Steve Kostecke wrote: > On 2009-01-12, Unruh <unruh-s...@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. _______________________________________________ questions mailing list questions@lists.ntp.org https://lists.ntp.org/mailman/listinfo/questions
