Date: Sun, 19 Dec 1999 13:27:48 -0800 (PST) From: Matthew Dillon <dillon@apollo.backplane.com> To: Wes Peters <wes@softweyr.com> Cc: "Louis A. Mamakos" <louie@TransSys.COM>, Tim Tsai <tim@futuresouth.com>, Sergey Babkin <babkin@bellatlantic.net>, freebsd-hackers@FreeBSD.ORG Subject: Re: Cool little 100BaseTX switch - they're coming down in price Message-ID: <199912192127.NAA09156@apollo.backplane.com> References: <199912190410.UAA01049@apollo.backplane.com> <385C60FC.7613CB55@bellatlantic.net> <19991218225758.A23729@futuresouth.com> <199912190556.AAA08484@whizzo.transsys.com> <199912191943.LAA06826@apollo.backplane.com> <385D47D3.FCEE9EAB@softweyr.com>
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:> I really hate these switching regulated DC wall plugs. They always use
:> cheap caps in them to save money and then don't bother adding any
:> protection to the motherboard. I prefer AC wall plugs or unregulated DC
:> wall plugs and then a small switching regulator on the motherboard. That
:> way you can throw anything up to 40V into it and it will still work.
:
:And nearly double the cost of the item, and make it much more difficult
:(read as "expensive") to pass FCC/EC requirements. You may prefer such
:things, but you're not willing to pay for them. (Generic "you" meaning
:"everyone" here).
:
:Wes Peters Softweyr LLC
This is not true at all. First, the U.L. is handled by the wall adapter.
Second, getting FCC certification for a small device whos U.L. is
arleady handled by a wall adapter is *trivial*. Moving the switching
supply inside verses depending on a DC adapter does not make FCC cert.
more difficult.
There is an expense in the power supply verses the cheap crap you get
in a DC regulated wall adapter - well, doh! That's why it's better!
-Matt
Matthew Dillon
<dillon@backplane.com>
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