[time-nuts] display on sale

Eric Williams wd6cmu at gmail.com
Wed May 29 14:01:33 EDT 2013

I ran a modified wall clock driven by a homebrew Oncore/AVR uController box
for a few years.  It worked pretty well even though it was open loop, I had
code for synchronizing the second hand with the GPS, and it would wind
itself forward to adjust for DST.  Eventually it broke down, so I bought an
OnTime analog PoE display/clock and have been very happy with it, the
Symmetricom looks like the same thing re-branded and at less than half the

On Wed, May 29, 2013 at 10:26 AM, Michael Tharp
<gxti at partiallystapled.com>wrote:

> On 5/29/2013 12:11, Robert Darlington wrote:
>> I ordered two PoE clocks, one with the 12 hour face, one with the 24 hour
>> face.    Earlier this week I considered using the Vetenari Clock project
>> circuit board to control a cheap analog clock movement and have it do my
>> bididng -however I can't write the code in $99 of my free time!
> Note that the clock in the Vetenari kit is just a cheap quartz clock like
> you could get anywhere, and the replacement board it comes with isn't of
> any use if you're trying to do something different. Basic quartz clocks are
> not a good choice for hacking into a precision display because they can
> only tick forward in one second increments, with no way to know what time
> is being displayed nor a reasonable way to adjust forward or backward an
> hour for daylight time changes. In other words, you can make it tick
> precisely but you can't really set it.
> I'm sort of interested in getting an analog WWVB type clock and seeing how
> much work it would be to coopt *that* hardware since it is designed to set
> arbitrary times, but I have a feeling I'd be better served making my own
> mechanics with a stepper motor and reduction gear. Of course a digital
> clock would be much less complicated, which is what Miguel was asking about
> to begin with, but that's not nearly as much fun.
> -- m. tharp
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