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:

In the world of electronics, the diode​ is one of the most essential and frequently used components. Whether you're working on a power supply, charger, LED lighting system, automotive stereo, or even a battery management system (BMS), chances are you're dealing with diodes. It’s critical to know that the diode is working properly before integrating it into your circuit—and that’s where a multimeter comes in.

If you've ever wondered how electricity flows in your mobile charger, electric vehicle battery management system (BMS), or even your LED lighting setup, chances are you've encountered one of the most essential and underrated components in electronics—the diode​. From enabling current flow in a single direction to protecting circuits from voltage spikes, the diode does far more than most people realize.