sci.electronics.repair Google Group

Re: CFL on photo on/off?

nob...@but.us.chickens (David Nebenzahl) — Fri, 12 mar 2010 19:41:27 UT

On 3/12/2010 10:52 AM Meat Plow spake thus:
Yup, that would be a good place for a CFL. (Assuming it plays nicely
with the controller, that is.)

Re: Coax cable used for DC instrumentation

whit...@gmail.com (whit3rd) — Fri, 12 mar 2010 19:33:49 UT

What do you mean, 'noise'? Pickup from heavy machinery?
Thermal resistor noise? Limited ADC resolution?
And what IS your signal? Source impedance and bandwidth are
important.
There are lots of signals (like a thermocouple output) that would
work better without coaxial cable, and lots of solutions (like

Re: Insignia NS-HDTUNE Take Apart/Exploration

nos...@today.com (Klaatu) — Fri, 12 mar 2010 19:25:36 UT

Ah yes, of course, mindless immature insults. Typical.
Poor meat head.

Re: Zeners in series...

whit...@gmail.com (whit3rd) — Fri, 12 mar 2010 19:15:21 UT

If the little blobs at crossing points are to be trusted, C603 isn't
in series there,
and it doesn't limit the current. Winding resistance and rectifier
series
resistance are all I see on this winding leg.
It appears that the whole rectifier/zener assembly is there to limit
AC excursions
of that leg of the transformer winding (the OTHER leg of the

Re: Zeners in series...

dpl...@radagast.org (Dave Platt) — Fri, 12 mar 2010 19:03:57 UT

In article <rJomn.134582$813.30...@tornad o.fastwebnet.it>,
It appears to me as if they are, as you say, working as a voltage
stabilizer / regulator.
There is a resistor present, to limit the current flowing through them
and through the rectifier. If you trace out the inputs to the
rectifier bridge, you'll see that one side goes back through

Re: CFL on photo on/off?

Fri, 12 mar 2010 18:52:02 UT

On Fri, 12 Mar 2010 10:42:15 -0800, David Nebenzahl
But it would be ok for a dusk to dawn security light?

Re: Update: 3.3V vs. 3V dilemma

grizzledgee...@comcast.net (William Sommerwerck) — Fri, 12 mar 2010 18:44:59 UT

The usual term is "hermaphroditic connector". "Jug" suggests something
female. "Plack" is better, but it's a homonym of two other words.

Re: CFL on photo on/off?

nob...@but.us.chickens (David Nebenzahl) — Fri, 12 mar 2010 18:42:15 UT

On 3/12/2010 7:02 AM William R. Walsh spake thus:
Keep in mind that CFLs are often not good candidates for this kind of
application, because the length of time they take to warm up is often
the same as the length of time they're on, so they don't do a very good
job of lighting up the area you want illuminated. For an intermittent

Re: Update: 3.3V vs. 3V dilemma

nob...@but.us.chickens (David Nebenzahl) — Fri, 12 mar 2010 18:39:39 UT

On 3/12/2010 7:23 AM Phil Hobbs spake thus:
>
Mmmm, don't think so. I can see inside the sleeve in the camera that
there's a spring contact, and I can feel this being displaced when I
push in the jack*. I think the problem is with the center contact not
mating correctly.
*Hard to say whether this should be called a jack or a plug. The package

Re: Clueless customers

je...@cruzio.com (Jeff Liebermann) — Fri, 12 mar 2010 18:31:42 UT

On Thu, 11 Mar 2010 21:39:59 -0800, dpl...@radagast.org (Dave Platt)
wrote:
I've never tasted or smelled the real thing, so I have no way to
compare. The rotted version smelled like a restaurant dumpster. It
also lingered in my office for several days and required washing the
workbench and laptop bag with alcohol. I eventually gave the entire

Re: Clueless customers

je...@cruzio.com (Jeff Liebermann) — Fri, 12 mar 2010 18:13:40 UT

On Thu, 11 Mar 2010 13:33:33 -0800 (PST), "William R. Walsh"
I don't recall the machine involved but it was in the days of
monstrous tower cases and space eating desktops. I vaguely recall
paying about $700 for the 1x drive and $100 for CD. I didn't think of
tipping the case and I suspect it wouldn't have done any good. I

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Re: Coax cable used for DC instrumentation

hrhofm...@att.net (hr(bob) hofmann@att.net) — Fri, 12 mar 2010 17:39:38 UT

Are you looking for the 5 mV signal to be a DC or an AC signal, if AC
up to what frequency?

Coax cable used for DC instrumentation

andrewkgent...@gmail.com (Andy) — Fri, 12 mar 2010 17:18:46 UT

Hello,
I am working with an instrument which outputs 0-5mV, and that signal
has to reach a sensing device 35' away. I am concerned with noise,
and I don't think shielded cable will work well enough. So I am
considering using coax cable. But I don't understand coax. There are
numerous "RG" ratings and ohm ratings. Suppose I used RG62 with 50

Re: Need a sound recorder, what should I get?

m...@california.com (Robert Macy) — Fri, 12 mar 2010 16:40:07 UT

Appreciate your approach, but all that has been already exhausted.