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shalafi71 t1_j7ntsek wrote

Reply to comment by ItDoesntMatter59 in TIL the first Blue LED wasn't commercially available until 1989 and bright blue LEDs weren't available until 1993. by j-merc23

I was arguing with a (much smarter) friend about resistors one day. He insisted that if you got the voltage right, you didn't need one. "Dude, LEDs pull amps until they burn, sometimes instantly. You have to either get stupid lucky with current and voltage or you have to use a resistor."

To this day he doesn't believe me. "Dude, take a $1 store light apart, there's a resistor soldered onto the hot lead. Every. Time. Why would China put unneeded parts in there?!"

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