[Soekris] 2 [serial port/LCD] questions about the net4501
phk at phk.freebsd.dk
Sat Aug 14 08:22:00 UTC 2004
In message <Pine.BSI.3.91.1040813123127.24309F-100000 at spsystems.net>, Henry Spe
>On Fri, 13 Aug 2004, Chuck Yerkes wrote:
>> The bottom line is that things that wish to self-power from the
>> serial line presume that they'll be lucky and have the higher
>> voltages that desktop or server ports often have...
>Small correction: *some* things that try to power from the serial line
>do that. There are serial-powered gadgets which will work with even a
>worst-case RS232 line.
And there are RS232 lines which do not provide enough power for even
these very smart devices...
The serial ports on the soekris computers are pretty low powered and
low voltage too (+/- 5V)
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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