ComputerVoltageSources

Absolutely.  I would not dedicate any buttons to the LCD.  In fact, 
Run, Stop, and Aux are kind of meaningless.  I can think of only 1 
program I've written where I actually used the Stop for a Stop.  
Typically I use these switches for modes.  This time around I would 
probably add a switch to Aux as well.  Nomenclature could be modified 
as well to a more generic purpose:  Enter, Mode, S1, etc.  Same with 
the LEDs.  I have found that two switches can provide a pretty 
reasonable user interface.  I tend to use one for a mode and one for 
an enter.  That's why the display is so important to provide feedback 
as to the current state.  It is also important to be able to use the 
CV controls for general purpose user input (e.g. waveform, duty cycle, 
mode selection, etc.)  A display is critical to provide feedback for 
this as well.

Just to confuse topics, it might be interesting to see if I can do a 
small AVR processor to use the I2C bus.  I think they support it.  If 
so then we could do an AVR-based process for expansion.

Dave

--- In ComputerVoltageSources@yahoogroups.com, "Grant Richter" 
<grichter@...> wrote:
>
> Works for me.
> 
> When the unit is stopped, the knobs can be mapped differently than 
when in the "Run" 
> mode.
>