[time-nuts] FE5680 GPS Disciplined Controller

[EWKehren at aol.com]

Tom 
I am not concerned having followed the discussions lets see what comes from 
 it. Based on the response, we will have our hands full.
Let me make clear I take credit for instigating it but it  involved five 
people that at this time have chosen not to be  mentioned.
Bert.

 
 
In a message dated 6/19/2014 2:48:13 P.M. Eastern Daylight Time,  
tvb at LeapSecond.com writes:

Chris,

I'm glad you're making progress on your Arduino  GPSDO. You've mentioned it 
in a dozen postings the past half year. Perhaps you  will post the source 
code sketch, full design, and actual phase / frequency /  adev results some 
day. Many of us are willing to help as independent testers  and see actual 
results.

Meanwhile... Now would be the time for you to  let Bert have the stage; he 
has an actual working design, with PCB, and  several tests in progress. 
High-performance results. This represents a year of  work on his part, and 
others who have freely collaborated and contributed to  all aspects of his 
project. It's really nice.

Please do not hijack the  thread of another time nut's superb effort. Some 
week it will be your turn to  post final results of your project. This is 
not the  week.

Thanks,
/tvb

----- Original Message ----- 
From:  "Chris Albertson" <albertson.chris at gmail.com>
To: "Discussion of  precise time and frequency measurement" 
<time-nuts at febo.com>
Sent:  Thursday, June 19, 2014 8:31 AM
Subject: Re: [time-nuts] FE5680 GPS  Disciplined Controller


> I've been working in the same thing BUT  I don't want anyone who builds it
> to need a PCB.  And I want the  firmware to load over USB so there is no
> need to ship programmed chips  or deal with external programmers.   I 
think
> I can get the  cost below $20.     That said I doubt I'll get 1E-13
>  performance out of my Rb.
> 
> My little Arduino based controller  has been running now for a couple 
months
> and keeping a crystal in  lock.  The board has a pins left over for a 
serial
> port that I'll  hook up to the Rb.
> 
> The trick to getting the cost down is NOT  to do a custom PCB.  Take
> advantage of one of the uP development  boards and then for under $5 you 
get
> the USB interface, D/A and A/D,  serial ports, timers and quite a bit of
> logic all  1/3rd the size  of a credit  card.


_______________________________________________
time-nuts  mailing list -- time-nuts at febo.com
To unsubscribe, go to  
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the  instructions there.