On Tue, 07 Apr 2015 13:58:00 -0700, Hal Murray wrote:
You can get no-fan style power for Mini-ITX size systems. The ones I'm
familiar with have a tiny DC-DC converter that mounts on the big power
connector and runs off a laptop size external supply.
http://www.mini-box.com/DC-DC
I use
From: Didier Juges
Is the new RPi2 any different in that regard?
The RPi 2 has the same basic configuration (Ethernet over USB), but has a
4-core CPU and 1 GB memory, making it very usable as a stand-alone PC. NTP
compiles within a reasonable time - about the same as
att...@kinali.ch said:
The biggest problem would be to get the data into ntp in the right way, as I
am not sure whether ntp supports that kind of input.
If anybody ever needs help with ntp, feel free to poke me off list.
There are 2 ways to get data into ntp.
You can implement the kernel
Problematic if you are after microsecond-level accuracy, perhaps, but so
would the BeagleBone be. If your needs are more in the 100 microsecond
range, either would be fine with a reasonably wide PPS pulse.
Not really. If you know how to write C, you can use the
timer on the BBB and get to
kb...@n1k.org said:
Now you need to sort out the B, the A+ and the B+ in the Raspberry world.
There may be more that I have not yet noticed. As far as I can tell, they
all are pretty limited once you get past the tight video integration on the
B and B+.
There is also the 2B with 1 GB and a
On Mon, 06 Apr 2015 22:29:23 +, Frank Hughes via time-nuts wrote:
Hi,Years ago this forum helped me put together my first GPSDO and NTP
server. Using a then-popular INTEL ATOM board, FreeBSD w/ the NTP
kernel, 1PPS input from aTB, works great. But as the years go by, HW
improves/evolves
On Tue, 7 Apr 2015 17:09:28 + (UTC)
cfo xne...@luna.dyndns.dk wrote:
What about the Odroid C1 ?
http://tinyurl.com/qd7m4cz
I recommend against using an Odroid. What I have heard from friends
is that you do not get any support from the manufacturer in any
way. Which means you have to build
On 4/8/15 17:13, Attila Kinali wrote:
The Cubie borads and the stuff done by Olimex would be also quite
good. Especially Olimex is known for their very good user support, as
they specifically sell to tinkerers and engineering companies. This
also includes that their boards have almost all I/O
WOW, thanks for all the info!!!I will use those cool DC-DC power converters on
lots of project motherboards, now that I know they exist.Very interested in the
embedded systems options, many more to select from than I had suspected,
thanks.
I do not crave super precision for this NTP
The ball bearing fan upgrade is the best idea. Bater idea is to put
in a temperature controlled fan so it will spin slow or stop most of
the time.
I don't see the need to run each server on it's own hardware. Put the
cashing DNS server on the same box as the NTP server. Or if you do
have two
I think beagle bone black is the answer to this question (because rPi
has a USB-network interface that´s problematic) but i´ll let others
that know more than me about this specific subject follow on
Daniel
On 06/04/2015 19:29, Frank Hughes via time-nuts wrote:
Hi,Years ago this forum
On Mon, Apr 6, 2015 at 5:29 PM, Frank Hughes via time-nuts
time-nuts@febo.com wrote:
Looking for a platform not needing a fan. While the ATOM and SSD seem to
be OK w/o direct airflow, the Mini ITX Power Supply fan is needed.
After three years, the stupid sleeve bearings are beginning to
On Mon, 6 Apr 2015 22:29:23 + (UTC)
Frank Hughes via time-nuts time-nuts@febo.com wrote:
Looking for a platform not needing a fan. While the ATOM and SSD seem to be
OK w/o direct airflow, the Mini ITX Power Supply fan is needed.
That depends highly on how much knowledge in linux and
albertson.ch...@gmail.com said:
In terms of performance, ARM based credit card sized computers do well if
you can get the PPS to the general purpose I/O pin that interrupts on an
edge. the Pi can't do that the BeagleBone Black can and it sell for $45.
What/why can't the Pi do? I have one
Internally the rPI is a ver awkward beast: the CPU is connected to a
GPU, and the GPU is connected to the GPIOs... so lots of jitter and latency.
It was designed to be a video decoder... the CPU is there for testing
and housekeeping. It works, surelly, but it´s not designed to have low
On Mon, Apr 6, 2015 at 6:29 PM, Frank Hughes via time-nuts
time-nuts@febo.com wrote:
Or just put a ball-bearing fan in
Sites like lilliputing follow the low power/embedded market. I'd suggest
starting there.
All of my low power systems use power bricks. This includes mini-itx
boards.
I've
I think beagle bone black is the answer to this question (because rPi
has a USB-network interface that´s problematic) but i´ll let others
that know more than me about this specific subject follow on
Daniel
==
Problematic if you are after
On Tue, 7 Apr 2015 17:39:01 +0100
David J Taylor david-tay...@blueyonder.co.uk wrote:
Problematic if you are after microsecond-level accuracy, perhaps, but so
would the BeagleBone be. If your needs are more in the 100 microsecond
range, either would be fine with a reasonably wide PPS pulse.
Looking for a platform not needing a fan. While the ATOM and SSD seem to be
OK w/o direct airflow, the Mini ITX Power Supply fan is needed.
If you are happy with Raspberry Pi or BeagleBone Black, they are the low cost
low power way to go. They run Linux. They don't have a real disk. If
Hi!
Take a look at
https://www.febo.com/pipermail/time-nuts/2014-December/089217.html and
https://www.febo.com/pipermail/time-nuts/2014-December/089681.html. There
you can see sub-microsecond accuracy.
Edésio
On Tue, Apr 07, 2015 at 09:52:57PM +0200, Attila Kinali wrote:
On Tue, 7 Apr 2015
Is the new RPi2 any different in that regard?
On April 7, 2015 8:17:12 AM CDT, Daniel Mendes dmend...@gmail.com wrote:
Internally the rPI is a ver awkward beast: the CPU is connected to a
GPU, and the GPU is connected to the GPIOs... so lots of jitter and
latency.
It was designed to be a video
Hi
Now you need to sort out the B, the A+ and the B+ in the Raspberry world. There
may be more that I have not yet noticed. As far as I can tell, they all are
pretty limited
once you get past the tight video integration on the B and B+.
Bob
On Apr 7, 2015, at 12:41 PM, Didier Juges
On 07/04/2015 17:58, Hal Murray wrote:
If you are happy with Raspberry Pi or BeagleBone Black, they are the
low cost low power way to go. They run Linux. They don't have a real
disk. If you do a lot of disk activity, you might wear out the SD
card frequently enough to be annoying. That
Hi,Years ago this forum helped me put together my first GPSDO and NTP server.
Using a then-popular INTEL ATOM board, FreeBSD w/ the NTP kernel, 1PPS input
from aTB, works great. But as the years go by, HW improves/evolves and it might
be time to recreate this functionin some other modern HW.
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