Jim wrote:
As you can imagine, it turns out that foam can be too stiff or too
soft, and that the appropriate foam density and thickness is
dependent on both the mass of the thing being supported and the
expected loading.
You also need to pay attantion to what parts of the item can bear how
I have a $49 Casio Wave Ceptor, white face black numerals, analog hands
including second hand, date, alarm and WWVB syncing in the middle of the
night. Only had to replace the battery once and it ticks are closer than I
can discern when comparing to WWV @ 10or 15 Mhz.
Has anybody listened
On 11/09/2012 21:48, Tom Miller wrote:
That used to be the case but ebay now charges on the final price
including shipping.
AFAIK Ebay (at least in the UK) doesn't include postage in its final
value fee, where postage is specified separately that is. It takes its
bite of that particular
Interesting: trying to hear a low frequency crystal using a microphone...
it should be hard: the crystal has to make the case vibrate and this is
energy consuming (unless it resonates). I don't expect to pick up nothing,
except the step motor driving the hands.
On Wed, Sep 12, 2012 at 9:45 AM,
On Sun, Sep 9, 2012 at 10:34 PM, Robert Darlington
rdarling...@gmail.com wrote:
The waveceptor's are okay but I can't wear mine much because I tend to
cross timezones a lot. The hands only run in one direction so when
going to the west, it has to spin 11 hours forward. This takes 20
minutes.
Hi
Yes indeed you can hear the 32KHz crystal. Back in the dark ages, that's
exactly how we picked off the signal to drive a counter during adjustment of
the watch modules.
Bob
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Azelio
If I recall correctly it was in RF Design magazine many years ago that a
short article included a schematic for using an ultrasonic sensor and selective
amplifier (narrowband PLL?) to pick up the 32KHz vibration and convert it to a
measurable signal. I'd expect a normal microphone to pick up
OK, I'll try but I think this is not a dark ages practice: hearing a very
small vibration is related to low noise and small signal techniques. It is
way easier to hear a mechanical escapement.
On Wed, Sep 12, 2012 at 2:30 PM, Bob Camp li...@rtty.us wrote:
Hi
Yes indeed you can hear the 32KHz
On 9/11/2012 9:43 PM, time-nuts-requ...@febo.com wrote:
Given a choice, I always go USPS to my PO Box. It is fast and cheap. The
PO Box takes a day or two off the delivery and one less carrier to ruin
the shipment.
I used to do this a lot. Then the USPS delivered one of my packages to
the
In message 505085c2.80...@irtelemetrics.com, Dan Kemppainen writes:
Btw, can I propose a bit of self-help here ?
I have started to put things like good packing for intl. shipment
in my feedback to sellers, if this is warranted.
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
On 12 September 2012 03:03, Mark Spencer mspencer12...@yahoo.ca wrote:
Nope.. In my experience importing typical time nuts items into Canada Fedex
in Canada charges a signficant brokerage fee that is typically many times
higher than fees charged by other carriers
Since I have the paperwork
Unfortunately I don't have that article, anymore, but I remember the basics
from it. The author used one of the Radio Shack piezo sounder elements as the
pickup. It was one of the 3 wire styles designed for an external oscillator
circuit. I think it might have been around 1 cm diameter.
The
I avoid styrofoam insulation because:
It is too rigid and therefore transmits shocks to the object.
Once crushed, it provides no further protecrion.
-John
=
Jim wrote:
As you can imagine, it turns out that foam can be too stiff or too
soft, and that the appropriate foam
That is such a large barrier to entry for someone like me that I would
never be able to move to the UK!
Sep 12, 2012 09:20:16 AM, time-nuts@febo.com wrote:
On 12 September 2012 03:03, Mark Spencer wrote:
Nope.. In my experience importing typical time nuts items into
you can probably cite from the time-nuts archive
jim s j...@jwsss.com wrote:
On 9/11/2012 10:01 AM, Richard (Rick) Karlquist wrote:
The SC cut crystal is generally credited to Jack Kusters
(of HP) and Errol Ernisse. The story was something like
Errol proposed the concept and Jack actually
Hi Peter:
Many of the Microchip PIC uC have a lot of flexibility in this regard. I used
it on some of the clocks I made.
http://www.prc68.com/I/PRC68COM.shtml#07092006
Have Fun,
Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html
Peter Krengel wrote:
Hello
Hi:
I have a web page devoted to packaging, mainly examples of bad packaging I've received, and some vendors who do an
excellent job.
http://www.prc68.com/I/Pack.shtml
Have Fun,
Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html
That was part of the reason I suggested parting the busted unit out. It's
already behind the VAT wall.
-John
===
That is such a large barrier to entry for someone like me that I would
never be able to move to the UK!
Sep 12, 2012 09:20:16 AM, time-nuts@febo.com wrote:
On Tue, Sep 11, 2012 at 6:45 PM, Geoffrey Smith geoffsmit...@tpg.com.auwrote:
May I suggest that we pool our ideas on minimum packing requirements to be
posted as an article on say ebay.Simple thing like no loose beans,
bubble wrap size for instrument weight, box wall thickness,
On Tue, Sep 11, 2012 at 6:31 PM, Kevin Rosenberg ke...@rosenberg.netwrote:
On Sep 11, 2012, at 4:42 PM, Peter Krengel krengelda...@gmx.de wrote:
I'm looking for a possibility to make an automatic switching
between the internal µC oscillator (Atmel µC) to the 10MHz output
of my thunderbolt
Hi
Our production test setup was not very fancy. We had a simple miniature
microphone that directly contacted the module. The fixture also supplied
power to the module. There was an op amp and a simple diode limiter between
the mic and the input to the counter. No PLL's or crazy stuff needed. We
Hi
Some chips (dspic33's for example) have oscillator fail protection. You
blow the magic fuse bits and when the TBolt isn't giving you a clock the
micro drops back to the internal R/C oscillator. It's magic
Bob
-Original Message-
From: time-nuts-boun...@febo.com
On Wed, 12 Sep 2012 00:42:48 +0200, Peter Krengel
krengelda...@gmx.de wrote:
I'm looking for a possibility to make an automatic switching
between the internal µC oscillator (Atmel µC) to the 10MHz output
of my thunderbolt to use it as a precise µC clock. Has anybody an idea how
to do best
On 9/12/2012 2:21 AM, Azelio Boriani wrote:
Interesting: trying to hear a low frequency crystal using a microphone...
it should be hard: the crystal has to make the case vibrate and this is
energy consuming (unless it resonates). I don't expect to pick up nothing,
except the step motor driving
In the case of higher dollar items where the duties are higher the brokerage
and other related fees tend to fade into the noise. For smaller purchases the
brokerage fees become a bigger issue for me. As other posters have pointed out
using the postal service can often reduce or eliminate
The small microphone is not a problem: I've used a small mic from a
cellphone to make an audio downconverter used as a bat detector, I can try
with that hardware first.
On Wed, Sep 12, 2012 at 6:55 PM, Randy D. Hunt randy_hunt...@yahoo.comwrote:
On 9/12/2012 2:21 AM, Azelio Boriani wrote:
There are many Wave Ceptor LCD versions such as WVM120J-1 (about $27) or
WV59A-1AV (about $49) that might not have the spin issue.
Chris
On Sun, Sep 9, 2012 at 4:34 PM, Robert Darlington rdarling...@gmail.comwrote:
The waveceptor's are okay but I can't wear mine much because I tend to
On 09/12/2012 01:55 AM, Azelio Boriani wrote:
Useful: I have found other papers on the Kalman filter applied to clock
estimation. Thank you, Magnus.
You are welcome, I actually just followed through on Rick's hint as I
know there is useful info there, and I wanted to show it more clearly.
I
Write a model of the OCXO, use the Kalman filter to generate the steering
data so that they are cleaner and drive the DAC more frequently.
On Thu, Sep 13, 2012 at 12:05 AM, Magnus Danielson
mag...@rubidium.dyndns.org wrote:
On 09/12/2012 01:55 AM, Azelio Boriani wrote:
Useful: I have found
Thank you for the suggestions. I'm just learning about
the TI MSP430/C2000 possibilities (got eval boards)
to do a glitch free switching.
As I'm not fixed to the Atmels I will try to do the job
using one of these uCs rather than building stuff around
that Atmels ;)
73
Peter, DG4EK
30 matches
Mail list logo
