linuxworks
Member of the Trade: Sercona Audio
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- Oct 10, 2008
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here's a UI question that I'm trying to work out-
I am determined to get a good clean implementation of a motorized volume control on my 'rackmount' headphones amp. its all DIY so I can design the user interface any way I want.
I've been using a standard IR remote and allocating 2 buttons for volume up and down, as you'd expect. it works ok but I'm starting to think that a dual speed up/down style might be better. 2 more buttons that move up and down but run at 2x the speed or something like that.
has anyone done that before? liked it or found it overkill?
when I use a '12v motor' pot and send 5v to it it runs kind of slow - BUT that's a good thing for small steps or 'nudges' when you want to move 'a bit' up or down. otoh, if you are watching a movie and a commercial comes on, you *know* it will be 3-6db louder than the main program (sigh) and so you *want* a really fast 'shuttle' on the volume knob. right?
I'd like to see comments on this topic. is it worth doing a dual speed pot implementation. how would you do it (using standard h-bridge drivers)? would you use 2 levels of constant DC or some kind of variable PWM?
and also, is this really a good use of 2 extra buttons on a remote? I do have 14 buttons I can use but ultimately I plan to copy the IR codes over to my learning remote and that will be the one that will have to send out as fast-up, slow-up, fast-down or slow-down button press; and I'll have to find ways on the universal remote to map these 'extra' 2 buttons, somehow.
is it worth it? I guess that's the first question
I am determined to get a good clean implementation of a motorized volume control on my 'rackmount' headphones amp. its all DIY so I can design the user interface any way I want.
I've been using a standard IR remote and allocating 2 buttons for volume up and down, as you'd expect. it works ok but I'm starting to think that a dual speed up/down style might be better. 2 more buttons that move up and down but run at 2x the speed or something like that.
has anyone done that before? liked it or found it overkill?
when I use a '12v motor' pot and send 5v to it it runs kind of slow - BUT that's a good thing for small steps or 'nudges' when you want to move 'a bit' up or down. otoh, if you are watching a movie and a commercial comes on, you *know* it will be 3-6db louder than the main program (sigh) and so you *want* a really fast 'shuttle' on the volume knob. right?
I'd like to see comments on this topic. is it worth doing a dual speed pot implementation. how would you do it (using standard h-bridge drivers)? would you use 2 levels of constant DC or some kind of variable PWM?
and also, is this really a good use of 2 extra buttons on a remote? I do have 14 buttons I can use but ultimately I plan to copy the IR codes over to my learning remote and that will be the one that will have to send out as fast-up, slow-up, fast-down or slow-down button press; and I'll have to find ways on the universal remote to map these 'extra' 2 buttons, somehow.
is it worth it? I guess that's the first question