14 Oct
2008
14 Oct
'08
1:39 p.m.
Tony Duell wrote:
Incidentally, I saw a 2.7kF (no, not a typo!)
low-voltage electrolytic in
a catalogue recently. And to think that when I was at school the physics
'teacher' told us that a 1F capacitor would be 'larger than this room'
and that we'd never seen on. About a week later I dropped a square plasic
object on his deck -- a 1F capacitor that I'd bought from Farnell or
somewhere.
I remember having a similar conversation with my 'O' Grade Physics
teacher in high school, about how a 1F capacitor would be huge and
impractical. "Hang on a sec", I thought, "I've got 1000uF capacitors
and they're about the size of my thumb. My Dad's got 10000uF capacitors
for his audio amps, and they're the size of a coke can. I reckon 100
such capacitors would fit in my schoolbag, at worst..."
And that's how I learned that school wasn't going to teach me anything
useful, or basically true.
Gordon