[time-nuts] FE5680 GPS Disciplined Controller
EWKehren at aol.com
EWKehren at aol.com
Thu Jun 19 19:53:26 UTC 2014
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.
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