freddy

http://dkc3.digikey.com/PDF/T082/P1848.pdf)

Unfortunately, I need to get a linear, not logarithmic response from it. What is the easiest way to scale the output accordingly?

I have a logarithmic potentiometer (http://dkc3.digikey.com/PDF/T082/P1848.pdf) that I am reading in serially.

Unfortunately, I need to get a linear, not logarithmic response from it.  What is the easiest way to scale the output accordingly?


converting-logarithmic-response-to-linear

So my logarithmic values range from 0 to 1024.

Does that cause a problem with these objects? The documentation is scarce..

Does that cause a problem with these objects?  The documentation is scarce..


Sure - was just wondering what input / output dbtoa expects.

Also, I believe I *should* be using dbtoa, correct, since I want to go from logarithmic to linear?

> So my logarithmic values range from 0 to 1024.

I think the quickest solution might be to use a table to look up the 

This patcher uses scale to build a log table, then rotates it. There 

are some resolution issues because of the integer nature of table, but 

I bet it would not be too bad in practice.

On May 4, 2008, at 10:46 AM, mtf wrote:
> So my logarithmic values range from 0 to 1024.

I think the quickest solution might be to use a table to look up the  
correct response.

This patcher uses scale to build a log table, then rotates it. There  
are some resolution issues because of the integer nature of table, but  
I bet it would not be too bad in practice.

Chris Muir
cbm@well.com	
http://www.xfade.com

Converting logarithmic response to linear