[time-nuts] Which First GPSDO to buy?

Chris Albertson albertson.chris at gmail.com
Sun Dec 14 10:56:22 EST 2014

It's not worth making a PCB, not when you can buy the whole thing already
assembled for $3 with free shipping.  I use these just as if they where a
single chip and put them in a socket.  See eBay 141505833625 as an example.
  Those holes are in 0.1 inch centers so you can figure out the size. (I
get 1.3 inches long.)  direct link

I'll write up what I built.  It would be good to see the range of these.  I
tried to make mine as simple an low cost as possible without regard to
anything else.  Just to find the bottom line.  I doubt I would have met
that gaol by using a bare AVR chip.  That is NOT simple because it requires
so much more skill from the builder and with an entire working Arduino
selling for $3 how much could you save?  Actually the chips on that $3
board cost more than $3. (I don't even see how shipping from China can be
that cheap.)

On Sat, Dec 13, 2014 at 10:56 PM, Patrick Tudor <ptudor at ptudor.net> wrote:
> > On Dec 13, 2014, at 9:47 PM, Chris Albertson <albertson.chris at gmail.com>
> wrote:
> >
> > Actually I've added  some features to it like a 2 line by 16 character
> > display and some status LEDs.  And I can log data to a computer via a USB
> > cable so it is easy to plot data and it is using my more expansive mast
> > mounted timing antenna.
> Just in case any of you like reading Arduino code, for fun or functions to
> copy-and-paste,
> the code for my PCB that combines an ATMega328p with an Adafruit GPS and
> 16x2 LCD to display GPS info as it sends the PPS out the DB9 DCD is at
> GitHub.
> It’s not exactly, say, measuring oscillator cycles (yet... ) but it’s
> perhaps
> a good introduction for someone who’s never ever before used anything
> Arduino.
> (And now that I’ve done more PCBs with Cypress and FTDI chips, I wish I’d
> put
> that straight on my board instead of as a future daughterboard, but,
> feature creep.)
> https://github.com/ptudor/jemma-clock
> PT
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Chris Albertson
Redondo Beach, California

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