[time-nuts] Sources for Mission Time Clock

Martin A Flynn maflynn at theflynn.org
Sun Jan 11 12:22:19 EST 2015

Not adverse to using a flat panel and PC hardware.

Been looking for surplus.  Pretty slim pickings available.

Hold is required,  Clock will not provide control to external devices

Martin Flynn

On 1/11/2015 12:12 PM, Bill Hawkins wrote:
> Martin,
> It seems like the only cost-effective way to get that display is to
> find a surplus source. If that's not possible, how about mounting a
> flat panel computer monitor on the wall and driving it with some
> custom software in a commercial computer with a standard operating
> system. There are standard ways to handle NTP, IRIG-B, and 1 PPS.
> Do you need to hold the countdown the way NASA does? Does the clock
> provide the electrical signal to launch or deploy?
> Bill Hawkins
> -----Original Message-----
> From: Martin A Flynn
> Sent: Sunday, January 11, 2015 9:31 AM
> 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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