[time-nuts] webcam app to watch for and time stamp changes
magnus at rubidium.dyndns.org
Sun Mar 3 07:11:57 EST 2013
On 03/03/2013 10:00 AM, Poul-Henning Kamp wrote:
> Content-Type: text/plain; charset=ISO-8859-1
> In message<657D7F7CC03849419A2A90752E6A60A6 at 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 electro/magnetic/acoustic quiet
>> for me to ever detect anything.
> Most LCD and LED clocks have a shielding metal-coating on the front
> glass, exactly to eliminate all EMI/EMC issues.
Darn. I should have guessed.
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