[time-nuts] adafruit $40 GPS

Bob Camp lists at rtty.us
Tue May 14 12:53:34 EDT 2013


Hi

Unfortunately there are (and have been) a number of gizmos out there with
1pps outputs that are far from "timing grade" parts. Often the reason is
that the manufacturer doesn't have a TimeNut on staff (with a pile of gear)
to ring the bugs out of the part. Without some careful debug, there are
inevitably going to be issues. 

Bob

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of lists at lazygranch.com
Sent: Tuesday, May 14, 2013 12:45 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] adafruit $40 GPS

I thought the deal was it had a 1pps tick.

-----Original Message-----
From: Chris Albertson <albertson.chris at gmail.com>
Sender: time-nuts-bounces at febo.com
Date: Tue, 14 May 2013 09:02:17 
To: Discussion of precise time and frequency measurement<time-nuts at febo.com>
Reply-To: Discussion of precise time and frequency measurement
	<time-nuts at febo.com>
Subject: Re: [time-nuts] adafruit $40 GPS

The adafruit GPS has a built in antenna.  But you can add an external one.

But why use this for timing?  They don't even give a spec for timing
accuracy and it is likely NOT a timing GPS.  It is  a navigation unit.
 Pretty much useless for timing.

Also the price is to high.  You can do better in eBay, real timing
units sell for as little as $15.



On Tue, May 14, 2013 at 7:47 AM, james machado <hvgeekwtrvl at gmail.com>
wrote:
> On Mon, May 13, 2013 at 8:00 PM, Jim Lux <jimlux at earthlink.net> wrote:
>
>> Interesting product.. too bad they don't have a small antenna that could
>> be integrated with it. (or maybe they do, and my browsing around didn't
>> find it).
>>
>>
> Jim
>
> to use this gps (https://www.adafruit.com/products/746) you would then add
> a SMA to uFL adapter (http://www.adafruit.com/products/851) and then to
you
> can connect it too an antenna (http://www.adafruit.com/products/960)
>
>
>
>> I've got a bunch of applications coming up for something which needs
>> synchronization at 1us to 1ms level for distributed data collection. The
>> Garmin GPS18 is nice for now, but I'm always looking for things that
might
>> be at different levels of integration for other projects.
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>
> james
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-- 

Chris Albertson
Redondo Beach, California
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