[sdiy] I2C DAC

[David Brown]

My ComputerVoltageSource http://modularsynthesis.com/cvs/cvs.htm uses 
a 12 bit DAC (it's SPI, not I2C).  What works well is the reference 
voltage for the DAC is 10.666 volts so semitones are exactly on 
voltage at 32H steps each.  It's quite accurate and works very 
well.  In fact, I set the 10.666 reference by comparing a VCO driven 
by the DAC against my standard source.

Dave

At 04:38 PM 6/21/2010, Mike Beauchamp wrote:
>I don't mean to jump in on this thread, but can anyone show me an
>example of a 12-bit DAC  (I2C is fine) that is being used to output
>CV?
>
>I guess I was always under the impression that DAC chips were only
>useful for audio applications (that is, constantly changing values)
>and I never thought they could actually just "hold" a value and do it
>with any stability, etc.
>
>Mike