nanog mailing list archives
Re: home router battery backup
From: Dave Taht <dave.taht () gmail com>
Date: Thu, 13 Jan 2022 12:00:33 -0800
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
Current thread:
- Re: home router battery backup, (continued)
- Re: home router battery backup Jay Hennigan (Jan 12)
- Re: home router battery backup Brandon Martin (Jan 12)
- Re: home router battery backup Chris Adams (Jan 13)
- Re: home router battery backup Jared Mauch (Jan 13)
- Re: home router battery backup Stephen Stuart (Jan 13)
- RE: home router battery backup Ryland Kremeier (Jan 13)
- Re: home router battery backup Dave Taht (Jan 13)
- RE: home router battery backup Ryland Kremeier (Jan 13)
- Re: home router battery backup Stephen Stuart (Jan 13)
- Re: home router battery backup Chris Adams (Jan 13)
- Re: home router battery backup Dave Taht (Jan 13)
- Re: home router battery backup Brandon Martin (Jan 12)
- Re: home router battery backup Jay Hennigan (Jan 12)
- Re: home router battery backup Dave Taht (Jan 13)
- Re: home router battery backup Chris Adams (Jan 13)
- Re: home router battery backup Tony Wicks (Jan 13)
- Re: home router battery backup Michael Thomas (Jan 12)
- Re: home router battery backup Shawn L via NANOG (Jan 12)
- ONTs Dave Taht (Jan 12)