[time-nuts] CW12-TIM

David J Taylor david-taylor at blueyonder.co.uk
Sat Jul 12 03:46:01 EDT 2014

Hello Time Nuts (and Time Lords!),

This is my first real post here, and I understand fully, I am but a
grasshopper when it comes to some of the messages I have seen on the list.

I am needing a GPS source of precise time, in three flavours - 10MHz (or
so), 1PPS, and ethernet NTP. In the beginning, the NTP will be most
important, and as time goes on, I'll need the 1PPS signal.

For my clock, I was wanting to use a Timesync CW12-TIM module, set it to
10MHz, and attach its serial output to an Arduino (or similar) with
ethernet capabilities to provide the NTP packets to the network.

If a static CW12-TIM ethernet clock could be made, I would be willing to
try my hand at mounting them to mobile robots, again, for synchronised
timing of events.

Does anyone have any thoughts on this project?

Many thanks!

Welcome, Shane.

Two possibilities for you:

- ublox modules can give PPS and a frequency (8 MHz IIRC).  Here's one 
example - ready-made for a Raspberry Pi, although I recall you may need a 
different module than the 7Q shown here.  The module accepts an external 


Using the RPi you could then make an Ethernet NTP server.


- for PPS alone, with a built-in antenna:


It might help to know any other requirements like internal/external antenna, 
level of accuracy required, etc. etc.

SatSignal Software - Quality software written to your requirements
Web: http://www.satsignal.eu
Email: david-taylor at blueyonder.co.uk 

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