[time-nuts] Sources for Mission Time Clock

paul swed paulswedb at gmail.com
Sun Jan 11 14:37:03 EST 2015

Low cost is on a PC with a large font.
It in no way will resemble the 1962 clock in your picture. This used
Plexiglas digits with actual lamps like a 327 as an example. I had a
display like that many years ago.

That said I don't know what you would have to drive the down count and then
upcount. Unless you just start the clock at some negative number and when
it hits zero it counts up.

Good luck on your project

On Sun, Jan 11, 2015 at 10:30 AM, Martin A Flynn <maflynn at theflynn.org>

> I am looking for a GMT/GET mission time clock  that has the following
> characteristics:
>  * Reads T minus prior to launch or deployment,  T plus after.
>  * Second display for GMT.
>  * Simulating it on a PC display would be OK, would prefer an LED/LCD
>    version for wall mounting
> There is a example of what I am looking for in the background of this
> photo: https://www.hq.nasa.gov/alsj/a16/A16_116_13_15.jpg   .   We have
> NTP, IRIG-B, and a 1 PPS source to work with.
> Any suggestions on a cost-effective way to accomplish this?
> Cheers
> Martin Flynn
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