On Thu, Jan 13, 2022 at 11:00 AM Chris Adams <cma@cmadams.net> wrote:
Once upon a time, Dave Taht <dave.taht@gmail.com> said:
I tend also to hang a good gps off a second usb port, if available. There's a topic for geeks - does anyone else really know (or care) what time it really is?
25 (or 6) to 4?
Running GPS over USB for timing makes me twitch though - too much jitter! :) Use a proper serial or GPIO port, with that you can get down to sub-microsecond accuracy.
No, no, I actually went through the time/hassle and expense to create a usb gps with a PPS output, and then wanted to put a supercap on it because batteries didn't last long enough. https://lists.bufferbloat.net/pipermail/thumbgps-devel/2012-May/000497.html They were sold wholesale for a while. I don't know if any modern usb gps has a pps output... I still have enough of these left to last a lifetime.
-- Chris Adams <cma@cmadams.net>
-- I tried to build a better future, a few times: https://wayforward.archive.org/?site=https%3A%2F%2Fwww.icei.org Dave Täht CEO, TekLibre, LLC