[time-nuts] webcam app to watch for and time stamp changes

lists at lazygranch.com lists at lazygranch.com
Sat Mar 2 15:30:04 EST 2013

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.
-----Original Message-----
From: Jim Lux <jimlux at earthlink.net>
Sender: time-nuts-bounces at febo.com
Date: Sat, 02 Mar 2013 11:33:02 
To: Discussion of precise time and frequency measurement<time-nuts at febo.com>
Reply-To: Discussion of precise time and frequency measurement
	<time-nuts at febo.com>
Subject: [time-nuts] webcam app to watch for and time stamp changes

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 would log the time when the display changes
Or one might even be able to look at the blinking 1 pps indicator using 
a light and photocell or something..
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