[time-nuts] Modern motherboard with RS232 port

bownes bownes at gmail.com
Sun Aug 19 13:16:40 EDT 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 This sounds like a newer version of the board I use.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
>> PV/batteries.
>> Then use fiber ethernet to get off site.
>> 
>> The INTEL website would have further details.
>> 
>> Stan, W1LE    Cape Cod   FN41sr
>> 
>> 
>> 
>> 
>> ZZZZz
>> 
>> 
>> ______________________________**_________________
>> time-nuts mailing list -- time-nuts at febo.com
>> To unsubscribe, go to https://www.febo.com/cgi-bin/**
>> mailman/listinfo/time-nuts<https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts>
>> and follow the instructions there.
>> 
> 
> 
> 
> -- 
> 
> Chris Albertson
> Redondo Beach, California
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.




More information about the time-nuts mailing list