why did this touch thing happen?
when I exactly reversed the transistor's collector-emitter order
is there a quick(er) way of knowing (without datasheet) which end is emitter, which the collector of a transistor like this?
So it seems, as do Arduino inputs unless pulled-down or pulled-up, the human body is acting like an antenna and picking up signals from the air, but scientifically, what exactly is happening?
I'm only touching one end of the resistor (with my body closing that circuit to neither + nor GND), meaning the circuit is still floating, so what exactly is activating the transistor base to let current flow through the LED?
Scientifically, electromagnetic radiation is being converted to the flow of electrons by your body