I think the first thing people challenge themselves with when they get interested in electronics is the so-called "LED blink." This is the basic of electronics, making an LED flash, and it's the first ...

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 ...