audio recording on IC -help wanted

Thu Jul 30, 2009 7:08 pm   

"Joel Koltner" <zapwireDASHgroups_at_yahoo.com> wrote in
news:3Wlcm.493461$6p1.334514_at_en-nntp-02.dc1.easynews.com:


That's exactly how I improve code when I write it, I look at what aorks best
and always revisit to see if there;s a further improvement because there
often is. But there is also context. In several posts here I've accounted for
the context of my decision to try this LM317 wheeze. There's no reason not to
try it, and a few good ones to try it.

Thu Jul 30, 2009 9:00 pm   

Tim Williams wrote:


"Sniveling Idiot". ;-)


--
You can't have a sense of humor, if you have no sense!

Fri Aug 07, 2009 12:29 pm   

On Fri, 24 Jul 2009 04:01:01 -0500, Lostgallifreyan
<no-one_at_nowhere.net> wrote:


For an all but clueless first cut i think you would need a four
terminal device, to include the transport of emitted photons.

Fri Aug 07, 2009 1:18 pm   

"JosephKK"<quiettechblue_at_yahoo.com> wrote in
news:3e7o75h7m29qpd1ca55o00bl96ivfn6msq_at_4ax.com:


Yes, I was sent an Intusoft newsletter that contained just such an animal,
but it's based on a Hitachi 3mW IR diode, I think. But as a 'dead' diode with
facet damage from ESD or other surge usually behaves very similarly to a live
fresh one, electrically, AND most high power diodes have no monitor
photodiodes anyway, there's nothing wrong with only two terminals. What is
then critical, if it's to be driven hard, is to include temperature
monitoring in the model. In practise diodes will vary but the setting will be
a set-and-forget one based on a single measurement of power at maximum drive,
once the thermal compensator works. I did this once (before I ever looked
into spice) using an LM317 and some thermistors in the sense resistance
network. It sounds crude, but I calculated it in some detail, and it worked
well. Apart from that LM317, the entire driver was discrete passive parts.
(Wasn't modulated though, have to add stuff then.)

Fri Sep 11, 2009 10:30 pm   

You noticed the cross-posting; this was also multi-posted.
This spammer is a 1-trick pony:
http://groups.google.com/groups/search?enc_author=VH8HkCUAAABao2jumPzMV4lt0Ss00ePnixa6E0eetrkPH3BIwN2wzDNkEozqbodaZ7xQDlJcpTo&scoring=d
You might drop a note to
mailto:abuse_at_arcor-ip.de abuse@ arcor-ip.de

Sat Sep 12, 2009 10:38 am   

JeffM <jeffm__at_email.com> wrote in
news:7c779e0e-c1cf-4f05-8f9e-6a8207be1d99_at_q7g2000yqi.googlegroups.com:


If it happens again, I will. I didn't do more than delete it this time,
because if it happens again I want to know. Most times I let it pass, just
filter it out because spam is rarely interesting.

Sun Sep 13, 2009 4:14 pm   

Lostgallifreyan wrote:

I'm local to the spammer, & I've sent off a complaint to his/her university.

--
W
. | ,. w , "Some people are alive only because
\|/ \|/ it is illegal to kill them." Perna condita delenda est
---^----^---------------------------------------------------------------

Tue Sep 15, 2009 3:13 am   

Lostgallifreyan wrote:

Melb Uni have promised me that they're going to do something about their
spammer.


--
W
. | ,. w , "Some people are alive only because
\|/ \|/ it is illegal to kill them." Perna condita delenda est
---^----^---------------------------------------------------------------

Tue Sep 15, 2009 10:46 am   

Bob Larter <bobbylarter_at_gmail.com> wrote in
news:h8n0jl$8dt$2_at_blackhelicopter.databasix.com:


Cool, nice if you have someone responsive to talk to. Last time I tried it
was like dropping money into an oubliette and calling it a wishing well.
Not that oubliettes aren't cool, in a sinister kind of way.

Fri Oct 02, 2009 2:43 pm   

On Fri, 2 Oct 2009, Bill wrote:


because you don't want the capacitor. Headphones are the thing that's
likely to break first, and you've ended up with a situation where the user
will then end up not being able to use the gizmo since they have to order
the headphones from some single source in New Jersey.

I have a headphone jack on the car radio that I use as a bedside radio. I
put the capacitor on it so I could use a single output of the car radio to
feed the headphones. I sure didn't need the extra power of balanced
output, and the capacitor was hardly "large". You should have been around
forty years ago, then a 10,000uf capacitor at 17v was the size of a coke
can. Now, it's not any extra size.

Since this sort of thing is dealt with all the time in commercial
equipment, you've made the issue more complicated than necessary. They
live with the usual headphones, and thus they must live with the "nasty"
output capacitor. On the other hand, my Sansa Fuze is small enough that
there must be miniscule capacitors at the needed capacitance, since all of
the unit complete with batteries and LCD screen is jammed in that tiny
package.

Michael

Fri Oct 02, 2009 7:32 pm   

On Fri, 2 Oct 2009 10:43:38 -0400, Michael Black <et472_at_ncf.ca> wrote:


No, they must not live with the output capacitors. You can avoid them
with a dual supply (or with charge pumps if you run from an explicit
single supply). I'd bet that's what they do in tiny MP3s, etc.

It's only that I don't want to use noisy circuits like charge pumps,
and I don't have a dual supply.

Best

Sun Oct 11, 2009 8:14 pm   

On Sun, 11 Oct 2009 14:26:54 +0200, brute wrote:


<snip>

Posting to Usenet in HTML is *NEVER* awesome.

--
"Electricity is of two kinds, positive and negative. The difference
is, I presume, that one comes a little more expensive, but is more
durable; the other is a cheaper thing, but the moths get into it."
(Stephen Leacock)

Tue Nov 10, 2009 8:41 am   

On 23:10 9 Nov 2009, Arno wrote:


The home made mod doesn't seem to have as much protection from
intereference.

Ready made rounded PATA/IDE cables arrange the wires (signal and
ground) as twisted pairs.

Don't know how much difference this makes.

Tue Nov 10, 2009 9:53 am   

Hi!

Vince wrote:

Actually, a lot. Therefore, creating "home-made" ATA cables from
ordinary ATA cables is not a very good idea.

Best regards,

Iggy

Tue Nov 10, 2009 9:58 am   

Vince wrote

True, but neither did the original 40 wire cables either.


Some do, some dont.


Not much.