On 03/05/2013 03:10 PM, Jim Lux wrote:
On 3/4/13 6:52 PM, Bill Hawkins wrote:
Wouldn't it be easier to glue a fruit fly to the head of a pin and
attach electrodes to its visual ganglia to detect the change in
intensity of a segment of the display?
Excuse me, just back from surgery and the anest
On 3/4/13 6:52 PM, Bill Hawkins wrote:
Wouldn't it be easier to glue a fruit fly to the head of a pin and
attach electrodes to its visual ganglia to detect the change in
intensity of a segment of the display?
Excuse me, just back from surgery and the anesthetic may have
lingering effects. Discus
time.
Bill Hawkins
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Jim Lux
Sent: Sunday, March 03, 2013 1:10 PM
To: time-nuts@febo.com
Subject: Re: [time-nuts] webcam app to watch for and time stamp changes
On 3/3/13 10:47 AM, Chris Albe
In the watchmaker world, we have error, and personal error.
The watchmaker sets the watch to get the most accurate time
while sitting in his shop, and then he gives the watch to the
customer with the instructions to wear the watch normally for
2 weeks, but don't reset it, and bring it back for ad
On 3/3/13 10:47 AM, Chris Albertson wrote:
It's not an e-field antenna. The goal is the sense the current in the LCD.
My bet is no much of anything leaks out of that RSA device or a wrist
watch either. You have to figure that tiny battery lasts for over a
year and even if ALL the energy in th
On 3/3/13 10:09 AM, Poul-Henning Kamp wrote:
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In message <51336234.3090...@earthlink.net>, Jim Lux writes:
Most LCD and LED clocks have a shielding metal-coating on the front
glass, exactly to eliminate all EMI/EMC issues.
Yes, but perhaps
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In message <51336234.3090...@earthlink.net>, Jim Lux writes:
>> Most LCD and LED clocks have a shielding metal-coating on the front
>> glass, exactly to eliminate all EMI/EMC issues.
>
>Yes, but perhaps there's enough leakage to make this work.
Don't get hung up on the display EMI (for it is indeed very very tiny), look for
any steady emission. Yes, the amount is small, yes it can be shielded a bit,
but yes it is certainly possible to pick up. As I mentioned in my original
post, you may very well need to shield out external noise to
On 03/03/2013 06:18 PM, Chris Albertson wrote:
On Sun, Mar 3, 2013 at 12:10 AM, Tom Van Baak wrote:
Do you have suggestions on what sort of "antenna" to use to pick up the LCD AC
E-field? I'd expect the LCD drive current to be vanishing small.
Many turns of fine magnet wire going all the wa
On 3/3/13 8:52 AM, cfo wrote:
On Sat, 02 Mar 2013 11:33:02 -0800, Jim Lux wrote:
I am interested in the timing behavior of my RSA fob, which changes
every 60 seconds. Since I'm not about to open it up and probe inside, I
was wondering if someone had a clever way, say using a USB web cam, to
lo
On Sun, Mar 3, 2013 at 12:10 AM, Tom Van Baak wrote:
> Do you have suggestions on what sort of "antenna" to use to pick up the LCD
> AC E-field? I'd expect the LCD drive current to be vanishing small.
Many turns of fine magnet wire going all the way around the device.
Chris Albertson
Redondo
On 3/3/13 9:12 AM, EB4APL wrote:
When LCD wristwatches became common in the seventies we, in the
frequency and timing group of a space tracking facility, investigated
the possibility of adjusting our new watches against our standard.
We found that a a small copper plate, about 1 X 2 cm, resting a
When LCD wristwatches became common in the seventies we, in the
frequency and timing group of a space tracking facility, investigated
the possibility of adjusting our new watches against our standard.
We found that a a small copper plate, about 1 X 2 cm, resting against
the display and connected
On Sat, 02 Mar 2013 11:33:02 -0800, Jim Lux wrote:
> I am interested in the timing behavior of my RSA fob, which changes
> every 60 seconds. Since I'm not about to open it up and probe inside, I
> was wondering if someone had a clever way, say using a USB web cam, to
> log the changes over a 48 h
On 03/03/2013 03:46 PM, Jim Lux wrote:
On 3/3/13 1:00 AM, Poul-Henning Kamp wrote:
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In message <657D7F7CC03849419A2A90752E6A60A6@pc52>, "Tom Van Baak"
writes:
When playing with watches a while ago I tried to pick up any 32
kHz signal but fai
On 3/3/13 1:00 AM, Poul-Henning Kamp wrote:
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In message <657D7F7CC03849419A2A90752E6A60A6@pc52>, "Tom Van Baak" writes:
When playing with watches a while ago I tried to pick up any 32
kHz signal but failed. Those with 1 Hz stepper motors were
On 03/03/2013 10:00 AM, Poul-Henning Kamp wrote:
Content-Type: text/plain; charset=ISO-8859-1
In message<657D7F7CC03849419A2A90752E6A60A6@pc52>, "Tom Van Baak" writes:
When playing with watches a while ago I tried to pick up any 32
kHz signal but failed. Those with 1 Hz stepper motors
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In message <657D7F7CC03849419A2A90752E6A60A6@pc52>, "Tom Van Baak" writes:
>When playing with watches a while ago I tried to pick up any 32
>kHz signal but failed. Those with 1 Hz stepper motors were easy,
>but LED or LCD displays were too elec
> Well, considering that actively "driving" a LCD segment involves passing
> an AC field over it, in electrostatic drive, you could detect the
> existence of AC or not on a segment, but you would have to "mask out"
> that of other segments. On the other hand, you can expect a multiplexed
> driv
On 03/03/2013 01:39 AM, Jim Lux wrote:
On 3/2/13 4:12 PM, Magnus Danielson wrote:
On 03/03/2013 01:00 AM, Peter Gottlieb wrote:
Perhaps you can detect EMI from the device especially if you put it it a
shielded metal box with pickup antenna. You might be able to get the
clock right from that.
On 3/2/13 4:12 PM, Magnus Danielson wrote:
On 03/03/2013 01:00 AM, Peter Gottlieb wrote:
Perhaps you can detect EMI from the device especially if you put it it a
shielded metal box with pickup antenna. You might be able to get the
clock right from that.
Well, considering that actively "driving
On 03/03/2013 01:00 AM, Peter Gottlieb wrote:
Perhaps you can detect EMI from the device especially if you put it it a
shielded metal box with pickup antenna. You might be able to get the
clock right from that.
Well, considering that actively "driving" a LCD segment involves passing
an AC fiel
Most two factor authentication systems have re-sync capability, rsa had thieir
token master key compromised for all des based tokens I believe
Sent from my iPhone
On Mar 2, 2013, at 16:41, Jim Lux wrote:
> On 3/2/13 1:29 PM, li...@lazygranch.com wrote:
>> If you think about it, there would ha
Perhaps you can detect EMI from the device especially if you put it it a
shielded metal box with pickup antenna. You might be able to get the clock
right from that.
On 3/2/2013 6:50 PM, Jim Lux wrote:
On 3/2/13 2:52 PM, Tom Van Baak wrote:
Hi Jim,
I had a similar challenge a while ago. I
On 3/2/13 2:52 PM, Tom Van Baak wrote:
Hi Jim,
I had a similar challenge a while ago. I ended up capturing a
4-digit, 7-segment display with a USB/LAN webcam, converting the JPG
to BMP, analyzing pixel gradients, matching the image with heuristic
masks, and appending an ascii log file with the
On 3/2/13 1:29 PM, li...@lazygranch.com wrote:
If you think about it, there would have to be some time correction if only
because these fobs can't be all that accurate in maintaining time. That is,
they would be no better than a watch.
I'm not so keen on wearing out the internal battery since
m: "Jim Lux"
To:
Sent: Saturday, March 02, 2013 12:57 PM
Subject: Re: [time-nuts] webcam app to watch for and time stamp changes
> On 3/2/13 12:30 PM, li...@lazygranch.com wrote:
>> My fob only outputs a code on demand, that is after I push the button.
>>
>>
of $5 when paypal introduced them.
-Original Message-
From: Jim Lux
Sender: time-nuts-boun...@febo.com
Date: Sat, 02 Mar 2013 13:18:36
To:
Reply-To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] webcam app to watch for and time stamp changes
On 3/2/
On 3/2/13 1:10 PM, Peter Gottlieb wrote:
I had one for work a while back and asked the IT security guys about it
and was told that the change was on a fixed schedule but of course each
fob was a little different due to temperature, over time, etc and that
the system automatically "learned" the fo
I had one for work a while back and asked the IT security guys about it and was
told that the change was on a fixed schedule but of course each fob was a little
different due to temperature, over time, etc and that the system automatically
"learned" the fobs and opened or tightened its tolerance
On 3/2/13 12:30 PM, li...@lazygranch.com wrote:
My fob only outputs a code on demand, that is after I push the button.
Any of the motion detection programs that use webcams would detect the change
in display, but with a multiplexed display, I'm not sure how well.
Interesting point.. mine onl
o.com
Date: Sat, 02 Mar 2013 11:33:02
To: Discussion of precise time and frequency measurement
Reply-To: Discussion of precise time and frequency measurement
Subject: [time-nuts] webcam app to watch for and time stamp changes
I am interested in the timing behavior of my RSA fob, which ch
I am interested in the timing behavior of my RSA fob, which changes
every 60 seconds. Since I'm not about to open it up and probe inside, I
was wondering if someone had a clever way, say using a USB web cam, to
log the changes over a 48 hour period. You'd point the web cam at the
fob, and it
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