Hi all,
I'm currently trying to add much needed programmable EQ to a project.
One of the more obvious ideas I had was to try using motorized potentiometers, I found a part by ALPS, the RK168.. looked alright, was planning on adding a small DC bias on the input and using the ADC of a small micro on each pot to control the motor and hence add the programmable aspect by building off that. Only problem is, I see the RK168 had a rotational speed of 12sec/300deg, which is way too slow for my application.. needs to be more like 1sec/300deg (max) for my application. I noticed another part by ALPS with higher rotational speed, the RK25t, but it seems like it may be out of production as I can't find it anywhere.
So, I'm just wondering if anyone knows of any sources for something similar? The real appeal of the RK168 was the price per unit of around £10. The 100k value I could have worked with also, going much lower would become a bother however.
Cheers!
I'm currently trying to add much needed programmable EQ to a project.
One of the more obvious ideas I had was to try using motorized potentiometers, I found a part by ALPS, the RK168.. looked alright, was planning on adding a small DC bias on the input and using the ADC of a small micro on each pot to control the motor and hence add the programmable aspect by building off that. Only problem is, I see the RK168 had a rotational speed of 12sec/300deg, which is way too slow for my application.. needs to be more like 1sec/300deg (max) for my application. I noticed another part by ALPS with higher rotational speed, the RK25t, but it seems like it may be out of production as I can't find it anywhere.
So, I'm just wondering if anyone knows of any sources for something similar? The real appeal of the RK168 was the price per unit of around £10. The 100k value I could have worked with also, going much lower would become a bother however.
Cheers!
COnsider what the big companies did: use encoders on the panel, and your volume/EQ controls would be digital ICs. You can adjust a digital pot as fast as you can feed it code. You can still use the control for manual adjustment, but the changes stored in memory can be brought up without touching the panel control knobs.
And if I read you right, it sounds more like you want the motor pots for switching between two levels (two at a time, any number total) rather than smooth changes over time. WHy else need fast?
And if I read you right, it sounds more like you want the motor pots for switching between two levels (two at a time, any number total) rather than smooth changes over time. WHy else need fast?