[time-nuts] Modern motherboard with RS232 port
bownes at gmail.com
Sun Aug 19 17:16:40 UTC 2012
Why not just use a raspberry pi? Uses a whole 2w at idle. Ntp might bump that to 2.01.
On Aug 19, 2012, at 13:06, Chris Albertson <albertson.chris at gmail.com> wrote:
> This sounds like a newer version of the board I use. The thing to check
> is if the CPU heat sink has a fan or not. Having no fan indicates that the
> CPU is not using much power. It also removes a common failure point.
> To reduce power even more. On an NTP server you can unplug the keyboard,
> mouse and monitor and if you have other servers on the LAN configure one as
> a "boot server" and have it run TFTP then your NTP server does not need a
> disk drive. It can run off a "RAM disk". This makes it very fast, even
> faster than a SSD and it saves some cash. Makes backup easy too as there
> is nothing to backup if there is no local storage. If you don't have a
> TFTP server use a small notebook size disk drive. Even a 80GB drive is
> overkill. You can also boot from a USB thumb drive and run a RAM disk.
> It is worth it to look at your electric bill to find how much you pay for
> power. Here I'm at $0.21 per KWH. A full size PC server can use 250W or
> more. There are 8760 hours in a year so you get $460 per year to run that
> 250W PC. The little Atom will pay for itself in just a few months. The
> first time I did that calculation, my "power hogs" where given away.
> On Sun, Aug 19, 2012 at 7:42 AM, Stan, W1LE <stanw1le at verizon.net> wrote:
>> Hello The Net,
>> For your consideration:
>> The INTEL model DN2800mt ITX mother board uses a ATOM CPU and
>> draws about 11 watts of AC power when configured as:
>> (I have not measured DC power yet.)
>> 30 GB OCZ Nocti mSATA solid state drive,
>> WIN7 pro, 64 bit, USB keyboard and mouse
>> APEX MI-0008 case.
>> Also has:
>> parallel port available on mother board, you extend to a connector
>> RS232 serial port available on mother board, you extend to a connector
>> a single DC power supply from 11 to 19 V DC.
>> 1 each PCIe expansion port, I will use with a premium 4 channel sound card
>> SATA ports available for HDD/SDD,
>> USB ports are available,
>> Motherboard sound, and Gigalan.
>> I have not played with NTP, (yet), but it sounds like a decent time nut
>> technical challenge.
>> My application is for a remote site with only 13V DC power available from
>> Then use fiber ethernet to get off site.
>> The INTEL website would have further details.
>> Stan, W1LE Cape Cod FN41sr
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> Chris Albertson
> Redondo Beach, California
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