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A Guide to AVR Microcontroller [PDF]
15 October 2025
AVR microcontroller is an enhanced RISC (Reduced Instruction Set CPU) high-speed 8-bit microcontroller with built-in Flash developed by ATMEL in 1997.
Top 10 IC Design Companies in China
13 January 2022
In recent years, China has become the world's largest semiconductor market, consuming a large number of semiconductor chips every year. Driven by market applications and with the support of the National Semiconductor Fund, China's semiconductor industry has achieved rapid development, and a number of representative semiconductor IC design companies have gradually emerged. Let's take a look at the current top ten IC design companies in China.
Ohmic Resistors: Differences, Laws, and Applications
18 March 2026
This article explores the fundamentals of ohmic resistors, which obey Ohm's Law and exhibit a linear voltage-current relationship. It contrasts them with non-ohmic resistors, whose resistance varies with voltage, current, or temperature. Key topics include graphical analysis, practical applications in circuits, and the impact of material choice and temperature. The article also highlights common pitfalls, real-world usage, and tips for selecting the right resistor. Understanding ohmic resistors is essential for effective circuit design, offering predictability, reliability, and simplicity across a wide range of electronic systems, from beginner projects to advanced engineering applications.
In-Depth Analysis of Q1 2026 Memory Chip Market & Stocking Guide
13 March 2026
2026 Q1 memory market analysis: DRAM and NAND Flash prices are surging due to HBM capacity constraints at Samsung and SK Hynix, with some server memory prices up over 60%. Utmel provides the latest market insights and procurement advice for DDR4, DDR5, and enterprise SSDs.
NPN Transistors and PNP Transistors
29 October 2020
NPN and PNP are two types of transistors. Transistors are semiconductor devices made of doped p-type and n-type junctions. This article mainly introduces the differences between this two kinds of transistors, the methods of distinguishing them, and the application of them.
What is RF Filter?
09 December 2021
Hello, I am Rose Welcome to the new post today. The radio frequency filter is a filter circuit made up of capacitors, inductors, and resistors that is used to filter the signal frequency in communication channels. The filter allows signals that meet a specific frequency to pass while suppressing unwanted frequency signals.
Top Chinese Photoresist Manufacturers Guide
07 January 2022
Since the second half of 2020, the global semiconductor industry's prosperity has continued to rise, and the upstream photoresist market is no exception.
What are the Types of Audio Cables?
27 October 2021
Today, I will introduce you to some common audio cables. I hope you will have a new understanding of the cable of the audio equipment.
Facial Recognition: Features, Working and Applications
02 September 2021
The broad sense of facial recognition includes a series of technologies for building a facial recognition system, including face image acquisition, face positioning, facial recognition preprocessing, identity confirmation, and identity search, etc… The narrow sense of facial recognition refers specifically to the adoption of the system for confirming or finding the identity of a human face.
Introduction to TFT Displays
29 August 2020
TFT Display is a thin film transistor type liquid crystal display. TFT liquid crystal is equipped with a semiconductor switch for each pixel, and each pixel can be directly controlled by dot pulses. So each node is relatively independent and can be continuously controlled, which not only improves the response speed of the display screen, but also allows precise control of displaying color gradation, so the color of TFT liquid crystal is truer.
How to Design Reliable High-Side Switching Circuits with P-Channel MOSFETs?
22 July 2025
This article provides a comprehensive guide to designing reliable high-side switching circuits using P-channel MOSFETs, drawing from a real-world failure case shared by a Reddit user. The main issue identified was that the user's 48V system damaged the MOSFET because the gate-source voltage exceeded the device's ±20V limit (reaching -48V), and the article offers complete solutions including proper MOSFET parameter selection, using Zener diodes to clamp gate voltage, optimizing driver circuit resistor values for faster switching, and adding flyback diodes for inductive load protection, serving as a practical design roadmap for beginners in power switching applications.
Arduino Based Gas Leakage Detection
29 August 2023
A gas detector is a safety device that identifies the presence of gases in a particular location. It is often part of a safety system and can detect gas leaks and other emissions.