A flip phone that integrates the mechanical watch part on the front of the cover and uses a special movement to ensure its ultra-high operating accuracy. The appearance is very complex, which is compl
Traditional power strips can usually only be used to simply control the power switch, but in order to achieve the goal of more energy saving, a company has specially developed such an energy-saving pr
I am now using 8V, 5-inch current limiting resistors of 10 ohms per segment and 6V, 3-inch digital tubes with current limiting resistors of 100 ohms per segment, and the voltage is 12V. The phenomenon