[quote author="mcs"]Most of the people here are not trying to make volume controls - they need pots with strange tapers. You could use digipots, but they are not that great (most of them anyway). They have a small number of steps and a very limited voltage range. They also add distortion that the relays don't...
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I agree with you in some respects, although without giving too much away (i'm not allowed to) -- you'd be suprised how many of the uber-high-end console manufacturers use these parts for their analogue desks.
The PGA2311 is a -5V to +5v part, whilst the PGA2310 is a -15v to +15v part. Plus and Minus 15v should be more than adequate headroom - no?
if it's just a pot that you want (not a rotary encoder) then some of the MSP430 devices have an onboard 12bit ADC -- allowing you to sample the voltage through the pot, and having a lookup table on teh device... peice of the preverbial p*ss.
Again, I know I sound a bit too pushy on TI's parts, but all I can say in my defence is that it's really hard working with these parts day in day out, and not having great ideas of where they would fit in audio projects! :wink:
I recommend that you take a look at the PGA2310 part (http://focus.ti.com/docs/prod/folders/print/pga2310.html) - I think you'll find that it's quite a sexy part
Cheers
R
P.S -- as for 8051 devices... TI has some data aquisition parts (ADC and 8051 onboard), although to be honest, I'm not so tuned on these parts. You can one of these parts at: http://focus.ti.com/docs/prod/folders/print/msc1200y2.html :sam:
[/quote]
I agree with you in some respects, although without giving too much away (i'm not allowed to) -- you'd be suprised how many of the uber-high-end console manufacturers use these parts for their analogue desks.
The PGA2311 is a -5V to +5v part, whilst the PGA2310 is a -15v to +15v part. Plus and Minus 15v should be more than adequate headroom - no?
if it's just a pot that you want (not a rotary encoder) then some of the MSP430 devices have an onboard 12bit ADC -- allowing you to sample the voltage through the pot, and having a lookup table on teh device... peice of the preverbial p*ss.
Again, I know I sound a bit too pushy on TI's parts, but all I can say in my defence is that it's really hard working with these parts day in day out, and not having great ideas of where they would fit in audio projects! :wink:
I recommend that you take a look at the PGA2310 part (http://focus.ti.com/docs/prod/folders/print/pga2310.html) - I think you'll find that it's quite a sexy part
Cheers
R
P.S -- as for 8051 devices... TI has some data aquisition parts (ADC and 8051 onboard), although to be honest, I'm not so tuned on these parts. You can one of these parts at: http://focus.ti.com/docs/prod/folders/print/msc1200y2.html :sam: