16 Apr
2008
16 Apr
'08
1:18 p.m.
On Wednesday 16 April 2008 01:34, Jochen Kunz wrote:
On Tue, 15 Apr 2008 16:57:31 -0400
"Roy J. Tellason" <rtellason at verizon.net> wrote:
Correct. I missread the original post.
This is just a guess: If there is some series resistor (for current
limiting) in line with the speaker, this resistor and the capacitor
should construct some sort of low pass filter. I.e.: The speaker is
driven with a square wave voltage that has many harmonics. The low pass
filter can cut off may of the harmonics making a better "sound". The
speaker, as beeing an inert mechanical system, has a low pass filter
"build in".
That makes some sense to me...
And it's likely that there is a series resistor in there, typical speaker
impedances being on the low side and a bit much in terms of loading for the
output of a TTL gate...
--
Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space, ?a critter that can
be killed but can't be tamed. ?--Robert A. Heinlein, "The Puppet Masters"
-
Information is more dangerous than cannon to a society ruled by lies. --James
M Dakin
The
capacitor simply eliminates the DC offset on the signal.
Not the way he described it being connected, across the speaker.