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Re: [gpsd-dev] PPS over USB
From: |
Eric S. Raymond |
Subject: |
Re: [gpsd-dev] PPS over USB |
Date: |
Sun, 6 May 2012 17:41:38 -0400 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
Gary E. Miller <address@hidden>:
> To meet that goal they want to source about 100 inexpensive USB/GPS for
> the local time source. Having them all identical should reduce any
> timing errors introduced by subtle differences in models. These are all
> software guys and previous efforts to get them to solder a few wires
> have been a failure. Thus the desire to source a commercial solution.
Right. Hand-building 100 devices was always a no-hoper.
It is also noting that while other people have been blue-skying about
Arduino boards and custom hardware I went to the market and *solved
the fscking problem*. There's a GR601W on my desk now delivering 1PPS
where I can see it. NaviSys will produce these in volume for us at
abot $30 a pop and the manufacturing, FCC cert etc. is *someone else's
hassle*. That's the optimal solution.
It is now May 6. We got a sustainable solution in *60 days* from a
cold standing start. Don't try to tell me we'd have gotten any
kind of custom design shipping sooner than that.
> Ugh. The Garmin 18s are unsuitable for indoor use. The uBlox6 in the
> GR-601W works well in my basement.
And in my office. Indoor usability is *strongly* desirable for this
application. Gary is right, the Garmin 18 would not be a good match.
--
<a href="http://www.catb.org/~esr/">Eric S. Raymond</a>
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- Re: [gpsd-dev] PPS over USB, (continued)
- Re: [gpsd-dev] PPS over USB, Ed W, 2012/05/07
- Re: [gpsd-dev] PPS over USB, tz, 2012/05/07
- Re: [gpsd-dev] PPS over USB, Ed W, 2012/05/07
- Re: [gpsd-dev] PPS over USB, Eric S. Raymond, 2012/05/06
- Re: [gpsd-dev] PPS over USB, dave taht, 2012/05/06
- Re: [gpsd-dev] PPS over USB, Gary E. Miller, 2012/05/06
- Re: [gpsd-dev] PPS over USB, Ed W, 2012/05/07
- Re: [gpsd-dev] PPS over USB, Gary E. Miller, 2012/05/07
- Re: [gpsd-dev] PPS over USB, Eric S. Raymond, 2012/05/07
- Re: [gpsd-dev] PPS over USB, Eric S. Raymond, 2012/05/06
- Re: [gpsd-dev] PPS over USB,
Eric S. Raymond <=
- Re: [gpsd-dev] PPS over USB, Terje Mathisen, 2012/05/06
- Re: [gpsd-dev] PPS over USB, Gary E. Miller, 2012/05/06
- Re: [gpsd-dev] PPS over USB, Dave Taht, 2012/05/06
- Re: [gpsd-dev] PPS over USB, Ed W, 2012/05/07
- Re: [gpsd-dev] PPS over USB, Terje Mathisen, 2012/05/07
- Re: [gpsd-dev] PPS over USB, Ed W, 2012/05/07
- Re: [gpsd-dev] PPS over USB, Gary E. Miller, 2012/05/07
- Re: [gpsd-dev] PPS over USB, Hal Murray, 2012/05/07
- Re: [gpsd-dev] PPS over USB, Eric S. Raymond, 2012/05/07
- Re: [gpsd-dev] PPS over USB, Dave Taht, 2012/05/07