[time-nuts] Re: Is this a standard form factor for timing GPS?

[Bob kb8tq]

Hi

The “problem” with these boards is that they have a (relatively) limited pinout. They duplicate
enough of the “newer” module’s pins to cover the function of the original Motorola module. 
Depending on which board you look at, various features may be difficult to access. 

Given how cheap a basic board is these days, you might do better with a board for your
control (and whatever else) plus an “intermediate” board. More or less, the intermediate is
empty save for a couple of multi pin connectors. Then you can adapt to any module out there.

Bob

> On Apr 19, 2021, at 2:15 PM, Daniel <dmendesf at gmail.com> wrote:
> 
> 
> Thanks for the info. My plan was to buy one of these cheap LEA-M8T and design a board around it, knowing that I can later upgrade to a ZED-F9T just swapping the boards (and probably upgrading the firmware of the microcontroller that talks to it). Seems feasible? I'll dig the HUAWEI LEA-M8T pinout and see if it's compatible with the ZED-F9T...
> 
> Daniel
> 
> Em 19/04/2021 14:50, Bob kb8tq escreveu:
>> Hi
>> 
>> If you go back into the dim mists of time (1990’s )…. The original Motorola
>> GPS modules, that pretty much started all this “module based” stuff, came
>> out in a form factor that is roughly that size and shape.
>> 
>> Folks still sell “software compatible” modules to drop in place of the original
>> Motorola parts. The parts you have dug up will have very limited use on a
>> board designed for a Motorola part unless the firmware is re-written.
>> 
>> Bob
>> 
>>> On Apr 19, 2021, at 12:36 PM, Daniel <dmendesf at gmail.com> wrote:
>>> 
>>> 
>>> Sometime ago I came across this PCB with the ZED-F9T GPS module:
>>> 
>>> https://www.digikey.com/en/products/detail/u-blox/RCB-F9T/12090682?s=N4IgTCBcDaIF4FMAmBaAZgTgC4gLoF8g
>>> 
>>> Then I saw this one in Ebay with the LEA-M8T:
>>> 
>>> https://www.ebay.com/itm/ON-SALE-U-BLOX-ublox-LEA-M8T-0-10-HUAWEI-GPS-Module-Board/333942814949?_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D20160908105057%26meid%3D272f9a3b11554379afc65ab7246da220%26pid%3D100675%26rk%3D3%26rkt%3D15%26mehot%3Dnone%26sd%3D114369566111%26itm%3D333942814949%26pmt%3D0%26noa%3D1%26pg%3D2380057&_trksid=p2380057.c100675.m4236&_trkparms=pageci%3Affe08852-a12c-11eb-8fcd-0afc3c2211d5%7Cparentrq%3Aeafafdcc1780a4d4e65b2591ffda16dc%7Ciid%3A1
>>> 
>>> Then this one with a Trimble:
>>> 
>>> https://www.ebay.com/itm/Trimble-TPN-66974-45-66266-45-GPS-Timing-Module-Resolution-SMT-Carrier-Board/333442543937?_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D20160908105057%26meid%3D272f9a3b11554379afc65ab7246da220%26pid%3D100675%26rk%3D2%26rkt%3D15%26mehot%3Dnone%26sd%3D114369566111%26itm%3D333442543937%26pmt%3D0%26noa%3D1%26pg%3D2380057%26brand%3DTrimble&_trksid=p2380057.c100675.m4236&_trkparms=pageci%3Affe08852-a12c-11eb-8fcd-0afc3c2211d5%7Cparentrq%3Aeafafdcc1780a4d4e65b2591ffda16dc%7Ciid%3A1
>>> 
>>> Noticing how similar they are I started to wonder if this is a standatd form factor i'm not aware of. Does anybody here know anything about it? (Do they have the same pinout?)
>>> 
>>> Daniel
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