Few people know about this feature of the Laptop Power Supply 

⭕️Amazing way to sharpen a knife to razor sharp!
• Amazing Way to Sharpen...
What can be done from a laptop power supply. This video shows what a laptop power supply is capable of, in addition to its main function. How to make a simple DIY from a power supply unit that will be useful for welding small parts or wires. A useful invention for the workshop, which is easy to make from a power supply unit from a laptop. Few people know about this feature.