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Forum Index : Other Stuff : motorized linear pot

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isochronic
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Joined: 21/01/2012
Location: Australia
Posts: 689
Posted: 01:10am 15 Jun 2019
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A curiosity ..
These look really nifty - I gather they are used in sound mixer desks etc. Been trying hard to design one into a project but haven't got there yet any thoughts ?
 
LadyN

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Joined: 26/01/2019
Location: United States
Posts: 408
Posted: 01:25am 15 Jun 2019
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If you want to sense position, RS232/UART capable digital calipers are available for a few dollars - single digits.

So you could get a dozen of those for one of these .

Unless the feel of a linear pot was needed - but then why motorize it?

On that page, they propose a usecase of interfacing to hardware you cannot/dont want to modify - in that case, a digital caliper based solution would still be cheaper and better (precision).

Feels like a solution looking for a problem.

Looks cool though.
 
isochronic
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Joined: 21/01/2012
Location: Australia
Posts: 689
Posted: 09:35am 15 Jun 2019
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The (video of a) mixer console I saw, showed all the sliders moving back to preset or stored settings. Definitely a pre LCD-and-cheap-micro design !

They are a bit lightweight. Good for a simple no-screen interface or haptic feedback maybe. (Guess who still hates touchscreens )

ed - the budget calipers report changes in movement not absolute values - and the rs-232 has to be monitored for each change - so it can get complex quickly.Edited by chronic 2019-06-16
 
Warpspeed
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Joined: 09/08/2007
Location: Australia
Posts: 4406
Posted: 03:03am 16 Jun 2019
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Also now used on some domestic appliances such as space heaters, stereos, or air conditioners, where you can either make an adjustment at the appliance, or use a hand held remote.

There have been rotary versions of these around for quite a while.

Another interesting component to play with, are the servos used in model radio control. these are now low cost enough to use for all kinds of applications, including moving a potentiometer. Some of these servos are quite fast acting and powerful.Edited by Warpspeed 2019-06-17
Cheers,  Tony.
 
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