11 Jun
2009
11 Jun
'09
12:45 a.m.
Warren Wolfe wrote:
Erm... I doubt this. I saw a 2 farad cap at a
surplus place in Lima,
Ohio. It was rated at 12 volts, and looked like a sawed-off oil drum.
That's
much older technology. As others here have observed, you can now
get a 100F capacitor that is quite compact, though they have voltage
ratings between 2V and 2.7V.
I think there's some sort of square-cube thing
going on here that
makes ever-increasing values of capacitance ever huger.
Not really. For a given
technology, the volume is roughly linearly
related to the product of the capacitance and voltage.