[time-nuts] Ublox 8T

[Matthias Welwarsky]

On Mittwoch, 9. Dezember 2020 14:57:55 CET Bob kb8tq wrote:
> Hi
> 
> I think the key point is:
> 
> *IF* somebody wants to do a layout using the M8T, Bert already *has* a
> “known good” PCB layout footprint in his inventory of useful stuff. Since
> the uBlox is a really odd part, you aren’t going to find that footprint
> built into the standard layout programs.

I have a known-good footprint and symbol for KiCAD, if anyone is interested. I 
also have KiCAD project for a small breakout board. It's not too featureful, 
no antenna power switching or monitoring, no support for antenna power other 
than from the built-in LDO. However, it has been successfully used in a GPSDO 
project. All components are hobbyist-friendly 0805, except for a LDO with 
SOT-23-5 footprint.

> 
> Bob
> 
> > On Dec 8, 2020, at 6:26 PM, Bill Notfaded <notfaded1 at gmail.com> wrote:
> > 
> > That's a really old board though.  An 8 series isn't pin compatible with
> > say LEA-6T is it?  The picture had a 5 series in it.
> > 
> > Could you use something like this?
> > https://github.com/PaulZC/NEO-M8T_GNSS_FeatherWing/blob/master/LEARN.md
> > 
> > Bill
> > 
> > On Tue, Dec 8, 2020, 10:30 AM Gregory Beat via time-nuts <
> > 
> > time-nuts at lists.febo.com> wrote:
> >> There are various Breakout (bare) Boards for the uBlox modules posted on
> >> Internet.
> >> SparkFun has carried them, in the past, and sometimes sold the bare
> >> boards
> >> without the uBlox module.
> >> https://www.sparkfun.com/products/15005
> >> 
> >> StuartsProjects (Stuart Robinson, Cardiff, UK) has a bare board for the
> >> Ublox MAX M8Q module.  Sold on Tindie, used in high-altitude balloon
> >> projects.
> >> 
> >> https://www.tindie.com/products/stuartsprojects/ublox-max-8mq-gps-breakou
> >> t-board-x-2/
> >> 
> >> Contact Limor “Ladyada” Fried at Adafruit, she might have bare boards OR
> >> Gerbers for earlier or future products.
> >> https://www.adafruit.com/?q=gps+breakout&p=1&sort=BestMatch
> >> 
> >> Dan Watson designed one, for the 6-series five years ago.
> >> He sometimes posted Gerber files.
> >> 
> >> http://syncchannel.blogspot.com/2015/09/a-nearly-perfect-u-blox-gps-break
> >> out.html
> >> 
> >> greg
> >> w9gb
> >> ==
> >> Date: Mon, 7 Dec 2020 09:47:55 -0500
> >> From: paul swed <paulswedb at gmail.com>
> >> To: Discussion of precise time and frequency
> >> 
> >>   measurement <time-nuts at lists.febo.com>
> >> 
> >> Subject: Re: [time-nuts] Ublox 8T
> >> 
> >> Bert Very attractive price. They appear to be on a cut out circuit board.
> >> How are you connecting to them please?
> >> Regards
> >> Paul.
> >> WB8TSL
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