Subject: Re: serial port control
To: Ken Hornstein <email@example.com>
From: Wolfgang Rupprecht <firstname.lastname@example.org>
Date: 02/10/1998 12:03:51
Ken Hornstein <email@example.com> writes:
> Y'all should check out:
Thanks! I hadn't seen that one.
I guess I'll order one of these units for my netbsd box after all.
Perhaps this or a similar deamon could go into the netbsd ports?
> Back-UPS (_and_ the Smart-UPS/VS .... I made that mistake :-/).
Its not clear to me yet that sine wave output wins. Square wave
should be more efficient since you don't have the big dead-time
between, the two peaks. If the load is your typical PC switching
power supply then it would really prefer to have the full ~170v peak
voltage applied all the time. The down side of square waves is a
touch more RFI noise. As an aside, normal DC-DC converters are sqare
wave internally, as are switching supplies. It just doesn't pay to
round the corners of the wave unless one is running a motor or
transformer or something like it that will get very upset at the high
dv/dt of the square waves.
Wolfgang Rupprecht <firstname.lastname@example.org> http://www.wsrcc.com/wolfgang/
Never trust a program you don't have sources for.