Yes, quite right the current would be a bit low, on reflection I thought 470R might be a bit low as that is a 0.5A limit and LEDs are a bit peak sensitive. I chose the high voltage version of the diode because they are cheap and because I didn't want a failure of the LED to ripple through and cause the failure of the diode (single fault safety principle & all that) but wasn't clever enough as failure of the diode will result in the LED popping.
Ah - missed that bit. You should have included it in the equation. ;-)
The Natural Philosopher wrote in news: snipped-for-privacy@despina.uk.clara.net:
I'd have used a 4006, perhaps I never got as far down the list as 1N4007.
Any how, I use a 4006 for absolutely every general purpose silicon diode, I'v used zillions (nearly)
Perhaps I lack imagination :)
mike
Maplin's green neons are an amber neon with a green lens. It gives a sort of dim s*it colour, literally.
Real green neons used to be available (actually, they were fluorescent, utilising the UV lines from a discharge). Not seen them for some time, and they didn't have the same life as regular neons.
If you connect at peak (340V), it's 0.7A, which will damage most
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