From: Rik Strobbe <rik.strobbe@kuleuven.be>
To: "rsgb_lf_group@blacksheep.org" <rsgb_lf_group@blacksheep.org>
Thread-Topic: LF: Windows software to drive a relay at a given time?
Thread-Index: AQHT0X85VJ8PcRLHSUS1Ml9UHcenWqP7SSGAgAABHQCAAAQWgIAAKImd
Date: Wed, 11 Apr 2018 12:06:49 +0000
Message-ID: <1523448409377.3567@kuleuven.be>
References: <1215299641.20180411111636@gmail.com>
 <CAA8k23TWb-UcDg=FqiqEPaO1gc1o5brVRBB-SLpxaPrJiY+_fA@mail.gmail.com>
 <CAA8k23R41Zp+pEH+jxRQa8RgzuzAPPBm1gc6-feYdQL_Z8ksog@mail.gmail.com>,<637789342.20180411123709@gmail.com>
In-Reply-To: <637789342.20180411123709@gmail.com>
Accept-Language: nl-BE, en-GB, en-US
Content-Language: nl-BE
MIME-Version: 1.0
Subject: Re: LF: Windows software to drive a relay at a given time?
Content-Type: text/plain; charset="iso-8859-1"
Sender: owner-rsgb_lf_group@blacksheep.org
Precedence: bulk
Reply-To: rsgb_lf_group@blacksheep.org
Content-Transfer-Encoding: 8bit

Hello Chris,

just a warning: the COM port outputs tend to be unstable (some consecutive high/low sequences) during booting. 
Taking the high inrush current into account: the PSU (or mains fuse) may dislike that!

73, Rik  ON7YD - OR7T

________________________________________
Van: owner-rsgb_lf_group@blacksheep.org <owner-rsgb_lf_group@blacksheep.org> namens Chris Wilson <dead.fets@gmail.com>
Verzonden: woensdag 11 april 2018 13:37
Aan: Andy Talbot
Onderwerp: Re: LF: Windows software to drive a relay at a given time?

Hello Andy,


Thanks  for  that,  just tried it via Remote Desktop and it appears to
open  port  6  as  requested  fine. But at the designated OFF time the
whole  programme appears to close, is that as expected? I assume prior
to  that  the  port  changes  state  back again? How would you suggest
controlling  an  industrial  single phase contactor? What I want to be
able  to  do is turn on my huge Farnell H50/60 linear power supply via
the  mains  input  at  a given time, and shut it down again at a later
time. It can draw up to 16 Amps constant with a BIG inrush current, so
I  guess  electro  mechanical  switch  is the cheapest option? Thanks
again,  and  thanks  Stefan  re the tip to try Spectrum Lab! (Is there
anything SL cannot do? ;))

Wednesday, April 11, 2018, 12:22:32 PM, you wrote:

> Just in case it matters, I initially test for all valid COM ports
> by opening and closing each in turn,  then testing for an error.
> If that causes problems to anything on another port that has not yet
> been opened, like another PTT control,    it will briefly 'blip'


> Any COM port already open will get rejected by this test so no adverse effect there.


> Andy


> On 11 April 2018 at 12:18, Andy Talbot <andy.g4jnt@gmail.com> wrote:

> Try this
> http://www.g4jnt.com/DropF/simpletimer.zip


> It lets you abort the on time using the [esc] key


> Source code is in there as well


> All in PowerBasic, command line compiler version
> (By far the nicest way to programme simple things that don't need whizzy windows interfaces)


> Andy


--
Best regards,
 Chris                            mailto:dead.fets@gmail.com