Throwing Down an LED where the Potential is great

I saw this post on Instructables where someone asked how they could add an LED on to a high-voltage source. And for reasons I can’t explain, I just felt compelled to take a crack at it…

On the surface it’s a pretty boring/simple question. But on the other, as much as I’ve answered this question for myself several times, I thought I’d provide my approach for the world to judge. Supposedly I’ve learned how to do this (and a lot more) in school, but it seems to me like the basics like this are worthy of most of the attention.

I used this remarkable Circuit Simulator to explore my solution in somewhat better-than-paper regard and learned that the internal resistance of LEDs is probably a lot more than I thought. I also checked in a few forums and this nice website in an effort to validate my approach, it seems like a favored approach.

In the tradition of Salman Khan, I decided I’d put together my own video and see how it goes…

Comments?