[simpits-tech] Switchs, Rotary and pot
Marv De Beque
simpits-tech@simpits.org
Tue, 06 Aug 2002 06:45:17 -0400
Ah, too far to drive. ;-)
--
> From: "Frank Riedel" <frank@rezultat.dk>
> Reply-To: simpits-tech@simpits.org
> Date: Tue, 6 Aug 2002 10:42:57 +0200
> To: <simpits-tech@simpits.org>
> Subject: Re: [simpits-tech] Switchs, Rotary and pot
>
> 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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>>> above
>>>>>>> page. Thanks!
>>>>>>>
>>>>>>>
>>>>>>> _______________________________________________
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> above
>>>>> page.
>>>>>>> Thanks!
>>>>>>
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> above
>>>>> page. Thanks!
>>>>>
>>>>>
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>>>>> Thanks!
>>>>
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>
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