From: eat@joes.com   
      
   Jasen Betts wrote:   
      
   >> I'd like to start out with a binary counter with a count of 0-255, and   
   >> either with switches, or preferably a rheostat, slowly lower the maximum   
   >> count, hopefully all the way down to 0-1.   
   >   
   > run the output of the counter into a DAC (digital to analogue converter)   
   > use a comparitor to compare it to the voltage from a potentiometer   
   > across the same supply as the DAC the output of the comparitor feeds   
   > the reset pin of the counter.   
   >   
   > if you really need to use a rheostat instead of a potentiometer   
   > there's probably a way to make that work too.   
   >   
   > a pre-built DAC will probably give smoother tuning of the count than a   
   > simple r-2r ladder, but the only one I found locally requires dual supply   
   >   
   >   
   > Bye.   
   >    Jasen   
      
      
   I think that would work great for my application.  Thank you.   
      
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