[h0l0cube]

> old school hifi at a thrift shop

I don't think I've ever seen a physical seeking slider. Fast forward, rewind, sure. Maybe even variable fast forward and rewind, but nothing like this, not even on modern analog devices. The main reason would be that it is hard to make seeking accurate and to make the mechanism as well wearing as a button. What I have seen are remote controllable physical volume dials where pressing the remote will actually move the dial, and something like that might be acceptably robust in a consumer product.

> entertainment industry and recording studios have 100s of motorized sliders

Definitely a thing in professional settings, but haven't seen this on consumer level devices.

[stavros]

It's a motorized slide pot, they're usually used as faders in mixing consoles.

[TeMPOraL]

You guys say this like it's an obvious and ubiquitous piece of technology, but then whenever I see someone ask why can't we have smart light switches that work like physical ones (two states) and work both directions (i.e. toggleable remotely), suddenly all I see on the Internet is that it's a weird and stupid idea and why would anyone want that.

It dawns on me that a two-state motorized light switch is a strictly simpler device than a motorized analog slider.

[lloeki]

> why can't we have smart light switches that work like physical ones (two states) and work both directions (i.e. toggleable remotely)

Separate command from power!

Like this? (command + relay(s), inside switch box)

https://kb.shelly.cloud/knowledge-base/shelly-1-mini-gen3#Sh...

https://kb.shelly.cloud/knowledge-base/shelly-plus-2pm#Shell...

or this? (command only, inside switch box, either use a separate smart relay or send on/off commands straight to an always-powered smart bulb)

https://kb.shelly.cloud/knowledge-base/shelly-i4-gen3#Shelly...

or this? (4 command + 4 relays, for breaker box)

https://kb.shelly.cloud/knowledge-base/shelly-pro-4pm-v2#She...

Inputs can be set up as button (so, open/close circuit are an input event) or switch (so, open/close circuit are an input state)

Of course it won't physically change the switch position, but the switch works both ways because you can turn it into a toggle, whatever the current position is.

[bombela]

> Of course it won't physically change the switch position, ...

But that is what we are asking for. That the switch physically moves to follow the state of the system.

I want the switches on either side of a hallway to move in sync.

[TeMPOraL]

Exactly. If we can have (or at least used to be able to) physical sliders that work as both inputs and outputs, then why no wall switches? I want my wall switches be in sync with the state of smart devices - like, if I turn off a smart light remotely via an app, I want the corresponding wall switch to physically flip.

[bombela]

You are right, the seek slider was never common. My initial comment was more general.

I too wish for a motorized light switch. One day I want to make one (I feel that I am slowly reaching the required skills and tools to build it). Of course, the house insurance might not like it.

edit: To be clear, the motorized volume knob was common on consumer devices. It is merely a potentiometer with a motor attached. As far as I knoe it had no sense of position, just turn it until it reaches a hard stop, and the motor is too weak and simply stall. Motorized sliders were and are still common on mixing tables, for sound and light control, and those seem to have positional accuracy. It is quite fun to watch a mixing table move by itself during a performance. I have never seen them used for seek control.

[stavros]

Well, it is obvious, and it used to be ubiquitous. It's also complicated, which makes it expensive and easy to break.

[h0l0cube]

Yep, but it’s not in old analog hifis. A good reason is that tapes and CDs can’t instantly seek. By the time we got mp3 players, it was all about miniaturization, and eventually flat devices and screens. Slide pots for seeking never happened