[time-nuts] Frequency counter recommendation

Poul-Henning Kamp phk at phk.freebsd.dk
Sun Dec 19 08:57:59 UTC 2010


In message <28E8C13C-3227-4CD6-BBEA-902F03C81243 at gmail.com>, bownes writes:

One of the big problems with "PC-instruments" is isolation: most of them
havn't any.

If you are going to design one such, remember to isolate the USB
port galvanically from the actual instrument...

-- 
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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