[ntp:questions] NTP sever on an isolated Network
Richard B. Gilbert
rgilbert88 at comcast.net
Tue Jan 13 02:37:09 UTC 2009
Steve Kostecke wrote:
> On 2009-01-12, Unruh <unruh-spam at physics.ubc.ca> wrote:
>
>> In general serial ports do NOT supply power. The RS232 standard does not
>> state that any power should be supplied. Now, some may create serial ports
>> which do, but those are out of standard and will depend on whose serial
>> port you have. Ie, if you want to be sure, use the usb port for power. The
>> standard says they have to supply power (5V)
>
> You're assuming that all computers / SBCs / Embedded Systems have a USB
> port.
>
If you don't have a USB port, get a 5VDC "wall wart"! While most
computers have a 5VDC power supply from which you might borrow a modest
amount of power it's pretty kludgy to use that supply to power an
external device.
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