On the afternoon of August 26, 2025, a delegation from the College of Information Science and Engineering at Harbin Institute of Technology (Weihai), led by Professor Wang, visited Donghai Semiconductor Co., Ltd. for a tour and exchange. Chairman Xia Huazhong warmly welcomed the guests and accompanied them through the company’s multimedia exhibition hall. During the visit, the delegation gained a comprehensive overview of Donghai Semiconductor’s corporate culture, development milestones, core products, and technology applications, with particular interest in the company’s achievements in innovation-driven R&D and intelligent manufacturing.

You can test a diode with a multimeter. Pick Diode​ Test or Resistance mode. Always use the right mode to get good results. When you check a diode, look for a voltage drop. It should be between 0.5 and 0.8 volts for standard types. Schottky diodes show about 0.2 volts. To test a diode, put the red probe on the anode. Put the black probe on the cathode. You can test a diode in a circuit or out of it. For correct readings, do not switch the probes by mistake. Many hobbyists see these diodes most often:

You can see fast changes in three-terminal regulator technology. Both international and Chinese companies make new products. Our newest 3-pin voltage regulator series has models like L7805CV and L7812. They use strong TO-220M packaging. They are reliable for industrial use. These products work with more voltage and use less energy. They also have better protection. The three-terminal regulator is still very important. It is used in electronics, cars, factories, and telecom.

You can put in a three-terminal regulator by following easy wiring steps and safety checks. Using a solid state voltage regulator makes things easier, even for people who are new. Safety is very important when you work with electrical parts. Many accidents happen because wires are not connected right or connectors are broken. Each year, more than 2,000 people get hurt and about 150 people die from electrical problems. Some common mistakes are open outlets, using cords the wrong way, and not securing wires well. You should always use a solid state voltage regulator the way the maker says. Checking your work and being safe helps keep you and your devices safe. Donghai Semiconductor makes solid state voltage regulator products you can trust for your projects.

You use a three-terminal regulator by connecting the input to your unregulated voltage source. Connect the ground pin to the circuit ground. Connect the output to your load. Pick the right type, fixed or adjustable, to fit your needs. Always check the pin setup and use the right capacitors. If you forget about the small quiescent current in the ground pin, your current math may be wrong. Using the wrong capacitor can make noise or interference. At Donghai Semiconductor, we design our three-terminal regulator products to help you avoid these common mistakes.

A three-terminal regulator​ helps keep circuits safe and working well. You use a three-terminal regulator to give a steady voltage. This stops devices from breaking. If voltage changes too much, bad things can happen. You might see lights flicker, get hot, or sensors stop working right.

As the demand for efficient and reliable power electronics continues to grow across industries—from renewable energy to consumer electronics and automotive—so too does the need for components that can support higher performance with reduced power losses.

In an era where energy conservation and sustainable development are becoming global priorities, the lighting industry has experienced a technological revolution.

As electric vehicles (EVs) become more mainstream, the demand for faster, safer, and more efficient charging systems is growing rapidly. At the heart of these systems lies a critical component known as the On-Board Charger (OBC). The OBC plays a vital role in converting AC power from a charging station into DC power that can be stored in the EV’s battery. One of the key elements that ensures the smooth and efficient operation of OBCs is the IGBT module​, and specifically, the 20A 100V SBD IGBT module has emerged as a preferred choice for many modern OBC designs.

In today’s digital world, power interruptions are more than just a nuisance—they can cause significant losses, data corruption, and even safety risks. Whether it's in hospitals, data centers, factories, or commercial buildings, the need for uninterruptible power supply (UPS) systems is greater than ever. These systems serve as a critical buffer, ensuring that essential operations continue running smoothly even during power outages or fluctuations.