Current Flowing Indicator.

[Skywave]

By the way, why do we call them "1000μF" capacitors rather than "1mF?"
- Joe

Tradition - and the possibility that "mF" could be easily confused with "mfd" - micro-farad. Now and then, I still think in terms of 'condensers'.

Values like 0.001μF are now usually expressed as 1nF so why doesn't the same logic apply to bigger ones?
- Joe

The same argument applies. Before the adoption of the letter 'n', which denotes 'nano', I always used to write 'kpF': kilo-pica farads; made sense to me.

I always said the Jar was a more sensibly sized unit.
- Joe

Quite; my favourite Jars are the ones that contain a particular alcoholic beverage, but next time I'm down at my usual watering-hole, I can't exactly see myself requesting "1000 mF of your best ale, please!"

Al.