I found an incandescent filament-style numeric display tube (Numitron) called the "IV-9" that I bought a long time ago, sleeping in the back of my desk. Thinking, "If I don't touch it now, it might ...

"Just by talking to AI, real-world objects move." I realized this sci-fi-like experience through a small experiment of making an LED light up. It sounds difficult, but the mechanism is very simple. In ...