> The page also claims that you can configure an output pin to drive an LED
> so that it lights when the pin goes *low*... Man, electronics is weird!
Why is that weird? The LED doesn't care which leg is connected to the logic
output pin, it's just a voltage. You could even connect the LED between two
output pins*, then it would only turn on when one was high and the other was
low.
* Using a series resistor if required...
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