learning the 51 microcontroller. This article will briefly discuss three common misconceptions. 1. The 51 Microcontroller is the Foundation for Learning This viewpoint may have been … Read more
Can Microcontrollers Replace PLCs? Microcontrollers cannot completely replace PLCs. Although microcontrollers can achieve similar functions through programming, they are relatively less reliable and stable compared to PLCs. PLCs are widely used in industrial control and automation due to their excellent programmability, real-time performance, and stability. PLCs have several advantages over microcontrollers, which make them irreplaceable … Read more
It is well known that microcontrollers are the core of embedded development. To master microcontrollers, the choice of programming language is also crucial. However, if you have explored the programming languages for different microcontrollers, you will find that most people use C language. There is even a saying that “microcontrollers cannot do without C language.” … Read more