In article , David W.E.
Roberts writes
Hi,

I have discovered the fatal flaw in my pull switch and humidistat bathroom
fan.

I cannot tell if the humidiatat is on or the pull switch is on.

I have worked out the wiring (which is how I first proved that the
humidistat was on most of the time) but I would like to fit a small LED
which only lights when current is passing through the switch.

To do this I need a 240v LED which can be mounted in a small hole in a
plastic casing.

Looked in Maplins but can't find a 240v LED - although most don't seem to
have a voltage rating.

Any ideas/sources?

use a neon, not an LED. You can wire up LEDs to work at 240V but it
would be far simpler to use a mains neon, which would give a very
similar effect.
--
Tim Mitchell