OOOOkay, I'm not seeing the humor. Either reverse biasing an LED will in
> fact turn it off (page 65) or somebody reinventing 4000 series logic on page
> 66. Which one is the knee-slapper?
>
> Jim
There's an (inadequate) 1N914 diode to protect the LED from the 100-150v, reverse bias but the diode is saved by the fact that the TL431 has max V(KA) of 37V
Bye. Jasen