Note to others: Don’t do this unless you’ve verified that your particular LED already has the resistor built into it, which is how those work.
Otherwise, hooking a bare LED up to DC voltage tends to eventually convert it to a smoke emitting diode, especially since LEDs have an inverse temperature/resistance relationship. The hotter it gets the lower its resistance becomes so the more current it draws so the hotter it gets so the lower its resistance becomes so the more current it… pop.



















Correct. They only care about this stuff because they don’t want anyone to use it on them.
If you don’t believe me, just note how basically every single weapons ban written in the US magically has an exception for law enforcement carved into it. So… We (not me, but all you Californian people) can’t have, say, a butterfly knife but for some reason the cops can? What do they need it for that we don’t, exactly?