[time-nuts] Arduino GPSDO with 1ns res TIC

Chris Albertson albertson.chris at gmail.com
Thu Feb 13 01:30:50 EST 2014

On Wed, Feb 12, 2014 at 2:10 PM, Lars Walenius <lars.walenius at hotmail.com>wrote:

> I have just changed all my Swedish comments in my source code and attached
> it. I also copied the text to a Word-file so everybody can see it without
> the Arduino Environment.

Thanks for posting this.  I've been thinking for a long time that with
today's parts one should be able to build a good GPSDO without need to make
a PCB for spend $50

I'm reading the C source code now and of course have questions.  Later I
think I can build this on a solder less breadboard.  But now I've just

1) what connects to analog pins A1, A2, A3, A4, and A5.  The schematic
shows only A0 used for the TIC capacitor.

Later I might make some easy changes but I need to build the hardware first
so I can test.
One chance is that my Rb oscillator is controled via serial port, not a
voltage.  So I'll want the program to use serial commands rather than a
DAC.    You say your unit is pressure sensitive, well there are cheap and
very easy pressure sensors that are easy to use

It might be fun to see what I can do with a cheap $1 10Mhz crystal rather
then using an OCXO.


Chris Albertson
Redondo Beach, California

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