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Potentiometer Project

Started by Searcher7 November 18, 2021
I'm working on a custom project that involves potentiometers and picture adjustments on the monitor they are connected to.

To determine whether or not the potentiometers I need exist or if I need to build them, I need to resolve two questions and the possible issues they bring up.

1) This may seem like a crazy question, but are there low-friction potentiometers? (I'm referring to the physical friction incorporated into the pot to retard motion).

The reason I ask is because I guesstimate that in an extreme case, I'd need a potentiometer's knob/slide to rotate/travel it's full length 100 times in a single day. (Though in reality there probably wouldn't be that many cycles in a month).

This brings me to the second question.

2) Can a pot with a knob/slide that travels a distance of only one inch be adequate to cover the extremes for image parameters like Brightness, Contrast, Horizontal size, Horizontal position, Vertical size, & Vertical position?

To clarify my goal. I want to be able to quickly establish and lock in all six settings via mechanical means.

Springs will keep the knobs/slides at one side of their range, and when I need the correct settings, a plunger will ensure accurate re-positioning of the knobs/slides.

Thanks.

Darren Harris
Staten Island, New York.
 Searcher7 wrote:
=============
> > 1) This may seem like a crazy question, but are there low-friction potentiometers?
** Yes - the " plastic track " types. Both slide and rotary kinds are very softy and silky in feel.
> 2) Can a pot with a knob/slide that travels a distance of only one inch be adequate to cover > the extremes for image parameters like Brightness, Contrast, Horizontal size, Horizontal > position, Vertical size, & Vertical position?
** Can be done. Now stop being so fucking mysterious and pot some actual details. ...... Phil
Searcher7 prodded the keyboard with:

> I'm working on a custom project that involves potentiometers and > picture adjustments on the monitor they are connected to. > > To determine whether or not the potentiometers I need exist or if I > need to build them, I need to resolve two questions and the possible > issues they bring up. > > 1) This may seem like a crazy question, but are there low-friction > potentiometers? (I'm referring to the physical friction incorporated > into the pot to retard motion). > > The reason I ask is because I guesstimate that in an extreme case, > I'd need a potentiometer's knob/slide to rotate/travel it's full > length 100 times in a single day. (Though in reality there probably > wouldn't be that many cycles in a month). > > This brings me to the second question. > > 2) Can a pot with a knob/slide that travels a distance of only one > inch be adequate to cover the extremes for image parameters like > Brightness, Contrast, Horizontal size, Horizontal position, Vertical > size, & Vertical position? > > To clarify my goal. I want to be able to quickly establish and lock > in all six settings via mechanical means. > > Springs will keep the knobs/slides at one side of their range, and > when I need the correct settings, a plunger will ensure accurate > re-positioning of the knobs/slides. > > Thanks. > > Darren Harris > Staten Island, New York.
Hi Darren, What you are asking used to be commonly done on monitor and TV production lines, before the advent of digital circuits. -- Best Regards: Baron.
On Saturday, November 20, 2021 at 5:15:15 AM UTC-5, Baron wrote:
> Searcher7 prodded the keyboard with: > > I'm working on a custom project that involves potentiometers and=20 > > picture adjustments on the monitor they are connected to.=20 > >=20 > > To determine whether or not the potentiometers I need exist or if I=20 > > need to build them, I need to resolve two questions and the possible=20 > > issues they bring up.=20 > >=20 > > 1) This may seem like a crazy question, but are there low-friction=20 > > potentiometers? (I'm referring to the physical friction incorporated=20 > > into the pot to retard motion).=20 > >=20 > > The reason I ask is because I guesstimate that in an extreme case,=20 > > I'd need a potentiometer's knob/slide to rotate/travel it's full=20 > > length 100 times in a single day. (Though in reality there probably=20 > > wouldn't be that many cycles in a month).=20 > >=20 > > This brings me to the second question.=20 > >=20 > > 2) Can a pot with a knob/slide that travels a distance of only one=20 > > inch be adequate to cover the extremes for image parameters like=20 > > Brightness, Contrast, Horizontal size, Horizontal position, Vertical=20 > > size, & Vertical position?=20 > >=20 > > To clarify my goal. I want to be able to quickly establish and lock=20 > > in all six settings via mechanical means.=20 > >=20 > > Springs will keep the knobs/slides at one side of their range, and=20 > > when I need the correct settings, a plunger will ensure accurate=20 > > re-positioning of the knobs/slides.=20 > >=20 > > Thanks.=20 > >=20 > > Darren Harris=20 > > Staten Island, New York. > Hi Darren,=20 > What you are asking used to be commonly done on monitor and TV=20 > production lines, before the advent of digital circuits.=20 >=20 >=20 > --=20 > Best Regards:=20 > Baron.
The idea is to do this mechanicaally and stay away from digital circuits. I designed a switcher that would allow me to switch between a dozen game PC= Bs. All of which will individually use the same monitor. But certain image parameters may vary from one game board to the next and i= t would be too much of a pain to open up the cabinet and manipulate control= s on the chassis every time I needed to correct the picture. I can just co= nnect and make them part of the mechanical switching action, which is initi= ated by a knob I push and turn. If anyone has ideas on where to get sliding poteniometers I can use for thu= is project, I'd appreciated it. Thanks. Darren Harris Staten Island, New York.
Searcher7 prodded the keyboard with:

> On Saturday, November 20, 2021 at 5:15:15 AM UTC-5, Baron wrote: >> Searcher7 prodded the keyboard with: >> > I'm working on a custom project that involves potentiometers and >> > picture adjustments on the monitor they are connected to. >> > >> > To determine whether or not the potentiometers I need exist or if >> > I need to build them, I need to resolve two questions and the >> > possible issues they bring up. >> > >> > 1) This may seem like a crazy question, but are there >> > low-friction potentiometers? (I'm referring to the physical >> > friction incorporated into the pot to retard motion). >> > >> > The reason I ask is because I guesstimate that in an extreme >> > case, I'd need a potentiometer's knob/slide to rotate/travel it's >> > full length 100 times in a single day. (Though in reality there >> > probably wouldn't be that many cycles in a month). >> > >> > This brings me to the second question. >> > >> > 2) Can a pot with a knob/slide that travels a distance of only >> > one inch be adequate to cover the extremes for image parameters >> > like Brightness, Contrast, Horizontal size, Horizontal position, >> > Vertical size, & Vertical position? >> > >> > To clarify my goal. I want to be able to quickly establish and >> > lock in all six settings via mechanical means. >> > >> > Springs will keep the knobs/slides at one side of their range, >> > and when I need the correct settings, a plunger will ensure >> > accurate re-positioning of the knobs/slides. >> > >> > Thanks. >> > >> > Darren Harris >> > Staten Island, New York. >> Hi Darren, >> What you are asking used to be commonly done on monitor and TV >> production lines, before the advent of digital circuits. >> >> >> -- >> Best Regards: >> Baron. > > The idea is to do this mechanicaally and stay away from digital > circuits. > > I designed a switcher that would allow me to switch between a dozen > game PCBs. All of which will individually use the same monitor. > > But certain image parameters may vary from one game board to the > next and it would be too much of a pain to open up the cabinet and > manipulate controls on the chassis every time I needed to correct > the picture. I can just connect and make them part of the > mechanical switching action, which is initiated by a knob I push and > turn. > > If anyone has ideas on where to get sliding poteniometers I can use > for thuis project, I'd appreciated it. > > Thanks. > > Darren Harris > Staten Island, New York.
Have you considered the motorised sliders as used on sound mixer decks ? -- Best Regards: Baron.
On Sunday, November 21, 2021 at 3:02:54 PM UTC-5, Baron wrote:
> Searcher7 prodded the keyboard with: > > > On Saturday, November 20, 2021 at 5:15:15 AM UTC-5, Baron wrote: > >> Searcher7 prodded the keyboard with: > >> > I'm working on a custom project that involves potentiometers and > >> > picture adjustments on the monitor they are connected to. > >> > > >> > To determine whether or not the potentiometers I need exist or if > >> > I need to build them, I need to resolve two questions and the > >> > possible issues they bring up. > >> > > >> > 1) This may seem like a crazy question, but are there > >> > low-friction potentiometers? (I'm referring to the physical > >> > friction incorporated into the pot to retard motion). > >> > > >> > The reason I ask is because I guesstimate that in an extreme > >> > case, I'd need a potentiometer's knob/slide to rotate/travel it's > >> > full length 100 times in a single day. (Though in reality there > >> > probably wouldn't be that many cycles in a month). > >> > > >> > This brings me to the second question. > >> > > >> > 2) Can a pot with a knob/slide that travels a distance of only > >> > one inch be adequate to cover the extremes for image parameters > >> > like Brightness, Contrast, Horizontal size, Horizontal position, > >> > Vertical size, & Vertical position? > >> > > >> > To clarify my goal. I want to be able to quickly establish and > >> > lock in all six settings via mechanical means. > >> > > >> > Springs will keep the knobs/slides at one side of their range, > >> > and when I need the correct settings, a plunger will ensure > >> > accurate re-positioning of the knobs/slides. > >> > > >> > Thanks. > >> > > >> > Darren Harris > >> > Staten Island, New York. > >> Hi Darren, > >> What you are asking used to be commonly done on monitor and TV > >> production lines, before the advent of digital circuits. > >> > >> > >> -- > >> Best Regards: > >> Baron. > > > > The idea is to do this mechanicaally and stay away from digital > > circuits. > > > > I designed a switcher that would allow me to switch between a dozen > > game PCBs. All of which will individually use the same monitor. > > > > But certain image parameters may vary from one game board to the > > next and it would be too much of a pain to open up the cabinet and > > manipulate controls on the chassis every time I needed to correct > > the picture. I can just connect and make them part of the > > mechanical switching action, which is initiated by a knob I push and > > turn. > > > > If anyone has ideas on where to get sliding poteniometers I can use > > for thuis project, I'd appreciated it. > > > > Thanks. > > > > Darren Harris > > Staten Island, New York. > Have you considered the motorised sliders as used on sound mixer > decks ? > > -- > Best Regards: > Baron.
No. I have no idea what that is, but if they are motorized they wouldn't work for me. Darren Harris Staten Island, New York.