[simpits-tech] Switchs, Rotary and pot
Frank Riedel
simpits-tech@simpits.org
Tue, 6 Aug 2002 10:42:57 +0200
I'm in Denmark :o)
Frank
----- Original Message -----
From: "Marv De Beque" <mdebeque@woh.rr.com>
To: <simpits-tech@simpits.org>
Sent: Tuesday, August 06, 2002 2:38 AM
Subject: Re: [simpits-tech] Switchs, Rotary and pot
> You are doing fine with the English. I had a rotten time with English in
> school (and I am an American). So, I had to work hard catching up with my
> writing and reading skills in college. ;-)
>
> Sounds like you are doing well on your design.
>
> What country do you hail from?
> --
>
>
> > From: "Frank Riedel" <frank@rezultat.dk>
> > Reply-To: simpits-tech@simpits.org
> > Date: Tue, 6 Aug 2002 01:15:04 +0200
> > To: <simpits-tech@simpits.org>
> > Subject: Re: [simpits-tech] Switchs, Rotary and pot
> >
> > Hi Marv !
> > I'm at start of and F16 pit... FANTASTIC RESOURCE ON THE WEB (THANKS)
> > trying to build a list of parts to put on to my panels... - thats why
all
> > the qustions.
> > I just sendt all of DXF to plastic "cut-out" company.
> > all made of clear 4mm plastic. i'll place a transperant
> > printet panel on top to get the backlight of the panels...
> > The tube is no prob.
> > so... next step for me is to learn more about EPIC and
> > all that follows... wireing all the switches and rotary, lamps etc.
> > Do not have an EPIC yet...
> > Overall goal is to finish all panels first...
> > second get the EPIC incl. modul (what i need here i'll find out ;o))
> > third, i'll mount it all in the tube and start wireing it up...
> > and last... get the software running ;o) (witch i'll get more info from
you
> > guys over the winther)
> > so, it like building a RC-model... little by little it all come toghter
;o)
> > Hope my english is okay :o))
> >
> > Frank
> >
> > ----- Original Message -----
> > From: "Marv De Beque" <mdebeque@woh.rr.com>
> > To: <simpits-tech@simpits.org>
> > Sent: Tuesday, August 06, 2002 12:31 AM
> > Subject: Re: [simpits-tech] Switchs, Rotary and pot
> >
> >
> >> That is an open question.
> >>
> >> The answer is, it depends.
> >>
> >> However, you have not qualified the exact application, so it is hard to
> > give
> >> you a good answer.
> >>
> >> However, since I am constructing a F-16 cockpit, I can tell you what I
> > plan
> >> to use. I will use a potentiometer for almost all of my applications
> > where
> >> there is a knob. Except....
> >>
> >> ... the caveat is there are many knobs that use a rotary switch and I
will
> >> use a rotary switch where it is required. I think you know what a
rotary
> >> switch is, but if not, it is a mechanical switch that rotates to preset
> >> positions.
> >>
> >> There are not too many places where an encoder will be applicable in my
> > sim.
> >> I may possibly use them for the ICP panel that sticks in the pilots
face.
> >> There are 4 thumb wheels that control contrast, brightness, and other
> >> functions on the HUD. An encoder may be physically easier to mount
than a
> >> pot in those instances.
> >>
> >> Encoders require more expensive circuitry to operate than a pot.
General
> >> rule of thumb is that there should be a good reason for using an
encoder
> >> where normally a pot will not do.
> >>
> >> I would recommend a pot.
> >>
> >> That being said, from the scope of the questions you are asking, I
wonder
> >> where you are at in your project and what your project goals are? I
ask
> >> because I get a sense that you might be putting the cart before the
horse.
> >>
> >> What is your goal and what is your plan to get there?
> >>
> >> I am sure that you can get all the help you need right here, but it is
> > good
> >> to get the basics first, outline your goals, and then we can help you
> >> execute your plan (or at least help you get a plan together).
> >>
> >> Marv
> >> --
> >>
> >>
> >>> From: "Frank Riedel" <frank@rezultat.dk>
> >>> Reply-To: simpits-tech@simpits.org
> >>> Date: Tue, 6 Aug 2002 00:09:33 +0200
> >>> To: <simpits-tech@simpits.org>
> >>> Subject: Re: [simpits-tech] Switchs, Rotary and pot
> >>>
> >>> Great exampels ;o)
> >>> GOT IT ;o)
> >>> BUT - can i use POT instead of ENCODERS in my pit ???
> >>>
> >>> Frank
> >>>
> >>> ----- Original Message -----
> >>> From: "Marv De Beque" <mdebeque@woh.rr.com>
> >>> To: <simpits-tech@simpits.org>
> >>> Sent: Monday, August 05, 2002 11:57 PM
> >>> Subject: Re: [simpits-tech] Switchs, Rotary and pot
> >>>
> >>>
> >>>> No.
> >>>>
> >>>> A pot (short for potentiometer) is a device that rotates over a given
> >>>> portion of a circle. This is usually about 270 degrees, but there
are
> >>>> multi-turn pots that rotate 5, 10, or 20 turns from lock to lock.
> >>>>
> >>>> A pot is nothing more than a resistor that can be changed from zero
> >>>> (usually) to its maximum value. 100,000 Ohms is typical for
simulator
> >>> use.
> >>>>
> >>>> A pot, theoretically, has an infinite adjustment between its two
> > extreme
> >>>> values (i.e., 0 to 100,000 Ohms). So, like a faucet (in good working
> >>>> order), you can adjust the flow to any value in between.
> >>>>
> >>>> A rotary encoder is different. It is a device that rotates like a
pot,
> >>> but
> >>>> instead of acting like a variable resistor, it sends out a set of
> > pulses
> >>> as
> >>>> the knob turns. It is sort of like putting playing cards on the
forks
> > of
> >>> a
> >>>> bicycle and turning the wheel. As each spoke passes, an audible
click
> > is
> >>>> heard (a pulse). You can count the pulses and then determine how far
> > the
> >>>> wheel has rotated. You need two two playing cards slightly offset in
> > an
> >>>> angular fashion to tell which direction the wheel is rotating. By
> > looking
> >>>> at which card clicks first you can tell direction of spin.
> >>>>
> >>>> The thing about encoders is that they have a "granularity". Unlike a
> > pot
> >>>> which is infinite, there are finite steps to an encoder. There may
be
> > any
> >>>> number of steps you can get from a few to several hundred steps per
> >>>> revolution. You can resolve the rotation only down to the step, but
> > you
> >>> can
> >>>> not tell how much an encoder rotates between step steps (i.e., a half
> >>> step).
> >>>>
> >>>> Most encoders do not remember their positions when power to the
system
> > is
> >>>> turned off. So, the system must somehow save the last known position
> > if
> >>> it
> >>>> is to pick up where it left off at power down. A pot has the same
> >>>> resistance whether the system has power or not.
> >>>>
> >>>> A pot almost always has a mechanical stop. Resistance can only go so
> > far.
> >>>> An encoder does not necessarily have a mechanical stop and can be
> > rotated
> >>>> continuously without stopping.
> >>>>
> >>>> An example of an encoder is a computer mouse (at least the old ones).
> >>> Some
> >>>> new car stereos have them too.
> >>>>
> >>>> Two different animals that can be used in similar ways and each has
its
> >>>> advantages.
> >>>>
> >>>> Sorry for the long message, but I am short on time.
> >>>>
> >>>> Marv
> >>>> --
> >>>>
> >>>>
> >>>>> From: "Frank Riedel" <frank@rezultat.dk>
> >>>>> Reply-To: simpits-tech@simpits.org
> >>>>> Date: Mon, 5 Aug 2002 23:35:45 +0200
> >>>>> To: <simpits-tech@simpits.org>
> >>>>> Subject: Re: [simpits-tech] Switchs, Rotary and pot
> >>>>>
> >>>>> Thanks alot for the explanation ;o)
> >>>>>
> >>>>> I found the F16 panels at simpits.org...
> >>>>>
> >>>>> Did i get it right - rotary encoders = potentiometers ??
> >>>>>
> >>>>> Thanks
> >>>>> Frank !
> >>>>>
> >>>>> ----- Original Message -----
> >>>>> From: "Andreas Fransson" <andreas.fransson@post.utfors.se>
> >>>>> To: <simpits-tech@simpits.org>
> >>>>> Sent: Monday, August 05, 2002 9:09 PM
> >>>>> Subject: Re: [simpits-tech] Switchs, Rotary and pot
> >>>>>
> >>>>>
> >>>>>> Frank,
> >>>>>>
> >>>>>> 3-way switches are (usually) on-off-on. With or without automatic
> >>> return
> >>>>> to
> >>>>>> center position (not sure what the english expression for this
would
> >>> be).
> >>>>>>
> >>>>>> Rotaries, if you mean rotary switches and not rotary encoders, may
or
> >>> may
> >>>>>> not have limits. A couple I have here for example do not. They go
all
> >>> the
> >>>>>> way around. What they do is just rotate a common ground around a
> > number
> >>> of
> >>>>>> connections. Like a "normal" switch but with many more positions.
> > Mine
> >>>>> have
> >>>>>> 12 I think. You could say that they are "all-on" in the sense that
> > one
> >>>>> lead
> >>>>>> is always active. Encoders are a different breed altogether. They
are
> >>>>>> commonly used to sense motion (rotation) rather than indicate
switch
> >>>>>> positions.
> >>>>>>
> >>>>>> "Pots", or potentiometers, are basically variable resistors. I you
> > use
> >>> one
> >>>>>> with EPIC, or as a replacement for a joystick pot, it is 100 ohm
> > linear
> >>>>> pots
> >>>>>> you want.
> >>>>>>
> >>>>>> If you use the EPIC, the kind of switches you use are almost
> >>> unimportant.
> >>>>>> EPL (the EPIC programming language) is very flexible. It's not at
all
> >>> like
> >>>>>> the standard joystick momentary on/off pushbuttons.
> >>>>>>
> >>>>>> What aircraft (or whatever) panels are you looking for?
> >>>>>>
> >>>>>> Andreas
> >>>>>> http://valhallainc.d2g.com
> >>>>>>
> >>>>>>
> >>>>>> From: "Frank Riedel" <frank@rezultat.dk>
> >>>>>>> Hi All !
> >>>>>>>
> >>>>>>> 3 way switchs - is that off-on-off or ????
> >>>>>>> Rotary - is that 360 dg. or ???
> >>>>>>> 2 way switchs - is that on-on or ???
> >>>>>>> Pot - is that a normal potmeter 100 ohm or ???
> >>>>>>> Is EPIC control all those switchs nomatter if it is on-of or on-on
> > ???
> >>>>>>>
> >>>>>>> Do anyone of you guys have a link to a page where i can read about
> > it
> >>>>> ???
> >>>>>>>
> >>>>>>> and do anyone have a set of drawings of panels without knobs on
????
> >>>>>>>
> >>>>>>> thanks for all your help... i'm on the road for my first real pit
> > ;o)
> >>>>>>>
> >>>>>>> Frank
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>> _______________________________________________
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> >>>>>> Simpits-tech@simpits.org
> >>>>>> http://www.simpits.org/mailman/listinfo/simpits-tech
> >>>>>> To unsubscribe, please see the instructions at the bottom of the
> > above
> >>>>> page. Thanks!
> >>>>>
> >>>>>
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> >>> page.
> >>>>> Thanks!
> >>>>
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> >>>
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> >>
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> >
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