Re: Prob. a very basic Q re: capacitors

Rich Grise <rich@xxxxxxxxxxx> wrote in
news:pan.2008.07.30.00.23.22.884167@xxxxxxxxxxx:

On Tue, 29 Jul 2008 09:21:36 -0700, Joerg wrote:
Rich Grise wrote:
On Mon, 28 Jul 2008 12:09:13 -0500, Kris Krieger wrote:

How is the flow of power out of a charged capacitor be controlled?
I've been loking at whatever circuit diagrams I can fond that use
supercapacitors as an energy source, and I'm not clear on whether
control is via the resistors, or transistors.

Supercaps are NOT an energy "source" - they'd be a storage medium,
at best, and they even suck at that.

A battery can store millions of times as much energy as a cap.

But it'll die of exhaustion pretty soon. a lot of stuff gets thrown
in the trash because the rechargeables are nearly dead and too
expensive to replace. Adding Cadmium and other goodies to the
landfills.

Admittedly, caps don't wear out, but what's the energy density of one?
OP is talking about using supercaps in lieu of batteries, and that's
just stupid.

I saw some solar LED lighting products (esp., "solar bricks" and road-lane-
markers) that already use capacitors as batteries. Maybe you ought to find
the products online and write to their manufacturers - I'm sure they'd
greatly appreciate being enlightened about their stupidity.

[snip]
.

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